Other Financial Statement Details - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, gross	$ 6,416	$ 5,907
Accumulated depreciation	(4,723)	(4,183)
Total property and equipment, net	1,693	1,724
Total long-lived assets	2,172
Depreciation	701	627	$ 649
Net change in property and equipment included in accounts payable (2017 - not material)	42	10
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net		1,566
Total long-lived assets	1,862
Other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net		158
Total long-lived assets	310
Computer equipment and software
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, gross	2,804	2,664
Internal use software and website development costs
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, gross	2,471	2,149
Land and buildings
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, gross	430	408
Leasehold improvements
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, gross	460	420
Furniture and fixtures
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, gross	171	147
Development in progress and other
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, gross	$ 80	$ 119