Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Summary of Post-Closing Guarantees) (Details)

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Commitments and Contingencies (Summary of Post-Closing Guarantees) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Guarantor Obligations [Line Items]    
Total $ 61 $ 61
Guarantees    
Guarantor Obligations [Line Items]    
Post-closing credit support at time of sale 81  
Additional post-closing credit support 46  
Total 127  
Fair Value of Guarantees    
Guarantor Obligations [Line Items]    
Post-closing credit support at time of sale 39  
Additional post-closing credit support 22  
Total 61  
Receivable from former Parent    
Guarantor Obligations [Line Items]    
Post-closing credit support at time of sale 26  
Additional post-closing credit support 15  
Total $ 41 $ 41