Segment Information - Revenue Information by Category (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from External Customer [Line Items]
Revenues	$ 1,564,115	$ 1,519,767	$ 1,470,121	$ 1,444,542	$ 1,417,135	$ 1,396,810	$ 1,384,977	$ 1,363,218	$ 5,998,545	$ 5,562,140	$ 5,071,654
Operating segments \| Recurring revenues
Revenue from External Customer [Line Items]
Revenues									5,658,030	5,238,186	4,776,502
Operating segments \| Colocation
Revenue from External Customer [Line Items]
Revenues									4,259,001	4,022,207	3,670,171
Operating segments \| Interconnection
Revenue from External Customer [Line Items]
Revenues									1,023,258	893,589	801,965
Operating segments \| Managed infrastructure
Revenue from External Customer [Line Items]
Revenues									337,345	292,628	279,632
Operating segments \| Other
Revenue from External Customer [Line Items]
Revenues									38,426	29,762	24,734
Operating segments \| Non-recurring revenues
Revenue from External Customer [Line Items]
Revenues									340,515	323,954	295,152
Americas
Revenue from External Customer [Line Items]
Revenues									2,707,758	2,587,727	2,484,734
Americas \| U.S.
Revenue from External Customer [Line Items]
Revenues									2,500,000	2,400,000	2,300,000
Americas \| Operating segments \| Recurring revenues
Revenue from External Customer [Line Items]
Revenues									2,582,800	2,456,368	2,357,326
Americas \| Operating segments \| Colocation
Revenue from External Customer [Line Items]
Revenues									1,820,709	1,769,654	1,732,998
Americas \| Operating segments \| Interconnection
Revenue from External Customer [Line Items]
Revenues									622,327	576,709	532,163
Americas \| Operating segments \| Managed infrastructure
Revenue from External Customer [Line Items]
Revenues									120,159	90,262	75,595
Americas \| Operating segments \| Other
Revenue from External Customer [Line Items]
Revenues									19,605	19,743	16,570
Americas \| Operating segments \| Non-recurring revenues
Revenue from External Customer [Line Items]
Revenues									124,958	131,359	127,408
EMEA
Revenue from External Customer [Line Items]
Revenues									1,996,389	1,806,444	1,562,637
EMEA \| Operating segments \| Recurring revenues
Revenue from External Customer [Line Items]
Revenues									1,864,720	1,680,746	1,467,492
EMEA \| Operating segments \| Colocation
Revenue from External Customer [Line Items]
Revenues									1,504,770	1,395,544	1,201,769
EMEA \| Operating segments \| Interconnection
Revenue from External Customer [Line Items]
Revenues									213,490	161,552	138,874
EMEA \| Operating segments \| Managed infrastructure
Revenue from External Customer [Line Items]
Revenues									127,722	113,631	118,685
EMEA \| Operating segments \| Other
Revenue from External Customer [Line Items]
Revenues									18,738	10,019	8,164
EMEA \| Operating segments \| Non-recurring revenues
Revenue from External Customer [Line Items]
Revenues									131,669	125,698	95,145
Asia-Pacific
Revenue from External Customer [Line Items]
Revenues									1,294,398	1,167,969	1,024,283
Asia-Pacific \| Operating segments \| Recurring revenues
Revenue from External Customer [Line Items]
Revenues									1,210,510	1,101,072	951,684
Asia-Pacific \| Operating segments \| Colocation
Revenue from External Customer [Line Items]
Revenues									933,522	857,009	735,404
Asia-Pacific \| Operating segments \| Interconnection
Revenue from External Customer [Line Items]
Revenues									187,441	155,328	130,928
Asia-Pacific \| Operating segments \| Managed infrastructure
Revenue from External Customer [Line Items]
Revenues									89,464	88,735	85,352
Asia-Pacific \| Operating segments \| Other
Revenue from External Customer [Line Items]
Revenues									83	0	0
Asia-Pacific \| Operating segments \| Non-recurring revenues
Revenue from External Customer [Line Items]
Revenues									$ 83,888	$ 66,897	$ 72,599