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Goodwill - Summary of Goodwill (Detail) $ in Millions | 6 Months Ended
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Jun. 30, 2020 USD ($)
Goodwill [Line Items] |
Gross cost, beginning balance | $ 599.5
Accumulated impairment losses, beginning balance | (236.5)
Net book amount, beginning balance | 363.0
Exchange effect | 0.3
Exchange effect | 0.0
Gross cost, ending balance | 599.8
Accumulated impairment losses, ending balance | (236.5)
Net book amount, ending balance | $ 363.3

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- Definition Goodwill foreign currency translation gain loss accumulated impairment. + References No definition available. + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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