Business Combinations - Indefinite-Lived Intangible Assets Acquired as Part of Business Combination (Details) - Several Individually Immaterial Acquisitions $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Business Acquisition [Line Items]
Total Other identifiable intangibles	$ 266
Customer relationships
Business Acquisition [Line Items]
Total Other identifiable intangibles	222
Software and related assets
Business Acquisition [Line Items]
Total Other identifiable intangibles	$ 6
Trade names
Business Acquisition [Line Items]
Amortization Period	5 years
Total Other identifiable intangibles	$ 6
Backlog
Business Acquisition [Line Items]
Amortization Period	4 years
Total Other identifiable intangibles	$ 27
Non-compete agreements
Business Acquisition [Line Items]
Total Other identifiable intangibles	3
Databases
Business Acquisition [Line Items]
Total Other identifiable intangibles	$ 2
Minimum | Customer relationships
Business Acquisition [Line Items]
Amortization Period	10 years
Minimum | Software and related assets
Business Acquisition [Line Items]
Amortization Period	3 years
Minimum | Non-compete agreements
Business Acquisition [Line Items]
Amortization Period	3 years
Minimum | Databases
Business Acquisition [Line Items]
Amortization Period
Maximum | Customer relationships
Business Acquisition [Line Items]
Amortization Period	16 years
Maximum | Software and related assets
Business Acquisition [Line Items]
Amortization Period	5 years
Maximum | Non-compete agreements
Business Acquisition [Line Items]
Amortization Period	5 years
Maximum | Databases
Business Acquisition [Line Items]
Amortization Period	5 years