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STOCK BASED COMPENSATION (Tables)
 6 Months Ended
Jul. 01, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Assumptions Used
The following summarizes the assumptions used in the Black-Scholes Merton option pricing model (“Black-Scholes”) to value options granted during the six months ended July 1, 2016:
Risk-free interest rate
1.3% to 1.6%

Weighted average volatility
24.6
%
Dividend yield
0.6
%
Expected years until exercise
5.5 - 8.0
Schedule of Stock-Based Compensation Costs
The following summarizes the components of the Company’s stock-based compensation expense ($ in millions):
 
Three Months Ended
 
Six Months Ended
 
July 1, 2016
 
July 3, 2015
 
July 1, 2016
 
July 3, 2015
RSUs/PSUs:
 
 
 
 
 
 
 
Pretax compensation expense
$
7.2

 
$
4.4

 
$
14.2

 
$
10.2

Income tax benefit
(2.4
)
 
(1.6
)
 
(4.8
)
 
(3.4
)
RSU/PSU expense, net of income taxes
4.8

 
2.8

 
9.4

 
6.8

Stock options:
 
 
 
 
 
 
 
Pretax compensation expense
3.7

 
2.5

 
8.2

 
5.6

Income tax benefit
(1.3
)
 
(1.0
)
 
(2.8
)
 
(2.0
)
Stock option expense, net of income taxes
2.4

 
1.5

 
5.4

 
3.6

Total stock-based compensation:
 
 
 
 
 
 
 
Pretax compensation expense
10.9

 
6.9

 
22.4

 
15.8

Income tax benefit
(3.7
)
 
(2.6
)
 
(7.6
)
 
(5.4
)
Total stock-based compensation expense, net of income taxes
$
7.2

 
$
4.3

 
$
14.8

 
$
10.4
Schedule of Stock Option Activity
The following summarizes option activity under Parent’s stock plans (in millions, except price per share and numbers of years):
 
Options
 
Weighted
Average
Exercise
Price
 
Weighted Average
Remaining
Contractual Term
(years)
 
Aggregate
Intrinsic
Value
Outstanding as of December 31, 2015
5.8

 
$
56.00

 
 
 
 
Granted
1.4

 
87.99

 
 
 
 
Exercised
(1.3
)
 
39.85

 
 
 
 
Canceled/forfeited
(0.6
)
 
71.56

 
 
 
 
Outstanding as of July 1, 2016
5.3

 
$
66.65

 
7
 
$
188.4

Vested and expected to vest as of July 1, 2016 (a)
5.1

 
$
65.89

 
7
 
$
184.3

Vested as of July 1, 2016
2.1

 
$
46.75

 
4
 
$
114.5
Schedule of Stock Unit Activity
The following summarizes information on unvested RSU and PSU activity (in millions; except price per share): 
 
Number of
RSUs/PSUs
 
Weighted Average
Grant-Date
Fair Value
Unvested as of December 31, 2015
1.1

 
$
72.24

Granted
0.4

 
86.31

Vested
(0.1
)
 
63.33

Forfeited
(0.2
)
 
74.55

Unvested as of July 1, 2016
1.2

 
$
77.01