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Goodwill and Intangible Assets - Schedule of Long Lived Assets by Country (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Long Lived Assets Geographic [Line Items] |  |
Total long-lived assets | $ 2,391.1 | $ 2,311.7
United States [Member] |  |
Long Lived Assets Geographic [Line Items] |  |
Total long-lived assets | 1,796.9 | 1,800.5
Canada [Member] |  |
Long Lived Assets Geographic [Line Items] |  |
Total long-lived assets | 488.6 | 481.2
Other [Member] |  |
Long Lived Assets Geographic [Line Items] |  |
Total long-lived assets | $ 105.6 | $ 30.0

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 + Details
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