Summary of Significant Accounting Policies - Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	9 Months Ended
Dec. 26, 2020	Dec. 28, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used in operating leases	$ 341	$ 372
COVID-19
Cash paid for amounts included in the measurement of lease liabilities:
Deferred rent payments	$ 41

The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property, by the lessor or lessee, respectively. Such receivable is reduced by allowances attributable to, for instance, credit risk associated with a lessee.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121598990&loc=d3e40879-112712

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
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-Section 25
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-URI http://asc.fasb.org/extlink&oid=121549951&loc=d3e39896-112707

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
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-URI http://asc.fasb.org/extlink&oid=121549951&loc=d3e39927-112707

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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