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Goodwill and Other Intangible Assets - Intangible Assets by Asset Type (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 4,354.9 | $ 4,305.0
Accumulated Amortization | (2,998.3) | (2,935.3)
Net Carrying Amount | 1,356.6 | 1,369.7
Customer relationships |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 3,478.1 | 3,379.7
Accumulated Amortization | (2,361.6) | (2,236.6)
Net Carrying Amount | 1,116.5 | $ 1,143.1
Trade name |  |
Intangible Assets [Line Items] |  |
Useful Lives (Years) |  | 20 years
Gross Carrying Amount | 449.6 | $ 446.1
Accumulated Amortization | (387.6) | (366.6)
Net Carrying Amount | 62.0 | 79.5
Internally developed software |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 391.6 | 474.9
Accumulated Amortization | (246.9) | (330.6)
Net Carrying Amount | 144.7 | 144.3
Other |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 35.6 | 4.3
Accumulated Amortization | (2.2) | (1.5)
Net Carrying Amount | $ 33.4 | $ 2.8
Minimum | Customer relationships |  |
Intangible Assets [Line Items] |  |
Useful Lives (Years) | 3 years | 3 years
Minimum | Trade name |  |
Intangible Assets [Line Items] |  |
Useful Lives (Years) | 1 year | 1 year
Minimum | Internally developed software |  |
Intangible Assets [Line Items] |  |
Useful Lives (Years) | 3 years | 3 years
Minimum | Other |  |
Intangible Assets [Line Items] |  |
Useful Lives (Years) | 1 year | 1 year
Maximum | Customer relationships |  |
Intangible Assets [Line Items] |  |
Useful Lives (Years) | 14 years | 14 years
Maximum | Trade name |  |
Intangible Assets [Line Items] |  |
Useful Lives (Years) | 20 years |
Maximum | Internally developed software |  |
Intangible Assets [Line Items] |  |
Useful Lives (Years) | 5 years | 5 years
Maximum | Other |  |
Intangible Assets [Line Items] |  |
Useful Lives (Years) | 10 years | 10 years

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