Ryan Specialty Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Mergers and Acquisitions - Narrative (Details)

Mergers and Acquisitions - Narrative (Details) $ in Millions											3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 01, 2025 USD ($)	May 16, 2025 USD ($)	May 01, 2025 USD ($)	Feb. 03, 2025 USD ($)	Nov. 04, 2024 USD ($) managingGeneralUnderwriter	Oct. 01, 2024 USD ($)	Sep. 13, 2024 USD ($) program	Sep. 01, 2024 USD ($)	Aug. 30, 2024 USD ($)	May 01, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Business Combination [Line Items]
Acquisition related costs											$ 0.3	$ 5.3	$ 11.8	$ 11.4
Acquiree's revenue since acquisition date											23.2	24.5	78.5	33.8
Estimated tax deductible goodwill											39.3	545.6	39.3	545.6
Increase (decrease) of income tax expense related to the common control reorganization													(48.0)	59.4
Increase (decrease) in financing costs and interest expense												(18.1)		47.2
Increase (decrease) of amortization expense on acquired intangible assets											(6.3)	$ 23.4	(7.7)	96.0
Increase (decrease) in transaction costs													(11.1)	13.6
Decrease in tax expenses related to pro forma adjustments														$ 12.9
2025 Acquisitions
Business Combination [Line Items]
Contingent consideration liabilities											44.1		$ 44.1
2025 Acquisitions \| Minimum
Business Combination [Line Items]
Contingent consideration period													2 years
2025 Acquisitions \| Maximum
Business Combination [Line Items]
Contingent consideration period													5 years
Velocity Risk Underwriters, LLC
Business Combination [Line Items]
Cash consideration for acquisition				$ 548.6
Contingent consideration liabilities				$ 19.6
Measurement period adjustment, contingent consideration													$ 1.5
Measurement period adjustment, other current assets													1.5
Measurement period adjustments, working capital													0.9
Measurement period adjustments increase (decrease), goodwill													0.9
USQRisk Holdings, LLC
Business Combination [Line Items]
Cash consideration for acquisition			$ 28.7
Contingent consideration liabilities			$ 23.8
360° Underwriting
Business Combination [Line Items]
Cash consideration for acquisition		$ 28.2
Contingent consideration liabilities		$ 0.6
J.M. Wilson Corporation
Business Combination [Line Items]
Cash consideration for acquisition	$ 67.8
Equity consideration for acquisition	$ 20.4
Castel Underwriting Agencies Limited
Business Combination [Line Items]
Cash consideration for acquisition										$ 247.6
Measurement period adjustments, working capital															$ 0.5
Measurement period adjustments increase (decrease), goodwill															(2.0)
Contingently returnable consideration										4.9
Measurement period adjustments, deferred tax liabilities															1.6
Measurement period adjustments, taxes payable															0.9
Castel Underwriting Agencies Limited \| Class A Common Stock
Business Combination [Line Items]
Equity consideration for acquisition										$ 2.2
US Assure Insurance Services of Florida, Inc.
Business Combination [Line Items]
Cash consideration for acquisition									$ 1,079.8
Contingent consideration liabilities									$ 103.8
Measurement period adjustments increase (decrease), goodwill															5.2
Greenhill Underwriting Insurance Services, LLC
Business Combination [Line Items]
Cash consideration for acquisition								$ 11.7
Measurement period adjustments, working capital															0.4
Measurement period adjustments increase (decrease), goodwill															0.3
Measurement period adjustments, intangibles															$ 0.1
Ethos Property And Casualty Managing General Underwriters
Business Combination [Line Items]
Cash consideration for acquisition							$ 44.0
Underwriting programs for insurance carriers (in programs) \| program							8
EverSports & Entertainment Insurance, Inc
Business Combination [Line Items]
Cash consideration for acquisition						$ 43.1
Measurement period adjustment related to commissions and fees receivable – net													1.6
Innovisk Capital Partners
Business Combination [Line Items]
Cash consideration for acquisition					$ 426.8
Measurement period adjustment related to commissions and fees receivable – net													0.4
Number of managing general underwriters \| managingGeneralUnderwriter					7
Measurement period adjustment related to current accrued compensation													2.3
Business Combinations, Aggregate Business Combinations
Business Combination [Line Items]
Contingent consideration obligation, maximum											605.7		605.7
Contingently returnable consideration, maximum											$ 13.4		$ 13.4