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SUPPLEMENTARY CONSOLIDATED FINANCIAL STATEMENT SCHEDULE VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Mar. 31, 2018
Valuation and Qualifying Accounts [Abstract] |
SUPPLEMENTARY CONSOLIDATED FINANCIAL STATEMENT SCHEDULE VALUATION AND QUALIFYING ACCOUNTS | SUPPLEMENTARY CONSOLIDATED FINANCIAL STATEMENT SCHEDULE VALUATION AND QUALIFYING ACCOUNTS For the Years Ended March 31, 2018, 2017 and 2016 (In millions)
|  |  | Additions |  |  |  |
Description | Balance at Beginning of Year |  | Charged to Costs and Expenses |  | Charged to Other Accounts (3) |  | Deductions From Allowance Accounts (1) |  | Balance at End of Year (2)
Year Ended March 31, 2018 |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts | $ | 243 |  |  | $ | 44 |  |  | $ | 13 |  |  | $ | (113 | ) |  | $ | 187 |
Other allowances | 42 |  |  | — |  |  | (3 | ) |  | — |  |  | 39 |
| $ | 285 |  |  | $ | 44 |  |  | $ | 10 |  |  | $ | (113 | ) |  | $ | 226 |
Year Ended March 31, 2017 |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts | $ | 212 |  |  | $ | 93 |  |  | $ | 7 |  |  | $ | (69 | ) |  | $ | 243 |
Other allowances | 41 |  |  | — |  |  | 2 |  |  | (1 | ) |  | 42 |
| $ | 253 |  |  | $ | 93 |  |  | $ | 9 |  |  | $ | (70 | ) |  | $ | 285 |
Year Ended March 31, 2016 |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts | $ | 141 |  |  | $ | 113 |  |  | $ | 2 |  |  | $ | (44 | ) |  | $ | 212 |
Other allowances | 33 |  |  | — |  |  | (3 | ) |  | 11 |  |  | 41 |
| $ | 174 |  |  | $ | 113 |  |  | $ | (1 | ) |  | $ | (33 | ) |  | $ | 253 |
|  |  | 2018 |  | 2017 |  | 2016
(1) | Deductions: |  |  |  |  |  |
| Written off |  | $ | (113 | ) |  | $ | (70 | ) |  | $ | (33 | )
| Credited to other accounts |  | — |  |  | — |  |  | — |
| Total |  | $ | (113 | ) |  | $ | (70 | ) |  | $ | (33 | )
(2) | Amounts shown as deductions from current and non-current receivables |  | $ | 226 |  |  | $ | 285 |  |  | $ | 253 |
(3) | Primarily represents reclassifications from other balance sheet accounts. |  |  |  |  |  |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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