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Fair Value Measurements, Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Jun. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities $ 5,139,725   $ 5,193,505      
Debt Securities, Held-to-maturity, gross 2,199,059   2,409,090      
Investment securities, Allowance for Credit Loss (234) [1]   (336) [2]      
Investment Securities, Amortized Cost, After Allowance for Credit Loss 2,198,825   2,408,754      
Available-for-sale securities 13,015,986   12,286,681      
Fair value option securities 19,172   20,671      
Residential mortgage loans held for sale 95,494   56,935      
Loans 23,985,061   23,904,968      
Allowance for loan losses (284,456)   (277,123)      
Loans, net of allowance 23,700,605   23,627,845      
Mortgage servicing rights 315,920 $ 333,246 293,884 $ 311,382 $ 304,722 $ 277,608
Derviative contracts, net of cash collateral, Assets, Fair value 334,382   410,304      
Time deposits 3,837,956   3,012,022      
Subordinated debentures 131,188   131,150      
Derivative contracts, net of cash collateral, Liabilities, Fair Value 402,559   587,473      
Commercial [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 14,877,922   14,803,769      
Allowance for loan losses (152,361)   (141,232)      
Commercial real estate [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 5,188,655   5,337,647      
Allowance for loan losses (91,538)   (94,718)      
Loans to individuals [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 3,918,484   3,763,552      
Allowance for loan losses (40,557)   (41,173)      
U.S. government securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 332,466   10,959      
Residential agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 4,672,427   5,105,137      
Debt Securities, Held-to-maturity, gross 2,061,239   2,255,340      
Available-for-sale securities 8,577,928   6,834,720      
Fair value option securities 19,172   20,671      
Municipal securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 76,004   37,413      
Debt Securities, Held-to-maturity, gross 104,775   120,705      
Available-for-sale securities 228,171   502,833      
U.S. Treasury [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 951   925      
Residential non-agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 838,783   799,877      
Commercial agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 17,257   17,258      
Available-for-sale securities 3,369,680   4,147,853      
Other debt securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 58,828   39,996      
Debt Securities, Held-to-maturity, gross 15,788   15,787      
Available-for-sale securities 473   473      
Carrying (Reported) Amount, Fair Value Disclosure [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Cash and due from banks 928,997   947,613      
Interest-bearing cash and cash equivalents 547,043   400,652      
Trading securities 5,139,725   5,193,505      
Debt Securities, Held-to-maturity, gross 2,070,099   2,244,489      
Investment securities, Allowance for Credit Loss (234)   (336)      
Investment Securities, Amortized Cost, After Allowance for Credit Loss 2,069,865   2,244,153      
Available-for-sale securities 13,015,986   12,286,681      
Residential mortgage loans held for sale 95,494   56,935      
Loans 23,985,061   23,904,968      
Allowance for loan losses (284,456)   (277,123)      
Loans, net of allowance 23,700,605   23,627,845      
Mortgage servicing rights 315,920   293,884      
Derviative contracts, net of cash collateral, Assets, Fair value 334,382   410,304      
Deposits with no stated maturity 33,389,162   31,007,679      
Time deposits 3,837,956   3,012,022      
Other borrowed funds 5,473,783   8,824,300      
Subordinated debentures 131,188   131,150      
Derivative contracts, net of cash collateral, Liabilities, Fair Value 402,559   587,473      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 14,877,922   14,803,769      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial real estate [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 5,188,655   5,337,647      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Loans to individuals [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 3,918,484   3,763,552      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. government securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 332,466   10,959      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 4,672,427   5,105,137      
Debt Securities, Held-to-maturity, gross 1,933,393   2,092,083      
Available-for-sale securities 8,577,928   6,834,720      
Fair value option securities 19,172   20,671      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Municipal securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 76,004   37,413      
Debt Securities, Held-to-maturity, gross 104,775   120,705      
Available-for-sale securities 228,171   502,833      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 58,828   39,996      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. Treasury [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 951   925      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 838,783   799,877      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 16,143   15,914      
Available-for-sale securities 3,369,680   4,147,853      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other debt securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 15,788   15,787      
Available-for-sale securities 473   473      
Estimate of Fair Value, Fair Value Disclosure [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Cash and due from banks 928,997   947,613      
Interest-bearing cash and cash equivalents 547,043   400,652      
Trading securities 5,139,725   5,193,505      
Debt Securities, Held-to-maturity, gross 1,937,907   2,072,586      
Investment securities, Allowance for Credit Loss 0   0      
Investment Securities, Amortized Cost, After Allowance for Credit Loss 1,937,907   2,072,586      
Available-for-sale securities 13,015,986   12,286,681      
Residential mortgage loans held for sale 95,494   56,935      
Loans 23,979,005   23,768,385      
Allowance for loan losses 0   0      
Loans, net of allowance 23,979,005   23,768,385      
Mortgage servicing rights 315,920   293,884      
Derviative contracts, net of cash collateral, Assets, Fair value 334,382   410,304      
Deposits with no stated maturity 33,389,162   31,007,679      
Time deposits 3,828,500   2,993,685      
Other borrowed funds 5,473,783   8,824,299      
Subordinated debentures 117,682   115,798      
Derivative contracts, net of cash collateral, Liabilities, Fair Value 402,559   587,473      
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 14,989,899   14,862,873      
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 5,157,125   5,270,657      
Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 3,831,981   3,634,855      
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 332,466   10,959      
Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 4,672,427   5,105,137      
Debt Securities, Held-to-maturity, gross 1,799,308   1,917,810      
Available-for-sale securities 8,577,928   6,834,720      
Fair value option securities 19,172   20,671      
Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 76,004   37,413      
Debt Securities, Held-to-maturity, gross 108,213   125,525      
Available-for-sale securities 228,171   502,833      
Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 58,828   39,996      
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 951   925      
Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 838,783   799,877      
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 15,603   15,067      
Available-for-sale securities 3,369,680   4,147,853      
Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 14,783   14,184      
Available-for-sale securities 473   473      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Cash and due from banks 928,997   947,613      
Interest-bearing cash and cash equivalents 547,043   400,652      
Trading securities 308,370   9,017      
Debt Securities, Held-to-maturity, gross 0   0      
Investment securities, Allowance for Credit Loss 0   0      
Investment Securities, Amortized Cost, After Allowance for Credit Loss 0   0      
Available-for-sale securities 951   925      
Residential mortgage loans held for sale 0   0      
Loans 0   0      
Allowance for loan losses 0   0      
Loans, net of allowance 0   0      
Mortgage servicing rights 0   0      
Derviative contracts, net of cash collateral, Assets, Fair value 1,426   0      
Deposits with no stated maturity 0   0      
Time deposits 0   0      
Other borrowed funds 0   0      
Subordinated debentures 0   0      
Derivative contracts, net of cash collateral, Liabilities, Fair Value 0   2,607      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 0   0      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 0   0      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 0   0      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 308,370   9,017      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 0   0      
Debt Securities, Held-to-maturity, gross 0   0      
Available-for-sale securities 0   0      
Fair value option securities 0   0      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 0   0      
Debt Securities, Held-to-maturity, gross 0   0      
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 0   0      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 951   925      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 0   0      
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 0   0      
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Cash and due from banks 0   0      
Interest-bearing cash and cash equivalents 0   0      
Trading securities 4,831,355   5,184,488      
Debt Securities, Held-to-maturity, gross 1,841,531   1,959,366      
Investment securities, Allowance for Credit Loss 0   0      
Investment Securities, Amortized Cost, After Allowance for Credit Loss 1,841,531   1,959,366      
Available-for-sale securities 13,014,562   12,285,283      
Residential mortgage loans held for sale 88,161   49,749      
Loans 0   0      
Allowance for loan losses 0   0      
Loans, net of allowance 0   0      
Mortgage servicing rights 0   0      
Derviative contracts, net of cash collateral, Assets, Fair value 332,956   410,304      
Deposits with no stated maturity 0   0      
Time deposits 0   0      
Other borrowed funds 0   0      
Subordinated debentures 117,682   115,798      
Derivative contracts, net of cash collateral, Liabilities, Fair Value 402,559   584,866      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 0   0      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 0   0      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 0   0      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 24,096   1,942      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 4,672,427   5,105,137      
Debt Securities, Held-to-maturity, gross 1,799,308   1,917,810      
Available-for-sale securities 8,577,928   6,834,720      
Fair value option securities 19,172   20,671      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 76,004   37,413      
Debt Securities, Held-to-maturity, gross 11,837   12,305      
Available-for-sale securities 228,171   502,833      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 58,828   39,996      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 838,783   799,877      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 15,603   15,067      
Available-for-sale securities 3,369,680   4,147,853      
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 14,783   14,184      
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Cash and due from banks 0   0      
Interest-bearing cash and cash equivalents 0   0      
Trading securities 0   0      
Debt Securities, Held-to-maturity, gross 96,376   113,220      
Investment securities, Allowance for Credit Loss 0   0      
Investment Securities, Amortized Cost, After Allowance for Credit Loss 96,376   113,220      
Available-for-sale securities 473   473      
Residential mortgage loans held for sale 7,333   7,186      
Loans 23,979,005   23,768,385      
Allowance for loan losses 0   0      
Loans, net of allowance 23,979,005   23,768,385      
Mortgage servicing rights 315,920   293,884      
Derviative contracts, net of cash collateral, Assets, Fair value 0   0      
Deposits with no stated maturity 33,389,162   31,007,679      
Time deposits 3,828,500   2,993,685      
Other borrowed funds 5,473,783   8,824,299      
Subordinated debentures 0   0      
Derivative contracts, net of cash collateral, Liabilities, Fair Value 0   0      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 14,989,899   14,862,873      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 5,157,125   5,270,657      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Loans 3,831,981   3,634,855      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 0   0      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 0   0      
Debt Securities, Held-to-maturity, gross 0   0      
Available-for-sale securities 0   0      
Fair value option securities 0   0      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 0   0      
Debt Securities, Held-to-maturity, gross 96,376   113,220      
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Trading securities 0   0      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 0   0      
Available-for-sale securities 0   0      
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Debt Securities, Held-to-maturity, gross 0   0      
Available-for-sale securities $ 473   $ 473      
[1] Carrying value includes $129 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available-for-sale securities portfolio to the investment securities portfolio.
[2] Carrying value includes $165 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available-for-sale securities portfolio to the investment securities portfolio.