Balance Sheet Components - Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Leases [Abstract]
Cash paid for operating lease liabilities	$ 89,916	$ 70,917	$ 251,827	$ 187,880
Right-of-use assets obtained in exchange for new operating lease obligations	252,377	$ 175,901	485,173	$ 592,331
Operating lease right-of-use assets, net	2,249,458		2,249,458		$ 2,037,726
Current operating lease liabilities	291,128		291,128		256,222
Non-current operating lease liabilities	2,222,316		2,222,316		1,945,631
Total operating lease liabilities	$ 2,513,444		$ 2,513,444		$ 2,201,853
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other non-current assets		Other non-current assets		Other non-current assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities, Current		Accrued Liabilities, Current		Accrued Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other non-current liabilities		Other non-current liabilities		Other non-current liabilities