|
Trade Accounts Receivable (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2014
|
Mar. 31, 2014
|
|---|---|---|
| Components of trade accounts receivable, net | ||
| Accounts receivable - billed | $ 614 | $ 739 |
| Accounts receivable - unbilled | 64 | 61 |
| Other receivables | 8 | 19 |
| Less: Allowances | (17) | (19) |
| Trade accounts receivable, net | $ 669 | $ 800 |