Intangible Assets Including Goodwill - Goodwill by Segment (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Changes in Goodwill Balances
Beginning Balance	$ 67,717	$ 60,706
Goodwill Additions	7,225	5,912
Purchase Price Adjustments	(17)	1
Divestitures	0	0
Foreign Currency Translation and Other Adjustments	(217)	1,098
Ending Balance	74,709	67,717
Goodwill impairment losses	0	0
Goodwill accumulated impairment losses	0	0
Software
Changes in Goodwill Balances
Beginning Balance	52,987	47,136
Goodwill Additions	7,136	5,004
Purchase Price Adjustments	1	(8)
Divestitures	0	0
Foreign Currency Translation and Other Adjustments	(175)	855
Ending Balance	59,950	52,987
Consulting
Changes in Goodwill Balances
Beginning Balance	10,341	9,206
Goodwill Additions	89	908
Purchase Price Adjustments	(18)	10
Divestitures	0	0
Foreign Currency Translation and Other Adjustments	(36)	217
Ending Balance	10,376	10,341
Infrastructure
Changes in Goodwill Balances
Beginning Balance	4,389	4,363
Goodwill Additions	0	0
Purchase Price Adjustments	1	0
Divestitures	0	0
Foreign Currency Translation and Other Adjustments	(6)	26
Ending Balance	4,383	4,389
Other
Changes in Goodwill Balances
Beginning Balance	0	0
Goodwill Additions	0	0
Purchase Price Adjustments	0	0
Divestitures	0	0
Foreign Currency Translation and Other Adjustments	0	0
Ending Balance	$ 0	$ 0