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BASIS OF PRESENTATION Operating Leases (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Jan. 01, 2019
Operating Leased Assets [Line Items] |  |
Goodwill acquired | $ 118 |
Cumulative effect of change in accounting standards |  | $ 17
Operating lease right-of-use assets | 746 |
Operating lease liabilities | 762 |
Accounting Standards Update 2016-02 |  |
Operating Leased Assets [Line Items] |  |
Operating lease right-of-use assets | 734 |
Operating lease liabilities | $ 749 |
Retained Earnings |  |
Operating Leased Assets [Line Items] |  |
Cumulative effect of change in accounting standards |  | 12
Retained Earnings | Accounting Standards Update 2016-02 |  |
Operating Leased Assets [Line Items] |  |
Cumulative effect of change in accounting standards |  | $ 12

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