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SEGMENT INFORMATION - Reportable Segment Revenue, Income (Loss) Before Income Taxes, (Provision) Benefit for Income Taxes and Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information
Total revenues	$ 4,163.4	$ 3,412.8	$ 12,153.1	$ 9,992.3
Income before income taxes	257.2	224.1	779.6	594.4
U.S.
Segment Reporting Information
Total revenues	3,484.3	2,662.4	10,012.8	7,991.6
Income before income taxes	231.5	195.5	703.8	532.1
U.K.
Segment Reporting Information
Total revenues	679.1	750.4	2,140.3	2,000.7
Income before income taxes	$ 25.7	$ 28.7	$ 75.9	$ 62.3

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- Definition

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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