Benefit Obligations Benefit Obligations (Schedule of Company's Pension and Post Retirement Benefit Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Amounts recognized in accumulated other comprehensive income consist of
Net amount recognized	$ 180		$ 63		$ 97
Other comprehensive (income) loss, tax effect	203		93
Pension Benefits [Member]
Change in projected benefit obligation
Projected benefit obligation at beginning of period	3,533		3,342
Service cost	28		30		29
Interest cost	182		188		193
Participant contributions	0		0
Plan amendments	(3)		0
Net actuarial (gain) loss	274	[1]	210	[1]
Divestitures	0		0
Settlements	(1)		0
Benefits paid	(236)	[2]	(227)	[2]
Federal subsidy on Medicare Part D	0		0
Curtailments	(1)		(3)
Exchange rate changes	(15)		(7)
Projected benefit obligation at end of period	3,761		3,533		3,342
Change in plan assets
Fair value of plan assets at beginning of period	2,460		2,329
Actual return on plan assets	169		308
Employer contributions	181	[2]	52	[2]
Participant contributions	0		0
Divestitures	0		0
Settlements	0		0
Benefits paid	(236)	[2]	(227)	[2]
Exchange rate changes	(12)		(2)
Fair value of plan assets at end of period	2,562		2,460		2,329
Funded status and net amounts recognized
Funded Status, end of period	(1,199)		(1,073)
Amounts recognized in the consolidated balance sheets consist of
Noncurrent Other assets	27		18
Current Other liabilities	(22)		(22)
Benefit obligations	(1,204)		(1,069)
Net amount recognized	(1,199)		(1,073)
Amounts recognized in accumulated other comprehensive income consist of
Net actuarial (gain) loss	994	[3]	720	[3]
Prior service (benefit) cost	7		6
Net amount recognized	1,001	[3]	726	[3]
Benefits paid	(236)	[2]	(227)	[2]
Postretirement Benefits [Member]
Change in projected benefit obligation
Projected benefit obligation at beginning of period	282		281
Service cost	1		1		1
Interest cost	13		15		17
Participant contributions	21		22
Plan amendments	0		0
Net actuarial (gain) loss	13	[1]	11	[1]
Divestitures	0		0
Settlements	0		0
Benefits paid	(53)	[2]	(56)	[2]
Federal subsidy on Medicare Part D	4		7
Curtailments	0		0
Exchange rate changes	0		1
Projected benefit obligation at end of period	281		282		281
Change in plan assets
Fair value of plan assets at beginning of period	0		0
Actual return on plan assets	0		0
Employer contributions	32	[2]	34	[2]
Participant contributions	21		22
Divestitures	0		0
Settlements	0		0
Benefits paid	(53)	[2]	(56)	[2]
Exchange rate changes	0		0
Fair value of plan assets at end of period	0		0		0
Funded status and net amounts recognized
Funded Status, end of period	(281)		(282)
Amounts recognized in the consolidated balance sheets consist of
Noncurrent Other assets	0		0
Current Other liabilities	(25)		(27)
Benefit obligations	(256)		(255)
Net amount recognized	(281)		(282)
Amounts recognized in accumulated other comprehensive income consist of
Net actuarial (gain) loss	(35)	[3]	(50)	[3]
Prior service (benefit) cost	1		1
Net amount recognized	(34)	[3]	(49)	[3]
Benefits paid	(53)	[2]	(56)	[2]
Equity Method Investee Pension Plans and Postretirement Benefit Plans [Member]
Amounts recognized in accumulated other comprehensive income consist of
Net actuarial gain (loss) from equity method investee	1		1
Nonqualified Pension Benefits [Member]
Change in projected benefit obligation
Benefits paid	20		20
Change in plan assets
Benefits paid	20		20
Amounts recognized in accumulated other comprehensive income consist of
Benefits paid	$ 20		$ 20

[1] Primarily relates to change in discount rates.

[2] Included in pension benefits are contributions to and benefit payments from nonqualified trusts related to nonqualified pension plans of $20 million and $20 million as of December 31, 2011 and 2010.

[3] Amount includes $1 million and $1 million as of December 31, 2011 and 2010, respectively, related to the Company's equity method investments. Amount shown net of tax of $203 million and $93 million as of December 31, 2011 and 2010, respectively, in the consolidated statements of equity (Note 16).