|
Income Taxes (Schedule Of Unrecognized Tax Benefits) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Operating Loss Carryforwards [Line Items] | ||
| Unrecognized tax benefits, beginning balance | $ 232 | $ 297 |
| Increases in unrecognized tax benefits related to prior year tax positions | 9 | 10 |
| Decreases in unrecognized tax benefits related to prior year tax positions | (14) | (79) |
| Increases in unrecognized tax benefits related to current year tax positions | 50 | 44 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | (6) | (29) |
| Reductions in unrecognized tax benefits due to lapse of applicable statute of limitations | (7) | (9) |
| Changes in unrecognized tax benefits due to foreign currency translation | (10) | (2) |
| Unrecognized tax benefits, ending balance | $ 254 | $ 232 |