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Segment Reporting - Reconciliation of Reportable Segment ROA Pre-Tax Profit to Consolidated Income before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Income before income taxes	$ 1,508.1	$ 1,522.0	$ 1,440.0
U.S. reportable segment
Segment Reporting Information [Line Items]
U.S. ROA pre-tax profit	1,303.2	1,318.2	1,254.2
Other operating segment
Segment Reporting Information [Line Items]
Other operating segment pre-tax profit	$ 204.9	$ 203.8	$ 185.8

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- Definition

Segment Reporting, Other Operating Segment Item, ROA Pre-Tax Profit

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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