|
Income Taxes (Provision For (Benefit From) Income Taxes) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Mar. 31, 2013
|
|
| Income Tax Disclosure [Abstract] | |||
| Federal, Current | $ 10 | $ (2) | $ 0 |
| State, Current | 0 | 1 | 0 |
| Foreign, Current | 21 | 8 | 39 |
| Total, Current | 31 | 7 | 39 |
| Federal, Deferred | 17 | (9) | 5 |
| State, Deferred | 0 | (2) | 1 |
| Foreign, Deferred | 2 | 3 | (4) |
| Total, Deferred | 19 | (8) | 2 |
| Total, Federal | 27 | (11) | 5 |
| Total, State | 0 | (1) | 1 |
| Total, Foreign | 23 | 11 | 35 |
| Total provision for (benefit from) income taxes | $ 50 | $ (1) | $ 41 |