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Warranty and Deferred Extended Warranty Revenue (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Aug. 02, 2013
Aug. 03, 2012
Aug. 02, 2013
Aug. 03, 2012
Warranty liability:        
Warranty liability at beginning of period $ 760 $ 862 $ 762 $ 888
Costs accrued for new warranty contracts and changes in estimates for pre-existing warranties 256 250 498 533
Service obligations honored (250) (272) (494) (581)
Warranty liability at end of period 766 840 766 840
Current portion 490 538 490 538
Non-current portion 276 302 276 302
Warranty liability at end of period 766 840 766 840
Deferred extended warranty revenue:        
Deferred extended warranty revenue at beginning of period 6,982 7,044 7,048 7,002
Revenue deferred for new extended warranties 1,035 1,027 1,994 2,033
Revenue Recognized (1,013) (974) (2,038) (1,938)
Deferred extended warranty revenue at end of period 7,004 7,097 7,004 7,097
Current portion 3,336 3,344 3,336 3,344
Non-current portion 3,668 3,753 3,668 3,753
Deferred extended warranty revenue at end of period $ 7,004 $ 7,097 $ 7,004 $ 7,097