Other Assets (Other Assets) (Details) - USD ($) $ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Other Assets | ||
| Investments | $ 469.4 | $ 281.4 |
| Operating right-of-use lease assets | 238.1 | 275.1 |
| Deferred compensation plan | 112.7 | 100.6 |
| Deferred contract costs and sales commissions | 82.5 | 80.2 |
| Reinsurance receivable | 92.1 | 84.1 |
| Derivative and hedging assets | 74.1 | 105.8 |
| Prepaid fees and capitalized implementation costs for cloud-based hosting arrangements | 67.6 | 51.4 |
| Amounts recoverable for capping, closure and post-closure obligations | 21.9 | 20.5 |
| Deferred financing costs | 3.6 | 5.1 |
| Other | 21.9 | 21.3 |
| Total | $ 1,183.9 | $ 1,025.5 |
| Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | Total | Total |
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- Definition Deferred Contract Costs And Sales Commissions No definition available.
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- Definition Other noncurrent assets. No definition available.
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- Definition Prepaid Fees And Capitalized Implementation Costs, Noncurrent No definition available.
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- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Indicates line item in statement of financial position that includes operating lease right-of-use asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of noncurrent assets classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of long-term investments classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount due from parties in nontrade transactions, classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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