Segments - Other Reportable Segment Items (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Information
Interest Expense	$ 492	$ 429	$ 1,457	$ 1,288
Operating Segments
Segment Information
Depreciation/amortization of non-acquired intangibles	451	434	1,293	1,290
Interest Income	190	173	528	516
Interest Expense	95	93	268	291
Operating Segments | Software
Segment Information
Depreciation/amortization of non-acquired intangibles	133	123	388	386
Interest Income	0	0	0	0
Interest Expense	0	0	0	0
Operating Segments | Consulting
Segment Information
Depreciation/amortization of non-acquired intangibles	20	22	61	75
Interest Income	0	0	0	0
Interest Expense	0	0	0	0
Operating Segments | Infrastructure
Segment Information
Depreciation/amortization of non-acquired intangibles	296	287	841	822
Interest Income	0	0	0	0
Interest Expense	0	0	0	0
Operating Segments | Financing
Segment Information
Depreciation/amortization of non-acquired intangibles	1	2	3	7
Interest Income	190	173	528	516
Interest Expense	$ 95	$ 93	$ 268	$ 291