Intangible Assets - Schedule of Intangible Assets by Class (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 21,935	$ 21,685
Accumulated Amortization	10,156	9,270
Net Book Value	11,779	12,415
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14,703	14,795
Accumulated Amortization	7,035	6,371
Net Book Value	7,668	8,424
Acquired software and technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,365	2,510
Accumulated Amortization	1,244	1,234
Net Book Value	1,121	1,276
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	636	633
Accumulated Amortization	326	295
Net Book Value	310	338
Purchased software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,223	1,146
Accumulated Amortization	619	595
Net Book Value	604	551
Capitalized software and other intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,008	2,601
Accumulated Amortization	932	775
Net Book Value	$ 2,076	$ 1,826