Derivative Instruments (Narrative) (Details)			3 Months Ended		9 Months Ended
	Sep. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)	Sep. 30, 2014 Cross-currency and interest rate derivative contracts USD ($)	Sep. 30, 2013 Cross-currency and interest rate derivative contracts USD ($)	Sep. 30, 2014 Cross-currency and interest rate derivative contracts USD ($)	Sep. 30, 2013 Cross-currency and interest rate derivative contracts USD ($)	Dec. 31, 2013 Cross-currency and interest rate derivative contracts USD ($)	Sep. 30, 2014 Counterparty Credit Risk [Member] USD ($)	Jul. 30, 2014 ITV Collar [Member] USD ($)	Jul. 30, 2014 ITV Collar [Member] GBP (£)
Derivative [Line Items]
Number of common stock shares owned (in shares)									259,820,065	259,820,065
Valuation adjustment in asset cross currency and interest rate derivative contracts			$ 25,200,000		$ 25,200,000		$ 9,800,000
Valuation adjustment in liability cross currency and interest rate derivative contracts			102,200,000		102,200,000		173,000,000
Gain (loss) in changes in the credit risk valuation adjustments associated with our cross-currency and interest rate derivative contracts			(31,200,000)	85,100,000	(80,100,000)	39,600,000
Derivative assets	1,528,200,000	1,204,200,000	1,067,800,000		1,067,800,000		769,200,000	780,900,000
Principal amount of debt									$ 764,500,000	£ 446,900,000
Derivative Interest Rate									0.00%	0.00%
Implied yield									1.73%	1.73%
Shares needed to borrow from custody account to hedge exposure									205,000,000	205,000,000