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SHAREHOLDERS' EQUITY (Tables) | 6 Months Ended
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Jun. 30, 2017
Equity [Abstract] |
Schedule of Treasury Stock by Class | Share repurchase activity (in millions, except share amounts):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| Shares |  | Amount |  | Shares |  | Amount |  | Shares |  | Amount |  | Shares |  | Amount
2015 Repurchase Program—$1 billion | 256,680 |  |  | $ | 22 |  |  | 873,396 |  |  | $ | 67 |  |  | 256,680 |  |  | $ | 22 |  |  | 2,594,809 |  |  | $ | 193 |
Schedule of Accumulated Other Comprehensive Income (Loss) | Components of accumulated other comprehensive loss, net of tax (in millions):
| June 30, 2017 |  | December 31, 2016
Marketable securities | $ | — |  |  | $ | (3 | )
Employee benefit plans | (291 | ) |  | (299 | )
Interest rate derivatives | (3 | ) |  | (3 | )
Total | $ | (294 | ) |  | $ | (305 | )

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 + Details
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