Segment Information - Revenue Information on Services Basis (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue from External Customer [Line Items]
Revenue	$ 1,384,977	$ 1,261,943	$ 2,748,195	$ 2,477,820
Recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	1,306,045	1,187,749	2,580,873	2,338,378
Recurring Revenues [Member] | Colocation [Member]
Revenue from External Customer [Line Items]
Revenue	1,005,615	913,585	1,986,386	1,794,969
Recurring Revenues [Member] | Interconnection [Member]
Revenue from External Customer [Line Items]
Revenue	219,031	197,613	431,815	392,612
Recurring Revenues [Member] | Managed infrastructure services [Member]
Revenue from External Customer [Line Items]
Revenue	73,772	69,207	146,567	140,608
Recurring Revenues [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenue	7,627	7,344	16,105	10,189
Non-recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	78,932	74,194	167,322	139,442
Americas [Member]
Revenue from External Customer [Line Items]
Revenue	644,420	618,275	1,288,786	1,220,902
Americas [Member] | Recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	614,806	588,887	1,221,116	1,164,879
Americas [Member] | Recurring Revenues [Member] | Colocation [Member]
Revenue from External Customer [Line Items]
Revenue	444,086	433,895	884,067	861,020
Americas [Member] | Recurring Revenues [Member] | Interconnection [Member]
Revenue from External Customer [Line Items]
Revenue	142,460	131,720	281,023	260,973
Americas [Member] | Recurring Revenues [Member] | Managed infrastructure services [Member]
Revenue from External Customer [Line Items]
Revenue	22,908	18,292	44,695	36,827
Americas [Member] | Recurring Revenues [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenue	5,352	4,980	11,331	6,059
Americas [Member] | Non-recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	29,614	29,388	67,670	56,023
EMEA [Member]
Revenue from External Customer [Line Items]
Revenue	449,855	383,168	884,515	762,798
EMEA [Member] | Recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	417,081	359,582	817,318	715,072
EMEA [Member] | Recurring Revenues [Member] | Colocation [Member]
Revenue from External Customer [Line Items]
Revenue	347,795	293,518	678,920	581,579
EMEA [Member] | Recurring Revenues [Member] | Interconnection [Member]
Revenue from External Customer [Line Items]
Revenue	38,614	33,969	76,139	68,946
EMEA [Member] | Recurring Revenues [Member] | Managed infrastructure services [Member]
Revenue from External Customer [Line Items]
Revenue	28,397	29,731	57,485	60,417
EMEA [Member] | Recurring Revenues [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenue	2,275	2,364	4,774	4,130
EMEA [Member] | Non-recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	32,774	23,586	67,197	47,726
Asia-Pacific [Member]
Revenue from External Customer [Line Items]
Revenue	290,702	260,500	574,894	494,120
Asia-Pacific [Member] | Recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	274,158	239,280	542,439	458,427
Asia-Pacific [Member] | Recurring Revenues [Member] | Colocation [Member]
Revenue from External Customer [Line Items]
Revenue	213,734	186,172	423,399	352,370
Asia-Pacific [Member] | Recurring Revenues [Member] | Interconnection [Member]
Revenue from External Customer [Line Items]
Revenue	37,957	31,924	74,653	62,693
Asia-Pacific [Member] | Recurring Revenues [Member] | Managed infrastructure services [Member]
Revenue from External Customer [Line Items]
Revenue	22,467	21,184	44,387	43,364
Asia-Pacific [Member] | Recurring Revenues [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenue	0	0	0	0
Asia-Pacific [Member] | Non-recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	$ 16,544	$ 21,220	$ 32,455	$ 35,693