|
Financial Instruments Narrative (Detail) (USD $)
|
12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Jun. 28, 2009
|
Jun. 03, 2009
Wyeth [Member]
|
Mar. 24, 2009
Wyeth [Member]
|
Dec. 31, 2011
Unused Lines of Credit [Member]
|
Dec. 31, 2011
Unused Lines of Credit [Member]
Expire in 2016 [Member]
|
Dec. 31, 2011
Commercial Paper [Member]
|
Dec. 31, 2010
Commercial Paper [Member]
|
Dec. 31, 2011
Foreign Exchange Contract [Member]
|
Dec. 31, 2011
Foreign Exchange Contract [Member]
United Kingdom [Member]
Maturing in 2038 [Member]
|
Dec. 31, 2011
Interest Rate Contract [Member]
|
Dec. 31, 2011
Credit Risk Contract [Member]
|
Dec. 31, 2011
Derivative Instruments Issued By Counterparties [Member]
|
|
| Short - Term Borrowings: | ||||||||||||||
| Weighted-average effective interest rate on short-term borrowings outstanding | 0.20% | 2.80% | ||||||||||||
| Commercial paper outstanding | $ 2,700,000,000 | $ 1,200,000,000 | ||||||||||||
| Line of credit, maximum borrowing capacity | 9,400,000,000 | |||||||||||||
| Line of credit, current borrowing capacity before expiration | 2,300,000,000 | |||||||||||||
| Line of credit, remaining borrowing capacity | 8,600,000,000 | |||||||||||||
| Line of credit, remaining borrowing capacity, amount lenders have committed to loan us | 7,500,000,000 | |||||||||||||
| Line of credit, current borrowing capacity able to support commercial paper borrowings before expiration | 7,000,000,000 | |||||||||||||
| Derivative Financial Instruments and Hedging Activities | ||||||||||||||
| Aggregate notional amount of foreign exchange derivative financial instruments | 48,100,000,000 | |||||||||||||
| Notional amount of foreign exchange derivative financial instruments | 2,300,000,000 | |||||||||||||
| Aggregate notional amount of interest rate derivative financial instruments | 10,600,000,000 | |||||||||||||
| Credit Risk Derivatives | ||||||||||||||
| Aggregate fair value of net derivative liabilities | 502,000,000 | |||||||||||||
| Posted collateral | 555,000,000 | |||||||||||||
| Additional collateral | 46,000,000 | |||||||||||||
| Concentration risk maximum exposure | 2,800,000,000 | |||||||||||||
| Securities received as collateral | 491,000,000 | |||||||||||||
| Senior unsecured notes | $ 24,000,000,000 | $ 10,500,000,000 | $ 13,500,000,000 | |||||||||||