Depreciation and Amortization - Schedule of Estimated Amortization Expense (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2025 (remaining nine months)	$ 191.9
2026	200.0
2027	121.9
2028	81.0
2029	66.9
Thereafter	308.4
Total	970.1
Amortization of Acquired Intangible Assets
2025 (remaining nine months)	134.5
2026	139.9
2027	83.2
2028	71.4
2029	66.9
Thereafter	307.6
Total	803.5
Residual Commission Buyouts
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2025 (remaining nine months)	66.4
2026	54.9
2027	6.4
2028	4.8
2029	1.5
Thereafter	1.9
Total	135.9	$ 157.2
Other Intangible Assets
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2025 (remaining nine months)	104.7
2026	122.6
2027	99.4
2028	69.0
2029	65.1
Thereafter	306.5
Total	767.3	758.4
Capitalized Customer Acquisition Costs
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2025 (remaining nine months)	20.8
2026	22.5
2027	16.1
2028	7.2
2029	0.3
Thereafter	0.0
Total	$ 66.9	$ 65.3

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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