Segment Information - Revenue Information on Services Basis (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from External Customer [Line Items]
Revenues	$ 1,519,767	$ 1,396,810	$ 4,434,430	$ 4,145,005
Recurring Revenues
Revenue from External Customer [Line Items]
Revenues	1,432,072	1,319,336	4,191,904	3,900,209
Colocation
Revenue from External Customer [Line Items]
Revenues	1,078,565	1,013,101	3,170,387	2,999,487
Interconnection
Revenue from External Customer [Line Items]
Revenues	260,942	226,770	752,514	658,585
Managed infrastructure services
Revenue from External Customer [Line Items]
Revenues	82,258	74,286	239,799	220,853
Service, Other
Revenue from External Customer [Line Items]
Revenues	10,307	5,179	29,204	21,284
Non-Recurring Revenues
Revenue from External Customer [Line Items]
Revenues	87,695	77,474	242,526	244,796
Americas
Revenue from External Customer [Line Items]
Revenues	672,332	645,275	1,995,656	1,934,061
Americas | Recurring Revenues
Revenue from External Customer [Line Items]
Revenues	639,572	615,282	1,907,059	1,836,398
Americas | Colocation
Revenue from External Customer [Line Items]
Revenues	450,030	441,596	1,348,482	1,325,663
Americas | Interconnection
Revenue from External Customer [Line Items]
Revenues	156,677	146,212	460,993	427,235
Americas | Managed infrastructure services
Revenue from External Customer [Line Items]
Revenues	28,954	24,082	83,372	68,777
Americas | Service, Other
Revenue from External Customer [Line Items]
Revenues	3,911	3,392	14,212	14,723
Americas | Non-Recurring Revenues
Revenue from External Customer [Line Items]
Revenues	32,760	29,993	88,597	97,663
EMEA
Revenue from External Customer [Line Items]
Revenues	518,083	458,140	1,485,082	1,342,655
EMEA | Recurring Revenues
Revenue from External Customer [Line Items]
Revenues	483,744	427,702	1,394,408	1,245,020
EMEA | Colocation
Revenue from External Customer [Line Items]
Revenues	391,773	357,201	1,135,247	1,036,121
EMEA | Interconnection
Revenue from External Customer [Line Items]
Revenues	55,700	41,063	155,145	117,202
EMEA | Managed infrastructure services
Revenue from External Customer [Line Items]
Revenues	30,690	27,651	89,839	85,136
EMEA | Service, Other
Revenue from External Customer [Line Items]
Revenues	5,581	1,787	14,177	6,561
EMEA | Non-Recurring Revenues
Revenue from External Customer [Line Items]
Revenues	34,339	30,438	90,674	97,635
Asia-Pacific
Revenue from External Customer [Line Items]
Revenues	329,352	293,395	953,692	868,289
Asia-Pacific | Recurring Revenues
Revenue from External Customer [Line Items]
Revenues	308,756	276,352	890,437	818,791
Asia-Pacific | Colocation
Revenue from External Customer [Line Items]
Revenues	236,762	214,304	686,658	637,703
Asia-Pacific | Interconnection
Revenue from External Customer [Line Items]
Revenues	48,565	39,495	136,376	114,148
Asia-Pacific | Managed infrastructure services
Revenue from External Customer [Line Items]
Revenues	22,614	22,553	66,588	66,940
Asia-Pacific | Service, Other
Revenue from External Customer [Line Items]
Revenues	815	0	815	0
Asia-Pacific | Non-Recurring Revenues
Revenue from External Customer [Line Items]
Revenues	$ 20,596	$ 17,043	$ 63,255	$ 49,498