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Income Taxes - Uncertain Income Tax Positions (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Balance at beginning of year | $ 46.1 | $ 41.9 | $ 76.2
Increases related to positions taken in the current year | 2.4 | 4.8 | 2.4
Increases and decreases related to positions taken in prior years | 3.5 | 2.9 |
Increases and decreases related to positions taken in prior years | (26.4) |  |
Decreases related to lapse of statutes of limitations | (0.8) | (3.5) | (10.3)
Settlements during the current year | 0.0 | 0.0 | 0.0
Decreases for tax positions on dispositions | 0.0 | 0.0 | 0.0
Balance at end of year | 51.2 | 46.1 | 41.9
Offsetting non-current deferred tax asset | $ 12.9 | $ 12.8 | $ 14.4

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10B -Publisher FASB -URI https://asc.fasb.org//1943274/2147482525/740-10-45-10B + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A + Details
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