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Balance Sheet Details - Other Long-term Liabilities (Detail) - USD ($)
$ in Millions
Jan. 26, 2018
Apr. 28, 2017
Liabilities Other Than Long Term Debt Noncurrent [Abstract]    
Liability for uncertain tax positions $ 303 $ 148
Income taxes payable 569 0
Product warranty liabilities 15 17
Other liabilities 86 84
Other long-term liabilities $ 973 $ 249