Segments - Other Reportable Segment Items (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Information
Interest Expense	$ 455	$ 432
Operating Segments
Segment Information
Depreciation/amortization of non-acquired intangibles	409	424
Interest Income	176	180
Interest Expense	90	102
Operating Segments | Software
Segment Information
Depreciation/amortization of non-acquired intangibles	121	128
Interest Income	0	0
Interest Expense	0	0
Operating Segments | Consulting
Segment Information
Depreciation/amortization of non-acquired intangibles	21	27
Interest Income	0	0
Interest Expense	0	0
Operating Segments | Infrastructure
Segment Information
Depreciation/amortization of non-acquired intangibles	266	267
Interest Income	0	0
Interest Expense	0	0
Operating Segments | Financing
Segment Information
Depreciation/amortization of non-acquired intangibles	1	2
Interest Income	176	180
Interest Expense	$ 90	$ 102