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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Oct. 01, 2020 | Oct. 31, 2021 | Jun. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2019
Goodwill |  |  |  |  |
Goodwill impairment |  |  |  | $ 0.0 |
Impairment of infinite lived intangible assets |  |  |  | 0.0 |
Trade names |  |  |  |  |
Goodwill |  |  |  |  |
Impairment of infinite lived intangible assets |  |  |  | 0.0 |
BCG |  |  |  |  |
Goodwill |  |  |  |  |
Goodwill impairment | $ 5.6 | $ 5.6 |  |  |
Acquired finite-lived intangible assets |  |  |  |  | $ 14.1
Impairment of finite lived intangible assets | 3.6 |  |  |  |
BCG | Trade names |  |  |  |  |
Goodwill |  |  |  |  |
Impairment of infinite lived intangible assets | $ 0.8 |  |  |  |
NTA |  |  |  |  |
Goodwill |  |  |  |  |
Acquired finite-lived intangible assets |  |  |  |  | $ 160.4
Retirement |  |  |  |  |
Goodwill |  |  |  |  |
Goodwill impairment |  |  | $ 28.0 | $ 0.0 |

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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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