Taxes - Unrecognized Tax Benefits Reconciliation (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Taxes | |||
| Increase (decrease) in amount of unrecognized tax benefits | $ 387 | ||
| Reconciliation of the beginning and ending amount of unrecognized tax benefits | |||
| Balance at January 1 | 6,759 | $ 7,031 | $ 3,740 |
| Additions based on tax positions related to the current year | 816 | 394 | 3,029 |
| Additions for tax positions of prior years | 779 | 1,201 | 803 |
| Reductions for tax positions of prior years (including impacts due to a lapse of statute) | (922) | (1,686) | (367) |
| Settlements | (286) | (181) | (174) |
| Balance at December 31 | $ 7,146 | $ 6,759 | $ 7,031 |
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- References No definition available.
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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