Business Acquisitions (Details) - USD ($) $ in Millions							9 Months Ended
	Jul. 30, 2025	Jul. 28, 2025	Jul. 25, 2025	May 15, 2025	Apr. 23, 2025	Feb. 19, 2025	Sep. 30, 2025	Dec. 31, 2024
Business Combination [Line Items]
Goodwill							$ 21,336.7	$ 19,312.9
CentralReach
Business Combination [Line Items]
Aggregate purchase price					$ 1,850.0
Federal tax attributes					$ 200.0
Tax benefit utilization period (in years)					15 years
Goodwill					$ 1,049.0
Other identifiable intangibles					842.0
Deferred tax liabilities					84.0
Goodwill, expected tax deductible amount					590.0
CentralReach | Trade names
Business Combination [Line Items]
Intangible assets acquired, not subject to amortization					48.0
CentralReach | Customer related intangibles
Business Combination [Line Items]
Other identifiable intangibles					$ 776.0
Weighted average useful life of finite-lived intangible assets (in years)					19 years
CentralReach | Technology
Business Combination [Line Items]
Other identifiable intangibles					$ 66.0
Weighted average useful life of finite-lived intangible assets (in years)					6 years
Subsplash
Business Combination [Line Items]
Aggregate purchase price			$ 800.0
Goodwill			513.9
Other identifiable intangibles			365.1
Deferred tax liabilities			91.0
Subsplash | Trade names
Business Combination [Line Items]
Intangible assets acquired, not subject to amortization			26.0
Subsplash | Customer related intangibles
Business Combination [Line Items]
Other identifiable intangibles			$ 328.1
Weighted average useful life of finite-lived intangible assets (in years)			17 years
Subsplash | Technology
Business Combination [Line Items]
Other identifiable intangibles			$ 37.0
Weighted average useful life of finite-lived intangible assets (in years)			6 years
Muni-Link, Outgo, Orchard Software, Convoy, HerculesAI, SpectrumAi
Business Combination [Line Items]
Aggregate purchase price							648.5
Goodwill							448.0
Other identifiable intangibles							206.3
Goodwill, expected tax deductible amount							273.0
Muni-Link, Outgo, Orchard Software, Convoy, HerculesAI, SpectrumAi | Trade names
Business Combination [Line Items]
Intangible assets acquired, not subject to amortization							8.4
Muni-Link, Outgo, Orchard Software, Convoy, HerculesAI, SpectrumAi | Customer related intangibles
Business Combination [Line Items]
Other identifiable intangibles							$ 121.9
Weighted average useful life of finite-lived intangible assets (in years)							16 years 8 months 12 days
Muni-Link, Outgo, Orchard Software, Convoy, HerculesAI, SpectrumAi | Technology
Business Combination [Line Items]
Other identifiable intangibles							$ 84.4
Weighted average useful life of finite-lived intangible assets (in years)							7 years 6 months
MuniLink
Business Combination [Line Items]
Aggregate purchase price						$ 118.0
Federal tax attributes						$ 20.0
Outgo
Business Combination [Line Items]
Aggregate purchase price				$ 39.4
Equity consideration for business acquisition				$ 7.3
Orchard Software
Business Combination [Line Items]
Aggregate purchase price		$ 174.0
Convoy
Business Combination [Line Items]
Aggregate purchase price	$ 250.0
Federal tax attributes	$ 41.0
Tax benefit utilization period (in years)	15 years