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Income Taxes - Changes Occurred in Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |  |
Beginning balance of unrecognized tax benefits | $ 54.1 | $ 52.7 | $ 48.9
Additions for current year tax positions | 8.8 | 9.2 | 9.7
Additions for prior year tax positions | 2.2 | 5.1 | 1.3
Reductions for prior year tax positions | (3.7) | (2.3) | (0.6)
Reductions for audit settlements | (1.8) | (5.2) | (4.7)
Reductions for the expiration of statutes of limitations | (6.2) | (4.1) | (2.1)
Changes due to foreign currency translation adjustments | (3.7) | (1.3) | 0.2
Ending balance of unrecognized tax benefits (excluding interest and penalties) | 49.7 | 54.1 | 52.7
Interest and penalties associated with unrecognized tax benefits | 22.8 | 18.4 | 13.2
Ending balance of unrecognized tax benefits (including interest and penalties) | $ 72.5 | $ 72.5 | $ 65.9

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI https://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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