XML 162 R151.htm IDEA: XBRL DOCUMENT v3.23.1
Fair Value Of Financial Instruments (Schedule of Mortgage Loans With Election Of Fair Value Option) (Details) - USD ($)
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Fair Value, Option, Quantitative Disclosures [Line Items]                
Fair value $ 487,000,000 $ 495,000,000 $ 528,000,000 $ 537,000,000 $ 739,000,000 $ 792,000,000 $ 818,000,000 $ 874,000,000
Commercial [Member]                
Fair Value, Option, Quantitative Disclosures [Line Items]                
Fair value 487,000,000       739,000,000      
Aggregate contractual principal 514,000,000       742,000,000      
Loans with fair value option in non-accrual 0       0      
Loans with fair value option, 90 days past due and still accruing $ 0       $ 0