Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets Schedule of amortization expense for the next five years (Details)

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Intangible Assets Schedule of amortization expense for the next five years (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Finite-Lived Intangible Assets [Line Items]  
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year $ 70
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 79
Finite-Lived Intangible Assets, Amortization Expense, Year Two 78
Finite-Lived Intangible Assets, Amortization Expense, Year Three 75
Finite-Lived Intangible Assets, Amortization Expense, Year Four $ 73