Segment Information - Schedule of Adjusted EBITDA (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Total adjusted EBITDA	$ 660,155	$ 579,515
Depreciation, amortization and accretion expense	(314,705)	(306,465)
Stock-based compensation expense	(49,023)	(42,536)
Impairment charges	(14,448)	0
Acquisition costs	(2,471)	(4,639)
Income from operations	279,508	225,875
Americas [Member]
Segment Reporting Information [Line Items]
Total adjusted EBITDA	307,838	291,549
EMEA [Member]
Segment Reporting Information [Line Items]
Total adjusted EBITDA	199,072	166,178
Asia-Pacific [Member]
Segment Reporting Information [Line Items]
Total adjusted EBITDA	$ 153,245	$ 121,788

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

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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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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