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STOCK-BASED AWARD PLANS (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]  
Share Based Compensation Expense By Award Type [Text Block] Stock-based compensation expense is as follows (in millions, except for weighted average years):
 
 
Total Stock-Based Compensation Expense
 
Unrecognized
stock-based
compensation expense
 
Weighted-average years to be recognized
 
 

Year Ended December 31,
 
 
 
2019
 
2018
 
2017
As of December 31, 2019
Restricted Stock Units
 
$
17

 
$
14

 
$
5

 
$
9

 
1.4
Performance Awards
 
$
6

 
$
5

 
$
2

 
$
6

 
1.7
Restricted Stock Awards
 
$
2

 
$
5

 
$
11

 
$
—

 
0.3
Tax benefit related to compensation expense
 
$
5

 
$
5

 
$
4

 
 
 
 
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
Changes in nonvested RSUs as of December 31, 2019 were as follows (in thousands, except per share amounts):
 
 
Number of Shares
 
Weighted-Average
Grant Date Fair Value
Nonvested at the beginning of the year
 
1,832

 
$
14.74

Granted
 
1,238

 
$
16.70

Vested
 
(691
)
 
$
14.46

Forfeited
 
(107
)
 
$
15.73

Nonvested at the end of the year
 
2,272

 
$
15.86
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The Monte Carlo valuation assumptions utilized for the TSR awards were:
 
2019
 
2018
Expected life (1)
2.82 years

 
2.82 years

Expected stock price volatility (2)
3.28
%
 
2.63
%
Risk-free interest rate (3)
2.48
%
 
2.38
%
Stock price (4)
$
16.35

 
$
14.80

(1)
Represents the remaining performance measurement period as of the valuation date.
(2)
Based on each entity’s historical stock price volatility over the remaining performance measurement period.
(3)
The risk free rate equals the yield, as of the grant date, on zero coupon US Treasury STRIPS that have a term equal to the length of the remaining performance measurement period.
(4)
The stock price is the closing price of our common stock on the grant date.
Share-based Payment Arrangement, Performance Shares, Activity [Table Text Block]
Changes in performance awards as of December 31, 2019 were as follows (in thousands, except per share amounts):
 
 
Number of Shares
 
Weighted-Average
Grant Date Fair Value
Nonvested at the beginning of the year
 
1,166

 
$
15.66

Granted
 
395

 
$
17.90

Vested
 
(368
)
 
$
15.11

Nonvested at the end of the year
 
1,193

 
$
16.57
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
Changes in nonvested restricted stock awards as of December 31, 2019 were as follows (in thousands, except per share amounts):
 
 
Number of Shares
 
Weighted-Average Grant Date Fair Value
Nonvested at the beginning of the year
 
727

 
$
15.90

Granted
 
6

 
$
17.64

Vested
 
(474
)
 
$
15.73

Forfeited
 
(17
)
 
$
16.21

Nonvested at the end of the year
 
242

 
$
16.26
Share-based Payment Arrangement, Option, Activity [Table Text Block]
The following table summarizes activity and balance information of the options under the Plan as of December 31, 2019:
 
 
Shares
 
Weighted-Average Exercise Price
 
Weighted-Average Remaining Contractual Term (Years)
 
Aggregate Intrinsic Value (2)
 
 
(in thousands, except per share amounts)
Outstanding at the beginning of the year
 
25

 
$
20.58

 
 
 
 
Granted
 
—

 
$
—

 
 
 
 
Exercised
 
—

 
$
—

 
 
 
 
Expired
 
—

 
$
—

 
 
 
 
Forfeited
 
—

 
$
—

 
 
 
 
Outstanding at the end of the year (1)
 
25

 
$
20.58

 
4.52
 
$
—

Options exercisable at year end
 
25

 
$
20.58

 
4.52
 
$
—