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SHAREHOLDERS' EQUITY (Tables) | 3 Months Ended
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Mar. 31, 2019
Equity [Abstract] |
Schedule of Treasury Stock by Class | Share repurchase activity (in millions, except share amounts):
| Three Months Ended March 31,
| 2019 |  | 2018
| Shares |  | Amount |  | Shares |  | Amount
2015 Repurchase Program—$1 billion | 214,891 |  |  | $ | 13 |  |  | 185,661 |  |  | $ | 13 |
Schedule of Accumulated Other Comprehensive Income (Loss) | Components of accumulated other comprehensive loss, net of tax (in millions):
| March 31, 2019 |  | December 31, 2018
Related to marketable securities | $ | 1 |  |  | $ | (11 | )
Related to employee benefit plans | (434 | ) |  | (440 | )
Related to interest rate derivatives | — |  |  | 3 |
Total | $ | (433 | ) |  | $ | (448 | )

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