Other Comprehensive Income (Loss) (Schedule of Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 11,222
Other comprehensive loss, net of tax	$ (685)	$ (192)	(1,473)	$ (235)
Balance, end of period	9,791	9,888	9,791	9,888
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(5,363)	(5,153)	(4,575)	(5,110)
Other comprehensive income (loss) before reclassifications	(713)	(231)	(1,557)	(350)
Amounts reclassified from accumulated other comprehensive income	28	39	84	115
Other comprehensive loss, net of tax	(685)	(192)	(1,473)	(235)
Balance, end of period	(6,048)	(5,345)	(6,048)	(5,345)
Pension/Post-Retirement Plans Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,957)	(4,102)	(3,202)	(4,126)
Other comprehensive income (loss) before reclassifications	182	115	371	63
Amounts reclassified from accumulated other comprehensive income	28	39	84	115
Other comprehensive loss, net of tax	210	154	455	178
Balance, end of period	(2,747)	(3,948)	(2,747)	(3,948)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,406)	(1,051)	(1,373)	(984)
Other comprehensive income (loss) before reclassifications	(895)	(346)	(1,928)	(413)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Other comprehensive loss, net of tax	(895)	(346)	(1,928)	(413)
Balance, end of period	$ (3,301)	$ (1,397)	$ (3,301)	$ (1,397)