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Other Comprehensive Earnings/Losses (Reclassifications) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Net periodic defined benefits expense (reversal of expense) $ (184) $ (202) $ (77)
(Income) losses from investments in equity securities 2,186 5,979 211
Pre-tax amounts reclassified from accumulated other comprehensive losses to net earnings (5,764) (2,475) (4,454)
Reclassification out of Accumulated Other Comprehensive Income [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Pre-tax amounts reclassified from accumulated other comprehensive losses to net earnings 2 81 169
Reclassification out of Accumulated Other Comprehensive Income [Member] | Benefit Plans [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Net periodic defined benefits expense (reversal of expense) 88 122 148
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net loss [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Net periodic defined benefits expense (reversal of expense) 127 163 173
Reclassification out of Accumulated Other Comprehensive Income [Member] | Prior service costs/credit [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Net periodic defined benefits expense (reversal of expense) (39) (41) (25)
Reclassification out of Accumulated Other Comprehensive Income [Member] | ABI [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
(Income) losses from investments in equity securities (85) (76) 21
Reclassification out of Accumulated Other Comprehensive Income [Member] | Currency Translation Adjustments and Other [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Currency translation adjustments and other $ (1) $ 35 $ 0