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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)

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