Other Comprehensive (Loss) Income (Schedule of Components of Accumulated Other Comprehensive (Loss) Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 10,749
Other comprehensive income (loss), net of tax	$ 179	$ (684)	259	$ (788)
Balance, end of period	12,139	10,917	12,139	10,917
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(5,234)	(4,679)	(5,314)	(4,575)
Other comprehensive (loss) income before reclassifications	176	(710)	253	(844)
Amounts reclassified from accumulated other comprehensive loss	3	26	6	56
Other comprehensive income (loss), net of tax	179	(684)	259	(788)
Balance, end of period	(5,055)	(5,363)	(5,055)	(5,363)
Pension/Post-Retirement Plans Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,766)	(3,137)	(2,721)	(3,202)
Other comprehensive (loss) income before reclassifications	(48)	154	(96)	189
Amounts reclassified from accumulated other comprehensive loss	3	26	6	56
Other comprehensive income (loss), net of tax	(45)	180	(90)	245
Balance, end of period	(2,811)	(2,957)	(2,811)	(2,957)
Deferred tax assets, net	1,370	1,424	1,370	1,424
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,468)	(1,542)	(2,593)	(1,373)
Other comprehensive (loss) income before reclassifications	224	(864)	349	(1,033)
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Other comprehensive income (loss), net of tax	224	(864)	349	(1,033)
Balance, end of period	(2,244)	(2,406)	(2,244)	(2,406)
Deferred tax assets, net		$ 13		$ 13
Deferred tax liabilities, net	$ 1		$ 1