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Derivative Instruments and Hedging Activities - Part 3 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Gain Loss By Type Of Derivative Tables
Gain (Losses) Recognized in AOCL	$ (144)	$ (16)
Gains (Losses) Reclassified from AOCL into Earnings	(22)	(31)
Gains (Losses) Recognized in Earnings (ineffective portion)	0	(1)
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	9	(25)
Interest rate derivatives [Member]
AOCI to be recognized in next 12 months table
Accumulated Other Comprehensive Income Loss Before Tax Expected Increase Decrease Next Twelve Months	(112)
Gain Loss By Type Of Derivative Tables
Gain (Losses) Recognized in AOCL	(150)	(13)
Interest rate derivatives [Member] | Interest Expense [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Reclassified from AOCL into Earnings	(31)	(32)
Gains (Losses) Recognized in Earnings (ineffective portion)	0	(1)
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	0	1
Interest rate derivatives [Member] | Non-regulated cost of sales [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Reclassified from AOCL into Earnings	(1)	(1)
Interest rate derivatives [Member] | Net Equity In Earnings Of Affiliates [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Reclassified from AOCL into Earnings	(1)	(2)
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	0	(6)
Cross currency derivatives [Member]
AOCI to be recognized in next 12 months table
Accumulated Other Comprehensive Income Loss Before Tax Expected Increase Decrease Next Twelve Months	(5)
Gain Loss By Type Of Derivative Tables
Gain (Losses) Recognized in AOCL	(3)	1
Cross currency derivatives [Member] | Interest Expense [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Reclassified from AOCL into Earnings	(1)	(3)
Cross currency derivatives [Member] | Foreign currency transaction gains (losses) [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Reclassified from AOCL into Earnings	(10)	5
Foreign currency derivatives [Member]
AOCI to be recognized in next 12 months table
Accumulated Other Comprehensive Income Loss Before Tax Expected Increase Decrease Next Twelve Months	2
Gain Loss By Type Of Derivative Tables
Gain (Losses) Recognized in AOCL	(15)	1
Foreign currency derivatives [Member] | Net Equity In Earnings Of Affiliates [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	(4)	(3)
Foreign currency derivatives [Member] | Foreign currency transaction gains (losses) [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Reclassified from AOCL into Earnings	7	2
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	23	6
Commodity derivatives [Member]
AOCI to be recognized in next 12 months table
Accumulated Other Comprehensive Income Loss Before Tax Expected Increase Decrease Next Twelve Months	1
Gain Loss By Type Of Derivative Tables
Gain (Losses) Recognized in AOCL	24	(5)
Commodity derivatives [Member] | Non-regulated cost of sales [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Reclassified from AOCL into Earnings	2	0
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	0	1
Commodity derivatives [Member] | Non-regulated revenue [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Reclassified from AOCL into Earnings	13	0
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	3	(8)
Commodity derivatives [Member] | Regulated Revenue [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	0	(3)
Commodity derivatives [Member] | Regulated Cost Of Sales [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	(8)	0
Commodity derivatives [Member] | Income (Loss) From Operations Of Discontinued Business [Member]
Gain Loss By Type Of Derivative Tables
Gains (Losses) Recognized in Earnings (not designated as hedging instruments)	$ (5)	$ (13)

X

- Definition

The pre-tax accumulated other comprehensive income (loss) expected to be recognized as an increase (decrease) to income from continuing operations before income taxes over the next twelve months as of the balance sheet date.

+ References

No definition available.

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- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and 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 (c)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959



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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

-Paragraph 4D

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- Definition

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ 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 (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-Subparagraph (a)(1),(2)

-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ 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 (b)

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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

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