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Goodwill and Identifiable Assets Acquired Intangible Assets (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Intangible assets subject to amortization: |  |
Gross Carrying Amount | $ 525.3 | $ 674.6
Accumulated Amortization | 300.2 | 377.8
Net Carrying Amount | 225.1 | 296.8
Intangible assets not subject to amortization: |  |
Trademarks, Carrying Amount | 272.8 | 272.8
Gross Carrying Amount | 798.1 | 947.4
Net Carrying Amount | 497.9 | 569.6
Contractual customer relationships |  |
Intangible assets subject to amortization: |  |
Gross Carrying Amount | 496.0 | 589.3
Accumulated Amortization | 282.0 | 315.7
Net Carrying Amount | $ 214.0 | 273.6
Contractual customer relationships | Minimum [Member] |  |
Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 7 years |
Contractual customer relationships | Maximum [Member] |  |
Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 13 years |
Backlog |  |
Intangible assets subject to amortization: |  |
Gross Carrying Amount | $ 0.0 | 44.1
Accumulated Amortization | 0.0 | 36.5
Net Carrying Amount | $ 0.0 | 7.6
Backlog | Minimum [Member] |  |
Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 1 year |
Backlog | Maximum [Member] |  |
Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 3 years |
Non-compete agreements |  |
Intangible assets subject to amortization: |  |
Gross Carrying Amount | $ 29.3 | 41.2
Accumulated Amortization | 18.2 | 25.6
Net Carrying Amount | $ 11.1 | $ 15.6
Non-compete agreements | Minimum [Member] |  |
Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 2 years |
Non-compete agreements | Maximum [Member] |  |
Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 7 years |

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