Other Comprehensive Earnings/Losses (Reclassifications) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit income, excluding service cost	$ (127)	$ (184)	$ (202)
(Income) losses from investments in equity securities	(493)	2,186	5,979
Pre-tax amounts reclassified from accumulated other comprehensive losses to net earnings	(8,130)	(5,764)	(2,475)
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	13	2	81
Reclassification out of Accumulated Other Comprehensive Income [Member] | Benefit Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit income, excluding service cost	(26)	88	122
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit income, excluding service cost	8	127	163
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 benefit income, excluding service cost	(34)	(39)	(41)
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	39	(85)	(76)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Currency Translation Adjustments and Other [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Income) losses from investments in equity securities	$ 0	$ (1)	$ 35