Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions		12 Months Ended
	Nov. 19, 2015	May 31, 2018 USD ($)	May 31, 2017 USD ($)	May 31, 2016 USD ($)	Jun. 01, 2018 USD ($)	Feb. 28, 2018 USD ($)	Dec. 23, 2015	May 31, 2015 USD ($)
Significant Accounting Policies [Line Items]
Stock split ratio for 100 percent of stock dividend declared	2
Dividend payable as result of stock split (as a percent)							100.00%
Capital in excess of stated value		$ (6,384)	$ (5,710)
Total shareholders’ equity		9,812	12,407	$ 12,258				$ 12,707
Reserve balances for sales discounts, returns and miscellaneous claims		675	643
Total advertising and promotion expenses		3,577	3,341	3,278
Prepaid advertising and promotion expenses		730	558
Allowance for uncollectible accounts receivable		30	19
Excess tax benefit, amount		230
Cash inflow (outflow) from operations		4,955	3,846	3,399
Accumulated other comprehensive income (loss)		(92)	(213)
Cash inflow (outflow) from financing activities		(4,835)	(2,148)	(2,974)
Retained earnings		3,517	6,907
Deferred income taxes and other assets		(2,509)	(2,787)
Prepaid expenses and other current assets		(1,130)	(1,150)
Deferred income taxes and other liabilities		$ 3,216	1,907
Minimum | Building
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		2 years
Minimum | Leasehold improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		2 years
Minimum | Machinery and Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		2 years
Minimum | Software and Software Development Costs
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		2 years
Minimum | Land Improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		2 years
Maximum | Building
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		40 years
Maximum | Leasehold improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		40 years
Maximum | Machinery and Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		15 years
Maximum | Software and Software Development Costs
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		12 years
Maximum | Land Improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		40 years
Class B Common Stock
Significant Accounting Policies [Line Items]
Stock split ratio for 100 percent of stock dividend declared	2
Class A Convertible Common Stock
Significant Accounting Policies [Line Items]
Stock split ratio for 100 percent of stock dividend declared	2
Prepaid expenses and other current assets
Significant Accounting Policies [Line Items]
Prepaid advertising and promotion expenses		$ 359	311
Deferred income taxes and other assets
Significant Accounting Policies [Line Items]
Prepaid advertising and promotion expenses		371	247
Accounting Standard Update 2016-09, Excess Tax Benefit Component
Significant Accounting Policies [Line Items]
Cash inflow (outflow) from operations			177	281
Cash inflow (outflow) from financing activities			(177)	(281)
Accounting Standard Update 2016-09, Statutory Tax Withholding Component
Significant Accounting Policies [Line Items]
Cash inflow (outflow) from operations			29	22
Cash inflow (outflow) from financing activities			(29)	(22)
Accounting Standards Update 2018-02
Significant Accounting Policies [Line Items]
Accumulated other comprehensive income (loss)						$ 17
Retained earnings						$ (17)
Subsequent Event | Accounting Standards Update 2016-16
Significant Accounting Policies [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
Subsequent Event | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Significant Accounting Policies [Line Items]
Retained earnings					$ 23
Repurchases Of Class B Common Stock | Restatement Adjustment
Significant Accounting Policies [Line Items]
Capital in excess of stated value			2,900
Retained earnings			2,900
Retained Earnings
Significant Accounting Policies [Line Items]
Total shareholders’ equity		3,517	6,907	6,899				7,293
Retained Earnings | Repurchases Of Class B Common Stock | Restatement Adjustment
Significant Accounting Policies [Line Items]
Total shareholders’ equity			200	100				2,600
Capital in Excess of Stated Value
Significant Accounting Policies [Line Items]
Total shareholders’ equity		$ 6,384	5,710	5,038				4,165
Capital in Excess of Stated Value | Repurchases Of Class B Common Stock | Restatement Adjustment
Significant Accounting Policies [Line Items]
Total shareholders’ equity			$ (200)	$ (100)				$ (2,600)