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STOCK-BASED COMPENSATION PLANS (TABLES)
 12 Months Ended
Dec. 31, 2014
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):
 
2014
 
2013
 
2012
Stock options
$
3

 
$
3

 
$
2

Stock awards
10

 
10

 
11

Deferred stock awards
1

 
1

 
1

Employee stock purchase plan
2

 
2

 
1

Stock-based compensation
$
16

 
$
16

 
$
15

 
 
 
 
 
 
Tax benefit related to stock-based compensation
$
6

 
$
6

 
$
5
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
$
2

 
0.8
Stock awards
8

 
0.6
Unrecognized stock-based compensation
$
10

 
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:
 
2014
 
2013
 
2012
Expected volatility
65
%
 
67
%
 
55
%
Expected term
6 years

 
6 years

 
6 years

Risk-free interest rate
1.87
%
 
1.10
%
 
1.08
%
Expected dividend yield
1.25

 
—

 
—

Weighted-average grant date fair value per share
$
21.70

 
$
14.74

 
$
8.62

Estimated fair value of options granted (millions)
$
3

 
$
3

 
$
2
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
The tables below summarize stock option activity:
 
Shares
 
Weighted-
Average
Exercise
Price
Per Share
 
Weighted-
Average
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value (in
millions)
Outstanding, December 31, 2013
1,143,684

 
$
14.25

 
6.6
 
$
26

Granted
143,050

 
40.01

 
 
 
 
Exercised
(573,140
)
 
11.39

 
 
 
 
Forfeited or expired
(5,906
)
 
38.76

 
 
 
 
Outstanding, December 31, 2014
707,688

 
$
21.57

 
6.4
 
$
27

 
 
 
 
 
 
 
 
Exercisable, December 31, 2014
243,726

 
$
12.32

 
5.4
 
$
12

Vested or expected to vest, December 31, 2014
706,748

 
$
21.56

 
6.4
 
$
27


 (in millions)
2014
 
2013
 
2012
Intrinsic value of option exercises
$
20

 
$
19

 
$
11

Cash received from stock option exercises
6

 
8

 
7

Tax benefit related to stock option exercises
7

 
7

 
4

Fair value of options vested
2

 
3

 
4
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, 2013
1,278,430

 
$
19.58

 
0.6
 
$
47

Granted
400,650

 
31.85

 
 
 
 

Vested
(630,390
)
 
16.53

 
 
 
 

Forfeited
(21,300
)
 
19.48

 
 
 
 

Non-vested, December 31, 2014
1,027,390

 
$
26.19

 
0.6
 
$
61