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Investments and Fair Value Measurement - Summary of Amortized Cost, Unrealized Gains and Losses of Financial Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 0	$ 2,281
Allowance for Credit Loss		0	$ 0
Recurring
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		3,756
Unrealized Gains		61
Unrealized Losses		0
Allowance for Credit Loss		0
Fair Value		3,817
Recurring \| Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		611
Unrealized Gains		0
Unrealized Losses		0
Allowance for Credit Loss		0
Fair Value	0	611
Recurring \| U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		542
Unrealized Gains		0
Unrealized Losses		0
Allowance for Credit Loss		0
Fair Value	0	542
Recurring \| Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		322
Unrealized Gains		1
Unrealized Losses		0
Allowance for Credit Loss		0
Fair Value	0	323
Recurring \| Non-marketable debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		2,281
Unrealized Gains		60
Unrealized Losses		0
Allowance for Credit Loss		0
Fair Value	$ 0	$ 2,341