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Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets (subject to amortization) | $ 2,863,847 | $ 2,847,520
Accumulated amortization | (993,111) | (826,519)
Net intangible assets subject to amortization | 1,870,736 | 2,021,001
Total | 2,623,719 | 2,762,872
Trademarks and trade names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets (not subject to amortization) | 752,983 | 741,871
Patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets (subject to amortization) | 49,396 | 47,872
Accumulated amortization | (37,858) | (36,697)
Purchased technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets (subject to amortization) | 487,517 | 517,464
Accumulated amortization | (209,308) | (164,231)
Customer lists |  |
Finite-Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets (subject to amortization) | 2,326,934 | 2,282,184
Accumulated amortization | $ (745,945) | $ (625,591)

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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