|
Notional Amounts of Outstanding Derivative Positions (Detail)
In Millions, unless otherwise specified |
Mar. 31, 2013
AED
|
Mar. 31, 2013
CAD
|
Mar. 31, 2013
EUR (€)
|
Mar. 31, 2013
GBP (£)
|
Mar. 31, 2013
MXN
|
Mar. 31, 2013
MYR
|
Dec. 31, 2012
AED
|
Dec. 31, 2012
CAD
|
Dec. 31, 2012
EUR (€)
|
Dec. 31, 2012
GBP (£)
|
Dec. 31, 2012
MXN
|
Dec. 31, 2012
MYR
|
Mar. 31, 2013
Fixed to Floating Interest Rate Swaps
USD ($)
|
Dec. 31, 2012
Fixed to Floating Interest Rate Swaps
USD ($)
|
Mar. 31, 2013
Floating to Fixed Interest Rate Swaps
USD ($)
|
Dec. 31, 2012
Floating to Fixed Interest Rate Swaps
USD ($)
|
Mar. 31, 2013
Basis Interest Rate Swaps
USD ($)
|
Dec. 31, 2012
Basis Interest Rate Swaps
USD ($)
|
Mar. 31, 2013
Heating Oil [Member]
gal
|
Dec. 31, 2012
Heating Oil [Member]
gal
|
Mar. 31, 2013
Ultra Low Sulfur Diesel [Domain]
gal
|
Dec. 31, 2012
Ultra Low Sulfur Diesel [Domain]
gal
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Derivative [Line Items] | ||||||||||||||||||||||
| Currency Hedges | 0 | 296 | € 1,890 | £ 753 | 2,300 | 600 | 551 | 341 | € 1,783 | £ 797 | 0 | 500 | ||||||||||
| Interest Rate Hedges | $ 6,049 | $ 7,274 | $ 781 | $ 781 | $ 2,500 | $ 2,500 | ||||||||||||||||
| Commodity Hedges | 100,000,000 | 0 | 98,000,000 | 0 |