Derivative Instruments and Hedging Activities (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Current assets	$ 10	$ 12
Liabilities
Current liabilities	6	6
Foreign Currency Contract [Member]
Notional Amount
Notional Amount	114	108
Assets
Current assets	4	8
Liabilities
Current liabilities	3
Forward Contract [Member]
Notional Amount
Notional Amount	71	76
Assets
Current assets	1	1
Liabilities
Current liabilities	2	2
Current liabilities		1
Commodity Contract [Member]
Notional Amount
Notional Amount	53	67
Assets
Current assets	5	2
Liabilities
Current liabilities	$ 1	$ 4