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Acquisitions and Divestiture - Allocation of Aggregate Purchase Price of Acquired Net Assets (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill	$ 4,292,402	$ 4,292,402		$ 4,224,906
Total cash paid		263,948	$ 116,605
2020 Consolidated Acquisition
Business Acquisition [Line Items]
Property, plant and equipment	34,700	34,700
Goodwill	80,900	80,900
Other intangible assets	125,500	125,500
Net working capital and other	22,800	22,800
Total cash paid	263,900
Accounts receivable included in purchase price	$ 18,000	$ 18,000

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Business acquisition purchase price allocation net working capital and other.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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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.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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