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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in goodwill, net of purchase accounting adjustments
Changes in goodwill during the years ended December 31, 2016 and 2015 are summarized as follows (in millions):
 
IFS
 
GFS
 
Corporate & Other
 
Total
Balance, December 31, 2014
$
6,627

 
$
1,990

 
$
261

 
$
8,878

Goodwill acquired during 2015
1,049

 
4,653

 
301

 
6,003

Goodwill distributed through sale of non-strategic assets
—

 
—

 
(98
)
 
(98
)
Purchase price and foreign currency adjustments
—

 
(38
)
 
—

 
(38
)
Balance, December 31, 2015
7,676

 
6,605

 
464

 
14,745

Purchase price and foreign currency adjustments
—

 
(273
)
 
65

 
(208
)
Goodwill relating to PS&E included in assets held for sale
—

 
—

 
(359
)
 
(359
)
Balance, December 31, 2016
$
7,676

 
$
6,332

 
$
170

 
$
14,178