Reorganization (Narrative) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012
Reorganization [Line Items]
Assumed Non-Residential Real Property Leases	526
Ground Leases Rejected	10
Ground Leases Which Must Be Assumed or Rejected by an Extended Date	37
Aircraft And Or Engine Leases Rejected	40
Reached agreement to modify leases	155
Bankruptcy Claims, Number Claims Filed	13,366
Bankruptcy Claims, Amount of Claims Filed	$ 290,000,000,000
Bankruptcy Claims, Amount of Claims Expunged by Bankruptcy Court	100,200,000,000
Bankruptcy Claims, Amount of Claims under Review by Management	14,800,000,000
Unsecured Claims Threshold	190,000,000
Claims Filed After Bar Date [Member]
Reorganization [Line Items]
Bankruptcy Claims, Number Claims Filed	350
Bankruptcy Claims, Amount of Claims Filed	59,000,000
MD-80 Aircraft [Member]
Reorganization [Line Items]
Aircraft And Or Engine Leases Rejected	21
Reached agreement to modify leases	83
Fokker 100 Aircraft [Member]
Reorganization [Line Items]
Aircraft And Or Engine Leases Rejected	4
Boeing Seven Five Seven To Two Zero Zero Aircraft [Member]
Reorganization [Line Items]
Aircraft And Or Engine Leases Rejected	7
Reached agreement to modify leases	36
Spare Engines [Member]
Reorganization [Line Items]
Aircraft And Or Engine Leases Rejected	8
Aircraft leases retained	87
Airbus Three Zero Zero To Six Zero Zero R Aircraft [Member]
Reorganization [Line Items]
Relinquished Aircraft Subject to Mortgage	1
Boeing 737-800, 757-200, 767-300ER And 777-200ER Models, Bombardier CRJ-700, And McDonnell Douglas MD-80 Aircraft [Member]
Reorganization [Line Items]
Aircraft leases retained	340
Boeing Seven Three Seven Eight Zero Zero [Member]
Reorganization [Line Items]
Reached agreement to modify leases	9
Boeing767200er Aircraft [Member]
Reorganization [Line Items]
Reached agreement to modify leases	11
Boeing767300er Aircraft [Member]
Reorganization [Line Items]
Reached agreement to modify leases	13
Boeing 777-200 ER Aircraft [Member]
Reorganization [Line Items]
Reached agreement to modify leases	3
Super Atr Aircraft [Member]
Reorganization [Line Items]
Reached agreement to modify leases	39
Aircraft returned to lessor	30
Airplanes To Be Returned to Lessor	9
Embraer RJ [Member]
Reorganization [Line Items]
Reached Agreement with Aircraft Lender	216
Bankruptcy Claims, Amount of Claims Filed	$ (592,000,000)
Embraer One Four Zero [Member]
Reorganization [Line Items]
Mortgage Debt to be Resturctured Aircraft	59
Embraer One Four Five [Member]
Reorganization [Line Items]
Mortgage Debt to be Resturctured Aircraft	68
Aircraft for which debt wil not be reduced	50
Embraer Rj One Three Five [Member]
Reorganization [Line Items]
Aircraft to be Transferred to Lender and Leased Back	21
Airplanes Surrendered to Lender	18