Derivative Instruments (Fair Values of Derivative Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Assets:
Current	$ 331.1	$ 394.2
Long-term	1,496.4	2,102.5
Total	1,827.5	2,496.7
Liability:
Current	390.4	328.4
Long-term	1,192.3	1,042.3
Total	1,582.7	1,370.7
Cross-currency and interest rate derivative contracts
Assets:
Current	270.8	372.7
Long-term	886.4	1,370.1
Total	1,157.2	1,742.8
Liability:
Current	389.2	326.5
Long-term	1,192.3	1,042.2
Total	1,581.5	1,368.7
Total equity-related derivative instruments
Assets:
Current	55.2	13.9
Long-term	608.2	732.4
Total	663.4	746.3
Liability:
Current	0.0	1.4
Long-term	0.0	0.0
Total	0.0	1.4
Foreign currency forward and option contracts
Assets:
Current	4.6	7.2
Long-term	1.4	0.0
Total	6.0	7.2
Liability:
Current	1.2	0.5
Long-term	0.0	0.0
Total	1.2	0.5
Other
Assets:
Current	0.5	0.4
Long-term	0.4	0.0
Total	0.9	0.4
Liability:
Current	0.0	0.0
Long-term	0.0	0.1
Total	$ 0.0	$ 0.1