Changes In Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Changes in accumulated other comprehensive income (loss), net of income taxes
Beginning of the period	$ 38,603
Other comprehensive income (loss)	(327)	$ 12
End of the period	38,810
Cumulative Foreign Currency Translation (Loss) Adjustments
Changes in accumulated other comprehensive income (loss), net of income taxes
Beginning of the period	(6,504)	(6,733)
Other comprehensive income (loss) before reclassifications	(386)	139
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive income (loss)	(386)	139
End of the period	(6,890)	(6,594)
Net Actuarial (Losses) and Prior Service (Costs) and Credits
Changes in accumulated other comprehensive income (loss), net of income taxes
Beginning of the period	(1,376)	(1,493)
Other comprehensive income (loss) before reclassifications	2	2
Amounts reclassified from accumulated other comprehensive income	2	0
Other comprehensive income (loss)	4	2
End of the period	(1,372)	(1,491)
Cumulative Gains (Losses) on Derivative Instruments Designated as Cash Flow Hedges and Other
Changes in accumulated other comprehensive income (loss), net of income taxes
Beginning of the period	41	175
Other comprehensive income (loss) before reclassifications	68	(42)
Amounts reclassified from accumulated other comprehensive income	(13)	(87)
Other comprehensive income (loss)	55	(129)
End of the period	$ 96	$ 46