Registration of securities issued in business combination transactions

Accrued Liabilities (Details)

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Accrued Liabilities (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accrued Liabilities [Abstract]      
Accounts payable non-trade $ 195 $ 264 $ 257
Income taxes 95 154 74
Accrued compensation and benefits 93 100 95
Allowance for sales returns 69 92 85
Deferred revenue 67 85 88
Sales and other taxes 40 62 41
Liability for consigned goods sold 57 56 69
Accrued interest 67 50 36
Other 71 92 72
Accrued liabilities $ 754 $ 955 $ 817