Derivative Instruments (Fair Values of Derivative Assets and Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Asset
Current	$ 116.1	$ 234.6
Long-term	394.2	650.1
Total	510.3	884.7
Liabilities
Current	185.1	252.7
Long-term	509.0	1,364.1
Total	694.1	1,616.8
Cross-currency and interest rate derivative contracts
Asset
Current	108.9	148.8
Long-term	279.6	418.4
Total	388.5	567.2
Liabilities
Current	154.0	171.2
Long-term	509.0	1,364.1
Total	663.0	1,535.3
Equity-related derivative instruments:
Asset
Current	0.0	49.3
Long-term	114.4	231.6
Total	114.4	280.9
Foreign currency forward and option contracts
Asset
Current	5.9	36.5
Long-term	0.2	0.1
Total	6.1	36.6
Liabilities
Current	31.1	81.5
Long-term	0.0	0.0
Total	31.1	81.5
Other
Asset
Current	1.3	0.0
Long-term	0.0	0.0
Total	$ 1.3	$ 0.0