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Goodwill and Other Intangible Assets, Net (Details 2) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Estimated amortization expense related to intangible assets  
Remaining 2012 $ 7
2013 9
2014 7
2015 7
2016 7
2017 and thereafter 29
Total $ 66