Restructuring Level 4 (Details) - Restructuring by Type (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Restructuring Cost and Reserve [Line Items]
Expected savings of in-process cost reduction programs			$ 24
Business realignment costs	3	5	18	8
Restructuring costs expected to be incurred			35
Cumulative restructuring costs, Incurred to Date			19
Restructuring Reserve [Roll Forward]
Accrued liability, Beginning Balance			6
Restructuring charges	1		13
Payments			(7)
Accrued liability, Ending Balance	12		12
Workforce reductions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs expected to be incurred			28
Cumulative restructuring costs, Incurred to Date			15
Restructuring Reserve [Roll Forward]
Accrued liability, Beginning Balance			6
Restructuring charges			9
Payments			(3)
Accrued liability, Ending Balance	12		12
Site closure costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs expected to be incurred			6
Cumulative restructuring costs, Incurred to Date			4
Restructuring Reserve [Roll Forward]
Accrued liability, Beginning Balance			0
Restructuring charges			4
Payments			(4)
Accrued liability, Ending Balance	0		0
Other projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs expected to be incurred			1
Cumulative restructuring costs, Incurred to Date			0
Restructuring Reserve [Roll Forward]
Accrued liability, Beginning Balance			0
Restructuring charges			0
Payments			0
Accrued liability, Ending Balance	$ 0		$ 0
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring activities will occur over the next (in months)			12
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring activities will occur over the next (in months)			15