Employee Benefit Plans (Details 7) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	$ 433	$ 416	$ 346
Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	526	474	248
Cash and Cash Equivalents [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	6	95
Cash and Cash Equivalents [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	1	31
Fixed Income [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	96	99
Non-U.S. Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	104	93
Non-U.S. Equity [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	179	174
U.S Equity | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	104	61
Hedge Funds [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	110	0
U.S. Small Cap Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	50
Real Estate Funds [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	5	14
Real Estate Funds [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	19	19
Real Estate Investment Trust Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	8	4
Asset Allocation [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	102	80
Bonds - U.K. - Corporate [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	56	40
Bonds - U.K. - Government [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	154	114
Insurance contracts [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	15	16
Fair Value Inputs Level 1 [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Cash and Cash Equivalents [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Cash and Cash Equivalents [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Fixed Income [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Non-U.S. Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Non-U.S. Equity [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | U.S Equity | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Hedge Funds [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | U.S. Small Cap Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Real Estate Funds [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Real Estate Funds [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Real Estate Investment Trust Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Asset Allocation [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Bonds - U.K. - Corporate [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Bonds - U.K. - Government [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 1 [Member] | Insurance contracts [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 2 [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	318	402
Fair Value Inputs Level 2 [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	492	439
Fair Value Inputs Level 2 [Member] | Cash and Cash Equivalents [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	6	95
Fair Value Inputs Level 2 [Member] | Cash and Cash Equivalents [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	1	31
Fair Value Inputs Level 2 [Member] | Fixed Income [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	96	99
Fair Value Inputs Level 2 [Member] | Non-U.S. Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	104	93
Fair Value Inputs Level 2 [Member] | Non-U.S. Equity [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	179	174
Fair Value Inputs Level 2 [Member] | U.S Equity | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	104	61
Fair Value Inputs Level 2 [Member] | Hedge Funds [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 2 [Member] | U.S. Small Cap Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	50
Fair Value Inputs Level 2 [Member] | Real Estate Funds [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 2 [Member] | Real Estate Funds [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value Inputs Level 2 [Member] | Real Estate Investment Trust Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	8	4
Fair Value Inputs Level 2 [Member] | Asset Allocation [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	102	80
Fair Value Inputs Level 2 [Member] | Bonds - U.K. - Corporate [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	56	40
Fair Value Inputs Level 2 [Member] | Bonds - U.K. - Government [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	154	114
Fair Value Inputs Level 2 [Member] | Insurance contracts [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	115	14
Fair Value, Inputs, Level 3 [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	34	35
Fair Value, Inputs, Level 3 [Member] | Cash and Cash Equivalents [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Cash and Cash Equivalents [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fixed Income [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Non-U.S. Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Non-U.S. Equity [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | U.S Equity | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Hedge Funds [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	110	0
Fair Value, Inputs, Level 3 [Member] | U.S. Small Cap Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Real Estate Funds [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	5	14
Fair Value, Inputs, Level 3 [Member] | Real Estate Funds [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	19	19
Fair Value, Inputs, Level 3 [Member] | Real Estate Investment Trust Equity [Member] | U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Asset Allocation [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Bonds - U.K. - Corporate [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Bonds - U.K. - Government [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Insurance contracts [Member] | Non-U.S. Pension Benefits [Member]
Fair values of the assets by asset category and by levels of fair value
Fair values of the plan assets by asset category and by levels of fair value	$ 15	$ 16