Leases - Narrative (Detail) $ in Thousands, ₩ in Millions, ¥ in Millions, $ in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2019 SGD ($)	Sep. 30, 2019 JPY (¥)	Sep. 30, 2019 KRW (₩)	Sep. 30, 2019 USD ($)	Aug. 31, 2019	Jul. 31, 2019	Jun. 30, 2019 HKD ($)	Jun. 30, 2019 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets				$ 1,483,491					$ 1,468,762	$ 0
Liability, operating lease				1,470,903
Lease liability, finance lease				1,367,000
Lease liability				41,800
Hong Kong 4 Data Center [Member]
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets							$ 317.3	$ 40,600
Liability, operating lease							$ 317.3	$ 40,600
Seoul 1 Data Center [Member]
Lessee, Lease, Description [Line Items]
Right-of-use asset, finance lease			₩ 35,747	29,900
Finance lease, initial term					5 years
Finance lease, renewal term					5 years
Lease liability, finance lease			₩ 34,804	29,100
Tokyo 11 Data Center [Member]
Lessee, Lease, Description [Line Items]
Right-of-use asset, finance lease		¥ 6,922.3		64,000
Lease liability, finance lease		¥ 6,922.3		64,000
Singapore 4 Data Center [Member]
Lessee, Lease, Description [Line Items]
Right-of-use asset, finance lease	$ 75.5			54,600
Operating lease right-of-use assets	48.5			35,100
Liability, operating lease	48.5			35,100
Lease liability, finance lease	$ 75.5			54,600
Silicon Valley 3 Data Center [Member]
Lessee, Lease, Description [Line Items]
Finance lease, renewal term						12 years
Liability, operating lease				13,100
Lease liability, finance lease				39,900
Operating lease, renewal term						12 years
Silicon Valley 3 Data Center, Lease Extension [Member]
Lessee, Lease, Description [Line Items]
Right-of-use asset, finance lease				39,900
Operating lease right-of-use assets				13,100
Property, plant and equipment [Member]
Lessee, Lease, Description [Line Items]
Right-of-use asset, finance lease				1,135,000
Finance lease, amortization				$ 468,700
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lease not yet commenced, remaining lease term	10 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lease not yet commenced, remaining lease term	25 years