Quarterly report pursuant to Section 13 or 15(d)

Debt (Interest Rate Swaps) (Details)

v3.5.0.2
Debt (Interest Rate Swaps) (Details) - USD ($)
Sep. 30, 2016
Feb. 29, 2016
Interest Rate Swap    
Debt Instrument [Line Items]    
Notional amount of interest rate swap agreements $ 2,350,000,000  
Average variable rate, interest rate swap agreements (percent) 3.88%  
Weighted average rate, interest rate swap agreements (percent) 4.69%  
June 1, 2017 Expiration, Interest Rate Swap    
Debt Instrument [Line Items]    
Notional amount of interest rate swap agreements $ 250,000,000  
LIBOR plus 4.22%, Interest Rate Swap    
Debt Instrument [Line Items]    
Notional amount of interest rate swap agreements   $ 600,000,000
May 15, 2022 Expiration, Interest Rate Swap    
Debt Instrument [Line Items]    
Notional amount of interest rate swap agreements $ 500,000,000  
LIBOR plus 4.44%, Interest Rate Swap    
Debt Instrument [Line Items]    
Notional amount of interest rate swap agreements   $ 1,000,000,000