Summary of Significant Accounting Policies - Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	6 Months Ended
Sep. 25, 2021	Sep. 26, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used in operating leases	$ 257	$ 191
COVID-19
Cash paid for amounts included in the measurement of lease liabilities:
Deferred rent payments	$ 5	$ 60

Amount of excess of rental income recognized over rental payment required by lease.

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