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Goodwill and Other Intangible Assets - Intangible Assets and Amortization Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Finite-Lived Intangible Assets |  |  |  |  |
Gross carrying amount | $ 203.5 |  | $ 203.5 |  | $ 204.0
Accumulated amortization | 58.2 |  | 58.2 |  | 46.6
Intangible assets, net | 177.3 |  | 177.3 |  | 189.4
Amortization expense | 5.7 | $ 2.9 | 11.6 | $ 5.8 |
2023 | 11.4 |  | 11.4 |  |
2024 | 22.4 |  | 22.4 |  |
2025 | 16.5 |  | 16.5 |  |
2026 | 16.5 |  | 16.5 |  |
2027 | 15.8 |  | 15.8 |  |
Finite-Lived Intangible Asset, Expected Amortization, after Year Five | 62.7 |  | 62.7 |  |
Finite-Lived Intangible Assets, Net | 145.3 |  | 145.3 |  |
Proceeds from Sale of Other Assets |  |  | 7.2 | $ 0.0 |
Payments for Commissions |  |  | 1.8 |  |
Asset at Fair Value, Changes in Fair Value Resulting from Changes in Assumptions |  |  | 0.5 |  |
Trademarks |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |
Unamortized intangible assets, gross carrying amount | 32.0 |  | 32.0 |  | 32.0
Trademarks |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |
Gross carrying amount | 16.0 |  | 16.0 |  | 16.0
Accumulated amortization | 1.8 |  | 1.8 |  | 1.2
Customer relationships |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |
Gross carrying amount | 120.6 |  | 120.6 |  | 121.1
Accumulated amortization | 22.5 |  | 22.5 |  | 16.0
Unpatented Technology [Member] |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |
Gross carrying amount | 64.5 |  | 64.5 |  | 64.5
Accumulated amortization | 31.9 |  | 31.9 |  | 27.4
Other |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |
Gross carrying amount | 2.4 |  | 2.4 |  | 2.4
Accumulated amortization | $ 2.0 |  | $ 2.0 |  | $ 2.0

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482686/350-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- Definition Amount of increase (decrease) in fair value from changes in the assumptions or model used to calculate the fair value of a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- Definition Amount of amortization for asset, excluding financial asset and goodwill, lacking physical substance with finite life expected to be recognized after fifth 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). + References No definition available. + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 928 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483147/928-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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