|
Accrued Litigation for Both Covered and Non-Covered Litigation (Detail) (USD $)
In Millions, unless otherwise specified |
9 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2013
|
Sep. 30, 2012
|
Jun. 30, 2012
|
Sep. 30, 2011
|
Jun. 30, 2013
Settled
|
Jun. 30, 2012
Settled
|
Jun. 30, 2013
Unsettled
|
Jun. 30, 2012
Unsettled
|
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| Loss Contingency Accrual [Roll Forward] | ||||||||||||
| Balance at October 1 | $ 5 | $ 4,386 | $ 4,384 | $ 425 | ||||||||
| Provision for unsettled matters | 3 | 4,098 | ||||||||||
| Interest accretion on settled matters | 1 | |||||||||||
| Payments to settlement funds | (351) | (140) | (4,033) | [1] | [1] | |||||||
| Balance at June 30 | $ 5 | $ 4,386 | $ 4,384 | $ 425 | ||||||||
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