|
Segment Information (Long-Lived Assets By Geographic Area) (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
Mar. 31, 2014
|
|---|---|---|
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||
| Long-lived assets | $ 2,283 | $ 2,410 |
| North America [Member] | ||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||
| Long-lived assets | 1,809 | 1,940 |
| International [Member] | ||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||
| Long-lived assets | $ 474 | $ 470 |