Restructuring Related Activities Plan Optimization (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		50 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013
Restructuring and Related Cost [Line Items]
Restructuring Charges	$ 10	$ 10	$ 365
Cash payments associated with restructuring initiatives	47		422
Cumulative restructuring charges			490
Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	130
Cash payments associated with restructuring initiatives	1		103
Cumulative restructuring charges			129
Impairment of an asset in value [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges	(17)
Termination Benefits [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges	8	(1)
Cash payments associated with restructuring initiatives	23		204
Termination Benefits [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges	(2)
Cash payments associated with restructuring initiatives	1		30
Accelerated depreciation [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges
Transfer costs [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges
Cash payments associated with restructuring initiatives	0		73
Transfer costs [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	0		73
Other [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges	19	11
Cash payments associated with restructuring initiatives	24		145
Other [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives
Restructuring Plan [Member] | Termination Benefits [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	33
Restructuring Related To Plan [Member] | Accelerated depreciation [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	22
Restructuring Related To Plan [Member] | Transfer costs [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	75
Minimum [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Restructuring plan estimated future cash outflow	105
Maximum [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Restructuring plan estimated future cash outflow	$ 110