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Goodwill and Other Intangible Assets - Changes in Carrying Amount of Definite-Lived Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying value |  | $ 159.4 | $ 151.5
Accumulated amortization |  | (55.4) | (42.7)
Net carrying value |  | 104.0 | 108.8
Total intangible assets (excluding goodwill), gross carrying value |  | 263.6 | 248.4
Total intangible assets (excluding goodwill), net |  | $ 208.2 | 205.7
Definite-lived intangible asset, useful life |  | 12 years |
Estimated amortization of intangibles, year one |  | $ 13.7 |
Estimated amortization of intangibles, year two |  | 13.7 |
Estimated amortization of intangibles, year three |  | 13.7 |
Estimated amortization of intangibles, year four |  | 13.6 |
Estimated amortization of intangibles, year five |  | 12.7 |
Estimated amortization of intangibles, thereafter |  | 36.6 |
Customer Relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying value | [1] | 153.7 | 146.2
Accumulated amortization | [1] | (52.0) | (39.8)
Net carrying value | [1] | $ 101.7 | 106.4
Customer Relationships | TBEI |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Definite-lived intangible asset, useful life |  | 12 years |
Other Intangible Assets |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying value | [1] | $ 5.7 | 5.3
Accumulated amortization | [1] | (3.4) | (2.9)
Net carrying value | [1] | $ 2.3 | $ 2.4
Definite-lived intangible asset, useful life |  | 7 years |
[1] | Average useful life of customer relationships and other definite-lived intangible assets are estimated to be approximately 12 years and 7 years, respectively. The average useful life across all definite-lived intangible assets is estimated to be approximately 12 years.

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