XML 48 R38.htm IDEA: XBRL DOCUMENT v3.23.1
Investments (Details) - Investment Information, Equity Securities - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Investment disclosure details      
Equity securities, cost $ 592   $ 747
Gross gains 82   92
Gross losses 25   32
Equity securities, at fair value 649   807
Net recognized gains (losses) on equity securities still held 17 $ (14)  
Common stock [Member]      
Investment disclosure details      
Equity securities, cost 549   706
Gross gains 79   89
Gross losses 25   32
Equity securities, at fair value 603   763
Non-redeemable preferred stock [Member]      
Investment disclosure details      
Equity securities, cost 43   41
Gross gains 3   3
Gross losses 0   0
Equity securities, at fair value $ 46   $ 44