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General (Narrative) (Details) - USD ($) $ in Millions | Apr. 03, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Operating lease, right-of-use asset | $ 827 |  | $ 764
Operating lease, liability | $ 860 |  | $ 797
ASU 2016-13 |  |  |
Effect of change in accounting principle on retained earnings |  | $ 8 |

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