Summary of Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($) $ in Millions	May 31, 2020	Jun. 01, 2019	May 31, 2019	Jun. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Assets	$ 31,342		$ 23,717
Present value of lease liabilities	3,358
Operating lease right-of-use assets, net	3,097		0
Retained earnings	191		(1,643)
Deferred income taxes and other assets	(2,326)		(2,011)
Prepaid expenses and other current assets	(1,653)		(1,968)
Deferred income taxes and other liabilities	$ 2,684		$ 3,347
Adoption of ASC Topic 842 (Note 1)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Assets		$ 2,700
Liabilities		2,700
Present value of lease liabilities		3,200
Operating lease right-of-use assets, net		2,900
Decrease in deferred rent liabilities		348
Build-to-suit lease asset removed		184
Build-to-suit lease liability removed		$ 184
Adoption of ASU 2016-16 (Note 1)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings				$ 507
Deferred income taxes and other assets				422
Prepaid expenses and other current assets				45
Deferred income taxes and other liabilities				$ 40