Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details)

v3.20.4
Commitments and Contingencies (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]      
Rent expense (less than) $ 1 $ 1 $ 1
Future gross minimum lease payments (less than) $ 1    
Guarantor Obligations [Line Items]      
Percent of guarantee obligation payable by other entities 15.00%    
Financial guarantees      
Guarantor Obligations [Line Items]      
Maximum exposure $ 60