Derivative Instruments (Fair Values of Derivative Assets and Liabilities) (Schedule and Footnotes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets:
Current	$ 252.1	$ 193.3
Long-term	952.1	1,065.1
Total	1,204.2	1,258.4
Liability:
Current	751.2	569.9
Long-term	2,305.3	2,160.6
Total	3,056.5	2,730.5
Cross-currency and interest rate derivative contracts [Member]
Assets:
Current	248.4	191.3
Long-term	520.8	467.1
Total	769.2	658.4
Liability:
Current	727.2	543.2
Long-term	2,191.4	2,156.3
Total	2,918.6	2,699.5
Valuation adjustment in asset cross currency and interest rate derivative contracts	9.8	17.2
Valuation adjustment in liability cross currency and interest rate derivative contracts	173.0	156.5
Gain (loss) on change in credit risk valuation included in realized and unrealized gains (losses) on derivative instruments, net	15.3	(57.3)	42.9
Equity-related derivative instruments [Member]
Assets:
Current	0	0
Long-term	430.4	594.6
Total	430.4	594.6
Liability:
Current	15.6	21.6
Long-term	101.3	0
Total	116.9	21.6
Foreign currency forward contracts [Member]
Assets:
Current	2.6	0.7
Long-term	0	0.4
Total	2.6	1.1
Liability:
Current	8.2	4.5
Long-term	12.0	3.6
Total	20.2	8.1
Other Contract [Member]
Assets:
Current	1.1	1.3
Long-term	0.9	3.0
Total	2.0	4.3
Liability:
Current	0.2	0.6
Long-term	0.6	0.7
Total	$ 0.8	$ 1.3