Leases - Significant Lease Transactions (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) option	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Finance lease right-of-use assets		$ 1,889,573		$ 1,688,032
Finance lease liability		2,134,788
Operating lease right-of-use assets		1,325,872		$ 1,475,057
Operating lease liability		$ 1,297,980
Silicon Valley 8 ("SV8") data center lease extended
Lessee, Lease, Description [Line Items]
Finance lease right-of-use assets	$ 98,141
Finance lease liability	100,043
Operating lease right-of-use assets	(13,685)
Operating lease liability	$ (15,586)
Operating and finance lease term (in years)	16 years
Operating and finance lease renewal term (in years)	10 years
Number of renewal options | option	2
Hong Kong 3 ("HK3") data center lease extended
Lessee, Lease, Description [Line Items]
Operating and finance lease term (in years)	10 years
Operating and finance lease renewal term (in years)	5 years
Hong Kong 3 ("HK3") data center lease extended | Building
Lessee, Lease, Description [Line Items]
Finance lease right-of-use assets	$ 37,987
Finance lease liability	37,987
Hong Kong 3 ("HK3") data center lease extended | Land
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	6,592
Operating lease liability	$ 6,592
Osaka 3 ("OS3") new data center and office lease
Lessee, Lease, Description [Line Items]
Finance lease right-of-use assets			$ 144,122
Finance lease liability			$ 144,122
Finance lease term (in years)			15 years
Finance lease renewal term			2 years