Balance Sheet Components - Property, Plant and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 15,996,650	$ 13,738,839
Less accumulated depreciation	(4,970,630)	(4,344,237)
Property, plant and equipment, net	11,026,020	9,394,602
Core systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,073,912	6,334,702
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,822,501	3,906,686
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,637,133	1,850,351
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	974,152	425,428
Personal property
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	857,585	798,133
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 631,367	$ 423,539