Other Comprehensive Earnings/Losses (Changes in Each Component of Accumulated Other Comprehensive Losses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ (3,923)	$ (1,606)
Other comprehensive earnings (losses), net of deferred income taxes	(8)	94
Ending balance	(3,826)	(1,760)
Accumulated Other Comprehensive Losses [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(2,771)	(3,056)
Other comprehensive earnings (losses) before reclassifications	(8)	139
Deferred income taxes	5	(32)
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(3)	107
Amounts reclassified to net earnings	(7)	(14)
Deferred income taxes	2	1
Amounts reclassified to net earnings, net of deferred income taxes	(5)	(13)
Other comprehensive earnings (losses), net of deferred income taxes	(8)	94
Ending balance	(2,779)	(2,962)
Benefit Plans [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(1,436)	(1,612)
Other comprehensive earnings (losses) before reclassifications	0	0
Deferred income taxes	0	0
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	0	0
Amounts reclassified to net earnings	(8)	21
Deferred income taxes	2	(6)
Amounts reclassified to net earnings, net of deferred income taxes	(6)	15
Other comprehensive earnings (losses), net of deferred income taxes	(6)	15
Ending balance	(1,442)	(1,597)
ABI [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(1,369)	(1,512)
Other comprehensive earnings (losses) before reclassifications	(18)	138
Deferred income taxes	5	(32)
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(13)	106
Amounts reclassified to net earnings	1	(35)
Deferred income taxes	0	7
Amounts reclassified to net earnings, net of deferred income taxes	1	(28)
Other comprehensive earnings (losses), net of deferred income taxes	(12)	78
Ending balance	(1,381)	(1,434)
Currency Translation Adjustments and Other [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	34	68
Other comprehensive earnings (losses) before reclassifications	10	1
Deferred income taxes	0	0
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	10	1
Amounts reclassified to net earnings	0	0
Deferred income taxes	0	0
Amounts reclassified to net earnings, net of deferred income taxes	0	0
Other comprehensive earnings (losses), net of deferred income taxes	10	1
Ending balance	$ 44	$ 69