|
Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Millions, except Share data, unless otherwise specified |
Dec. 31, 2014
|
Mar. 31, 2014
|
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Accumulated depreciation | $ 847 | $ 828 |
| Preferred stock, No par value (in dollars per share) | $ 0 | $ 0 |
| Preferred stock, Shares authorized | 10,000,000 | 10,000,000 |
| Preferred stock, Shares issued | 0 | 0 |
| Preferred stock, Shares outstanding | 0 | 0 |
| Common stock, Par value (in dollars per share) | $ 0.10 | $ 0.10 |
| Common stock, Shares authorized | 1,100,000,000 | 1,100,000,000 |
| Common stock, Shares issued | 589,695,081 | 589,695,081 |
| Common stock, Shares outstanding | 438,313,874 | 438,740,478 |
| Treasury stock, Shares | 151,381,207 | 150,954,603 |