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Derivative Instruments and Hedging Activities (Derivative Instruments Not Designated for Hedge Accounting) (Details) (Not Designated as Hedging Instrument, USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | $ 29 | $ (149) | $ (20)
Interest Rate Contract | Interest Expense |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | (1) | (5) | (4)
Interest Rate Contract | Net Equity In Earnings Of Affiliates |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | (6) | 0 | 0
Foreign Exchange Contract | Net Equity In Earnings Of Affiliates |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | (24) | 0 | 0
Foreign Exchange Contract | Foreign Currency Gain (Loss) |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | 64 | (141) | 60
Other Contract | Sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | 11 | 24 | 13
Other Contract | Regulated Revenue |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | 0 | (10) | 1
Other Contract | Cost of Sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | 1 | 2 | (9)
Other Contract | Regulated Cost Of Sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | 2 | (15) | (5)
Other Contract | Income (Loss) From Operations Of Discontinued Business |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Losses) Recognized in Earnings, Not Designated as Hedge Accounting | $ (18) | $ (4) | $ (76)

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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