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Share-Based Compensation Plans
6 Months Ended
Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-Based Compensation Plans
Share-Based Compensation Plans — The Northern Trust Corporation 2012 Stock Plan provides for the grant of nonqualified stock options, incentive stock options, stock appreciation rights, stock awards, restricted stock units and performance stock units.
Total compensation expense for share-based payment arrangements and the associated tax impacts were as follows for the three and six months ended June 30, 2016 and 2015.
Table 58: Total Compensation Expense for Share-Based Payment Arrangements
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(In Millions)
2016
 
2015
 
2016
 
2015
Restricted Stock Unit Awards
$
14.7

 
$
13.4

 
$
30.0

 
$
26.9

Stock Options
0.8

 
1.7

 
7.2

 
7.7

Performance Stock Units
4.5

 
4.1

 
8.6

 
7.5

Total Share-Based Compensation Expense
20.0

 
19.2

 
45.8

 
42.1

Tax Benefits Recognized
$
7.6

 
$
7.2

 
$
17.3

 
$
15.8