Restructuring Related Activities Plan Optimization (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	36 Months Ended
	Dec. 31, 2011	Dec. 31, 2011
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	$ 114	$ 223
Cumulative restructuring charges		318
Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	30	70
Cumulative restructuring charges		124
Termination Benefits [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	45	90
Termination Benefits [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	3	3
Transfer costs [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	27	67
Transfer costs [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	27	67
Other [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives	42	66
Other [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Cash payments associated with restructuring initiatives
Minimum [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	130
Restructuring plan estimated future cash outflow	110
Minimum [Member] | Restructuring Plan [Member] | Termination Benefits [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	35
Minimum [Member] | 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	20
Minimum [Member] | 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
Maximum [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	145
Restructuring plan estimated future cash outflow	120
Maximum [Member] | Restructuring Plan [Member] | Termination Benefits [Member] | Plant Network Optimization [Member]
Restructuring and Related Cost [Line Items]
Expected total costs associated with the plan	40
Maximum [Member] | 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	25
Maximum [Member] | 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	$ 80