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v3.20.2

Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2020 | May 31, 2019 | May 31, 2018
Allowance For Doubtful Accounts [Member] |  |  |  |
Movement In Valuation Allowances And Reserves Roll Forward |  |  |  |
Valuation Allowances And Reserves Beginning Balance |  | $ 121 | $ 199 | $ 115
Charged To Expenses |  | 442 | 295 | 246
Deductions | [1] | 388 | 373 | 162
Valuation Allowances And Reserves Ending Balance |  | 175 | 121 | 199
Allowance For Revenue Adjustments [Member] |  |  |  |
Movement In Valuation Allowances And Reserves Roll Forward |  |  |  |
Valuation Allowances And Reserves Beginning Balance |  | 179 | 202 | 137
Charged To Other Accounts | [2] | 1,286 | 1,192 | 1,173
Deductions | [3] | 1,250 | 1,215 | 1,108
Valuation Allowances And Reserves Ending Balance |  | 215 | 179 | 202
Inventory Valuation Allowance [Member] |  |  |  |
Movement In Valuation Allowances And Reserves Roll Forward |  |  |  |
Valuation Allowances And Reserves Beginning Balance |  | 335 | 268 | 237
Charged To Expenses |  | 33 | 28 | 27
Charged To Other Accounts |  |  | 75 | 6
Deductions |  | 33 | 36 | 2
Valuation Allowances And Reserves Ending Balance |  | $ 335 | $ 335 | $ 268
[1] | Uncollectible accounts written off, net of recoveries, and other adjustments.
[2] | Principally charged against revenue.
[3] | Service failures, rebills and other.

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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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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + 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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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to accounts other than cost and expense. + 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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