Long Term Debt (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012 Pacific Term Loan B1 [Member]	Dec. 31, 2012 Pacific Term Loan B2 [Member]	Dec. 31, 2012 2012 Pacific Revolving Facility [Member]	Dec. 31, 2012 Pacific Routes Term Facility [Member]	Dec. 31, 2012 Pacific Routes Revolving Facility [Member]	Dec. 31, 2012 Senior Secured Notes [Member]	Dec. 31, 2012 Senior Second Lien Notes [Member]	Dec. 31, 2012 2012 Pacific Facilities [Member]	Dec. 31, 2012 Senior Secured Pacific Facilities [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt	$ 1,100	$ 400	$ 0					$ 1,500
Extinguishment of Debt, Amount				$ 246	$ 0	$ 600	$ 306		$ 1,152