Intangible Assets Including Goodwill - Intangible Assets by Class (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Intangible asset balances by major asset class
Gross Carrying Amount	$ 18,004	$ 17,588
Accumulated Amortization	(6,726)	(6,404)
Net Carrying Amount	11,278	11,184
Amount of foreign currency translation increase (decrease)	(41)	(198)
Capitalized software
Intangible asset balances by major asset class
Gross Carrying Amount	1,606	1,650
Accumulated Amortization	(734)	(705)
Net Carrying Amount	872	945
Client relationships
Intangible asset balances by major asset class
Gross Carrying Amount	8,946	8,559
Accumulated Amortization	(3,253)	(2,951)
Net Carrying Amount	5,693	5,608
Completed technology
Intangible asset balances by major asset class
Gross Carrying Amount	5,630	5,220
Accumulated Amortization	(2,321)	(2,045)
Net Carrying Amount	3,309	3,175
Patents/trademarks
Intangible asset balances by major asset class
Gross Carrying Amount	1,805	2,140
Accumulated Amortization	(404)	(688)
Net Carrying Amount	1,401	1,452
Other
Intangible asset balances by major asset class
Gross Carrying Amount	17	19
Accumulated Amortization	(15)	(15)
Net Carrying Amount	$ 2	$ 4