Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill And Intangible Assets Disclosure [Abstract]

Summary Of Amortization Of Intangible Assets

The following tables provide information relating to the Company’s amortized intangible assets as of December 31 (in millions):

	2012
	Cost		Accumulated Amortization		Net Book Value
Amortized intangible assets:
Airport operating rights	$	515	$	385	$	130
Gate lease rights		155		124		31
Total	$	670	$	509	$	161

	2011
	Cost		Accumulated Amortization		Net Book Value
Amortized intangible assets:
Airport operating rights	$	515	$	364	$	151
Gate lease rights		160		125		35
Total	$	675	$	489	$	186