Derivative Instruments (Realized and Unrealized Gains (Losses) on Derivatives) (Schedule and Footnotes) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative [Line Items]
Gain (loss) on derivative instruments, net	$ 177.1	$ 546.9	$ 193.8	$ 1,668.8
Equity-related derivative instruments
Derivative [Line Items]
Gain (loss) on derivative instruments, net	(22.0)	0.0	145.0	0.0
Cross-currency and interest rate derivative contracts
Derivative [Line Items]
Gain (loss) on derivative instruments, net	195.1	549.3	38.8	1,640.6
Foreign currency forward and option contracts
Derivative [Line Items]
Gain (loss) on derivative instruments, net	4.0	(2.4)	10.0	28.9
Other
Derivative [Line Items]
Gain (loss) on derivative instruments, net	$ 0.0	$ 0.0	$ 0.0	$ (0.7)