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Amortizable Intangible Assets - Amortizable Intangible Assets (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Finite-Lived Intangible Assets [Line Items] |  |  |
Foreign currency translation, Gross carrying value |  | $ 2.3 | $ (4.5)
Gross carrying value |  | 3,053.0 | 2,992.5
Foreign currency translation, Accumulated amortization |  | 0.1 | 0.4
Accumulated amortization |  | (1,521.3) | (1,397.3)
Foreign currency translation, Net carrying value |  | 2.4 | (4.1)
Net carrying value |  | 1,531.7 | 1,595.2
Purchased Customer Accounts and Other |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying value, excluding foreign currency translation |  | 3,010.4 | 2,957.7
Accumulated amortization, excluding foreign currency translation |  | (1,486.0) | (1,363.7)
Net carrying value, excluding foreign currency translation |  | $ 1,524.4 | $ 1,594.0
Weighted average life (years) | [1] | 14 years 9 months 18 days | 14 years 9 months 18 days
Non-compete Agreements |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying value, excluding foreign currency translation |  | $ 40.3 | $ 39.3
Accumulated amortization, excluding foreign currency translation |  | (35.4) | (34.0)
Net carrying value, excluding foreign currency translation |  | $ 4.9 | $ 5.3
Weighted average life (years) | [1] | 4 years 4 months 24 days | 4 years 4 months 24 days
[1] | Weighted average life calculated as of the date of acquisition.

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