Fair Value Measurement of Assets and Liabilities - Warrants Measured Valued Using Unobservable Inputs (Details) - Recurring - Significant Unobservable Inputs (Level 3) - Warrant - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2022	Jun. 30, 2021	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 444	$ 1,051	$ 1,051
Exercise of options under warrant	0		(961)
Change in fair value	(115)	$ 354
Ending balance	$ 329		$ 444