|
Contingencies (Details) (USD $)
In Millions, unless otherwise specified |
6 Months Ended |
|---|---|
|
Mar. 31, 2015
|
|
| Accrual for Environmental Loss Contingencies [Roll Forward] | |
| Beginning balance | $ 19 |
| Payments and other | (3) |
| Accruals | 0 |
| Ending balance | 16 |
| Superfund Sites | |
| Accrual for Environmental Loss Contingencies [Roll Forward] | |
| Beginning balance | 2 |
| Payments and other | 0 |
| Accruals | 0 |
| Ending balance | 2 |
| Non-Superfund Sites | |
| Accrual for Environmental Loss Contingencies [Roll Forward] | |
| Beginning balance | 17 |
| Payments and other | (3) |
| Accruals | 0 |
| Ending balance | $ 14 |