CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 1,216	$ 1,055
Other comprehensive income/(loss), before tax:
Foreign currency translation adjustments	136	(343)
Net unrealized gains/(losses) on available-for-sale securities	0	8
Unrealized gains/(losses) on cash flow hedges:
Unrealized gains/(losses) arising during the period	(175)	(58)
Reclassification of (gains)/losses to net income	342	(323)
Total unrealized gains/(losses) on cash flow hedges	167	(382)
Retirement-related benefit plans:
Prior service costs/(credits)	0	0
Net gains/(losses) arising during the period	1	0
Curtailments and settlements	2	2
Amortization of prior service costs/(credits)	9	(2)
Amortization of net (gains)/losses	198	151
Total retirement-related benefit plans	209	151
Other comprehensive income/(loss), before tax	512	(566)
Income tax (expense)/benefit related to items of other comprehensive income	(213)	259
Other comprehensive income/(loss), net of tax	299	(306)
Total comprehensive income	$ 1,514	$ 749