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SUPPLEMENTARY CONSOLIDATED FINANCIAL STATEMENT SCHEDULE VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | $ 282 | $ 297 | $ 226
Charged to Costs and Expense | 15 | 91 | 132
Charged to Other Accounts | 10 | (19) | (16)
Deductions From Allowance Accounts | (46) | (87) | (45)
Balance at End of Year | 261 | 282 | 297
Current allowances | 250 | 265 | 279
Allowances for doubtful accounts |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 252 | 273 | 187
Charged to Costs and Expense | 4 | 91 | 132
Charged to Other Accounts | 1 | (19) | (1)
Deductions From Allowance Accounts | (46) | (93) | (45)
Balance at End of Year | 211 | 252 | 273
Other allowances |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 30 | 24 | 39
Charged to Costs and Expense | 11 | 0 | 0
Charged to Other Accounts | 9 | 0 | (15)
Deductions From Allowance Accounts | 0 | 6 | 0
Balance at End of Year | 50 | 30 | 24
Written-off |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Deductions From Allowance Accounts | (40) | (93) | (45)
Credited to other accounts and other |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Deductions From Allowance Accounts | $ (6) | $ 6 | $ 0

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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(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: 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(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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