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STOCK-BASED COMPENSATION PLANS (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
The table below summarizes the components of total stock-based compensation (in millions):
 
2015
 
2014
 
2013
Stock options
$
2

 
$
3

 
$
3

Stock awards
11

 
10

 
10

Deferred stock awards
1

 
1

 
1

Employee stock purchase plan
3

 
2

 
2

Stock-based compensation
$
17

 
$
16

 
$
16

 
 
 
 
 
 
Tax benefit related to stock-based compensation
$
7

 
$
6

 
$
6
Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]
Unrecognized stock-based compensation for non-vested options and awards and the weighted-average period the expense will be recognized (in millions):
 
Amount
 
Weighted-
Average
Period
Stock options
$
3

 
1.0
Stock awards
8

 
0.7
Unrecognized stock-based compensation
$
11

 
0.7
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The fair value of each option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions used for grants:
 
2015
 
2014
 
2013
Expected volatility
53
%
 
65
%
 
67
%
Expected term
6 years

 
6 years

 
6 years

Risk-free interest rate
1.67
%
 
1.87
%
 
1.1
%
Expected dividend yield
1.25
%
 
1.25
%
 
—

Weighted-average grant date fair value per share
$
28.71

 
$
21.70

 
$
14.74

Estimated fair value of options granted (millions)
$
3

 
$
3

 
$
3
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
The tables below summarize stock option activity for the year ended December 31, 2015:
 
Shares
 
Weighted-
Average
Exercise
Price
Per Share
 
Weighted-
Average
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value (in
millions)
Outstanding, December 31, 2014
707,688

 
$
21.57

 
6.4
 
$
27

Granted
93,660

 
65.30

 
 
 
 
Exercised
(255,717
)
 
15.97

 
 
 
 
Canceled
(1
)
 
38.76

 
 
 
 
Forfeited or expired
(5,285
)
 
44.56

 
 
 
 
Outstanding, December 31, 2015
540,345

 
$
31.58

 
6.3
 
$
26

 
 
 
 
 
 
 
 
Exercisable, December 31, 2015
195,873

 
$
18.62

 
5.6
 
$
12

Vested or expected to vest, December 31, 2015
539,868

 
$
31.57

 
6.3
 
$
26


 (in millions)
2015
 
2014
 
2013
Intrinsic value of option exercises
$
14

 
$
20

 
$
19

Cash received from stock option exercises
4

 
6

 
8

Tax benefit related to stock option exercises
5

 
7

 
7

Fair value of options vested
3

 
2

 
3
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
The following table summarizes information about outstanding stock awards:
 
Number
of Units
 
Weighted-
Average
Grant
Date Fair
Value
 
Weighted-
Average
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value (in
millions)
Non-vested, December 31, 2014
1,027,390

 
$
26.19

 
0.6
 
$
61

Granted
244,874

 
50.94

 
 
 
 

Vested
(764,322
)
 
26.33

 
 
 
 

Forfeited
(37,227
)
 
35.86

 
 
 
 

Non-vested, December 31, 2015
470,715

 
$
38.09

 
0.8
 
$
38