Other Comprehensive (Loss) Income (Schedule of Accumulated Other Comprehensive (Loss) Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 13,535
Other comprehensive income (loss), net of tax	344	$ (214)
Balance, end of period	14,268	12,622
Deferred tax assets, net	1,600	1,500
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(6,240)	(5,295)
Other comprehensive income (loss) before reclassifications	337	(218)
Amounts reclassified from accumulated other comprehensive income	7	4
Other comprehensive income (loss), net of tax	344	(214)
Balance, end of period	(5,896)	(5,509)
Pension/Post-Retirement Plans Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(3,408)	(3,101)
Other comprehensive income (loss) before reclassifications	(74)	33
Amounts reclassified from accumulated other comprehensive income	7	4
Other comprehensive income (loss), net of tax	(67)	37
Balance, end of period	(3,475)	(3,064)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,832)	(2,194)
Other comprehensive income (loss) before reclassifications	411	(251)
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive income (loss), net of tax	411	(251)
Balance, end of period	$ (2,421)	$ (2,445)