Fair Value of Financial Assets and Liabilities, Recurring (Details) (Fair Value, Measurements, Recurring [Member], Significant Other Observable Inputs (Level 2) [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Foreign exchange contracts-forwards	$ 28	$ 58
Deferred compensation investments in cash surrender life insurance	76	69
Deferred compensation investments in mutual funds	24	23
Total	128	150
Liabilities:
Foreign exchange contracts-forwards	11	31
Deferred compensation plan liabilities	106	97
Total	$ 117	$ 128