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Employee Benefit Plans (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Employee Benefit Plans [Abstract] | |||
| Defined Contribution Plan, Cost Recognized | $ 18 | $ 16 | $ 18 |
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- Details
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- Definition
The amount of the cost recognized during the period for defined contribution plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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