Derivative Instruments and Hedging Activities (Details 1) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets
Current assets	$ 7	$ 12
Liabilities
Current liabilities	5	6
Foreign Currency Contract [Member]
Notional Amount
Notional Amount	143	108
Assets
Current assets	5	8
Forward Contract [Member]
Notional Amount
Notional Amount	67	76
Assets
Current assets	1	1
Liabilities
Current liabilities	1	2
Current liabilities		1
Commodity Contract [Member]
Notional Amount
Notional Amount	50	67
Assets
Current assets	1	2
Liabilities
Current liabilities	$ 4	$ 4