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Goodwill and Identifiable Intangible Assets - Summary of Gross Carrying Value and Accumulated Amortization By Class of Identifiable Intangible Assets (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
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Amortizable intangible assets: |  |  |
Amortizable intangible assets, Gross Carrying Amounts |  | $ 943.0 | $ 817.1
Amortizable intangible assets, Accumulated Amortization |  | (360.4) | (336.2)
Amortizable intangible assets, Net Book Value |  | 582.6 | 480.9
Total identifiable intangibles |  |  |
Total identifiable intangible assets, Gross Carrying Amounts |  | 1,238.1 | 1,227.7
Total identifiable intangibles, Accumulated Amortization |  | (404.9) | (380.7)
Total identifiable intangibles, Net Book Value |  | 833.2 | 847.0
Trade Names |  |  |
Amortizable intangible assets: |  |  |
Amortizable intangible assets, Gross Carrying Amounts |  | 493.2 | 369.7
Amortizable intangible assets, Accumulated Amortization |  | (132.6) | (123.0)
Amortizable intangible assets, Net Book Value |  | 360.6 | 246.7
Customer and contractual relationships |  |  |
Amortizable intangible assets: |  |  |
Amortizable intangible assets, Gross Carrying Amounts |  | 359.3 | 356.9
Amortizable intangible assets, Accumulated Amortization |  | (209.4) | (198.2)
Amortizable intangible assets, Net Book Value |  | 149.9 | 158.7
Vendor Relationships |  |  |
Amortizable intangible assets: |  |  |
Amortizable intangible assets, Gross Carrying Amounts |  | 82.4 | 82.4
Amortizable intangible assets, Accumulated Amortization |  | (14.0) | (11.2)
Amortizable intangible assets, Net Book Value |  | 68.4 | 71.2
Patents |  |  |
Amortizable intangible assets: |  |  |
Amortizable intangible assets, Gross Carrying Amounts |  | 8.1 | 8.1
Amortizable intangible assets, Accumulated Amortization |  | (4.4) | (3.8)
Amortizable intangible assets, Net Book Value |  | 3.7 | 4.3
Trade Names |  |  |
Indefinite-lived intangible assets: |  |  |
Indefinite-lived intangible assets, Gross Carrying Amount | [1] | 295.1 | 410.6
Indefinite-lived intangible asset, Accumulated Amortization | [1] | (44.5) | (44.5)
Indefinite-lived intangible assets, Net Book Value | [1] | $ 250.6 | $ 366.1
[1] | Accumulated amortization prior to the adoption of authoritative guidance on goodwill and other intangible assets, at which time further amortization ceased.

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