Long Term Debt (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 1,825
Pacific Routes Revolving Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	500
Bank Revolving Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	100
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 1,225