Intangible Assets Including Goodwill - Intangible Assets by Class (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Intangible asset balances by major asset class
Gross Carrying Amount	$ 16,880	$ 17,588
Accumulated Amortization	(5,976)	(6,404)
Net Carrying Amount	10,905	11,184
Amount of foreign currency translation increase (decrease)	30	(198)
Capitalized software
Intangible asset balances by major asset class
Gross Carrying Amount	1,638	1,650
Accumulated Amortization	(675)	(705)
Net Carrying Amount	962	945
Client relationships
Intangible asset balances by major asset class
Gross Carrying Amount	8,327	8,559
Accumulated Amortization	(2,890)	(2,951)
Net Carrying Amount	5,438	5,608
Completed technology
Intangible asset balances by major asset class
Gross Carrying Amount	5,097	5,220
Accumulated Amortization	(2,025)	(2,045)
Net Carrying Amount	3,073	3,175
Patents/trademarks
Intangible asset balances by major asset class
Gross Carrying Amount	1,799	2,140
Accumulated Amortization	(370)	(688)
Net Carrying Amount	1,429	1,452
Other**
Intangible asset balances by major asset class
Gross Carrying Amount	19	19
Accumulated Amortization	(15)	(15)
Net Carrying Amount	$ 4	$ 4