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STOCK-BASED COMPENSATION PLANS (Tables) | 12 Months Ended
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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):
| 2020 |  | 2019 |  | 2018
Stock options | $ | 4 |  |  | $ | 3 |  |  | $ | 3 |
Stock awards | 14 |  |  | 21 |  |  | 23 |
Deferred stock awards | 1 |  |  | 1 |  |  | 1 |
Employee stock purchase plan | 15 |  |  | 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):
| Amount |  | Weighted-Average Period
Stock options | $ | 5 |  |  | 1.0
Stock awards | 31 |  |  | 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:
| 2020 |  | 2019 |  | 2018
Expected volatility | 34 | % |  | 30 | % |  | 30 | %
Expected term | 6 years |  | 6 years |  | 6 years
Risk-free interest rate | 1.03 | % |  | 2.41 | % |  | 2.61 | %
Expected dividend yield | 1.73 | % |  | 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:
| Shares |  | Weighted- Average Exercise Price Per Share |  | Weighted- Average Contractual Life (Years) |  | Aggregate Intrinsic Value (in millions)
Outstanding, December 31, 2019 | 794,055 |  |  | $ | 60.98 |  |  | 6.5 |  | $ | 7 |
Granted | 398,780 |  |  | 54.81 |  |  |  |  |
Exercised | (52,674) |  |  | 18.86 |  |  |  |  |
Canceled | (15,417) |  |  | 71.63 |  |  |  |  |
Forfeited or expired | (13,874) |  |  | 66.84 |  |  |  |  |
Outstanding, December 31, 2020 | 1,110,870 |  |  | $ | 60.54 |  |  | 6.8 |  | $ | 4 |
Exercisable, December 31, 2020 | 419,667 |  |  | $ | 60.56 |  |  | 4.6 |  | $ | 2 |
Vested or expected to vest, December 31, 2020 | 1,109,799 |  |  | $ | 60.54 |  |  | 6.8 |  | $ | 4 |
(in millions) | 2020 |  | 2019 |  | 2018
Intrinsic value of option exercises | $ | 2 |  |  | $ | 1 |  |  | $ | 1 |
Cash received from stock option exercises | — |  |  | 1 |  |  | 1 |
Fair value of options vested | 3 |  |  | 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 Value |  | Weighted- Average Contractual Life (Years) |  | Aggregate Intrinsic Value (in millions)
Non-vested, December 31, 2019 | 541,613 |  |  | $ | 71.82 |  |  | 1.4 |  | $ | 37 |
Granted | 926,418 |  |  | 49.22 |  |  |  |  |
Vested | (388,032) |  |  | 67.83 |  |  |  |  |
Forfeited | (112,955) |  |  | 54.39 |  |  |  |  |
Non-vested, December 31, 2020 | 967,044 |  |  | $ | 51.85 |  |  | 1.7 |  | $ | 50 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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