Segment Information - Schedule of Adjusted EBITDA (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total adjusted EBITDA	$ 677,010	$ 604,004	$ 1,337,165	$ 1,183,519
Depreciation, amortization and accretion expense	(320,550)	(308,828)	(635,255)	(615,293)
Stock-based compensation expense	(61,519)	(49,725)	(110,542)	(92,261)
Impairment charges	(386)	0	(14,834)	0
Acquisition costs	(2,774)	(30,413)	(5,245)	(35,052)
Income from operations	291,781	215,038	571,289	440,913
Americas [Member]
Segment Reporting Information [Line Items]
Total adjusted EBITDA	309,052	293,955	616,890	585,504
EMEA [Member]
Segment Reporting Information [Line Items]
Total adjusted EBITDA	209,645	170,815	408,717	336,993
Asia-Pacific [Member]
Segment Reporting Information [Line Items]
Total adjusted EBITDA	$ 158,313	$ 139,234	$ 311,558	$ 261,022

Adjusted earnings before interest, taxes, depreciation and amortization/accretion.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method.

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The net result for the period of deducting operating expenses from operating revenues.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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