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SHAREHOLDER'S EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Schedule of Treasury Stock by Class [Table Text Block] | Share repurchase activity (in millions, except shares):
| 2019 |  |  |  | 2018 |  |  |  | 2017 |  |
| Shares |  | Amount |  | Shares |  | Amount |  | Shares |  | Amount
2015 Repurchase Program – $1 billion |  | 1,192,820 |  |  | $ | 75 |  |  | 776,186 |  |  | $ | 50 |  |  | 981,277 |  |  | $ | 75 |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | AOCL consisted of the following (in millions, net of tax):
| 2019 |  | 2018
Related to marketable securities | $ | 9 |  |  | $ | (11) |
Related to employee benefit plans | (469) |  |  | (440) |
Related to interest rate derivatives | (5) |  |  | 3 |
| $ | (465) |  |  | $ | (448) |

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