Supplemental Financial Information - Supplemental Cash Flows, Non-Cash Investing and Financing Activities (Detail) - USD ($) $ in Millions	12 Months Ended
Apr. 26, 2019	Apr. 27, 2018	Apr. 28, 2017
Non-cash Investing and Financing Activities:
Capital expenditures incurred but not paid	$ 9	$ 24	$ 19
Non-cash extinguishment of sale-leaseback financing obligations		130	19
Supplemental Cash Flow Information:
Income taxes paid, net of refunds	205	87	102
Interest paid	$ 53	$ 58	$ 44

Future cash outflow to pay for purchases of fixed assets that have occurred.

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