Balance Sheet Components - Net Book Value of Intangible Assets by Geographic Regions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, net beginning balance	$ 719,231	$ 224,565	$ 147,527
Asset held for sale adjustments		(2,460)	(784)
Write-off of intangible asset	(725)	(573)	(357)
Amortization of intangibles	(177,008)	(122,862)	(27,446)
Impact of foreign currency exchange	36,929	(85,440)	(6,838)
Intangible assets, net ending balance	2,384,972	719,231	224,565
Nimbo Technologies Inc.
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period			1,089
Bit-isle
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period			111,374
Telecity Group plc
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period		694,243
Digital Realty
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period		11,758
Verizon
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period	1,693,900
Itconic, Zenium and IO
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period	112,645
Reportable geographical components | Americas
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, net beginning balance	40,117	50,643	62,954
Write-off of intangible asset		(573)
Amortization of intangibles	(84,749)	(11,348)	(11,432)
Impact of foreign currency exchange	(2,895)	1,395	(1,968)
Intangible assets, net ending balance	1,646,373	40,117	50,643
Reportable geographical components | Americas | Nimbo Technologies Inc.
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period			1,089
Reportable geographical components | Americas | Verizon
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period	1,693,900
Reportable geographical components | EMEA
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, net beginning balance	562,361	44,355	62,185
Asset held for sale adjustments			(784)
Write-off of intangible asset	(725)		(357)
Amortization of intangibles	(79,105)	(97,715)	(11,675)
Impact of foreign currency exchange	36,043	(90,280)	(5,014)
Intangible assets, net ending balance	631,219	562,361	44,355
Reportable geographical components | EMEA | Telecity Group plc
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period		694,243
Reportable geographical components | EMEA | Digital Realty
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period		11,758
Reportable geographical components | EMEA | Itconic, Zenium and IO
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period	112,645
Reportable geographical components | Asia-Pacific
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, net beginning balance	116,753	129,567	22,388
Asset held for sale adjustments		(2,460)
Amortization of intangibles	(13,154)	(13,799)	(4,339)
Impact of foreign currency exchange	3,781	3,445	144
Intangible assets, net ending balance	$ 107,380	$ 116,753	129,567
Reportable geographical components | Asia-Pacific | Bit-isle
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period			$ 111,374