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New Revenue Accounting Standard (Tables)
12 Months Ended
Jan. 27, 2019
Accounting Changes and Error Corrections [Abstract]  
Changes in deferred revenue
The following table shows the changes in deferred revenue during fiscal year 2019:
 
January 27,
2019
 
(in millions)
Balance as of January 28, 2018
$
68

Adjustment to retained earnings upon adoption of new revenue standard
(5
)
Balance as of January 29, 2018
63

Deferred revenue added during the period
344

Revenue recognized during the period
(269
)
Balance as of January 27, 2019
$
138