Intangible Assets - Schedule of Intangible Assets by Class (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 21,595	$ 21,685
Accumulated Amortization	9,601	9,270
Net Book Value	11,994	12,415
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14,644	14,795
Accumulated Amortization	6,671	6,371
Net Book Value	7,973	8,424
Acquired software and technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,360	2,510
Accumulated Amortization	1,162	1,234
Net Book Value	1,198	1,276
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	635	633
Accumulated Amortization	310	295
Net Book Value	325	338
Purchased software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,109	1,146
Accumulated Amortization	605	595
Net Book Value	504	551
Capitalized software and other intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,847	2,601
Accumulated Amortization	853	775
Net Book Value	$ 1,994	$ 1,826