XML 116 R98.htm IDEA: XBRL DOCUMENT v3.8.0.1
Long-Term Debt (Other Debt and Interest Payments Narrative) (Details)
12 Months Ended
Dec. 31, 2017
USD ($)
item
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]      
Interest Paid on borrowing $ 852,000,000 $ 930,000,000 $ 925,000,000
Interest Rate Swap [Member]      
Debt Instrument [Line Items]      
Derivative Liability, Number of Instruments Held | item 8    
Interest Rate Swap, Currently Effective [Member]      
Debt Instrument [Line Items]      
Notional Amount, Liability $ 2,200,000,000    
Credit Facility, Revolving Credit Loans [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
Derivative, Basis Spread on Variable Rate 2.50%    
Secured Debt [Member] | Credit Facility, Term Loan G [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
Derivative, Basis Spread on Variable Rate 2.75%    
Secured Debt [Member] | Credit Facility, Term Loan G [Member] | Alternate Base Rate [Member]      
Debt Instrument [Line Items]      
Derivative, Basis Spread on Variable Rate 1.75%    
Secured Debt [Member] | Credit Facility, Term Loan H [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
Derivative, Basis Spread on Variable Rate 3.00%    
Secured Debt [Member] | Credit Facility, Term Loan H [Member] | Alternate Base Rate [Member]      
Debt Instrument [Line Items]      
Derivative, Basis Spread on Variable Rate 2.00%    
Secured Debt [Member] | Credit Facility, Term Loan G and Term Loan H [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
Derivative, Floor Interest Rate 1.00%    
Secured Debt [Member] | Credit Facility, Term Loan G and Term Loan H [Member] | Alternate Base Rate [Member]      
Debt Instrument [Line Items]      
Derivative, Floor Interest Rate 2.00%