Defined Benefit Plans - Schedule of Balance Sheet Information on Our Defined Benefit Plans (Details) - USD ($) $ in Millions |
12 Months Ended | |
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Dec. 31, 2025 |
Dec. 31, 2024 |
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Projected benefit obligation | $ (1,407.8) | $ (1,361.4) |
| Fair value of plan assets | 1,430.5 | 1,389.4 |
| Net pension asset | 22.7 | 28.0 |
| Defined benefit plan, indemnification asset. | 113.0 | 115.0 |
| Investments in UK Gilts | $ 24.0 | 23.0 |
| Benefit obligation, discount rate | 6.10% | |
| Defined benefit plan, adjustment to discount rate used to determine benefit obligations | 1.00% | |
| Impact of a 1.0% increase to discount rate | $ (34.0) | |
| Impact of 1.0% decrease to discount rate | 40.0 | |
| Level 1 | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets | 239.0 | 233.0 |
| Level 2 | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets | 132.0 | 135.0 |
| Level 3 | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets | $ 1,060.0 | $ 1,021.0 |
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- Definition Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Other Postretirement Benefit Obligation No definition available.
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- Definition Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Other Postretirement Benefit Obligation No definition available.
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- Definition Defined Benefit Plan, Indemnification Asset No definition available.
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- Definition Defined Benefit Plan, Investments in UK Gilts No definition available.
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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