Contingencies - Paddock Enterprises, LLC (Details) - USD ($) $ in Millions			12 Months Ended
	Jul. 20, 2022	Jul. 18, 2022	Dec. 31, 2022	Mar. 31, 2023	Jul. 08, 2022	Mar. 31, 2022
Loss contingencies
Deconsolidation investing outflow	$ 8.5
Remaining assets			$ 9,061.0	$ 9,425.0		$ 8,877.0
Cash and cash equivalents			773.0	$ 480.0		519.0
Liability from deconsolidation						$ 625.0
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
Paddock
Loss contingencies
Remaining assets	18.0
Liabilities	30.0
Cash and cash equivalents	$ 12.0
Operating cash outflow			$ 621.0
Face value		$ 8.5