Basis of Presentation and Recent Accounting Pronouncements (Policies)	6 Months Ended
Jun. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited quarterly condensed consolidated financial statements of WTW and our subsidiaries are presented in accordance with the rules and regulations of the SEC for quarterly reports on Form 10-Q and therefore certain footnote disclosures have been condensed or omitted from these financial statements as they are not required for interim reporting under U.S. GAAP. In the opinion of management, these condensed consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments, which are necessary for a fair presentation of the condensed consolidated financial statements and results for the interim periods. All intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated financial statements should be read together with the Company’s Annual Report on Form 10-K, filed with the SEC on February 22, 2024, and may be accessed via EDGAR on the SEC’s web site at www.sec.gov. The results of operations for the three and six months ended June 30, 2024 are not necessarily indicative of the results that can be expected for the entire year. The Company experiences seasonal fluctuations of its revenue. Revenue is typically higher during the Company’s first and fourth quarters due primarily to the timing of broking-related activities. The results reflect certain estimates and assumptions made by management, including those estimates used in calculating acquisition consideration and fair value of tangible and intangible assets and acquisition-related liabilities, professional liability claims, estimated bonuses, valuation of billed and unbilled receivables, and anticipated tax liabilities that affect the amounts reported in the condensed consolidated financial statements and related notes.
Employee Share Purchase Plan	Employee Share Purchase Plan — In the second quarter of 2024, the Company launched an employee share purchase plan (‘ESPP’) which is initially available to colleagues in North America and certain other countries. The ESPP operates under the WTW Amended and Restated 2010 Employee Share Purchase Plan, as amended and restated on February 28, 2024. The ESPP allows eligible colleagues to defer a portion of their after-tax income during biannual six-month offering periods, at the end of which periods amounts deferred are converted to shares using the Company’s closing share price on the last trading day of the applicable offering period with a 15% discount applied. The ESPP has 1,377,500 shares available for purchase. ASC 840, Distinguishing Liabilities from Equity, requires these deferred amounts to be recognized as liabilities, which we have included in other current liabilities on our accompanying condensed consolidated balance sheet until they are converted to shares on the purchase date.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Not Yet Adopted In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which is intended to improve the transparency of income tax disclosures by requiring consistent categories and greater disaggregation of information within the income tax rate reconciliation and income taxes paid disclosures. It also includes certain other amendments intended to improve the effectiveness of income tax disclosures. Specifically, this ASU requires a tabular income tax rate reconciliation using both percentages and amounts disaggregated into specific categories with certain reconciling items at or above 5% of the statutory tax, further disaggregated by its nature and/or jurisdiction. Additionally, income taxes paid will be required to be presented by federal, state, local and foreign jurisdictions, including amounts paid to individual jurisdictions representing 5% or more of the total income taxes paid. This ASU becomes effective for the Company on January 1, 2025, with early adoption permitted. The guidance is applied prospectively, with the option for retrospective application. The Company does not plan to early-adopt this ASU and is assessing the expected impact on its condensed consolidated financial statements. In March 2024, the SEC adopted final rules on the enhancement and standardization of climate-related disclosures for investors. The rules require disclosure of certain climate-related information in registration statements and annual reports on Form 10-K. For example, the rules require the notes to the financial statements to include disclosure regarding the effects of severe weather events and other natural conditions, subject to certain materiality thresholds. Additionally, the rules also require certain other disclosures outside of the financial statements. Among other things, these requirements include Scope 1 (direct) and Scope 2 (indirect from purchased energy) greenhouse gas (‘GHG’) emissions, if material, which will be subject to assurance requirements that will be phased in, as well as governance, oversight and risk management disclosures, which include any transition plan adopted to manage material transition risk, and material climate targets and goals. The rules become effective in phases, currently beginning with any material current-year effects of severe weather events and other natural conditions and the more qualitative disclosures being required for inclusion in the Company’s 2025 Form 10-K, and some of the other more quantitative disclosures being required for the 2026 Form 10-K. While the disclosures are meant to cover the same periods in the financial statements, the requirements may be adopted on a prospective basis beginning with 2025. The Scope 1 and Scope 2 GHG emissions disclosures, which are required for the 2026 fiscal year, allow for additional time but must be filed by the due date of the second quarterly report on Form 10-Q or by amending the Form 10-K by that same deadline. Third-party limited assurance of the GHG emissions disclosures is required for the Company’s 2029 Form 10-K and reasonable assurance is required for the Company’s 2033 Form 10-K. Following a number of legal challenges to the final rule that have been consolidated for review in the U.S. Court of Appeals for the Eighth Circuit, the SEC has voluntarily stayed the newly-released climate rules pending the completion of judicial review of such consolidated petitions to avoid regulatory uncertainty for companies subject to the rule while the litigation proceeds. The Company is monitoring the outcome of the litigation and will provide the required disclosures if and when required. Adopted In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which is intended to improve reportable segment disclosure requirements through enhanced disclosures about significant segment expenses. Among other amendments, this ASU creates a ‘significant expense principle,’ and adds required disclosures of significant expenses for each reportable segment, as well as certain other disclosures to help investors understand how the chief operating decision maker (‘CODM’) evaluates segment expenses and operating results. In addition, this ASU requires for interim periods all disclosures about a reportable segment’s profit or loss and assets under ASC 280, Segment Reporting that had previously only been provided annually (e.g., interest income and expense, depreciation and amortization expense). The annual requirements of this ASU became effective for the Company on January 1, 2024, at which time it was adopted; the Company will include the new disclosures in our Annual Report on Form 10-K for the year ended December 31, 2024, as required. New interim disclosures are required for fiscal years beginning January 1, 2025 and will be included at that time.
Other Legislation	Other Legislation Inflation Reduction Act The Inflation Reduction Act (the ‘IRA’) was enacted into law on August 16, 2022 and certain portions of the IRA became effective January 1, 2023. The IRA introduced, among other provisions, a share repurchase excise tax and a new Corporate Alternative Minimum Tax (‘CAMT’) which imposes a 15% tax on the adjusted financial statement income of ‘applicable corporations’. New rules included in the proposed regulations issued on April 9, 2024 apply to share repurchases after April 12, 2024. The Company does not expect the excise tax or, to the extent applicable, CAMT to have a significant impact on its condensed consolidated financial statements. Pillar Two On October 8, 2021, the Organisation for Economic Co-operation and Development (‘OECD’) announced an international agreement with more than 140 countries to implement a two-pillar solution to address tax challenges arising from the digitalization of the economy. The agreement introduced rules that would result in the reallocation of certain taxing rights over multinational companies from their home countries to the markets where they have business activities and earn profits, regardless of physical presence (‘Pillar One’) and introduced a global corporate minimum tax of 15% for certain large multinational companies starting in 2024 (‘Pillar Two’). On December 20, 2021, the OECD/G20 Inclusive Framework on Base Erosion and Profit Shifting released the Model Global Anti-Base Erosion (‘GloBE’) rules (the ‘OECD Model Rules’) under Pillar Two. On December 12, 2022, E.U. member states reached an agreement to implement Pillar Two and this requires E.U. member states to enact domestic legislation to put Pillar Two into effect. In 2023, many E.U. countries enacted the necessary legislation (based on the OECD Model Rules) to implement Pillar Two in 2024. Ireland, in particular, enacted Pillar Two by signing Finance (No. 2) Bill 2023 into law in December 2023. Other countries and territories have indicated they will introduce Pillar Two beginning in 2025. While we do not anticipate that this legislation will have a material impact on our tax provision or effective tax rate, we continue to monitor evolving tax legislation in the jurisdictions in which we operate.
Fair Value of Financial Instruments	The Company has categorized its assets and liabilities that are measured at fair value on a recurring and non-recurring basis into a three-level fair value hierarchy, based on the reliability of the inputs used to determine fair value as follows: • Level 1: refers to fair values determined based on quoted market prices in active markets for identical assets; • Level 2: refers to fair values estimated using observable market-based inputs or unobservable inputs that are corroborated by market data; and • Level 3: includes fair values estimated using unobservable inputs that are not corroborated by market data. The following methods and assumptions were used by the Company in estimating its fair value disclosure for financial instruments: • Mutual funds and exchange-traded funds are classified as Level 1 because we use quoted market prices in active markets in determining the fair value of these securities. • Commingled funds are not leveled within the fair value hierarchy as the funds are valued at the net value of shares held as reported by the manager of the funds. These funds are not exchange-traded. • Hedge funds are not leveled within the fair value hierarchy as the fair values for these investments are estimated based on the net asset values derived from the latest audited financial statements or most recent capital account statements provided by the funds’ investment manager or third-party administrator, as a practical expedient. • Market values for our derivative instruments have been used to determine the fair values of forward and option foreign exchange contracts based on estimated amounts the Company would receive or have to pay to terminate the agreements, taking into account observable information about the current foreign currency forward rates. Such financial instruments are classified as Level 2. • Contingent consideration payable is classified as Level 3, and we estimate fair value based on the likelihood and timing of achieving the relevant milestones of each arrangement, applying a probability assessment to each of the potential outcomes, which at times includes the use of a Monte Carlo simulation and discounting the probability-weighted payout. Typically, milestones are based on revenue or earnings growth for the acquired business.

Basis of Presentation and Recent Accounting Pronouncements (Policies)

6 Months Ended

Jun. 30, 2024

The accompanying unaudited quarterly condensed consolidated financial statements of WTW and our subsidiaries are presented in accordance with the rules and regulations of the SEC for quarterly reports on Form 10-Q and therefore certain footnote disclosures have been condensed or omitted from these financial statements as they are not required for interim reporting under U.S. GAAP. In the opinion of management, these condensed consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments, which are necessary for a fair presentation of the condensed consolidated financial statements and results for the interim periods. All intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated financial statements should be read together with the Company’s Annual Report on Form 10-K, filed with the SEC on February 22, 2024, and may be accessed via EDGAR on the SEC’s web site at www.sec.gov.

The results of operations for the three and six months ended June 30, 2024 are not necessarily indicative of the results that can be expected for the entire year. The Company experiences seasonal fluctuations of its revenue. Revenue is typically higher during the Company’s first and fourth quarters due primarily to the timing of broking-related activities. The results reflect certain estimates and assumptions made by management, including those estimates used in calculating acquisition consideration and fair value of tangible and intangible assets and acquisition-related liabilities, professional liability claims, estimated bonuses, valuation of billed and unbilled receivables, and anticipated tax liabilities that affect the amounts reported in the condensed consolidated financial statements and related notes.

Employee Share Purchase Plan

Employee Share Purchase Plan — In the second quarter of 2024, the Company launched an employee share purchase plan (‘ESPP’) which is initially available to colleagues in North America and certain other countries. The ESPP operates under the WTW Amended and Restated 2010 Employee Share Purchase Plan, as amended and restated on February 28, 2024. The ESPP allows eligible colleagues to defer a portion of their after-tax income during biannual six-month offering periods, at the end of which periods amounts

deferred are converted to shares using the Company’s closing share price on the last trading day of the applicable offering period with a 15% discount applied. The ESPP has 1,377,500 shares available for purchase. ASC 840, Distinguishing Liabilities from Equity, requires these deferred amounts to be recognized as liabilities, which we have included in other current liabilities on our accompanying condensed consolidated balance sheet until they are converted to shares on the purchase date.

Recent Accounting Pronouncements

Not Yet Adopted

In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which is intended to improve the transparency of income tax disclosures by requiring consistent categories and greater disaggregation of information within the income tax rate reconciliation and income taxes paid disclosures. It also includes certain other amendments intended to improve the effectiveness of income tax disclosures. Specifically, this ASU requires a tabular income tax rate reconciliation using both percentages and amounts disaggregated into specific categories with certain reconciling items at or above 5% of the statutory tax, further disaggregated by its nature and/or jurisdiction. Additionally, income taxes paid will be required to be presented by federal, state, local and foreign jurisdictions, including amounts paid to individual jurisdictions representing 5% or more of the total income taxes paid. This ASU becomes effective for the Company on January 1, 2025, with early adoption permitted. The guidance is applied prospectively, with the option for retrospective application. The Company does not plan to early-adopt this ASU and is assessing the expected impact on its condensed consolidated financial statements.

In March 2024, the SEC adopted final rules on the enhancement and standardization of climate-related disclosures for investors. The rules require disclosure of certain climate-related information in registration statements and annual reports on Form 10-K. For example, the rules require the notes to the financial statements to include disclosure regarding the effects of severe weather events and other natural conditions, subject to certain materiality thresholds. Additionally, the rules also require certain other disclosures outside of the financial statements. Among other things, these requirements include Scope 1 (direct) and Scope 2 (indirect from purchased energy) greenhouse gas (‘GHG’) emissions, if material, which will be subject to assurance requirements that will be phased in, as well as governance, oversight and risk management disclosures, which include any transition plan adopted to manage material transition risk, and material climate targets and goals.

The rules become effective in phases, currently beginning with any material current-year effects of severe weather events and other natural conditions and the more qualitative disclosures being required for inclusion in the Company’s 2025 Form 10-K, and some of the other more quantitative disclosures being required for the 2026 Form 10-K. While the disclosures are meant to cover the same periods in the financial statements, the requirements may be adopted on a prospective basis beginning with 2025. The Scope 1 and Scope 2 GHG emissions disclosures, which are required for the 2026 fiscal year, allow for additional time but must be filed by the due date of the second quarterly report on Form 10-Q or by amending the Form 10-K by that same deadline. Third-party limited assurance of the GHG emissions disclosures is required for the Company’s 2029 Form 10-K and reasonable assurance is required for the Company’s 2033 Form 10-K.

Following a number of legal challenges to the final rule that have been consolidated for review in the U.S. Court of Appeals for the Eighth Circuit, the SEC has voluntarily stayed the newly-released climate rules pending the completion of judicial review of such consolidated petitions to avoid regulatory uncertainty for companies subject to the rule while the litigation proceeds. The Company is monitoring the outcome of the litigation and will provide the required disclosures if and when required.

Adopted

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which is intended to improve reportable segment disclosure requirements through enhanced disclosures about significant segment expenses. Among other amendments, this ASU creates a ‘significant expense principle,’ and adds required disclosures of significant expenses for each reportable segment, as well as certain other disclosures to help investors understand how the chief operating decision maker (‘CODM’) evaluates segment expenses and operating results. In addition, this ASU requires for interim periods all disclosures about a reportable segment’s profit or loss and assets under ASC 280, Segment Reporting that had previously only been provided annually (e.g., interest income and expense, depreciation and amortization expense). The annual requirements of this ASU became effective for the Company on January 1, 2024, at which time it was adopted; the Company will include the new disclosures in our Annual Report on Form 10-K for the year ended December 31, 2024, as required. New interim disclosures are required for fiscal years beginning January 1, 2025 and will be included at that time.

Other Legislation

Inflation Reduction Act

The Inflation Reduction Act (the ‘IRA’) was enacted into law on August 16, 2022 and certain portions of the IRA became effective January 1, 2023. The IRA introduced, among other provisions, a share repurchase excise tax and a new Corporate Alternative

Minimum Tax (‘CAMT’) which imposes a 15% tax on the adjusted financial statement income of ‘applicable corporations’. New rules included in the proposed regulations issued on April 9, 2024 apply to share repurchases after April 12, 2024. The Company does not expect the excise tax or, to the extent applicable, CAMT to have a significant impact on its condensed consolidated financial statements.

Pillar Two

On October 8, 2021, the Organisation for Economic Co-operation and Development (‘OECD’) announced an international agreement with more than 140 countries to implement a two-pillar solution to address tax challenges arising from the digitalization of the economy. The agreement introduced rules that would result in the reallocation of certain taxing rights over multinational companies from their home countries to the markets where they have business activities and earn profits, regardless of physical presence (‘Pillar One’) and introduced a global corporate minimum tax of 15% for certain large multinational companies starting in 2024 (‘Pillar Two’). On December 20, 2021, the OECD/G20 Inclusive Framework on Base Erosion and Profit Shifting released the Model Global Anti-Base Erosion (‘GloBE’) rules (the ‘OECD Model Rules’) under Pillar Two. On December 12, 2022, E.U. member states reached an agreement to implement Pillar Two and this requires E.U. member states to enact domestic legislation to put Pillar Two into effect. In 2023, many E.U. countries enacted the necessary legislation (based on the OECD Model Rules) to implement Pillar Two in 2024. Ireland, in particular, enacted Pillar Two by signing Finance (No. 2) Bill 2023 into law in December 2023. Other countries and territories have indicated they will introduce Pillar Two beginning in 2025. While we do not anticipate that this legislation will have a material impact on our tax provision or effective tax rate, we continue to monitor evolving tax legislation in the jurisdictions in which we operate.

Fair Value of Financial Instruments

The Company has categorized its assets and liabilities that are measured at fair value on a recurring and non-recurring basis into a three-level fair value hierarchy, based on the reliability of the inputs used to determine fair value as follows:

•

Level 1: refers to fair values determined based on quoted market prices in active markets for identical assets;

•

Level 2: refers to fair values estimated using observable market-based inputs or unobservable inputs that are corroborated by market data; and

•

Level 3: includes fair values estimated using unobservable inputs that are not corroborated by market data.

The following methods and assumptions were used by the Company in estimating its fair value disclosure for financial instruments:

•

Mutual funds and exchange-traded funds are classified as Level 1 because we use quoted market prices in active markets in determining the fair value of these securities.

•

Commingled funds are not leveled within the fair value hierarchy as the funds are valued at the net value of shares held as reported by the manager of the funds. These funds are not exchange-traded.

•

Hedge funds are not leveled within the fair value hierarchy as the fair values for these investments are estimated based on the net asset values derived from the latest audited financial statements or most recent capital account statements provided by the funds’ investment manager or third-party administrator, as a practical expedient.

•

Market values for our derivative instruments have been used to determine the fair values of forward and option foreign exchange contracts based on estimated amounts the Company would receive or have to pay to terminate the agreements, taking into account observable information about the current foreign currency forward rates. Such financial instruments are classified as Level 2.

•

Contingent consideration payable is classified as Level 3, and we estimate fair value based on the likelihood and timing of achieving the relevant milestones of each arrangement, applying a probability assessment to each of the potential outcomes, which at times includes the use of a Monte Carlo simulation and discounting the probability-weighted payout. Typically, milestones are based on revenue or earnings growth for the acquired business.