|
Notional Amounts of Outstanding Derivative Positions (Detail)
In Millions, unless otherwise specified |
Mar. 31, 2012
CAD
|
Mar. 31, 2012
EUR (€)
|
Mar. 31, 2012
GBP (£)
|
Dec. 31, 2011
CAD
|
Dec. 31, 2011
EUR (€)
|
Dec. 31, 2011
GBP (£)
|
Mar. 31, 2012
Fixed to Floating Interest Rate Swaps
USD ($)
|
Dec. 31, 2011
Fixed to Floating Interest Rate Swaps
USD ($)
|
Mar. 31, 2012
Floating to Fixed Interest Rate Swaps
USD ($)
|
Dec. 31, 2011
Floating to Fixed Interest Rate Swaps
USD ($)
|
Mar. 31, 2012
Basis Interest Rate Swaps
USD ($)
|
Dec. 31, 2011
Basis Interest Rate Swaps
USD ($)
|
Mar. 31, 2012
Forward Starting Swaps
USD ($)
|
Dec. 31, 2011
Forward Starting Swaps
USD ($)
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Derivative [Line Items] | ||||||||||||||
| Currency Hedges | 474 | € 2,337 | £ 876 | 318 | € 1,685 | £ 870 | ||||||||
| Interest Rate Hedges | $ 6,424 | $ 6,424 | $ 789 | $ 791 | $ 2,500 | $ 0 | $ 500 | $ 0 |