Other Comprehensive Income (Component of Other Comprehensive Income) - USD ($) $ in Millions  | 
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2022  | 
Jun. 30, 2021  | 
Jun. 30, 2022  | 
Jun. 30, 2021  | 
|
| Other Comprehensive Income (Loss), Net of Tax [Abstract] | ||||
| Foreign currency translation adjustments before tax | $ (145) | $ 10 | $ (206) | $ (62) | 
| Tax expense from foreign currency translation gain (loss) | 2 | (1) | 3 | (2) | 
| Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax | (143) | 9 | (203) | (64) | 
| Debt credit risk adjustment | 1 | (12) | ||
| Other Comprehensive Income (Loss), before Tax | (145) | 11 | (206) | (74) | 
| Other Comprehensive Income (Loss), Tax | 2 | (1) | 3 | (2) | 
| Other Comprehensive Income (Loss), Net of Tax | $ (143) | $ 10 | $ (203) | $ (76) | 
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- Definition Comprehensive Earnings (Loss) Attributable to Debt Credit Risk Adjustments No definition available. 
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| X | ||||||||||
- Definition Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Definition Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Definition Amount of tax expense (benefit), before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount before tax, after reclassification adjustments of other comprehensive income (loss). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- References No definition available. 
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| X | ||||||||||
- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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