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SUPPLEMENTARY CONSOLIDATED FINANCIAL STATEMENT SCHEDULE VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | $ 297 | $ 226 | $ 285
Charged to Costs and Expense | 91 | 132 | 44
Charged to Other Accounts | (19) | (16) | 10
Deductions From Allowance Accounts | (87) | (45) | (113)
Balance at End of Year | 282 | 297 | 226
Current allowances | 265 | 279 | 216
Allowances for doubtful accounts |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 273 | 187 | 243
Charged to Costs and Expense | 91 | 132 | 44
Charged to Other Accounts | (19) | (1) | 13
Deductions From Allowance Accounts | (93) | (45) | (113)
Balance at End of Year | 252 | 273 | 187
Other allowances |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 24 | 39 | 42
Charged to Costs and Expense | 0 | 0 | 0
Charged to Other Accounts | 0 | (15) | (3)
Deductions From Allowance Accounts | 6 | 0 | 0
Balance at End of Year | 30 | 24 | 39
Written off |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Deductions From Allowance Accounts | (93) | (45) | (113)
Credited to other accounts |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Deductions From Allowance Accounts | $ 6 | $ 0 | $ 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) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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