Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Other Intangible Assets

The following table presents information about the Company’s goodwill and other intangible assets at December 31 (in millions):

			2016				2015
Item	Asset life (a)		Gross  Carrying Amount		Accumulated Amortization		Gross  Carrying Amount		Accumulated Amortization
Goodwill			$	4,523			$	4,523
Finite-lived intangible assets
Frequent flyer database (b)		22	$	1,177	$	771	$	1,177	$	702
Hubs		20		145		82		145		74
Contracts		13		135		95		135		86
Patents and tradenames		3		108		108		108		108
Airport slots and gates		8		97		97		97		97
Other		25		109		81		109		77
Total			$	1,771	$	1,234	$	1,771	$	1,144
Indefinite-lived intangible assets
Route authorities			$	1,562			$	1,570
Airport slots and gates				536				942
Tradenames and logos				593				593
Alliances				404				404
Total			$	3,095			$	3,509

(a) Weighted average life expressed in years.

(b) The frequent flyer database is amortized based on an accelerated amortization schedule to reflect utilization of the assets. Estimated cash flows correlating to the expected attrition rate of customers in the frequent flyer database is considered in the determination of the amortization schedules.