Fair Value Measurements, Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2022		Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	$ 2,194,618			$ 9,136,813
Debt Securities, Held-to-maturity, gross	2,816,352			210,999
Investment securities, Allowance for Credit Loss	(612)	[1]		(555)
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,815,740			210,444
Available for sale securities	10,040,894			13,157,817
Fair value option securities	33,966			43,770
Residential mortgage loans held for sale	148,121			192,295
Loans	21,790,457			20,205,680
Allowance for loan losses	(241,768)			(256,421)
Loans, net of allowance	21,548,689			19,949,259
Mortgage servicing rights	283,806		$ 270,312	163,198	$ 133,308	$ 117,629	$ 101,172
Derviative contracts, net of cash collateral, Assets, Fair value	1,693,742			1,097,297
Time deposits	1,459,143			1,704,328
Subordinated debentures	131,168			131,226
Derivative contracts, net of cash collateral, Liabilities, Fair Value	821,275			275,625
Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	13,607,686			12,506,465
Allowance for loan losses	(141,366)			(162,056)
Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,473,911			3,831,325
Allowance for loan losses	(58,589)			(58,553)
Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	20,233			276,341
Allowance for loan losses	0			0
Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,688,627			3,591,549
Allowance for loan losses	(41,813)			(35,812)
U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	8,757			23,610
Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	2,138,527			9,068,900
Debt Securities, Held-to-maturity, gross	2,614,691			6,939
Available for sale securities	4,894,569			8,006,616
Fair value option securities	33,966			43,770
Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	22,611			25,783
Debt Securities, Held-to-maturity, gross	173,113			203,772
Available for sale securities	619,349			508,365
U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	890			1,000
Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	506,394			24,339
Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	17,260
Available for sale securities	4,019,220			4,617,025
Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,723			18,520
Debt Securities, Held-to-maturity, gross	11,288			288
Available for sale securities	472			472
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	804,110			712,067
Interest-bearing cash and cash equivalents	804,799			2,125,343
Trading securities	2,194,618			9,136,813
Debt Securities, Held-to-maturity, gross	2,572,972			210,999
Investment securities, Allowance for Credit Loss	(612)			(555)
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,572,360			210,444
Available for sale securities	10,040,894			13,157,817
Residential mortgage loans held for sale	148,121			192,295
Loans	21,790,457			20,205,680
Allowance for loan losses	(241,768)			(256,421)
Loans, net of allowance	21,548,689			19,949,259
Mortgage servicing rights	283,806			163,198
Derviative contracts, net of cash collateral, Assets, Fair value	1,693,742			1,097,297
Deposits with no stated maturity	34,956,772			39,537,731
Time deposits	1,459,143			1,704,328
Other borrowed funds	861,885			2,363,202
Subordinated debentures	131,168			131,226
Derivative contracts, net of cash collateral, Liabilities, Fair Value	821,275			275,625
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	13,607,686			12,506,465
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,473,911			3,831,325
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	20,233			276,341
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,688,627			3,591,549
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	8,757			23,610
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	2,138,527			9,068,900
Debt Securities, Held-to-maturity, gross	2,373,039			6,939
Available for sale securities	4,894,569			8,006,616
Fair value option securities	33,966			43,770
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	22,611			25,783
Debt Securities, Held-to-maturity, gross	173,113			203,772
Available for sale securities	619,349			508,365
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,723			18,520
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	890			1,000
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	506,394			24,339
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	15,532
Available for sale securities	4,019,220			4,617,025
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	11,288			288
Available for sale securities	472			472
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	804,110			712,067
Interest-bearing cash and cash equivalents	804,799			2,125,343
Trading securities	2,194,618			9,136,813
Debt Securities, Held-to-maturity, gross	2,407,766			231,395
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,407,766			231,395
Available for sale securities	10,040,894			13,157,817
Residential mortgage loans held for sale	148,121			192,295
Loans	21,082,288			20,039,221
Allowance for loan losses	0			0
Loans, net of allowance	21,082,288			20,039,221
Mortgage servicing rights	283,806			163,198
Derviative contracts, net of cash collateral, Assets, Fair value	1,693,742			1,097,297
Deposits with no stated maturity	34,956,772			39,537,731
Time deposits	1,429,354			1,703,886
Other borrowed funds	859,317			2,360,746
Subordinated debentures	124,153			141,761
Derivative contracts, net of cash collateral, Liabilities, Fair Value	821,275			275,625
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	13,279,531			12,395,664
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,318,977			3,786,767
Estimate of Fair Value, Fair Value Disclosure [Member] | Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	20,233			269,912
Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,463,547			3,586,878
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	8,757			23,610
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	2,138,527			9,068,900
Debt Securities, Held-to-maturity, gross	2,205,333			7,500
Available for sale securities	4,894,569			8,006,616
Fair value option securities	33,966			43,770
Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	22,611			25,783
Debt Securities, Held-to-maturity, gross	176,990			223,609
Available for sale securities	619,349			508,365
Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,723			18,520
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	890			1,000
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	506,394			24,339
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	14,437
Available for sale securities	4,019,220			4,617,025
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	11,006			286
Available for sale securities	472			472
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	804,110			712,067
Interest-bearing cash and cash equivalents	804,799			2,125,343
Trading securities	8,757			4,999
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	890			1,000
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	0			8,331
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			0
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] | Paycheck Protection Program [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	8,757			4,999
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	890			1,000
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
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	2,185,861			9,131,814
Debt Securities, Held-to-maturity, gross	2,270,822			65,484
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,270,822			65,484
Available for sale securities	10,039,532			13,156,345
Residential mortgage loans held for sale	140,211			185,969
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	1,693,742			1,088,966
Deposits with no stated maturity	0			0
Time deposits	0			0
Other borrowed funds	0			0
Subordinated debentures	124,153			141,761
Derivative contracts, net of cash collateral, Liabilities, Fair Value	821,275			275,625
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] | Paycheck Protection Program [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	0			18,611
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	2,138,527			9,068,900
Debt Securities, Held-to-maturity, gross	2,205,333			7,500
Available for sale securities	4,894,569			8,006,616
Fair value option securities	33,966			43,770
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	22,611			25,783
Debt Securities, Held-to-maturity, gross	40,046			57,698
Available for sale securities	619,349			508,365
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	24,723			18,520
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	506,394			24,339
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	14,437
Available for sale securities	4,019,220			4,617,025
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	11,006			286
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	136,944			165,911
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	136,944			165,911
Available for sale securities	472			472
Residential mortgage loans held for sale	7,910			6,326
Loans	21,082,288			20,039,221
Allowance for loan losses	0			0
Loans, net of allowance	21,082,288			20,039,221
Mortgage servicing rights	283,806			163,198
Derviative contracts, net of cash collateral, Assets, Fair value	0			0
Deposits with no stated maturity	34,956,772			39,537,731
Time deposits	1,429,354			1,703,886
Other borrowed funds	859,317			2,360,746
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	13,279,531			12,395,664
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	4,318,977			3,786,767
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	20,233			269,912
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	3,463,547			3,586,878
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	136,944			165,911
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
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	$ 472			$ 472

[1] Carrying value includes $243 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.