XML 84 R64.htm IDEA: XBRL DOCUMENT v3.8.0.1
Derivatives and Hedge Accounting Activities (Selected Information Related to Losses on Cash Flow Hedges Included in AOCI) (Details)
$ in Millions
9 Months Ended
Sep. 30, 2017
USD ($)
Derivative Instruments, Gain (Loss) [Line Items]  
AOCI After-Tax $ (254)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax (11)
Commodity | Gas  
Derivative Instruments, Gain (Loss) [Line Items]  
AOCI After-Tax (1)
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (1)
Maximum Term 37 months
Commodity | Electricity  
Derivative Instruments, Gain (Loss) [Line Items]  
AOCI After-Tax $ 7
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ 7
Maximum Term 15 months
Commodity | Other Energy Contract  
Derivative Instruments, Gain (Loss) [Line Items]  
AOCI After-Tax $ (4)
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (4)
Maximum Term 6 months
Interest rate  
Derivative Instruments, Gain (Loss) [Line Items]  
AOCI After-Tax $ (260)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (11)
Maximum Term 387 months
Foreign currency  
Derivative Instruments, Gain (Loss) [Line Items]  
AOCI After-Tax $ 4
Foreign currency, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax $ (2)
Maximum Term 105 months