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Schedule II - Valuation and Qualifying Accounts (Detail) - Allowance for Sales Returns - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2019 | May 31, 2018 | May 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
BALANCE AT BEGINNING OF PERIOD | $ 330 | $ 343 | $ 444
CHARGED TO COSTS AND EXPENSES |  | 640 | 696
Charged to Other Accounts |  | 5 | 3
WRITE-OFFS, NET |  | (658) | (800)
BALANCE AT END OF PERIOD |  | 330 | $ 343
Accounting Standards Update 2014-09 |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
BALANCE AT BEGINNING OF PERIOD | 734 |  |
CHARGED TO COSTS AND EXPENSES | 1,959 |  |
Charged to Other Accounts | (30) |  |
WRITE-OFFS, NET | (1,820) |  |
BALANCE AT END OF PERIOD | $ 843 | $ 734 |

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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