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Warranty and Deferred Extended Warranty Revenue (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Aug. 03, 2012
Jul. 29, 2011
Aug. 03, 2012
Jul. 29, 2011
Warranty liability:        
Warranty liability at beginning of period $ 862 $ 931 $ 888 $ 895
Costs accrued for new warranty contracts and changes in estimates for pre-existing warranties 250 263 533 556
Service obligations honored (272) (250) (581) (507)
Warranty liability at end of period 840 944 840 944
Current portion 538 622 538 622
Non-current portion 302 322 302 322
Warranty liability at end of period 840 944 840 944
Deferred extended warranty revenue:        
Deferred extended warranty revenue at beginning of period 7,044 6,589 7,002 6,416
Revenue deferred for new extended warranties 1,128 1,120 2,134 2,188
Revenue Recognized (974) (915) (1,938) (1,810)
Deferred extended warranty revenue at end of period 7,198 6,794 7,198 6,794
Current portion 3,404 3,158 3,404 3,158
Non-current portion 3,794 3,636 3,794 3,636
Deferred extended warranty revenue at end of period $ 7,198 $ 6,794 $ 7,198 $ 6,794