Comprehensive Income And Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions	3 Months Ended					9 Months Ended
	Sep. 30, 2011		Jun. 30, 2011	Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Net Income (Loss)	$ 470			$ 666		$ 1,424		$ 894
Foreign currency translation adjustments	(246)			92		(150)		57
Pension and OPEB related adjustments to AOCI	1	[1]		4	[2]	(6)	[3]	19	[3]
Net unrealized gain (loss) on cash flow hedges	(47)	[4]		1	[1]	(52)	[5]	(9)	[5]
Reclassification into earnings from cash flow hedges	1	[1]				(3)	[6]	(2)	[6]
Unrealized gain on investments in auction rate securities	3	[2]		2	[1]	7	[7]	8	[7]
Other comprehensive income, net of tax	(288)			99
Total comprehensive income (loss)	182			765		1,226		971
Pension and OPEB related adjustments to AOCI, tax benefit (expense)				(5)		3		(5)
Net unrealized gains (losses) on cash flow hedges, tax benefit (expense)			26			28		3
Reclassification into earnings from cash flow hedges, tax benefit (expense)						(1)
Unrealized gain on investments in auction rate securities, tax benefit (expense)			5			(6)		(4)
Common Stockholders' Equity [Member]
Net Income (Loss)	472			670		1,418		893
Foreign currency translation adjustments	(235)			88		(142)		58
Pension and OPEB related adjustments to AOCI	1	[1]		4	[2]	(6)	[3]	19	[3]
Net unrealized gain (loss) on cash flow hedges	(47)	[4]		1	[1]	(52)	[5]	(9)	[5]
Reclassification into earnings from cash flow hedges	1	[1]				(3)	[6]	(2)	[6]
Unrealized gain on investments in auction rate securities	3	[2]		2	[1]	7	[7]	8	[7]
Other comprehensive income, net of tax	(277)			95
Total comprehensive income (loss)	195			765		1,228		971
Noncontrolling Interests [Member]
Net Income (Loss)	(2)			(4)		6		1
Foreign currency translation adjustments	(11)			4		(8)		(1)
Pension and OPEB related adjustments to AOCI					[2]
Net unrealized gain (loss) on cash flow hedges		[4]			[1]
Reclassification into earnings from cash flow hedges		[1]
Unrealized gain on investments in auction rate securities		[2]			[1]
Other comprehensive income, net of tax	(11)			4
Total comprehensive income (loss)	$ (13)					$ (2)

[1] Net of insignificant tax expense.

[2] Net of $5 million tax expense.

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

[4] Net of $26 million tax benefit.

[5] Net of $28 tax benefit in 2011 and $3 tax benefit in 2010.

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

[7] Net of $6 tax expense in 2011 and $4 tax expense in 2010.