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STOCK-BASED COMPENSATION PLANS (TABLES)
 12 Months Ended
Dec. 31, 2013
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 for the years ended December 31 (in millions):
 
2013
 
2012
 
2011
Stock options
$
3

 
$
2

 
$
3

Stock awards
10

 
11

 
8

Deferred stock awards
1

 
1

 
—

Employee stock purchase plan
2

 
1

 
1

Stock-based compensation
$
16

 
$
15

 
$
12

 
 
 
 
 
 
Tax benefit related to stock-based compensation
$
6

 
$
5

 
$
4
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 for the year ended December 31, 2013 (in millions):
 
Amount
 
Weighted-
Average
Period
Stock options
$
2

 
0.6
Stock awards
7

 
0.7
Unrecognized stock-based compensation
$
9

 
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 in the years ended December 31:
 
2013
 
2012
 
2011
Expected volatility
67
%
 
55
%
 
56
%
Expected term
6 years

 
6 years

 
6 years

Risk-free interest rate
1.10
%
 
1.08
%
 
2.26
%
Expected dividend yield
—

 
—

 
—

Weighted-average grant date fair value per share
$
29.47

 
$
17.23

 
$
16.40

Estimated fair value of options granted (millions)
$
3

 
$
2

 
$
2
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
The tables below summarize stock option activity for the year ended December 31, 2013:
 
Shares
 
Weighted-
Average
Exercise
Price
Per Share
 
Weighted-
Average
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value (in
millions)
Outstanding, December 31, 2012
941,724

 
$
20.99

 
6.2
 
$
21

Granted
96,590

 
48.96

 
 
 
 
Exercised
(462,976
)
 
17.43

 
 
 
 
Forfeited or expired
(3,496
)
 
32.64

 
 
 
 
Outstanding, December 31, 2013
571,842

 
$
28.51

 
6.6
 
$
26

 
 
 
 
 
 
 
 
Exercisable, December 31, 2013
264,823

 
$
19.82

 
5.4
 
$
14

Vested or expected to vest, December 31, 2013
571,473

 
$
28.51

 
6.6
 
$
26


 (in millions)
2013
 
2012
 
2011
Intrinsic value of option exercises
$
19

 
$
11

 
$
20

Cash received from stock option exercises
8

 
7

 
17

Tax benefit related to stock option exercises
7

 
4

 
8

Fair value of options vested
3

 
4

 
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, 2012
754,293

 
$
28.06

 
0.6
 
$
33

Granted
208,110

 
49.10

 
 
 
 

Vested
(314,828
)
 
19.29

 
 
 
 

Forfeited
(8,360
)
 
33.66

 
 
 
 

Non-vested, December 31, 2013
639,215

 
$
39.15

 
0.6
 
$
47