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STOCK-BASED COMPENSATION PLANS (Tables)
 12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [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):
202020192018
Stock options$4 $3 $3 
Stock awards14 21 23 
Deferred stock awards1 1 1 
Employee stock purchase plan15 11 9 
Stock-based compensation$34 $36 $36 
Tax benefit related to stock-based compensation$8 $9 $9 
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 (dollars in millions):
AmountWeighted-Average
Period
Stock options$5 1.0
Stock awards31 1.8
Unrecognized stock-based compensation$36 1.7
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:
 202020192018
Expected volatility34 %30 %30 %
Expected term6 years6 years6 years
Risk-free interest rate1.03 %2.41 %2.61 %
Expected dividend yield1.73 %2.09 %1.94 %
Weighted-average grant date fair value per share$14.11 $16.84 $17.18 
Estimated fair value of options granted (millions)$6 $4 $1 
Share-based Compensation, Stock Options, Activity [Table Text Block]
The tables below summarize stock option activity for the year ended December 31, 2020:
 SharesWeighted-
Average Exercise Price Per Share		Weighted-
Average
Contractual Life (Years)		Aggregate Intrinsic
Value
(in millions)
Outstanding, December 31, 2019794,055 $60.98 6.5$7 
Granted398,780 54.81   
Exercised(52,674)18.86   
Canceled(15,417)71.63 
Forfeited or expired(13,874)66.84   
Outstanding, December 31, 20201,110,870 $60.54 6.8$4 
Exercisable, December 31, 2020419,667 $60.56 4.6$2 
Vested or expected to vest, December 31, 20201,109,799 $60.54 6.8$4 

 (in millions)202020192018
Intrinsic value of option exercises$2 $1 $1 
Cash received from stock option exercises— 1 1 
Fair value of options vested3 3 2 
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 ValueWeighted-
Average
Contractual
Life (Years)		Aggregate
Intrinsic
Value (in
millions)
Non-vested, December 31, 2019541,613 $71.82 1.4$37 
Granted926,418 49.22   
Vested(388,032)67.83   
Forfeited(112,955)54.39   
Non-vested, December 31, 2020967,044 $51.85 1.7$50