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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]  
Schedule Of Finite Lived Intangible Assets
The following table is a summary of the Company’s intangible assets, which are included as a component of Other assets in the Company's Consolidated Balance Sheet, as of December 31, 2014 and 2013:
 
 
 
 
Year ended December 31, 2014
 
Year ended December 31, 2013
(in millions)
Weighted-average useful life (in years)
 
Gross carrying
amount
 
Accumulated
amortization
 
Gross carrying amount
 
Accumulated Amortization
Customer relationships/marketing agreements
9
 
$
38

 
$
26

 
$
39

 
$
23

Trademarks/trade names
6
 
36

 
30

 
36

 
25

Owned domestic slots
Indefinite
 
303

 
n/a

 
93

 
n/a

Leased domestic slots (a)
39
 
19

 
5

 
19

 
4

Non-compete agreements
2
 
5

 
5

 
5

 
5

Gate leasehold rights
19
 
60

 
32

 
60

 
29

Total
15
 
$
461

 
$
98

 
$
252

 
$
86


(a) Useful life of leased slots is based on the stated lease term.