Contingencies - Paddock Enterprises, LLC (Details) - USD ($) $ in Millions			12 Months Ended
	Jul. 20, 2022	Jul. 18, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jul. 08, 2022	Jan. 06, 2020
Loss contingencies
Cash							$ 47.0
Loss for deconsolidation of Paddock					$ (14.0)
Deconsolidation investing outflow					47.0
Remaining assets			$ 9,061.0	$ 8,832.0	8,882.0
Cash and cash equivalents			773.0	725.0
Operating cash outflow			154.0	680.0	457.0
Liability from deconsolidation				625.0			$ 471.0
Funding to trust		$ 601.5
Funding to trust through borrowings		600.0
Funding to trust through cash		1.5
Total consideration ("Settlement Consideration")						$ 610.0
Estimated operating cash outflow			154.0	$ 687.0	$ 457.0
Paddock
Loss contingencies
Deconsolidation investing outflow	$ 8.5
Remaining assets	18.0
Liabilities	30.0
Cash and cash equivalents	$ 12.0
Operating cash outflow			$ 621.0
Face value		$ 8.5