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STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Common stock issuances |  |  |
Balance at the beginning of the year (in shares) | 893,469,000 | 892,215,000 | 891,360,000
Issued (in shares) | 1,628,000 | 1,252,000 | 843,000
Options exercised and other, net (in shares) | 19,000 | 2,000 | 12,000
Balance at the end of the year (in shares) | 895,116,000 | 893,469,000 | 892,215,000
TREASURY STOCK |  |  |
Share repurchase program, authorized shares | 185,000,000 |  |
Share repurchase program, shares yet to be repurchased | 46,900,000 |  |
Shares purchased under share repurchase program | 16,900,000 | 0 | 0
Share repurchase program, average cost per share of shares repurchased during period (in dollars per share) | $ 74.92 |  |
Treasury stock, shares (in shares) | 145,726,051 | 128,364,195 | 128,000,000
NONREDEEMABLE PREFERRED STOCK |  |  |
Preferred stock, authorized shares (in shares) | 50,000,000 | 50,000,000 | 50,000,000
Preferred stock, par value (in dollars per share) | $ 1.00 | $ 1.00 | $ 1.00
Preferred stock, shares outstanding (in shares) | 0 | 0 | 0
Basic earnings per common share |  |  |
Income (loss) from continuing operations | $ 4,131 | $ 1,311 | $ (1,002)
Income (loss) from continuing operations attributable to common stock | 4,131 | 1,311 | (1,002)
Income from discontinued operations | 0 | 0 | 428
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK | 4,131 | 1,311 | (574)
Less: Net income allocated to participating securities | (17) | (6) | 0
Net income (loss), net of participating securities | $ 4,114 | $ 1,305 | $ (574)
Weighted average number of basic shares (in shares) | 761,700,000 | 765,100,000 | 763,800,000
Basic earnings (loss) per common share (in dollars per share) | $ 5.40 | $ 1.71 | $ (0.75)
Diluted EPS |  |  |
Net income (loss), net of participating securities | $ 4,114 | $ 1,305 | $ (574)
Weighted average number of basic shares (in shares) | 761,700,000 | 765,100,000 | 763,800,000
Dilutive securities (in shares) | 1,600,000 | 800,000 | 0
Total diluted weighted average common shares (in shares) | 763,300,000 | 765,900,000 | 763,800,000
Diluted earnings (loss) per common share (in dollars per share) | $ 5.39 | $ 1.70 | $ (0.75)
ACCUMULATED OTHER COMPREHENSIVE LOSS |  |  |
Accumulated other comprehensive loss | $ (172) | $ (258) |
Foreign currency translation adjustments |  |  |
ACCUMULATED OTHER COMPREHENSIVE LOSS |  |  |
Accumulated other comprehensive loss | (7) | (7) |
Unrealized gains on derivatives |  |  |
ACCUMULATED OTHER COMPREHENSIVE LOSS |  |  |
Accumulated other comprehensive loss | 5 | 0 |
Pension and postretirement adjustments |  |  |
ACCUMULATED OTHER COMPREHENSIVE LOSS |  |  |
Accumulated other comprehensive loss | $ (170) | $ (251) |

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