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Reclassifications from Accumulated Other Comprehensive Income - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Equity [Abstract]        
Losses reclassified from accumulated other comprehensive earnings/(losses) to net earnings $ 25 $ 62 $ 59 $ 166