Condensed Consolidated Statements of Equity and Comprehensive Income (USD $) In Millions, except Share data		Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Deficit) [Member]	Foreign Currency Adjustments [Member]	Net Gains (Losses) on Cash Flow Hedges [Member]	Other [Member]	Pension and OPEB Related Adjustments to AOCI [Member]	Common Stockholders' Equity [Member]	Noncontrolling Interests [Member]	Total
Balance at Dec. 31, 2009		$ 1	$ 20,661	$ 1,460	$ 17	$ (22)	$ (31)	$ (336)	$ 21,750	$ 136	$ 21,886
Balance (in shares) at Dec. 31, 2009		1,309,000,000
Net income (loss)				223					223	5	228
Other Comprehensive Income (Loss)
Foreign currency translation adjustments					(30)				(30)	(5)	(35)
Pension and OPEB related adjustments to AOCI	[1]							15	15		15
Net unrealized gains (losses) on cash flow hedges	[2]					(10)			(10)		(10)
Reclassification into earnings from cash flow hedges	[3]					2			2		2
Unrealized gain on investments of auction rate securities	[4]						6		6		6
Total Comprehensive Income (Loss)									206		206
Common stock issuances, including dividend reinvestment and employee benefits			128						128		128
Common stock issuances, including dividend reinvestment and employee benefits (in shares)		9,000,000
Common stock dividends				(957)					(957)		(957)
Balance at Jun. 30, 2010		1	20,789	726	(13)	(30)	(25)	(321)	21,127	136	21,263
Balance (in shares) at Jun. 30, 2010		1,318,000,000
Balance at Mar. 31, 2010
Net income (loss)									(222)	5	(217)
Other Comprehensive Income (Loss)
Foreign currency translation adjustments									(12)	(1)	(13)
Pension and OPEB related adjustments to AOCI	[5]								2		2
Net unrealized gains (losses) on cash flow hedges	[6]								(10)		(10)
Reclassification into earnings from cash flow hedges	[7]								(1)		(1)
Unrealized gain on investments of auction rate securities	[8]								3		3
Total Comprehensive Income (Loss)									(238)	4	(234)
Balance at Jun. 30, 2010									21,127	136	21,263
Balance at Dec. 31, 2010		1	21,023	1,496	97	(18)	(17)	(60)	22,522	131	22,653
Balance (in shares) at Dec. 31, 2010		1,329,000,000									1,329,000,000
Net income (loss)				946					946	8	954
Other Comprehensive Income (Loss)
Foreign currency translation adjustments					93				93	3	96
Pension and OPEB related adjustments to AOCI	[1]							(7)	(7)		(7)
Net unrealized gains (losses) on cash flow hedges	[2]					(5)			(5)		(5)
Reclassification into earnings from cash flow hedges	[3]					2			2		2
Unrealized gain on investments of auction rate securities	[4]						4		4		4
Total Comprehensive Income (Loss)									1,033	11	1,044
Common stock issuances, including dividend reinvestment and employee benefits			22						22		22
Common stock issuances, including dividend reinvestment and employee benefits (in shares)		3,000,000
Common stock dividends				(994)					(994)		(994)
Changes in noncontrolling interest in subsidiaries	[9]									(23)	(23)
Balance at Jun. 30, 2011		1	21,045	1,448	190	(21)	(13)	(67)	22,583	119	22,702
Balance (in shares) at Jun. 30, 2011		1,332,000,000									1,332,000,000
Balance at Mar. 31, 2011
Net income (loss)									435	6	441
Other Comprehensive Income (Loss)
Foreign currency translation adjustments									62	3	65
Pension and OPEB related adjustments to AOCI	[10]								2		2
Net unrealized gains (losses) on cash flow hedges	[6]								(7)		(7)
Reclassification into earnings from cash flow hedges	[5]								(1)		(1)
Unrealized gain on investments of auction rate securities	[11]								1		1
Total Comprehensive Income (Loss)									494	9	503
Balance at Jun. 30, 2011									$ 22,583	$ 119	$ 22,702
Balance (in shares) at Jun. 30, 2011											1,332,000,000

[1] Net of $3 tax benefit in 2011 and $5 tax expense in 2010.

[2] Net of $2 tax benefit in 2011 and $3 tax benefit in 2010.

[3] Net of $1 tax expense in 2011 and insignificant tax benefit in 2010.

[4] Net of $1 tax expense in 2011 and $4 tax expense in 2010.

[5] Net of $1 million tax expense.

[6] Net of $3 million tax benefit.

[7] Net of insignificant tax benefit.

[8] Net of $2 million tax expense.

[9] Includes $18 in cash distributions to noncontrolling interests.

[10] Net of insignificant tax expense.

[11] Net of $2 million tax benefit.