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Acquisitions - Schedule of Purchase Price Allocation (Details) € in Thousands, $ in Thousands					1 Months Ended	12 Months Ended
	May 25, 2018 USD ($)	May 25, 2018 EUR (€)	Jan. 10, 2018 USD ($)	May 02, 2016 USD ($)	Nov. 30, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Consideration paid for acquisitions
Accrued Purchase Price and Other Holdbacks (see Note 6)						$ 35,218	$ 20,093	$ 0
Fair Value of Identifiable Assets Acquired:
Goodwill Initially Recorded						4,441,030	4,070,267
Net cash paid and received for previous acquisitions						(23,967)	(137)	182
Recall Holdings Limited
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)				$ 331,800				331,834
Accrued Purchase Price and Other Holdbacks (see Note 6)								0
Fair Value of Common Stock Issued								1,835,026
Fair Value of Noncontrolling Interests								0
Total Consideration				$ 2,166,900				2,166,860
Fair Value of Identifiable Assets Acquired:
Cash								76,461
Accounts Receivable and Prepaid Expenses								176,775
Fair Value of Recall Divestments								121,689
Other Assets								57,563
Property, Plant and Equipment								622,063
Customer Relationship Intangible Assets								709,139
Data Center In-Place Leases								0
Data Center Tenant Relationships								0
Data Center Above-Market Leases								0
Other Intangible Assets								0
Debt Assumed								(792,385)
Accounts Payable, Accrued Expenses and Other Liabilities								(276,814)
Deferred Income Taxes								(164,074)
Data Center Below-Market Leases								0
Total Fair Value of Identifiable Net Assets Acquired								530,417
Goodwill Initially Recorded								1,636,443
Other Acquisitions
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)						432,078	234,314	37,350
Accrued Purchase Price and Other Holdbacks (see Note 6)						35,218	20,093	0
Fair Value of Common Stock Issued						0	83,014	0
Fair Value of Noncontrolling Interests						0	1,507	3,506
Total Consideration						467,296	338,928	40,856
Fair Value of Identifiable Assets Acquired:
Cash						10,227	14,746	576
Accounts Receivable and Prepaid Expenses						13,076	19,309	2,703
Fair Value of Recall Divestments						0	0	0
Other Assets						4,586	5,070	541
Property, Plant and Equipment						225,848	150,878	10,963
Customer Relationship Intangible Assets						44,622	116,028	20,842
Data Center In-Place Leases						36,130	6,300	0
Data Center Tenant Relationships						18,410	0	0
Data Center Above-Market Leases						2,381	0	0
Other Intangible Assets						0	14,487	0
Debt Assumed						(12,312)	(5,287)	0
Accounts Payable, Accrued Expenses and Other Liabilities						(17,206)	(24,869)	(11,504)
Deferred Income Taxes						(43,218)	(18,122)	(2,985)
Data Center Below-Market Leases						(694)	0	0
Total Fair Value of Identifiable Net Assets Acquired						281,850	278,540	21,136
Goodwill Initially Recorded						185,446	60,388	19,720
Cash acquired from acquisition						44,534	14,746	77,037
Series of Individually Immaterial Business Acquisitions and Recall Holdings Limited
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)								369,184
Accrued Purchase Price and Other Holdbacks (see Note 6)								0
Fair Value of Common Stock Issued								1,835,026
Fair Value of Noncontrolling Interests								3,506
Total Consideration								2,207,716
Fair Value of Identifiable Assets Acquired:
Cash								77,037
Accounts Receivable and Prepaid Expenses								179,478
Fair Value of Recall Divestments								121,689
Other Assets								58,104
Property, Plant and Equipment								633,026
Customer Relationship Intangible Assets								729,981
Data Center In-Place Leases								0
Data Center Tenant Relationships								0
Data Center Above-Market Leases								0
Other Intangible Assets								0
Debt Assumed								(792,385)
Accounts Payable, Accrued Expenses and Other Liabilities								(288,318)
Deferred Income Taxes								(167,059)
Data Center Below-Market Leases								0
Total Fair Value of Identifiable Net Assets Acquired								551,553
Goodwill Initially Recorded								$ 1,656,163
IO Data Center LLC
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)						1,347,046
Accrued Purchase Price and Other Holdbacks (see Note 6)						0
Fair Value of Common Stock Issued						0
Fair Value of Noncontrolling Interests						0
Total Consideration			$ 1,347,000			1,347,046
Fair Value of Identifiable Assets Acquired:
Cash						34,307
Accounts Receivable and Prepaid Expenses						7,070
Fair Value of Recall Divestments						0
Other Assets						0
Property, Plant and Equipment						863,027
Customer Relationship Intangible Assets						0
Data Center In-Place Leases						104,340
Data Center Tenant Relationships						77,362
Data Center Above-Market Leases						16,439
Other Intangible Assets						0
Debt Assumed						0
Accounts Payable, Accrued Expenses and Other Liabilities						(36,230)
Deferred Income Taxes						0
Data Center Below-Market Leases						(11,421)
Total Fair Value of Identifiable Net Assets Acquired						1,054,894
Goodwill Initially Recorded						292,152
Series of Individually Immaterial Business Acquisitions and IODC
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)						1,779,124
Accrued Purchase Price and Other Holdbacks (see Note 6)						35,218
Fair Value of Common Stock Issued						0
Fair Value of Noncontrolling Interests						0
Total Consideration						1,814,342
Fair Value of Identifiable Assets Acquired:
Cash						44,534
Accounts Receivable and Prepaid Expenses						20,146
Fair Value of Recall Divestments						0
Other Assets						4,586
Property, Plant and Equipment						1,088,875
Customer Relationship Intangible Assets						44,622
Data Center In-Place Leases						140,470
Data Center Tenant Relationships						95,772
Data Center Above-Market Leases						18,820
Other Intangible Assets						0
Debt Assumed						(12,312)
Accounts Payable, Accrued Expenses and Other Liabilities						(53,436)
Deferred Income Taxes						(43,218)
Data Center Below-Market Leases						(12,115)
Total Fair Value of Identifiable Net Assets Acquired						1,336,744
Goodwill Initially Recorded						477,598
EvoSwitch
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)	$ 222,000	€ 189,000
Accrued Purchase Price and Other Holdbacks (see Note 6)						$ 18,824
Santa Fe China Transaction
Consideration paid for acquisitions
Accrued Purchase Price and Other Holdbacks (see Note 6)							$ 16,771
Total Consideration					$ 16,800
Customer relationship intangible assets
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life						10 years	12 years	13 years
Data center in-place leases
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life						6 years
Data center tenant relationships
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life						9 years
Data center above-market leases
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life						3 years
Data center below-market leases
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life						7 years

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