v2.4.0.8
Derivative Instruments (Textuals) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Parent [Member]
Dec. 31, 2013
Parent [Member]
Sep. 30, 2014
Noncontrolling Interest [Member]
Dec. 31, 2013
Noncontrolling Interest [Member]
Derivatives, Fair Value [Line Items]                
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax $ 0 $ 7 $ 0 $ 4        
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax         145 148 12 11
Derivative Instruments (Textuals) [Abstract]                
Maximum length of time hedging using interest rate derivative instruments     9 years          
Derivative, Net Liability Position, Aggregate Fair Value 15   15          
Collateral Already Posted, Aggregate Fair Value 8   8          
Additional Collateral, Aggregate Fair Value 0   0          
(Gain) Loss on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net 0 7 10 7        
Cash Flow Hedge (Gain) Loss to be Reclassified within Twelve Months     $ 46