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STOCK INCENTIVE PLANS (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares of common stock available for grant under stock incentive plans (in shares) | 2,500,000 |  |
Pretax stock-based compensation expense | $ 47 | $ 33 | $ 36
Income tax benefits recognized in earnings for stock-based compensation expense | $ 26 | $ 26 | $ 12
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |
Outstanding at January 1 (in shares) | 1,933,713 | 2,124,036 | 2,226,286
Granted (in shares) | 204,250 | 306,206 | 294,874
Exercised (in shares) | (931,929) | (409,269) | (317,110)
Canceled or expired (in shares) | (72,931) | (87,260) | (80,014)
Outstanding at December 31 (in shares) | 1,133,103 | 1,933,713 | 2,124,036
Weighted Average Price Per Share [Abstract] |  |  |
Outstanding at January 1, weighted average price per share (in dollars per share) | $ 207.10 | $ 186.59 | $ 169.96
Granted, weighted average price per share (in dollars per share) | 276.64 | 230.97 | 234.25
Exercised, weighted average price per share (in dollars per share) | 193.68 | 115.35 | 108.28
Canceled or expired, weighted average price per share (in dollars per share) | 226.48 | 222.00 | 210.01
Outstanding at December 31, weighted average price per share (in dollars per share) | $ 229.42 | $ 207.10 | $ 186.59
Options exercisable outstanding at January 1 (in shares) | 1,375,844 | 1,346,707 | 1,411,460
Options exercisable outstanding at December 31 (in shares) | 581,534 | 1,375,844 | 1,346,707
Stock Options Exercised [Abstract] |  |  |
Fair value of options exercised | $ 38 | $ 11 | $ 8
Total intrinsic value of options exercised | 102 | 47 | 36
Fair value of options vested | 8 | 24 | 15
Proceeds from stock options exercised | $ 180 | $ 47 | $ 35
Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting period | 3 years |  |
Expiration period | 10 years |  |
Stock Options Exercised [Abstract] |  |  |
Unrecognized compensation | $ 9 |  |
Weighted average period to recognize (in years) | 1 year 10 months 24 days |  |

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