Restructuring Related Activities Plan Optimization (Details) (USD $) In Millions	3 Months Ended	9 Months Ended	32 Months Ended
	Sep. 30, 2011	Sep. 30, 2011	Sep. 30, 2011
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	$ 24	$ 92	$ 201
Cumulative restructuring charges			296
Plant Network Optimization [Member] | Minimum [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	130
Restructuring plan estimated future cash outflow	110
Plant Network Optimization [Member] | Minimum [Member] | Restructuring Plan [Member] | Termination Benefits [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	35
Plant Network Optimization [Member] | Minimum [Member] | Restructuring Related To Plan [Member] | Accelerated depreciation [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	20
Plant Network Optimization [Member] | Minimum [Member] | Restructuring Related To Plan [Member] | Transfer costs [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	75
Plant Network Optimization [Member] | Maximum [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	145
Restructuring plan estimated future cash outflow	120
Plant Network Optimization [Member] | Maximum [Member] | Restructuring Plan [Member] | Termination Benefits [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	40
Plant Network Optimization [Member] | Maximum [Member] | Restructuring Related To Plan [Member] | Accelerated depreciation [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	25
Plant Network Optimization [Member] | Maximum [Member] | Restructuring Related To Plan [Member] | Transfer costs [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	80
Plant Network Optimization [Member] | Termination Benefits [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	1	2	2
Termination Benefits [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	10	36	82
Plant Network Optimization [Member] | Transfer costs [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	5	20	60
Transfer costs [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	5	20	60
Plant Network Optimization [Member] | Other [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives
Other [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	9	36	59
Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	6	22	62
Cumulative restructuring charges			$ 115