Equity (Share Repurchases Programs) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Total cost for stock purchased pursuant to repurchase programs	$ 101.7
Class A
Class of Stock [Line Items]
Total cost for stock purchased pursuant to repurchase programs	$ 1,505.9	$ 1,702.6	$ 1,581.1
Class A | Class A
Class of Stock [Line Items]
Shares purchased pursuant to repurchase programs (in shares)	1,444,000	3,856,700	8,445,800
Average price paid per share pursuant to repurchase programs (in dollars per shares)	$ 18.24	$ 21.55	$ 27.31
Class C | Class A
Class of Stock [Line Items]
Shares purchased pursuant to repurchase programs (in shares)	78,452,085	69,381,968	49,604,048
Average price paid per share pursuant to repurchase programs (in dollars per shares)	$ 18.86	$ 23.34	$ 27.23