XML 96 R70.htm IDEA: XBRL DOCUMENT v3.24.0.1
Investments (Tax and Nontaxable Income by Investment Type) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Net Investment Income [Line Items]      
Held-to-maturity $ 239 $ 46 $ 15
Available-for-sale 322 451 285
Trading 2 15 11
Interest on securities 563 512 311
Taxable      
Net Investment Income [Line Items]      
Held-to-maturity 236 42 10
Available-for-sale 291 411 256
Trading 0 0 0
Interest on securities 527 453 266
Nontaxable      
Net Investment Income [Line Items]      
Held-to-maturity 3 4 5
Available-for-sale 31 40 29
Trading 2 15 11
Interest on securities $ 36 $ 59 $ 45