Accounting Policies - Narrative (Details)		12 Months Ended
	May 02, 2023 USD ($)	Dec. 31, 2023 USD ($) segment reporting_unit	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items]
Number of reportable segments | segment		6
Loss (gain) on dispositions		$ 70,000,000	$ (1,898,000,000)	$ (11,000,000)
Total revenue		(12,497,000,000)	(11,181,000,000)	(8,297,000,000)
Contract assets		75,000,000	60,000,000
Revenues recognized		2,800,000,000
Capitalized contract costs		$ 234,000,000	175,000,000
Capitalized contract cost amortization period		5 years
Market value of cash and cash equivalents		$ 1,290,000,000	1,286,000,000
Restricted cash		1,000,000	1,000,000
Gross deferred technology costs		303,000,000	259,000,000
Accumulated amortization of deferred technology costs		194,000,000	190,000,000
Fair value of our long-term debt borrowings		$ 10,300,000,000	9,300,000,000
Option to extend lease period		15 years
Period of options to terminate lease		1 year
Number of reporting units | reporting_unit		5
Goodwill impairment loss		$ 0	0	0
Impairment of intangible assets		0	0	0
Cost of advertisement		209,000,000	177,000,000	39,000,000
Undistributed accumulated earnings of foreign subsidiary		7,100,000,000
Undistributed earnings of foreign subsidiaries reinvested indefinitely		$ 4,300,000,000
OSTTRA | Corporate Joint Venture
Property, Plant and Equipment [Line Items]
Ownership interest of subsidiary (as a percent)		50.00%
Noncontrolling interest ownership by noncontrolling owners (as a percent)		50.00%
Minimum
Property, Plant and Equipment [Line Items]
Remaining lease terms		1 year
Minimum | Software and Software Development Costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		3 years
Minimum | Building and Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		15 years
Minimum | Equipment and Furniture
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		2 years
Maximum
Property, Plant and Equipment [Line Items]
Remaining lease terms		10 years
Maximum | Software and Software Development Costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		7 years
Maximum | Building and Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		40 years
Maximum | Equipment and Furniture
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		10 years
Non-transaction
Property, Plant and Equipment [Line Items]
Total revenue		$ (1,730,000,000)	(1,640,000,000)	(1,698,000,000)
Elimination
Property, Plant and Equipment [Line Items]
Total revenue		177,000,000	169,000,000	146,000,000
Elimination | Non-transaction
Property, Plant and Equipment [Line Items]
Total revenue		177,000,000	$ 169,000,000	146,000,000
Sale
Property, Plant and Equipment [Line Items]
Loss (gain) on dispositions		70,000,000		$ (11,000,000)
Sale | Engineering Solutions Business
Property, Plant and Equipment [Line Items]
Divestiture consideration	$ 975,000,000
Proceeds from divestiture of business	$ 750,000,000
Loss (gain) on dispositions		120,000,000
Disposition related costs		16,000,000
Gain (loss) on disposition after tax		(182,000,000)
Release of deferred tax liabilities		$ 157,000,000