Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Debt (Senior Secured Notes Narrative) (Details)

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Debt (Senior Secured Notes Narrative) (Details)
12 Months Ended
Dec. 31, 2016
USD ($)
entity
Dec. 31, 2015
USD ($)
Aug. 20, 2010
USD ($)
Debt Instrument [Line Items]      
Long-term Debt $ 27,716,999,000 $ 29,641,863,000  
Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Face amount     $ 3,900,000,000
Prepayment penalty percentage 1.00%    
Number of subsidiaries that have guaranteed the debt | entity 2    
6.5% Senior Secured Bonds, Due September 2014 [Member]      
Debt Instrument [Line Items]      
Face amount     $ 1,350,000,000
Stated interest rate     6.50%
Maturity date of facility Sep. 01, 2014    
6.75% Senior Secured Bonds, Due September 2016 [Member]      
Debt Instrument [Line Items]      
Face amount     $ 1,275,000,000
Stated interest rate     6.75%
Maturity date of facility Sep. 01, 2016    
7.125% Senior Secured Bonds, Due September 2018 [Member]      
Debt Instrument [Line Items]      
Face amount     $ 1,275,000,000
Stated interest rate     7.125%
Maturity date of facility Sep. 01, 2018    
Base Rate [Member] | Senior Secured Notes [Member]      
Debt Instrument [Line Items]      
Spread over reference rate 0.50%