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Goodwill and Intangible Assets
9 Months Ended
Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Goodwill and Intangible Assets

Goodwill and indefinitely-lived trade names are not amortized, but are subject to annual impairment reviews, or more frequent reviews if events or circumstances indicate there may be impairment. During the three months ended September 30, 2016, the Company performed its required annual impairment tests and concluded there was no impairment of goodwill or trade names.

The Company's total goodwill was $38.2 billion and $38.1 billion as of September 30, 2016 and December 31, 2015, respectively.








The following is a summary of the Company's intangible assets as of September 30, 2016 and December 31, 2015:

 
September 30, 2016
 
December 31, 2015
In millions
Gross
Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
Gross
Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
Trademarks (indefinitely-lived)
$
6,398

 
$

 
$
6,398

 
$
6,398

 
$

 
$
6,398

Customer contracts and
  relationships and covenants not
  to compete
11,340

 
(4,624
)
 
6,716

 
10,594

 
(4,092
)
 
6,502

Favorable leases and other
1,132

 
(679
)
 
453

 
1,595

 
(617
)
 
978

 
$
18,870

 
$
(5,303
)
 
$
13,567

 
$
18,587

 
$
(4,709
)
 
$
13,878