XML 29 R31.htm IDEA: XBRL DOCUMENT v2.4.0.6
Derivatives (Details)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Mar. 31, 2013
Prepaid Expenses and Other [Member]
USD ($)
Dec. 31, 2012
Prepaid Expenses and Other [Member]
USD ($)
Mar. 31, 2013
Other Noncurrent Assets [Member]
USD ($)
Dec. 31, 2012
Other Noncurrent Assets [Member]
USD ($)
Mar. 31, 2013
Other Accrued Liabilities [Member]
USD ($)
Dec. 31, 2012
Other Accrued Liabilities [Member]
USD ($)
Mar. 31, 2013
Other Noncurrent Liabilities [Member]
USD ($)
Dec. 31, 2012
Other Noncurrent Liabilities [Member]
USD ($)
Mar. 31, 2013
Designated as Hedging Instrument [Member]
USD ($)
Mar. 31, 2013
Designated as Hedging Instrument [Member]
CAD
Mar. 31, 2013
Designated as Hedging Instrument [Member]
JPY (¥)
Dec. 31, 2012
Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2012
Designated as Hedging Instrument [Member]
CAD
Dec. 31, 2012
Designated as Hedging Instrument [Member]
JPY (¥)
Mar. 31, 2013
Designated as Hedging Instrument [Member]
Prepaid Expenses and Other [Member]
USD ($)
Dec. 31, 2012
Designated as Hedging Instrument [Member]
Prepaid Expenses and Other [Member]
USD ($)
Mar. 31, 2013
Designated as Hedging Instrument [Member]
Other Noncurrent Assets [Member]
USD ($)
Dec. 31, 2012
Designated as Hedging Instrument [Member]
Other Noncurrent Assets [Member]
USD ($)
Mar. 31, 2013
Designated as Hedging Instrument [Member]
Other Accrued Liabilities [Member]
USD ($)
Dec. 31, 2012
Designated as Hedging Instrument [Member]
Other Accrued Liabilities [Member]
USD ($)
Mar. 31, 2013
Designated as Hedging Instrument [Member]
Other Noncurrent Liabilities [Member]
USD ($)
Dec. 31, 2012
Designated as Hedging Instrument [Member]
Other Noncurrent Liabilities [Member]
USD ($)
Mar. 31, 2013
Not Designated as Hedging Instrument [Member]
USD ($)
gal
Dec. 31, 2012
Not Designated as Hedging Instrument [Member]
USD ($)
gal
Mar. 31, 2013
Not Designated as Hedging Instrument [Member]
Prepaid Expenses and Other [Member]
USD ($)
Dec. 31, 2012
Not Designated as Hedging Instrument [Member]
Prepaid Expenses and Other [Member]
USD ($)
Mar. 31, 2013
Not Designated as Hedging Instrument [Member]
Other Noncurrent Assets [Member]
USD ($)
Dec. 31, 2012
Not Designated as Hedging Instrument [Member]
Other Noncurrent Assets [Member]
USD ($)
Mar. 31, 2013
Not Designated as Hedging Instrument [Member]
Other Accrued Liabilities [Member]
USD ($)
Dec. 31, 2012
Not Designated as Hedging Instrument [Member]
Other Accrued Liabilities [Member]
USD ($)
Mar. 31, 2013
Not Designated as Hedging Instrument [Member]
Other Noncurrent Liabilities [Member]
USD ($)
Dec. 31, 2012
Not Designated as Hedging Instrument [Member]
Other Noncurrent Liabilities [Member]
USD ($)
Mar. 31, 2013
Foreign Currency Exchange Contracts [Member]
Designated as Hedging Instrument [Member]
Mar. 31, 2012
Foreign Currency Exchange Contracts [Member]
Designated as Hedging Instrument [Member]
Mar. 31, 2013
Fuel Contracts [Member]
Not Designated as Hedging Instrument [Member]
Mar. 31, 2012
Fuel Contracts [Member]
Not Designated as Hedging Instrument [Member]
Mar. 31, 2013
Cash Flow Hedging [Member]
Interest Rate Contracts [Member]
Designated as Hedging Instrument [Member]
Mar. 31, 2012
Cash Flow Hedging [Member]
Interest Rate Contracts [Member]
Designated as Hedging Instrument [Member]
Mar. 31, 2013
Fair Value Hedging [Member]
Interest Rate Contracts [Member]
Designated as Hedging Instrument [Member]
Mar. 31, 2012
Fair Value Hedging [Member]
Interest Rate Contracts [Member]
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]                                                                                    
Notional Balance of Interest Rate Cash Flow Hedge Contracts                     $ 710     $ 740                                                        
Derivative, Final Maturity Date                                                                     Jan. 31, 2016 Dec. 31, 2015 Jun. 30, 2014 Dec. 31, 2013 May 31, 2019 May 31, 2019 Aug. 31, 2022 Aug. 31, 2022
Interest Rate Cash Flow Hedge Asset at Fair Value                                 0 0 0 0                                            
Interest Rate Cash Flow Hedge Liability at Fair Value                                         (21) (22) (44) (48)                                    
Interest Rate Cash Flow Hedge Contracts at Fair Value, Net                     (65)     (70)                                                        
Notional Amount of Interest Rate Fair Value Hedge Contracts                     455     469                                                        
Interest Rate Fair Value Hedge Asset at Fair Value                                 5 0 0 6                                            
Interest Rate Fair Value Hedge Liability at Fair Value                                         0 (2) (6) 0                                    
Interest Rate Fair Value Hedge Contratcs at Fair Value, Net                     (1)     4                                                        
Notional Amount of Foreign Currency Exchange Cash Flow Hedge Contracts                       394 112,004   430 119,277                                                    
Foreign Currency Exchange Cash Flow Hedge Asset at Fair Value                                 113 62 97 63                                            
Foreign Currency Exchange Cash Flow Hedge Liability at Fair Value                                         0 (1) 0 (1)                                    
Foreign Currency Exchange Cash Flow Hedge Contracts at Fair Value, Net 210 123                 210     123                                                        
Notional Amount of Fuel Contracts Nonmonetary                                                 1,957,000,000 1,792,000,000                                
Fuel Contract Assets, at Fair Value                                                     378 511 5 0                        
Fuel Contract Liabilities, at Fair Value                                                             (124) (262) (2) 0                
Fuel Contracts at Fair Value 257 249                                             257 249                                
Derivative Asset, Fair Value, Gross Asset     496 573 102 69                                                                        
Derivative Liability, Fair Value, Gross Liability             (145) (287) (52) (49)                                                                
Derivative Asset, Fair Value, Net     376 320 101 69                                                                        
Derivative Liability, Fair Value, Net             (25) (34) (51) (49)                                                                
Derivative, Fair Value, Net $ 401 $ 306