Segments - Results of Continuing Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Information
Revenue	$ 15,770	$ 15,475	$ 30,231	$ 29,727
Segment profit	2,219	2,000	3,293	3,058
Operating Segments
Segment Information
Revenue	15,732	15,322	30,085	29,406
Segment profit	$ 3,306	$ 3,028	$ 5,633	$ 5,241
Revenue year-to-year change (as a percent)	2.70%		2.30%
Segment profit year-to-year change (as a percent)	9.20%		7.50%
Segment profit margin (as a percent)	21.00%	19.80%	18.70%	17.80%
Operating Segments | Software
Segment Information
Revenue	$ 6,739	$ 6,294	$ 12,637	$ 11,885
Segment profit	$ 2,113	$ 1,749	$ 3,612	$ 3,128
Revenue year-to-year change (as a percent)	7.10%		6.30%
Segment profit year-to-year change (as a percent)	20.80%		15.50%
Segment profit margin (as a percent)	31.30%	27.80%	28.60%	26.30%
Operating Segments | Consulting
Segment Information
Revenue	$ 5,179	$ 5,226	$ 10,365	$ 10,423
Segment profit	$ 463	$ 483	$ 888	$ 910
Revenue year-to-year change (as a percent)	(0.90%)		(0.60%)
Segment profit year-to-year change (as a percent)	(4.00%)		(2.40%)
Segment profit margin (as a percent)	8.90%	9.20%	8.60%	8.70%
Operating Segments | Infrastructure
Segment Information
Revenue	$ 3,645	$ 3,618	$ 6,721	$ 6,716
Segment profit	$ 654	$ 732	$ 965	$ 1,039
Revenue year-to-year change (as a percent)	0.70%		0.10%
Segment profit year-to-year change (as a percent)	(10.70%)		(7.10%)
Segment profit margin (as a percent)	17.90%	20.20%	14.40%	15.50%
Operating Segments | Financing
Segment Information
Revenue	$ 169	$ 185	$ 362	$ 380
Segment profit	$ 77	$ 64	$ 168	$ 164
Revenue year-to-year change (as a percent)	(8.30%)		(4.90%)
Segment profit year-to-year change (as a percent)	19.30%		2.40%
Segment profit margin (as a percent)	45.30%	34.80%	46.50%	43.20%