Other Comprehensive Earnings/Losses (Changes in Each Component of Accumulated Other Comprehensive Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ (2,188)	$ (3,490)	$ (3,923)
Other comprehensive earnings (losses), net of deferred income taxes	(227)	273	98
Ending balance	(3,452)	(2,188)	(3,490)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(2,400)	(2,673)	(2,771)
Other comprehensive earnings (losses) before reclassifications	(272)	115	102
Deferred income taxes	64	(37)	(17)
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(208)	78	85
Amounts reclassified to net earnings	(24)	244	13
Deferred income taxes	5	(49)	0
Amounts reclassified to net earnings, net of deferred income taxes	(19)	195	13
Other comprehensive earnings (losses), net of deferred income taxes	(227)	273	98
Ending balance	(2,627)	(2,400)	(2,673)
Benefit Plans [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(1,392)	(1,493)	(1,436)
Other comprehensive earnings (losses) before reclassifications	(39)	142	(48)
Deferred income taxes	9	(36)	9
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(30)	106	(39)
Amounts reclassified to net earnings	9	(7)	(26)
Deferred income taxes	(2)	2	8
Amounts reclassified to net earnings, net of deferred income taxes	7	(5)	(18)
Other comprehensive earnings (losses), net of deferred income taxes	(23)	101	(57)
Ending balance	(1,415)	(1,392)	(1,493)
ABI [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(1,018)	(1,195)	(1,369)
Other comprehensive earnings (losses) before reclassifications	(228)	(22)	178
Deferred income taxes	55	(1)	(35)
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(173)	(23)	143
Amounts reclassified to net earnings	(33)	251	39
Deferred income taxes	7	(51)	(8)
Amounts reclassified to net earnings, net of deferred income taxes	(26)	200	31
Other comprehensive earnings (losses), net of deferred income taxes	(199)	177	174
Ending balance	(1,217)	(1,018)	(1,195)
Currency Translation Adjustments and Other [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	10	15	34
Other comprehensive earnings (losses) before reclassifications	(5)	(5)	(28)
Deferred income taxes	0	0	9
Other comprehensive earnings (losses) before reclassifications, net of deferred income taxes	(5)	(5)	(19)
Amounts reclassified to net earnings	0	0	0
Deferred income taxes	0	0	0
Amounts reclassified to net earnings, net of deferred income taxes	0	0	0
Other comprehensive earnings (losses), net of deferred income taxes	(5)	(5)	(19)
Ending balance	$ 5	$ 10	$ 15