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Share Repurchase Programs Share Repurchase Programs (Tables)
 12 Months Ended
Dec. 31, 2016
Equity [Abstract]  
Share Repurchase Programs
The following share repurchase programs were authorized by the Company’s Board of Directors:
In billions
 
 
Authorization Date
Authorized
Remaining
November 2, 2016 (“2016 Repurchase Program”)
$
15.0

$
15.0

December 15, 2014 (“2014 Repurchase Program”)
$
10.0

$
3.2

December 17, 2013 (“2013 Repurchase Program”)
$
6.0

$
—

September 19, 2012 (“2012 Repurchase Program”)
$
6.0

$
—