Contingencies and Commitments - Accrued Liabilities for Remediation Activities Included in Balance Sheet (Detail) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2013
|
Dec. 31, 2012
|
---|---|---|
Commitments and Contingencies Disclosure [Line Items] | ||
Accounts payable, Deferred credits and other non-current liabilities | $ 199 | $ 203 |
Accounts Payable
|
||
Commitments and Contingencies Disclosure [Line Items] | ||
Accounts payable, Deferred credits and other non-current liabilities | 17 | 21 |
Deferred credits and other noncurrent liabilities
|
||
Commitments and Contingencies Disclosure [Line Items] | ||
Accounts payable, Deferred credits and other non-current liabilities | $ 182 | $ 182 |