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Short and Long-term Funding Short and Long-term Funding (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 13, 2014
Mar. 31, 2022
Feb. 06, 2023
Dec. 31, 2022
Dec. 31, 2021
Long-Term Funding          
Junior Subordinated Debentures Issued     $ 300    
Fair Value of Pledged Securities to Securities Sold under Agreements to Repurchase       169.00%  
Weighted Average Coupon Rate       4.06% 2.05%
Prepayment of FHLB Advances   $ 400      
Maximum          
Long-Term Funding          
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged       $ 8,800  
Two Thousand Fourteen Subordinated Notes [Member]          
Long-Term Funding          
Junior Subordinated Debentures Issued $ 250        
Debt Instrument, Term 10 years        
Debt Instrument, Maturity Date Month, Year January 2025        
Debt Instrument Call Date Earliest Month Year October 2024        
Subordinated Borrowing, Interest Rate 4.25%