Fair Value Measurements (Details 1) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis
Properties, plant and equipment, net (held for sale)	$ 0	$ 0
Properties, plant and equipment, net (held and sale)	42	42
Investments and advances	0	0
Total Assets at Fair Value	42	42
Properties, plant and equipment, net (held and used) before tax loss	50	50
Properties, plant and equipment, net (held and sale) before tax loss	0	10
Investments and advances before tax loss	1	3
Assets fair value before tax loss	51	63
Level 1 [Member]
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis
Properties, plant and equipment, net (held for sale)	0	0
Properties, plant and equipment, net (held and sale)	0	0
Investments and advances	0	0
Total Assets at Fair Value	0	0
Level 2 [Member]
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis
Properties, plant and equipment, net (held for sale)	0	0
Properties, plant and equipment, net (held and sale)	0	0
Investments and advances	0	0
Total Assets at Fair Value	0	0
Level 3 [Member]
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis
Properties, plant and equipment, net (held for sale)	0	0
Properties, plant and equipment, net (held and sale)	42	42
Investments and advances	0	0
Total Assets at Fair Value	$ 42	$ 42