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Supplementary Consolidated Financial Statement Schedule Valuation And Qualifying Accounts (Notes) | 12 Months Ended
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Mar. 31, 2014
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, 2015, 2014 and 2013 (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, 2015 |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts | $ | 112 |  |  | $ | 67 |  |  | $ | — |  |  | $ | (38 | ) |  | $ | 141 |
Other allowances | 22 |  |  | 8 |  |  | — |  |  | 3 |  |  | 33 |
| $ | 134 |  |  | $ | 75 |  |  | $ | — |  |  | $ | (35 | ) |  | $ | 174 |
Year Ended March 31, 2014 |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts | $ | 121 |  |  | $ | 36 |  |  | $ | (11 | ) |  | $ | (34 | ) |  | $ | 112 |
Other allowances | 15 |  |  | — |  |  | 10 |  |  | (3 | ) |  | 22 |
| $ | 136 |  |  | $ | 36 |  |  | $ | (1 | ) |  | $ | (37 | ) |  | $ | 134 |
Year Ended March 31, 2013 |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts | $ | 111 |  |  | $ | 28 |  |  | $ | 16 |  |  | $ | (34 | ) |  | $ | 121 |
Other allowances | 14 |  |  | 4 |  |  | 1 |  |  | (4 | ) |  | 15 |
| $ | 125 |  |  | $ | 32 |  |  | $ | 17 |  |  | $ | (38 | ) |  | $ | 136 |
|  |  | 2015 |  | 2014 |  | 2013
(1) | Deductions: |  |  |  |  |  |
| Written off |  | $ | (34 | ) |  | $ | (39 | ) |  | $ | (38 | )
| Credited to other accounts |  | (1 | ) |  | 2 |  |  | — |
| Total |  | $ | (35 | ) |  | $ | (37 | ) |  | $ | (38 | )
(2) | Amounts shown as deductions from current and non-current receivables |  | $ | 174 |  |  | $ | 134 |  |  | $ | 136 |
(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 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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