Financial Instruments - Warrants - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended	9 Months Ended
	May 26, 2020	Sep. 30, 2021	Sep. 30, 2021
Class Of Warrant Or Right [Line Items]
Warrants outstanding		59,633,274	59,633,274
Warrants expiration date		Jul. 02, 2026	Jul. 02, 2026
Warrants expiration term		5 years	5 years
Fair value of warrants		$ 182	$ 182
Loss (gain) from change in fair value of warrant liabilities		$ 55
Redemption of Warrants When the Price per Share of Class A Common Stock Equals or Exceeds $18.00
Class Of Warrant Or Right [Line Items]
Redemption price per warrant (in dollars per share)			$ 0.01
Stock price trigger for redemption of warrants (in dollars per share)			18.00
Redemption of Warrants When Price per Share of Class A Common Stock Greater than 10.00 but Less than 18.00
Class Of Warrant Or Right [Line Items]
Redemption price per warrant (in dollars per share)			0.10
Redemption of Warrants When Price per Share of Class A Common Stock Greater than 10.00 but Less than 18.00 | Minimum
Class Of Warrant Or Right [Line Items]
Stock price trigger for redemption of warrants (in dollars per share)			10.00
Redemption of Warrants When Price per Share of Class A Common Stock Greater than 10.00 but Less than 18.00 | Maximum
Class Of Warrant Or Right [Line Items]
Stock price trigger for redemption of warrants (in dollars per share)			$ 18.00
Private Placement Warrants
Class Of Warrant Or Right [Line Items]
Number of shares issuable per warrant		1	1
Private Placement Warrants | Class A Common Stock
Class Of Warrant Or Right [Line Items]
Share price per share		$ 11.50	$ 11.50
FTAC | Private Placement Warrants
Class Of Warrant Or Right [Line Items]
Number of warrants issued	15,133,333
FTAC | Public Warrants
Class Of Warrant Or Right [Line Items]
Number of warrants issued	34,499,941
FTAC | Forward Purchase Warrants
Class Of Warrant Or Right [Line Items]
Number of warrants to be purchased	10,000,000