Fair Value Measurement of Assets and Liabilities - Quantitative Information About Level 3 Significant Inputs (Details) - Significant Unobservable Inputs (Level 3) - Fair Value, Measurements, Recurring $ in Millions	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Probability of vesting | Minimum
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Warrant, measurement input	0.000
Probability of vesting | Maximum
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Warrant, measurement input	0.550
Probability of vesting | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Warrant, measurement input	0.500
Equity volatility
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Warrant, measurement input	0.39
Warrant
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Warrant	$ 444	$ 1,051	$ 281