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Taxes on Income - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Disclosure [Abstract] |  |  |  |
Income tax expense (benefit) related to the TCJA |  | $ 149 |  |
Income tax expense (benefit) from repatriation of foreign earnings related to the TCJA |  | 173 |  |
Income tax expense (benefit) from change in tax rate related to the TCJA |  | (24) |  |
Undistributed earnings of foreign subsidiaries for income tax purposes | $ 3,200 |  |  |
Undistributed earnings of foreign subsidiaries reinvested indefinitely | 776 |  |  |
Net income tax payments | 659 | 558 | $ 709 |
Operating loss carryforwards | 689 |  |  |
Total amount of federal, state and local, and foreign unrecognized tax benefits excluding interest and penalties | 124 | 147 | $ 212 | $ 221
Net increase (decrease) in tax expense from change in unrecognized tax benefits | 10 |  |  |
Decrease in unrecognized tax benefits reasonably possible | 10 |  |  |
Accrued interest and penalties associated with uncertain tax positions | $ 20 | $ 35 |  |

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