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Fair Value Measurements, Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities $ 2,294,358 $ 4,464,161    
Debt Securities, Held-to-maturity, gross 2,657,577 2,739,241    
Investment securities, Allowance for Credit Loss (497) [1] (558) [2]    
Investment Securities, Amortized Cost, After Allowance for Credit Loss 2,657,080 2,738,683    
Available for sale securities 11,937,841 11,493,860    
Fair value option securities 326,390 296,590    
Residential mortgage loans held for sale 74,175 75,272    
Loans 22,750,053 22,557,150    
Allowance for loan losses (249,460) (235,704)    
Loans, net of allowance 22,500,593 22,321,446    
Mortgage servicing rights 299,803 277,608 $ 209,563 $ 163,198
Derviative contracts, net of cash collateral, Assets, Fair value 394,291 880,343    
Time deposits 1,576,610 1,461,842    
Subordinated debentures 131,148 131,205    
Derivative contracts, net of cash collateral, Liabilities, Fair Value 510,483 554,900    
Commercial [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Loans 14,217,349 14,212,499    
Allowance for loan losses (139,898) (131,586)    
Commercial real estate [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Loans 4,815,316 4,606,777    
Allowance for loan losses (66,003) (57,648)    
Loans to individuals [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Loans 3,717,388 3,737,874    
Allowance for loan losses (43,559) (46,470)    
U.S. government securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 5,618 9,823    
Residential agency mortgage-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 2,210,721 4,406,848    
Debt Securities, Held-to-maturity, gross 2,472,291 2,538,565    
Available for sale securities 6,022,708 5,814,496    
Fair value option securities 220,083 296,590    
Municipal securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 37,455 21,484    
Debt Securities, Held-to-maturity, gross 153,739 170,629    
Available for sale securities 634,207 624,500    
Asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 10,194 0    
U.S. Treasury [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available for sale securities 914 898    
Fair value option securities 106,307 0    
Residential non-agency mortgage-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available for sale securities 651,351 577,576    
Commercial agency mortgage-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt Securities, Held-to-maturity, gross 17,259 17,259    
Available for sale securities 4,628,188 4,475,917    
Other debt securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 30,370 26,006    
Debt Securities, Held-to-maturity, gross 14,288 12,788    
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 792,371 943,810    
Interest-bearing cash and cash equivalents 571,613 457,906    
Trading securities 2,294,358 4,464,161    
Debt Securities, Held-to-maturity, gross 2,448,633 2,514,245    
Investment securities, Allowance for Credit Loss (497) (558)    
Investment Securities, Amortized Cost, After Allowance for Credit Loss 2,448,136 2,513,687    
Available for sale securities 11,937,841 11,493,860    
Fair value option securities 326,390      
Residential mortgage loans held for sale 74,175 75,272    
Loans 22,750,053 22,557,150    
Allowance for loan losses (249,460) (235,704)    
Loans, net of allowance 22,500,593 22,321,446    
Mortgage servicing rights 299,803 277,608    
Derviative contracts, net of cash collateral, Assets, Fair value 394,291 880,343    
Deposits with no stated maturity 31,004,137 33,018,863    
Time deposits 1,576,610 1,461,842    
Other borrowed funds 6,335,609 7,007,285    
Subordinated debentures 131,148 131,205    
Derivative contracts, net of cash collateral, Liabilities, Fair Value 510,483 554,900    
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Loans 14,217,349 14,212,499    
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial real estate [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Loans 4,815,316 4,606,777    
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Loans to individuals [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Loans 3,717,388 3,737,874    
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. government securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 5,618 9,823    
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 2,210,721 4,406,848    
Debt Securities, Held-to-maturity, gross 2,264,922 2,315,219    
Available for sale securities 6,022,708 5,814,496    
Fair value option securities 220,083 296,590    
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Municipal securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 37,455 21,484    
Debt Securities, Held-to-maturity, gross 153,739 170,629    
Available for sale securities 634,207 624,500    
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 10,194      
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 30,370 26,006    
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 914 898    
Fair value option securities 106,307      
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 651,351 577,576    
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 15,684 15,609    
Available for sale securities 4,628,188 4,475,917    
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 14,288 12,788    
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 792,371 943,810    
Interest-bearing cash and cash equivalents 571,613 457,906    
Trading securities 2,294,358 4,464,161    
Debt Securities, Held-to-maturity, gross 2,307,686 2,346,768    
Investment securities, Allowance for Credit Loss 0 0    
Investment Securities, Amortized Cost, After Allowance for Credit Loss 2,307,686 2,346,768    
Available for sale securities 11,937,841 11,493,860    
Fair value option securities 326,390      
Residential mortgage loans held for sale 74,175 75,272    
Loans 22,380,424 21,891,223    
Allowance for loan losses 0 0    
Loans, net of allowance 22,380,424 21,891,223    
Mortgage servicing rights 299,803 277,608    
Derviative contracts, net of cash collateral, Assets, Fair value 394,291 880,343    
Deposits with no stated maturity 31,004,137 33,018,863    
Time deposits 1,547,154 1,431,245    
Other borrowed funds 6,333,599 7,005,305    
Subordinated debentures 125,077 121,497    
Derivative contracts, net of cash collateral, Liabilities, Fair Value 510,483 554,900    
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Loans 14,129,311 13,905,765    
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Loans 4,703,787 4,454,048    
Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Loans 3,547,326 3,531,410    
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 5,618 9,823    
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 2,210,721 4,406,848    
Debt Securities, Held-to-maturity, gross 2,118,538 2,143,360    
Available for sale securities 6,022,708 5,814,496    
Fair value option securities 220,083 296,590    
Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 37,455 21,484    
Debt Securities, Held-to-maturity, gross 160,866 176,621    
Available for sale securities 634,207 624,500    
Estimate of Fair Value, Fair Value Disclosure [Member] | Asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 10,194      
Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 30,370 26,006    
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 914 898    
Fair value option securities 106,307      
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 651,351 577,576    
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 14,861 14,588    
Available for sale securities 4,628,188 4,475,917    
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 13,421 12,199    
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 792,371 943,810    
Interest-bearing cash and cash equivalents 571,613 457,906    
Trading securities 4,878 4,970    
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 914 898    
Fair value option securities 106,307      
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 303 2,110    
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 3,822 16    
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 4,878 4,970    
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] | Asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 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 914 898    
Fair value option securities 106,307      
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 2,289,480 4,459,191    
Debt Securities, Held-to-maturity, gross 2,179,978 2,208,253    
Investment securities, Allowance for Credit Loss 0 0    
Investment Securities, Amortized Cost, After Allowance for Credit Loss 2,179,978 2,208,253    
Available for sale securities 11,936,454 11,492,489    
Fair value option securities 220,083      
Residential mortgage loans held for sale 67,024 68,054    
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 393,988 878,233    
Deposits with no stated maturity 0 0    
Time deposits 0 0    
Other borrowed funds 0 0    
Subordinated debentures 125,077 121,497    
Derivative contracts, net of cash collateral, Liabilities, Fair Value 506,661 554,884    
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 740 4,853    
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 2,210,721 4,406,848    
Debt Securities, Held-to-maturity, gross 2,118,538 2,143,360    
Available for sale securities 6,022,708 5,814,496    
Fair value option securities 220,083 296,590    
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 37,455 21,484    
Debt Securities, Held-to-maturity, gross 33,158 38,106    
Available for sale securities 634,207 624,500    
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 10,194      
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 30,370 26,006    
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 option securities 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 651,351 577,576    
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 14,861 14,588    
Available for sale securities 4,628,188 4,475,917    
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 13,421 12,199    
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 127,708 138,515    
Investment securities, Allowance for Credit Loss 0 0    
Investment Securities, Amortized Cost, After Allowance for Credit Loss 127,708 138,515    
Available for sale securities 473 473    
Fair value option securities 0      
Residential mortgage loans held for sale 7,151 7,218    
Loans 22,380,424 21,891,223    
Allowance for loan losses 0 0    
Loans, net of allowance 22,380,424 21,891,223    
Mortgage servicing rights 299,803 277,608    
Derviative contracts, net of cash collateral, Assets, Fair value 0 0    
Deposits with no stated maturity 31,004,137 33,018,863    
Time deposits 1,547,154 1,431,245    
Other borrowed funds 6,333,599 7,005,305    
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 14,129,311 13,905,765    
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 4,703,787 4,454,048    
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 3,547,326 3,531,410    
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 127,708 138,515    
Available for sale securities 0 0    
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Trading securities 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 option securities 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 $209 million of net unrealized loss which remains in Accumulated other comprehensive income ("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 as discussed in greater detail following.
[2] Carrying value includes $225 million of net unrealized loss which remains in Accumulated other comprehensive income ("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 as discussed in greater detail following.