Flagstar Bancorp (FBC) 10-K 26 Feb 21 2020 FY Annual report Financial data

Cover

Cover - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Feb. 25, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-16577
Entity Registrant Name	Flagstar Bancorp, Inc
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-3150651
Entity Address, Address Line One	5151 Corporate Drive,
Entity Address, City or Town	Troy,
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48098-2639
City Area Code	248
Local Phone Number	312-2000
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	FBC
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2
Entity Common Stock, Shares Outstanding		52,679,147
Documents Incorporated by Reference	Portions of the registrant’s Proxy Statement relating to the 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Report on Form 10-K.
Entity Central Index Key	0001033012
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash	$ 251	$ 220
Interest-earning deposits	372	206
Total cash and cash equivalents	623	426
Investment securities available-for-sale	1,944	2,116
Investment securities held-to-maturity	377	598
Loans held-for-sale ($7,009 and $5,219 measured at fair value, respectively)	7,098	5,258
Loans held-for-investment ($13 and $12 measured at fair value, respectively)	16,227	12,129
Loans with government guarantees	2,516	736
Less: allowance for loan losses	(252)	(107)
Total loans held-for-investment and loans with government guarantees, net	18,491	12,758
Mortgage servicing rights	329	291
Federal Home Loan Bank stock	377	303
Premises and equipment, net	392	416
Goodwill and intangible assets	157	170
Other assets	1,250	930
Total assets	31,038	23,266
Liabilities and Stockholders’ Equity
Non-interest bearing deposits	9,458	5,467
Interest bearing deposits	10,515	9,679
Total deposits	19,973	15,146
Short-term Federal Home Loan Bank advances and other	3,900	4,165
Long-term Federal Home Loan Bank advances	1,200	650
Other long-term debt	641	496
Loans with government guarantees repurchase options	1,851	70
Other liabilities ($35 and $35 measured at fair value, respectively)	1,272	951
Total liabilities	28,837	21,478
Stockholders’ Equity
Common stock $0.01 par value, 80,000,000 and 80,000,000 shares authorized; 52,656,067 and 56,631,236 shares issued and outstanding, respectively	1	1
Additional paid in capital	1,346	1,483
Accumulated other comprehensive income	47	1
Retained earnings	807	303
Total stockholders’ equity	2,201	1,788
Total liabilities and stockholders’ equity	$ 31,038	$ 23,266

Consolidated Statements of Fi_2

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Loans held-for-sale, fair value	$ 7,009	$ 5,219
Loans held-for-investment, fair value	13	12
Liabilities and Stockholders’ Equity
Other liabilities, fair value	$ 35	$ 35
Stockholders’ Equity
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	52,656,067	56,631,236
Common stock, shares outstanding (in shares)	52,656,067	56,631,236

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest Income
Loans	$ 748	$ 713	$ 595
Investment securities	70	77	86
Interest-earning deposits and other	1	4	2
Total interest income	819	794	683
Interest Expense
Deposits	81	138	94
Short-term Federal Home Loan Bank advances and other	16	59	68
Long-term Federal Home Loan Bank advances	12	7	(4)
Other long-term debt	25	28	28
Total interest expense	134	232	186
Net interest income	685	562	497
Provision (benefit) for credit losses	149	18	(8)
Net interest income after provision (benefit) for credit losses	536	544	505
Noninterest Income
Net gain on loan sales	971	335	200
Loan fees and charges	165	100	87
Net return on mortgage servicing rights	10	6	36
Loan administration income	84	30	23
Deposit fees and charges	32	38	21
Other noninterest income	63	101	72
Total noninterest income	1,325	610	439
Noninterest Expense
Compensation and benefits	466	377	318
Occupancy and equipment	176	161	127
Commissions	232	111	80
Loan processing expense	98	80	59
Legal and professional expense	31	27	28
Federal insurance premiums	24	20	22
Intangible asset amortization	13	15	5
Other noninterest expense	117	97	73
Total noninterest expense	1,157	888	712
Income before income taxes	704	266	232
Provision for income taxes	166	48	45
Net income	$ 538	$ 218	$ 187
Net income per share
Basic (in usd per share)	$ 9.59	$ 3.85	$ 3.26
Diluted (in usd per share)	$ 9.52	$ 3.80	$ 3.21
Weighted average shares outstanding
Basic (in shares)	56,094,542	56,584,238	57,520,289
Diluted (in shares)	56,505,813	57,238,978	58,322,950

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 538,000,000	$ 218,000,000	$ 187,000,000
Other comprehensive income (loss), net of tax
Investment securities	51,000,000	48,000,000	(29,000,000)
Derivatives and hedging activities	(5,000,000)	0	(2,000,000)
Other comprehensive income (loss), net of tax	46,000,000	48,000,000	(31,000,000)
Comprehensive income	$ 584,000,000	$ 266,000,000	$ 156,000,000

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions		Total	CECL ASU Adjustment to RE	Common Stock	Additional Paid in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit)CECL ASU Adjustment to RE
Balance (in shares) at Dec. 31, 2017				57,321,228
Beginning balance at Dec. 31, 2017		$ 1,399		$ 1	$ 1,512	$ (16)	$ (98)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		187					187
Total other comprehensive income (loss)		(26)				(26)
Other comprehensive income (loss), net of tax		(31)
Shares issued for Employee Stock Purchase Plan (in shares)				114,385
Shares issued from the Employee Stock Purchase Plan		10			10
Stock-based compensation (in shares)				318,560
Reclassification of certain income tax effects	[1]	0				(5)	5
Repurchase of common shares (in shares)	[2]			(4,709)
Balance (in shares) at Dec. 31, 2018				57,749,464
Ending balance at Dec. 31, 2018		1,570		$ 1	1,522	(47)	94
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		218					218
Other comprehensive income (loss), net of tax		48				48
Shares issued for Employee Stock Purchase Plan (in shares)				106,881
Dividends declared and paid (in shares)				376
Dividends declared and paid		(9)					(9)
Stock-based compensation (in shares)				292,220
Stock-based compensation		11			11
Repurchase of common shares (in shares)	[2]			(1,517,705)
Repurchase of common shares	[2]	(50)			(50)
Balance (in shares) at Dec. 31, 2019				56,631,236
Ending balance at Dec. 31, 2019		1,788	$ (23)	$ 1	1,483	1	303	$ (23)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		538					538
Other comprehensive income (loss), net of tax		46				46
Shares issued for Employee Stock Purchase Plan (in shares)				181,875
Dividends declared and paid (in shares)				729
Dividends declared and paid		(11)					(11)
Stock-based compensation (in shares)				429,874
Stock-based compensation		$ 13			13
Repurchase of common shares (in shares)	[2]	(4,587,647)
Repurchase of common shares	[2]	$ (150)			(150)
Balance (in shares) at Dec. 31, 2020				52,656,067
Ending balance at Dec. 31, 2020		$ 2,201		$ 1	$ 1,346	$ 47	$ 807
[1]	Income tax effects of the Tax Cuts and Jobs Act are reclassified from AOCI to retained earnings due to the adoption of ASU 2018-02.
[2]	Includes dividend reinvestment shares.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activities
Net income		$ 538	$ 218	$ 187
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization		76	70	56
Provision (benefit) for credit losses		149	18	(8)
Net gain on loan and asset sales		(971)	(335)	(200)
Proceeds from sales of HFS		41,799	15,866	8,935
Origination, premium paid and purchase of loans, net of principal repayments		(48,857)	(32,715)	(32,261)
Net change in:
Other		(763)	(205)	(87)
Net cash used in operating activities		(8,029)	(17,083)	(23,378)
Investing Activities
Proceeds from sale of AFS securities including loans that have been securitized		6,756	15,873	23,721
Collection of principal on investment securities AFS		610	184	199
Purchase of investment securities AFS and other		(360)	(500)	(340)
Collection of principal on investment securities HTM		221	106	92
Proceeds received from the sale of LHFI		488	219	161
Net origination, purchase, and principal repayments of LHFI		(4,650)	(3,179)	(978)
Acquisition of premises and equipment, net of proceeds		(54)	(61)	(71)
Net purchase of FHLB stock		74	0	0
Proceeds from the sale of MSRs		65	62	334
Assets acquired in business combinations		0	0	1,499
Other, net		(16)	(16)	(10)
Net cash provided by investing activities		2,986	12,688	24,607
Financing Activities
Net change in deposit accounts		4,826	2,766	1,072
Net change in short-term FHLB borrowings and other short-term debt		(265)	923	(1,016)
Proceeds from increases in FHLB long-term advances and other debt		550	550	200
Repayment of long-term FHLB advances		0	(50)	(1,455)
Repayment of long-term debt		(3)	0	0
Proceeds from issuance of subordinated debt		150	0	0
Subordinated debt issuance costs		(2)	0	0
Net receipt of payments of loans serviced for others		165	284	181
Dividends declared and paid		(11)	(9)	0
Stock repurchase		(150)	(50)	0
Other		(19)	5	(2)
Net cash provided by (used in) by financing activities		5,241	4,419	(1,020)
Net increase (decrease) in cash, cash equivalents and restricted cash	[1]	198	24	209
Beginning cash, cash equivalents and restricted cash	[1]	456	432	223
Ending cash, cash equivalents and restricted cash	[1]	654	456	432
Supplemental disclosure of cash flow information
Interest paid on deposits and other borrowings		133	230	185
Income tax payments		161	4	0
Non-cash reclassification of investment securities HTM to AFS		0	0	144
Non-cash reclassification of loans originated LHFI to LHFS		549	120	279
Non-cash reclassification of LHFS to AFS securities		6,761	15,458	23,718
MSRs resulting from sale or securitization of loans		$ 268	$ 223	$ 356
[1]	For further information on restricted cash, see Note 11 - Derivatives.

Description of Business, Basis

Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies	Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies Description of Business Flagstar Bancorp, Inc., is a savings and loan holding company founded in 1993. The Company's business is primarily conducted through its principal subsidiary, Flagstar Bank, FSB (the "Bank"), a federally chartered stock savings bank founded in 1987. We are one of the largest banks headquartered in Michigan. When we refer to "Flagstar", "the Company", "we", "our", or "us," we mean Flagstar Bancorp, Inc. and our consolidated subsidiaries. The Company is subject to regulation, examination and supervision by the Federal Reserve. The Bank is subject to regulation, examination and supervision by the OCC of the U.S. Department of the Treasury, the CFPB and the FDIC. The Bank is a member of the FHLB of Indianapolis and its deposits are insured by the FDIC through the Deposit Insurance Fund. Consolidation and Basis of Presentation Our accounting and financial reporting policies conform to accounting principles generally accepted in the United States. Additionally, where applicable the policies conform to the accounting and reporting guidelines prescribed by regulatory authorities. Certain prior period amounts have been reclassified to conform to the current period presentation. The preparation of the Consolidated Financial Statements, requires Management to make estimates and assumptions that affect reported amounts of assets and liabilities, revenues and expenses and disclosures of contingent assets and liabilities. Actual results could be materially different from these estimates. Subsequent Events We have evaluated all subsequent events for potential recognition and disclosure through the filing date of this Form 10-K. Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents include cash on hand, amounts due from correspondent banks and the FRB, and short-term investments that have a maturity at the date of acquisition of three months or less and are readily convertible to cash. Restricted cash includes cash that the Bank pledges as maintenance margin on centrally cleared derivatives and is included in other assets on the Consolidated Statements of Financial Condition. Investment Securities We measure securities classified as AFS at fair value, with unrealized gains and losses, net of tax, included in other comprehensive income (loss) in stockholders’ equity. We recognize realized gains and losses on AFS securities when securities are sold. The cost of securities sold is based on the specific identification method. Any gains or losses realized upon the sale of a security are reported in other noninterest income in the Consolidated Statements of Operations. The fair value of investment securities is based on observable market prices, when available. If observable market prices are not available, our valuations are based on alternative methods, including: quotes for similar fixed-income securities, matrix pricing, or discounted cash flow methods. The fair values, obtained through an independent third party utilizing a pricing service, are compared to independent pricing sources on a quarterly basis. For further information, see Note 2 - Investment Securities and Note 20 - Fair Value Measurements. Investment securities HTM are carried at amortized cost and are adjusted for amortization of premiums and accretion of discounts using the interest method. Transfers of investment securities into the HTM category from the AFS category are accounted for at fair value at the date of transfer. Any related unrealized holding gain (loss), net of tax, that was included in the transfer is retained in other comprehensive income (loss) and is amortized as an adjustment to interest income over the remaining life of the securities. We separately evaluate our HTM debt securities for any credit losses. For each of the three years ended December 31, 2020, all investment securities HTM held by us were issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses; therefore, we apply a zero credit loss assumption to this portfolio and did not record any credit allowance for each of the three years ended December 31, 2020. We evaluate AFS debt securities where the value has declined below amortized cost for impairment. If we intend to sell or believe it is more likely than not that we will be required to sell the debt security, it is written down to fair value through earnings. For AFS debt securities we intend to hold, we evaluate the debt securities for expected credit losses, except for debt securities that are guaranteed by the U.S. Treasury, U.S. government agencies or sovereign entities of high credit quality for which we apply a zero loss assumption, comprised 94 percent of our AFS portfolio at December 31, 2020. For the remaining AFS securities, credit losses are recognized as an increase to the ACL through the credit loss provision. If any of the decline in fair value is related to market factors, that amount is recognized in OCI. For the three years ended December 31, 2020, we had no unrealized credit losses Investment securities transactions are recorded on the trade date for purchases and sales. Interest earned on investment securities, including the amortization of premiums and the accretion of discounts, are determined using the effective interest method over the period of maturity and recorded in interest income in the Consolidated Statements of Operations. Accrued interest receivable on investment securities totaled $5 million at December 31, 2020 and was reported in Other assets on the Consolidated Statements of Financial Condition. Loans Held-for-Sale We classify loans as LHFS when we originate or purchase loans that we intend to sell. We have elected the fair value option for the majority of our LHFS. We estimate the fair value of mortgage loans based on quoted market prices for securities backed by similar types of loans, where available, or by discounting estimated cash flows using observable inputs inclusive of interest rates, prepayment speeds and loss assumptions for similar collateral. LHFS that are recorded at lower of cost or fair value may be carried at fair value on a nonrecurring basis when the fair value is less than cost. For further information, see Note 20 - Fair Value Measurements. Loans that are transferred into the LHFS portfolio from the LHFI portfolio, due to a change in intent, are recorded at the lower of cost or fair value. Gains or losses recognized upon the sale of loans are determined using the specific identification method. Loans Held-for-Investment We classify loans that we have the intent and ability to hold for the foreseeable future or until maturity as LHFI. Loans held-for-investment are reported at their amortized cost, which includes the outstanding principal balance adjusted for any unamortized premiums, discounts, deferred fees and costs. Accrued interest receivable on loans held-for-for investment totaled $43 million at December 31, 2020 and was reported in Other assets on the Consolidated Statements of Financial Condition. Premiums and discounts on purchased loans and non-refundable loan origination and commitment fees, net of direct costs of originating or acquiring loans, are deferred and recognized over the life of the related loans as an adjustment to the loans’ effective yield, which is included in interest income on loans in the Consolidated Statements of Operations. Loans originally classified as LHFS, for which we have elected the fair value option, and subsequently transferred to LHFI continue to be measured and reported at fair value on a recurring basis. Changes in fair value are recorded to other noninterest income on the Consolidated Statements of Operations. The fair value of these loans is determined using the same methods described above for LHFS. For further information, see Note 20 - Fair Value Measurements. When loans originally classified as LHFS or as LHFI are reclassified due to a change in intent or ability to hold, cash flows associated with the loans are classified in the Consolidated Statements of Cash Flows as operating or investing, in accordance with the initial classification of the loans. Past Due, Impaired and Modified (Troubled Debt Restructuring) Loans Loans are considered to be past due when any payment of principal or interest is 30 days past the scheduled payment date. While it is the goal of Management to collect on loans, we attempt to work out a satisfactory repayment schedule or modification with past due borrowers and will undertake foreclosure proceedings if the delinquency is not satisfactorily resolved. Our practices regarding past due loans are designed to both assist borrowers in meeting their contractual obligations and minimize losses incurred by the bank. We cease the accrual of interest on all classes of consumer and commercial loans upon the earlier of, becoming 90 days past due, or when doubt exists as to the ultimate collection of principal or interest (classified as nonaccrual or NPLs). When a loan is placed on nonaccrual status, the accrued interest income is reversed against interest income and the loan may only return to accrual status when principal and interest become current and are anticipated to be fully collectible. We do not measure an ACL for accrued interest receivables as accrued interest is written off in a timely manner. Loans are considered impaired if it is probable that payment of all interest and principal will not be made in accordance with the original contractual terms of the loan agreement or when any portion of principal or interest is 90 days past due. This classification includes both performing and nonperforming modified loans. For further information, see Note 4 - Loans Held-for-Investment. When a loan is considered impaired, the accrual of interest income is discontinued until the receipt of principal and interest is no longer in doubt. Interest income is recognized on impaired loans using a cost recovery method unless amounts contractually due are not in doubt. Cash received on nonperforming impaired loans is applied entirely against principal until the loan has been collected in full, after which time any additional cash receipts are recognized as interest income. Loan Modifications (Troubled Debt Restructurings) We may modify certain loans in both our consumer and commercial loan portfolios to retain customers or to maximize collection of the outstanding loan balance. We have programs designed to assist borrowers by extending payment dates or reducing the borrower's contractual payments. All loan modifications are made on a case-by-case basis. Our standards relating to loan modifications consider, among other factors, minimum verified income requirements, cash flow analysis and collateral valuations. TDRs result in those instances in which a borrower demonstrates financial difficulty and for which a concession has been granted, including reductions of interest rates, extensions of amortization periods, principal and/or interest forgiveness and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of collateral. These loans are classified as nonperforming TDRs if the loan was nonperforming prior to the restructuring, or based upon the results of a contemporaneous credit evaluation. Such loans will continue on nonaccrual status until the borrower has established a willingness and ability to make the restructured payments for at least six months, after which they will be classified as performing TDRs and will begin to accrue interest. Performing and nonperforming TDRs remain impaired as interest and principal will not be received in accordance with the original contractual terms of the loan agreement. Some loan modifications classified as TDRs may not ultimately result in the full collection of principal and interest, as modified, but may give rise to potential incremental losses. We measure impairments using a discounted cash flow method for performing TDRs and measure impairment based on collateral values for collateral-dependent nonperforming TDRs. Allowance for Credit Losses on Loans The ACL represents Management's estimate of expected lifetime losses in our LHFI portfolio, excluding loans carried under the fair value option. In addition, we record a reserve for expected lifetime losses on our unfunded commitments - see Reserve for Unfunded Commitments section below. Therefore, we record ALLL on relevant financial assets and a reserve for unfunded commitments on our Consolidated Statements of Financial Condition, collectively referred to as the ACL. Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual terms excludes expected extensions, renewals, and modifications unless either of the following applies: Management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by us. The ACL is impacted by changes in asset quality of the portfolio, including but not limited to increases in risk rating changes in our commercial portfolio, borrower delinquencies, changes in FICO scores or changes in LTVs in our consumer portfolio. In addition, while we have incorporated our forecasted impact of COVID-19 into our ACL, the ultimate impact of COVID-19 is still uncertain, including how long economic activity will be impacted by the pandemic and what effect the unprecedented levels of government fiscal and monetary actions will have on the economy and our credit losses. Specifically identified component. The specifically identified component of the ACL related to performing TDR loans is generally measured as the difference between the recorded investment in the specific loan and the present value of the cash flows expected to be collected, discounted at the loan’s original effective interest rate. Estimating the timing and amounts of future cash flow projections is highly judgmental and based upon assumptions including default rates, prepayment probability and loss severities. All of these estimates and assumptions require significant management judgment and certain assumptions are highly subjective. Specifically identified collateral dependent NPL loans are generally measured as the difference between the recorded investment in the impaired loan and the underlying collateral value less estimated costs to sell. These estimates are dependent on third-party property valuations which may be influenced by factors such as the current and future level of home prices, the duration of current overall economic conditions, and other macroeconomic and portfolio-specific factors. Model-based component. A general allowance is established for expected lifetime losses on non-impaired loans by segmenting the portfolio based upon common risk characteristics. Our consumer loan portfolio is broadly segmented into Residential First Mortgage, Home Equity and Other Consumer. Risks for these segments include lien position, credit quality, and loan structure. Our commercial loans are broadly segmented into Commercial Real Estate, Commercial and Industrial, and Warehouse Lending. Risks for these segments include credit quality and loan structure. The general allowance is determined using dual risk rating models which use probability of default, loss given default and exposure at default. These models incorporate macroeconomic forecast scenarios applied over a 2-year reasonable and supportable forecast period. After this forecast period, we revert on a straight-line basis over a 1-year period to historical averages which are utilized for the remaining contractual life, adjusted for expected prepayments and borrower controlled extension options. The macroeconomic scenarios include variables that, based on historical analysis, have been key drivers of increases and decreases in credit losses. These variables include unemployment rates, real estate prices, and gross domestic product levels. Qualitative adjustments. The specifically identified component analysis and the output of the model provide a reasonable starting point for our analysis, but do not, by themselves, form a sufficient basis to determine the appropriate level for the ACL. We therefore consider the qualitative factors that are likely to cause the ACL associated with our existing portfolio to differ from the output of the model. The most significant qualitative factors considered include changes in economic and business conditions, changes in nature and volume of portfolio and changes in the volume and severity of past due loans. The application of different inputs into the model calculation and the assumptions used by Management to adjust the model calculation are subject to significant management judgment and may result in actual credit losses that differ from the originally estimated amounts. Credit Losses Consumer loans secured by real estate are charged-off to the estimated fair value of the collateral when a loss is confirmed or at 180 days past due, whichever is sooner. Loss confirming events include, but are not limited to, bankruptcy (unsecured), continued delinquency, foreclosure or receipt of an asset valuation indicating a collateral deficiency and the asset is the sole source of repayment. For consumer loans not secured by real estate, the charge-off is taken upon the earlier of the confirmation of a loss or 120 days past due. Commercial loans are evaluated on a loan level basis and either charged-off or written down to net realizable value if a loss confirming event has occurred. Loss confirming events include, but are not limited to, bankruptcy (unsecured), continued delinquency, foreclosure, or receipt of an asset valuation indicating a collateral deficiency and that asset is the sole source of repayment. Recoveries of past charge-offs are credited to the allowance for previously charged-off principal, interest and expenses after principal, interest, and fees of the loan are collected. Reserve for Unfunded Commitments We estimate expected credit losses over the contractual period in which we are exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by us. The ACL on unfunded commitments is adjusted as a provision for credit loss expense within the provision (benefit) for credit losses on the Consolidated Statements of Operations and is recorded in other liabilities on the Consolidated Statements of Financial Condition. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. The reserve for unfunded commitments is included in other liabilities on the Consolidated Statements of Financial Condition. These credit exposures include unfunded loans with available balances, new commitments to lend that are not yet funded, and standby and commercial letters of credit. For further information, see Note 19 – Legal Proceedings, Contingencies and Commitments. Transfers of Financial Assets Our recognition of gain or loss on the sale of loans for which we surrender control is accounted for as a sale to the extent that 1) the transferred assets are legally isolated from us or our consolidated affiliates, even in bankruptcy or other receivership, 2) the transferee has the right to pledge or exchange the assets with no conditions that constrain the transferee and provide more than a trivial benefit to the Company and 3) we do not maintain the obligation or unilateral ability to reclaim or repurchase the assets. If the sale criteria are met, the transferred financial assets are removed from the Consolidated Statements of Financial Condition and a gain or loss on sale is recognized. Variable Interest Entities An entity that has a controlling financial interest in a VIE is referred to as the primary beneficiary and consolidates the VIE. An entity is deemed to have a controlling financial interest and is the primary beneficiary of a VIE if it has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. For further information, see Note 7 - Variable Interest Entities. Repossessed Assets Repossessed assets include one-to-four family residential property, commercial property and one-to-four family homes under construction that were acquired through foreclosure or acceptance of a deed-in-lieu of foreclosure. Repossessed assets are initially recorded in other assets at the estimated fair value of the collateral less estimated costs to sell. Losses arising from the initial acquisition of such properties are charged against the allowance for loan losses at the time of transfer. Subsequent valuation adjustments to reflect fair value, as well as gains and losses on disposal of these properties, are charged to other noninterest expense within noninterest expense in the Consolidated Statements of Operations as incurred. For further information, see Note 6 - Repossessed Assets and Note 20 - Fair Value Measurements. Loans with Government Guarantees We originate government guaranteed loans which are pooled and sold as Ginnie Mae MBS. Pursuant to Ginnie Mae servicing guidelines, we have the unilateral right to repurchase loans securitized in Ginnie Mae pools that are due, but unpaid, for three consecutive months. As a result, once the delinquency criteria have been met, and regardless of whether the repurchase option has been exercised, we account for the loans as if they had been repurchased. We recognize the loans and corresponding liability as loans with government guarantees and loans with government guarantees repurchase options, respectively, in the Consolidated Statements of Financial Condition. If the loan is repurchased, the liability is cash settled and the loan with government guarantee remains. Once repurchased, we may recover losses through a claims process with the government agency, as an approved lender. Federal Home Loan Bank Stock We own stock in the FHLB of Indianapolis, as required to permit us to obtain membership in and to borrow from the FHLB. The stock is redeemable at par and is carried at cost as no market quotes exist for the stock. Premises and Equipment Premises and equipment are carried at cost less accumulated depreciation. Land is carried at cost. Depreciation is calculated on a straight-line basis over the estimated useful lives of the assets, which generally ranges from three Goodwill and Intangible Assets The excess of the cost of an acquisition over the fair value of the net assets acquired consists primarily of goodwill, core deposit intangibles and other identifiable intangible assets. Goodwill is not amortized, but rather tested annually for impairment, or more frequently as events occur or circumstances change that would indicate the fair value is below the carrying amount. The Company may assess qualitative factors to determine whether it is more-likely-than-not the fair value is less than its carrying amount. If the Company concludes based on the qualitative assessment that goodwill may be impaired, a quantitative one-step impairment test would then be applied. An impairment loss would be recognized for any excess of carrying value over the fair value of the goodwill. Intangible assets subject to amortization are amortized over the estimated life, using a method that approximates the time the economic benefits are realized by the Company. Intangible assets are reviewed for impairment at least annually and whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Amortization expense on intangible assets was $13 million and $15 million for the years ended December 31, 2020 and December 31, 2019, respectively. The estimated future aggregate amortization expense on intangible assets for the years ended 2021, 2022, and 2023 is $11 million, $9 million and $7 million, respectively. Mortgage Servicing R ights We purchase and originate mortgage loans for sale to the secondary market and sell the loans on either a servicing-retained or servicing-released basis. If we retain the right to service the loan, an MSR is created at the time of sale which is recorded at fair value. We use an internal valuation model that utilizes an option-adjusted spread, constant prepayment speeds, costs to service and other assumptions to determine the fair value of MSRs. Management obtains third-party valuations of the MSR portfolio on a quarterly basis from independent valuation services to assess the reasonableness of the fair value calculated by our internal valuation model. Changes in the fair value of our MSRs are reported on the Consolidated Statements of Operations in net return on mortgage servicing. For further information, see Note 10 - Mortgage Servicing Rights and Note 20 - Fair Value Measurements. We periodically enter into agreements to sell certain of our MSRs, which qualify as sales transactions. A transfer of servicing rights related to loans previously sold qualifies as a sale at the date on which title passes if substantially all risks and rewards of ownership have irrevocably passed to the transferee and any protection provisions retained by the transferor are minor and can be reasonably estimated. In addition, if a sale is recognized and only minor protection provisions exist, a liability is accrued for the estimated obligation associated with those provisions. Leases Effective January 1, 2019, we adopted the requirements of ASU 2016-02, Leases (Topic 842) and all related amendments. The Company elected to apply the practical expedient of forgoing the restatement of comparative periods. In addition, we elected the practical expedients permitted under transition guidance to not reassess leases entered into prior to adoption. As permitted under ASC 842, the Company made an accounting policy election to exempt leases with an initial term of twelve months or less from balance sheet recognition. Instead, short-term leases are expensed over the lease term with no impact to the balance sheet. At December 31, 2019, our inventory of leases included various bank branches, ATM locations and retail home lending offices. Many of our leases contain options to extend or terminate early and we consider these options when evaluating the lease term to determine if they are reasonably certain to be exercised based on all relevant economic and financial factors. Lease rental expense totaled approximately $13 million, $12 million and $11 million for the years ended December 31, 2020, 2019 and 2018, respectively. All leases are classified as operating leases based on their terms. The following table reflects information relating to our operating leases: December 31, 2020 (Dollars in millions) Operating Leases (1) Weighted-average remaining lease term (years) 3.64 Weighted-average discount rate 1.85 % Right-of-use asset (2) $ 23 Lease liability (3) $ 23 (1) Lease expense on operating leases includes a de-minimis amount of short-term lease expense and variable lease expense. (2) Recorded in premises and equipment on the Consolidated Statements of Financial Condition. (3) Recorded in other liabilities The following table presents our undiscounted cash flows on our operating lease liabilities as of December 31, 2020 and our minimum contractual obligations on our operating leases as of December 31, 2019: December 31, 2020 December 31, 2019 (Dollars in millions) Within one year $ 9 $ 9 After one year and within two years 8 7 After two years and within three years 5 5 After three years and within four years 3 3 After four years and within five years 2 1 After five years 1 2 Total (1) $ 28 $ 27 (1) The difference between the total undiscounted cash payments on operating leases and the lease liability is solely the effect of discounting. Servicing Fee Income Servicing fee income, late fees and ancillary fees received on loans for which we own the MSR are included in net return on mortgage servicing rights on the Consolidated Statements of Operations. The fees are based on the outstanding principal and are recorded as income when earned. Subservicing fees, which are included in loan administration income on the Consolidated Statements of Operations, are based on a contractual monthly amount per loan including late fees and other ancillary income. Revenue from Contracts with Customers Under the guidance of the Revenue from Contracts with Customers (Topic 606), an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration received in exchange for those goods or services. Revenue is recognized when obligations, under the terms of a contract with our customer, are satisfied, which generally occurs when services are performed. Revenue is measured as the amount of consideration we expect to receive in exchange for providing services. The disaggregation of our revenue from contracts with customers is provided below: For the Years Ended December 31, Location of Revenue (1) 2020 2019 (Dollars in millions) Deposit account and other banking income Deposit fees and charges $ 21 $ 27 Debit card interchange fees Deposit fees and charges 11 11 Credit card interchange fees Other noninterest income 1 2 Wealth management Other noninterest income 8 6 Total $ 41 $ 46 (1) Recognized within the Community Banking segment. Deposit account and other banking income - We charge depositors various deposit account service fees including those for outgoing wires, overdrafts, stop payments, and ATM fees. These fees are generated from a depositor’s option to purchase services offered under the contract and are only considered a contract when the depositor exercises their option to purchase these account services. Therefore, we deem the term of our contracts with depositors to be day-to-day and do not extend beyond the services already provided. Deposit account and other banking fees are recorded at the point in time we perform the requested service. Interchange income - We collect interchange fee income when debit cards that we have issued to our customers, are used in merchant transactions. Our performance obligation is satisfied and revenue is recognized at the point we initiate the payment of funds from a customer’s account to a merchant account. Merchant fee income - We receive a percentage of merchant fees based upon card transactions processed through point-of-sale terminals at referred merchant locations. Our performance obligation is satisfied when our referral of a merchant to a payment processing vendor results in an executed agreement between the merchant and the vendor. Merchant fee revenue is recognized as received. Wealth management revenue - We earn commission income through a revenue share program based on a tiered percentage of total gross commissions generated from the sales of investment and insurance services to Flagstar customers. Commissions are earned and our performance obligation has been satisfied at the point of sale or trade execution. Our portion of earned commissions is calculated, paid and recognized as revenue on a monthly basis. We also earn revenue from portfolio management services. We receive payment in advance for portfolio management services at the beginning of each quarter for services to be performed over the quarter which results an insignificant revenue liability. We recognize this revenue over the quarter on a straight-line basis, as we believe this is the most appropriate method to measure progress towards satisfaction of the performance obligation. Derivatives We utilize derivative instruments to manage the fair value changes in our MSRs, interest rate lock commitments and LHFS portfolio which are exposed to price and interest rate risk; facilitate asset/liability management; minimize the variability of future cash flows on long-term debt; and to meet the needs of our customers. All derivatives are recognized on the Consolidated Statements of Financial Condition as other assets and liabilities, as applicable, at their estimated fair value. For those derivatives desig

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The following table presents our investment securities: Amortized Cost Gross Unrealized Gross Unrealized Fair Value (Dollars in millions) December 31, 2020 Available-for-sale securities Agency - Commercial $ 1,018 $ 43 $ — $ 1,061 Agency - Residential 707 28 — 735 Corporate debt obligations 75 2 — 77 Municipal obligations 27 1 — 28 Other MBS 42 — — 42 Certificate of deposit 1 — — 1 Total available-for-sale securities (1) $ 1,870 $ 74 $ — $ 1,944 Held-to-maturity securities Agency - Commercial $ 193 $ 7 $ — $ 200 Agency - Residential 184 9 — 193 Total held-to-maturity securities (1) $ 377 $ 16 $ — $ 393 December 31, 2019 Available-for-sale securities Agency - Commercial $ 948 $ 2 $ (3) $ 947 Agency - Residential 1,015 4 (4) 1,015 Corporate debt obligations 76 1 — 77 Municipal obligations 31 — — 31 Other MBS 44 1 — 45 Certificate of deposit 1 — — 1 Total available-for-sale securities (1) $ 2,115 $ 8 $ (7) $ 2,116 Held-to-maturity securities Agency - Commercial $ 306 $ — $ (1) $ 305 Agency - Residential 292 3 (1) 294 Total held-to-maturity securities (1) $ 598 $ 3 $ (2) $ 599 (1) There were no securities of a single issuer, which are not governmental or government-sponsored, that exceeded 10 percent of stockholders’ equity at December 31, 2020 or December 31, 2019 . We evaluate our securities portfolio each quarter to determine if any security's value has declined below amortized cost for impairment (for further information on our policy for assessing impairment on our security portfolio, see Note 1 - Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies). We had no unrealized credit losses during the years ended December 31, 2020, 2019 and 2018. Available-for-sale securities We purchased $360 million of AFS securities, which were comprised of U.S. government sponsored agency MBS, certificates of deposit, and corporate debt obligations during the year ended December 31, 2020. We purchased $500 million of AFS securities, which included U.S. government sponsored agency MBS, corporate debt obligations and municipal obligations during the year ended December 31, 2019. We had no sales of AFS securities during the year ended December 31, 2020. During the year ended December 31, 2019, we sold $432 million of AFS securities, which resulted in a gain of $7 million. We had no sales of U.S. government sponsored agency securities during the year ended December 31, 2018. Held-to-maturity securities There were no purchases or sales of HTM securities during the years ended December 31, 2020, December 31, 2019 and December 31, 2018. The following table summarizes the unrealized loss positions on available-for-sale and held-to-maturity investment securities, by duration of the unrealized loss: Unrealized Loss Position with Duration Unrealized Loss Position with Duration Fair Number of Unrealized Fair Number of Unrealized (Dollars in millions) December 31, 2020 Available-for-sale securities Agency - Commercial $ 3 1 $ — $ 7 2 $ — Agency - Residential — — — — 1 — Corporate debt obligations — — — 10 3 — Other mortgage-backed securities — — — — 1 — Held-to-maturity securities Agency - Residential — — — 2 3 — December 31, 2019 Available-for-sale securities Agency - Commercial $ 148 17 $ (3) $ 303 19 $ — Agency - Residential 266 26 (3) 148 14 (1) Municipal obligations 8 3 — — — — Held-to-maturity securities Agency - Commercial $ 148 13 $ (1) $ 85 6 $ — Agency - Residential 35 7 (1) 38 10 — Unrealized losses on available-for-sale securities have not been recognized into income because almost all of the portfolio held by us are issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies, and have a long history of no credit losses. The remaining unrealized losses on available-for-sale securities are municipal securities and corporate debt obligations, all of which are considered investment grade or are de minimis. The fair value is expected to recover as the bonds approach maturity. The following table shows the amortized cost and estimated fair value of securities by contractual maturity: Investment Securities Available-for-Sale Investment Securities Held-to-Maturity Amortized Fair Weighted-Average Amortized Fair Weighted-Average (Dollars in millions) December 31, 2020 Due in one year or less $ 5 $ 5 2.22 % $ — $ — — % Due after one year through five years 9 10 2.83 % 7 8 2.44 % Due after five years through 10 years 123 127 3.95 % 7 8 2.37 % Due after 10 years 1,733 1,802 2.34 % 363 377 2.41 % Total $ 1,870 $ 1,944 $ 377 $ 393 (1) Weighted-average yields are based on amortized cost weighted for the contractual maturity of each security.

Loans Held-for-Sale

Loans Held-for-Sale	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Loans Held-for-Sale	Loans Held-for-Sale The majority of our mortgage loans originated as LHFS are ultimately sold into the secondary market on a whole loan basis or by securitizing the loans into agency, government, or private label mortgage-backed securities. At December 31, 2020 and 2019, LHFS totaled $7.1 billion and $5.3 billion, respectively. For the years ended December 31, 2020, 2019 and 2018, we had net gains on loan sales associated with LHFS of $969 million, $333 million, and $197 million, respectively. At December 31, 2020 and 2019, $31 million and $39 million, respectively, of LHFS were recorded at lower of cost or fair value. We elected the fair value option for the remainder of the loans in the portfolio.

Loans Held-for-Investment

Loans Held-for-Investment	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Loans Held-for-Investment	750 $ 195 $ 272 $ 118 $ 193 $ 181 $ 231 $ 55 $ 6 $ 1,251 700-750 119 180 90 85 64 130 25 7 700 <700 48 96 29 14 7 91 13 2 300 Home Equity >750 2 9 6 2 1 7 324 13 364 700-750 3 12 4 3 1 8 289 20 340 <700 2 10 3 1 — 8 110 16 150 Other Consumer >750 209 205 80 2 1 5 213 6 721 700-750 79 107 55 1 — 1 9 — 252 <700 5 10 11 — — — 5 — 31 Total Consumer Loans (1) $ 662 $ 901 $ 396 $ 301 $ 255 $ 481 $ 1,043 $ 70 $ 4,109 (1) Excludes loans carried under the fair value option. Loan-to-value ratios primarily impact the allowance on mortgages within the consumer loan portfolio. The following table presents the amortized cost in residential first mortgages and home equity based on loan-to-value ratios: Revolving Loans Converted to Term Loans Amortized Cost Basis LTV Band Revolving Loans Amortized Cost Basis Total Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Consumer Loans (Dollars in millions) Residential first mortgage >90 $ 84 $ 260 $ 123 $ 35 $ 3 $ 19 $ — $ — $ 524 71-90 169 180 66 99 72 238 — — 824 55-70 83 60 22 82 96 122 — — 465 <55 26 48 26 76 81 73 93 15 438 Home Equity >90 — — — 1 1 10 — — 12 71-90 5 24 10 4 1 9 548 33 634 <=70 2 7 3 1 — 4 175 16 208 Total (1) $ 369 $ 579 $ 250 $ 298 $ 254 $ 475 $ 816 $ 64 $ 3,105 (1) Excludes loans carried under the fair value option. Commercial Loans Risk rating and the average loan duration have the most significant impact on the ACL for commercial loans. Additional factors which impact the ACL are debt-service-coverage ratio, loan-to-value ratio, interest-coverage ratio and leverage ratio. Internal audit conducts periodic examinations which serve as an independent verification of the accuracy of the ratings assigned. All loans are examined on at least an annual basis. Loan grades are based on different factors within the borrowing relationship: entity sales, debt service coverage, debt/total net worth, liquidity, balance sheet and income statement trends, management experience, business stability, financing structure and financial reporting requirements. The underlying collateral is also rated based on the specific type of collateral and corresponding LTV. The combination of the borrower and collateral risk ratings results in the final risk rating for the borrowing relationship. Based on the most recent credit analysis performed, the amortized cost basis, by risk category for each class of loans within the commercial portfolio, is as follows: Term Loans Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Total December 31, 2019 Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Commercial Loans (Dollars in million) Commercial real estate Pass $ 347 $ 993 $ 439 $ 438 $ 308 $ 280 $ — $ — $ 2,805 $ 2,794 Watch 21 19 35 51 21 19 — — 166 24 Special mention 5 1 16 — 17 14 — — 53 5 Substandard — 11 1 25 — — — — 37 5 Commercial and industrial Pass 319 425 163 149 54 71 19 — 1,200 1,533 Watch 3 48 28 25 — 2 — — 106 72 Special mention 1 — 14 9 — — — — 24 24 Substandard 22 11 15 4 — — — — 52 5 Warehouse Pass 7,398 — — — — — — — 7,398 2,556 Watch 260 — — — — — — — 260 189 Special mention — — — — — — — — — 15 Substandard — — — — — — — — — — Total commercial loans $ 8,376 $ 1,508 $ 711 $ 701 $ 400 $ 386 $ 19 $ — $ 12,101 $ 7,222 " id="sjs-B4" xml:space="preserve">Loans Held-for-Investment The following table presents our LHFI: December 31, 2020 December 31, 2019 (Dollars in millions) Consumer loans Residential first mortgage $ 2,266 $ 3,154 Home equity 856 1,024 Other 1,004 729 Total consumer loans 4,126 4,907 Commercial loans Commercial real estate 3,061 2,828 Commercial and industrial 1,382 1,634 Warehouse lending 7,658 2,760 Total commercial loans 12,101 7,222 Total loans held-for-investment $ 16,227 $ 12,129 The following table presents the UPB of our loan sales and purchases in the LHFI portfolio: For the Year Ended December 31, 2020 2019 2018 (Dollars in millions) Loans Sold (1) Performing loans $ 492 $ 217 $ 158 Total loans sold $ 492 $ 217 $ 158 Net gain associated with loan sales (2) $ 3 $ 2 $ 2 Loans Purchased Residential $ — $ — $ 3 Home equity — 249 — Other consumer (3) 63 51 34 Total loans purchased $ 63 $ 300 $ 37 Premium associated with loans purchased $ — $ 11 $ — (1) Upon a change in our intent, the loans were transferred to LHFS and subsequently sold. (2) Recorded in net gain on loan sales on the Consolidated Statement of Operations. (3) Does not include point of sale flow consumer loans. We have pledged certain LHFI, LHFS, and LGG to collateralize lines of credit and/or borrowings with the FRB of Chicago and the FHLB of Indianapolis. At December 31, 2020 and 2019, we pledged loans of $11.6 billion and $9.1 billion, respectively. As of December 31, 2020, we estimated losses over a two-year reasonable and supportable forecast period using macroeconomic scenarios before reverting economic variances over a one-year period to their long-term historical averages on a straight-line basis. As of December 31, 2020, we utilized the Moody's December scenarios in our forecast: a growth forecast, weighted at 30 percent; a baseline forecast, weighted at 40 percent; and an adverse forecast, weighted at 30 percent. The resulting composite forecast for the fourth quarter 2020 was slightly better than the composite forecast used in the third quarter 2020. Unemployment increases slightly in 2021 and begins recovering in 2022. GDP recovers slightly by the end of the year from current levels and does not return to near pre-COVID level until 2024. HPI decreases 1 percent from late 2020 through 2021. The following table presents changes in the allowance for loan losses, by class of loan: Residential Home Equity Other Commercial Commercial Warehouse Total (Dollars in millions) Year Ended December 31, 2020 Beginning balance, prior to adoption of ASC 326 $ 22 $ 14 $ 6 $ 38 $ 22 $ 5 $ 107 Impact of adopting ASC 326 25 12 10 (14) (6) (4) 23 Provision (benefit) 8 (2) 26 60 36 3 131 Charge-offs (6) (3) (5) — (1) — (15) Recoveries — 4 2 — — — 6 Ending allowance balance $ 49 $ 25 $ 39 $ 84 $ 51 $ 4 $ 252 Year Ended December 31, 2019 Beginning balance $ 38 $ 15 $ 3 $ 48 $ 18 $ 6 $ 128 Provision (benefit) (14) (1) 10 (10) 34 (1) 18 Charge-offs (3) (2) (7) — (31) — (43) Recoveries 1 2 — — 1 — 4 Ending allowance balance $ 22 $ 14 $ 6 $ 38 $ 22 $ 5 $ 107 Year Ended December 31, 2018 Beginning balance $ 47 $ 22 $ 1 $ 45 $ 19 $ 6 $ 140 Provision (benefit) (7) (6) 3 3 (1) — (8) Charge-offs (4) (2) (2) — — — (8) Recoveries 2 1 1 — — — 4 Ending allowance balance $ 38 $ 15 $ 3 $ 48 $ 18 $ 6 $ 128 (1) Includes LGG. The following table sets forth the LHFI aging analysis of past due and current loans (for further information on our policy for past due and impaired loans, see Note 1 - Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies): 30-59 Days 60-89 Days 90 Days or Total Current Total LHFI (3)(4)(5) (Dollars in millions) December 31, 2020 Consumer loans Residential first mortgage $ 4 $ 4 $ 31 $ 39 $ 2,227 $ 2,266 Home equity 1 1 5 7 849 856 Other 4 1 2 7 997 1,004 Total consumer loans 9 6 38 53 4,073 4,126 Commercial loans Commercial real estate 20 — 3 23 3,038 3,061 Commercial and industrial 1 — 15 16 1,366 1,382 Warehouse lending — — — — 7,658 7,658 Total commercial loans 21 — 18 39 12,062 12,101 Total loans (2) $ 30 $ 6 $ 56 $ 92 $ 16,135 $ 16,227 December 31, 2019 Consumer loans Residential first mortgage $ 5 $ 4 $ 21 $ 30 $ 3,124 $ 3,154 Home equity 1 — 4 5 1,019 1,024 Other 3 1 1 5 724 729 Total consumer loans 9 5 26 40 4,867 4,907 Commercial loans Commercial real estate — — — — 2,828 2,828 Commercial and industrial — — — — 1,634 1,634 Warehouse lending — — — — 2,760 2,760 Total commercial loans — — — — 7,222 7,222 Total loans (2) $ 9 $ 5 $ 26 $ 40 $ 12,089 $ 12,129 (1) Includes less than 90 days past due performing loans which are placed in nonaccrual. Interest is not being accrued on these loans. (2) Includes $8 million and $4 million of past due loans accounted for under the fair value option at December 31, 2020 and 2019, respectively. (3) Collateral dependent loans totaled $80 million at December 31, 2020 and $54 million at December 31, 2019, respectively. The majority of these loans are secured by real estate. (4) The interest income recognized on impaired loans was $2 million and less than $1 million at December 31, 2020 and December 31, 2019, respectively. (5) The delinquency status for loans in forbearance is frozen for loans at inception of the forbearance period and will resume when the borrower's forbearance period ends. Interest income is recognized on nonaccrual loans using a cash basis method. Interest that would have been accrued was $1 million in each of the years ended December 31, 2020, 2019 and 2018, respectively. At December 31, 2020 and 2019, we had no loans 90 days or greater past due and still accruing interest. Troubled Debt Restructurings We may modify certain loans in both our consumer and commercial loan portfolios to retain customers or to maximize collection of the outstanding loan balance. Troubled debt restructurings ("TDRs") are modified loans in which a borrower demonstrates financial difficulties and for which a concession has been granted as a result. Nonperforming TDRs are included in nonaccrual loans. TDRs remain in nonperforming status until a borrower has made payments and is current for at least six consecutive months. Performing TDRs are not considered to be nonaccrual so long as we believe that all contractual principal and interest due under the restructured terms will be collected. Performing and nonperforming TDRs remain impaired as interest and principal will not be received in accordance with the original contractual terms of the loan agreement. Refer to Note 1- Description of Business, Basis of Presentation, and Summary of Significant Accounting Standards for a description of the methodology used to determine TDRs. Some loan modifications classified as TDRs may not ultimately result in the full collection of principal and interest, as modified, but may give rise to potential incremental losses. We measure impairments using a discounted cash flow method for performing TDRs and measure impairment based on collateral values for nonperforming TDRs. Beginning in March 2020, as a response to COVID-19, we offered our consumer and commercial customers principal and interest payment deferrals and extensions. We considered these programs in the context of whether or not the short-term modifications of these loans would constitute a TDR. We considered the CARES Act, interagency guidance and related guidance from the FASB, which provided that short-term modifications made on a good faith basis in response to COVID-19 to borrowers who were current prior to any relief are not required to be accounted for as TDRs. As a result, we have determined that loan forbearance, modifications, deferrals and extensions made under these COVID-19 programs are not TDRs. The following table provides a summary of TDRs by type and performing status: TDRs Performing Nonperforming Total (Dollars in millions) December 31, 2020 Consumer loans Residential first mortgage $ 19 $ 8 $ 27 Home equity 12 2 14 Total consumer TDR loans 31 10 41 Commercial Loans Commercial real estate 5 — 5 Commercial and industrial — — — Total commercial TDR loans 5 — 5 Total TDRs (1)(2) $ 36 $ 10 $ 46 December 31, 2019 Consumer loans Residential first mortgage $ 20 $ 8 $ 28 Home equity 18 2 20 Total TDRs (1)(2) $ 38 $ 10 $ 48 (1) The ALLL on TDR loans totaled $5 million and $8 million at December 31, 2020 and 2019, respectively. (2) Includes $3 million and $2 million of TDR loans accounted for under the fair value option at December 31, 2020 and 2019, respectively. The following table provides a summary of newly modified TDRs: New TDRs Number of Accounts Pre-Modification Post-Modification Increase (Decrease) in Allowance at Modification (Dollars in millions) Year Ended December 31, 2020 Residential first mortgages 9 $ 2 $ 2 $ — Home equity (2)(3) 3 — — — Other consumer 1 — — $ — Commercial real estate 1 5 5 $ — Total TDR loans 14 $ 7 $ 7 $ — Year Ended December 31, 2019 Residential first mortgages 8 $ 1 $ 1 $ — Home equity (2)(3) 6 — — — Total TDR loans 14 $ 1 $ 1 $ — Year Ended December 31, 2018 Residential first mortgages 14 $ 3 $ 3 $ — Home equity (2)(3) 17 1 1 — Total TDR loans 31 $ 4 $ 4 $ — (1) Post-modification balances include past due amounts that are capitalized at modification date. (2) Home equity post-modification UPB reflects write downs. (3) Includes loans carried at fair value option. There were no loans modified in the previous 12 months that subsequently defaulted during the years ended December 31, 2020, 2019, and 2018. All TDR classes within the consumer and commercial loan portfolios are considered subsequently defaulted when they are greater than 90 days past due within 12 months of the restructuring date. Credit Quality We utilize a combination of internal and external risk rating systems which are applied to all consumer and commercial loans which are used as loan-level inputs to our ACL models. Descriptions of our risk ratings as they relate to credit quality follow the ratings used by the U.S. bank regulatory agencies as listed below. Pass. Pass assets are not impaired nor do they have any known deficiencies that could impact the quality of the asset. Watch. Watch assets are defined as pass-rated assets that exhibit elevated risk characteristics or other factors that deserve Management’s close attention and increased monitoring. However, the asset does not exhibit a potential or well-defined weakness that would warrant a downgrade to criticized or adverse classification. Special mention. Assets identified as special mention possess credit deficiencies or potential weaknesses deserving Management's close attention. Special mention assets have a potential weakness or pose an unwarranted financial risk that, if not corrected, could weaken the assets and increase risk in the future. Special mention assets are criticized, but do not expose an institution to sufficient risk to warrant adverse classification. Substandard . Assets identified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified must have a well-defined weakness or weaknesses that jeopardize the full collection or liquidation of the debt. Substandard assets are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected. For home equity loans and other consumer loans, we evaluate credit quality based on the aging and status of payment activity and any other known credit characteristics that call into question full repayment of the asset. Substandard loans may be placed on either accrual or nonaccrual status. Doubtful . An asset classified as doubtful has all the weaknesses inherent in one classified substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. A doubtful asset has a high probability of total or substantial loss, but because of specific pending events that may strengthen the asset, its classification as loss is deferred. Doubtful borrowers are usually in default, lack adequate liquidity or capital and lack the resources necessary to remain an operating entity. Pending events can include mergers, acquisitions, liquidations, capital injections, the perfection of liens on additional collateral, the valuation of collateral and refinancing. Generally, pending events should be resolved within a relatively short period and the ratings will be adjusted based on the new information. Due to the high probability of loss, doubtful assets are placed on nonaccrual. Loss. An asset classified as loss is considered uncollectible and of such little value that the continuance as a bankable asset is not warranted. This classification does not mean that an asset has absolutely no recovery or salvage value, rather that it is not practical or desirable to defer writing off the asset even though partial recovery may be affected in the future. Consumer Loans Consumer loans consist of open and closed-end loans extended to individuals for household, family, and other personal expenditures. Consumer loans includes other consumer product loans and loans to individuals secured by their personal residence, including first mortgage, home equity, and home improvement loans. Because consumer loans are usually relatively small-balance, homogeneous exposures, consumer loans are rated based primarily on payment performance. Payment performance is a proxy for the strength of repayment capacity and loans are generally classified based on their payment status rather than by an individual review of each loan. In accordance with regulatory guidance, we assign risk ratings to consumer loans in the following manner: • Consumer loans are classified as Watch once the loan becomes 60 days past due. • Open and closed-end consumer loans 90 days or more past due are classified as Substandard. Payment activity, credit rating and loan-to-value ratios have the most significant impact on the ACL for consumer loans. The following table presents the amortized cost in residential and consumer loans based on payment activity: Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Total December 31, 2019 Term Loans Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Consumer Loans (Dollars in millions) Residential First Mortgage Pass $ 362 $ 544 $ 231 $ 289 $ 252 $ 420 $ 92 $ 15 $ 2,205 $ 3,107 Watch — 1 1 1 — 17 1 — 21 23 Substandard — 3 5 2 — 15 — — 25 15 Home Equity Pass 7 31 13 6 2 11 720 48 838 1,002 Watch — — — — — 11 2 — 13 16 Substandard — — — — — 1 1 1 3 3 Other Consumer Pass 292 321 145 3 1 6 227 5 1,000 727 Watch — — — — — — — 1 1 1 Substandard 1 1 1 — — — — — 3 1 Total Consumer Loans (1)(2) $ 662 $ 901 $ 396 $ 301 $ 255 $ 481 $ 1,043 $ 70 $ 4,109 $ 4,895 (1) Excludes loans carried under the fair value option. (2) The delinquency status for loans in forbearance are frozen for loans at inception of the forbearance period and will resume when the borrower's forbearance period ends. The following table presents the amortized cost in residential and consumer loans based on credit scores: Revolving Loans Converted to Term Loans Amortized Cost Basis FICO Band Revolving Loans Amortized Cost Basis Total Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Consumer Loans (Dollars in millions) Residential First Mortgage >750 $ 195 $ 272 $ 118 $ 193 $ 181 $ 231 $ 55 $ 6 $ 1,251 700-750 119 180 90 85 64 130 25 7 700 <700 48 96 29 14 7 91 13 2 300 Home Equity >750 2 9 6 2 1 7 324 13 364 700-750 3 12 4 3 1 8 289 20 340 <700 2 10 3 1 — 8 110 16 150 Other Consumer >750 209 205 80 2 1 5 213 6 721 700-750 79 107 55 1 — 1 9 — 252 <700 5 10 11 — — — 5 — 31 Total Consumer Loans (1) $ 662 $ 901 $ 396 $ 301 $ 255 $ 481 $ 1,043 $ 70 $ 4,109 (1) Excludes loans carried under the fair value option. Loan-to-value ratios primarily impact the allowance on mortgages within the consumer loan portfolio. The following table presents the amortized cost in residential first mortgages and home equity based on loan-to-value ratios: Revolving Loans Converted to Term Loans Amortized Cost Basis LTV Band Revolving Loans Amortized Cost Basis Total Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Consumer Loans (Dollars in millions) Residential first mortgage >90 $ 84 $ 260 $ 123 $ 35 $ 3 $ 19 $ — $ — $ 524 71-90 169 180 66 99 72 238 — — 824 55-70 83 60 22 82 96 122 — — 465 <55 26 48 26 76 81 73 93 15 438 Home Equity >90 — — — 1 1 10 — — 12 71-90 5 24 10 4 1 9 548 33 634 <=70 2 7 3 1 — 4 175 16 208 Total (1) $ 369 $ 579 $ 250 $ 298 $ 254 $ 475 $ 816 $ 64 $ 3,105 (1) Excludes loans carried under the fair value option. Commercial Loans Risk rating and the average loan duration have the most significant impact on the ACL for commercial loans. Additional factors which impact the ACL are debt-service-coverage ratio, loan-to-value ratio, interest-coverage ratio and leverage ratio. Internal audit conducts periodic examinations which serve as an independent verification of the accuracy of the ratings assigned. All loans are examined on at least an annual basis. Loan grades are based on different factors within the borrowing relationship: entity sales, debt service coverage, debt/total net worth, liquidity, balance sheet and income statement trends, management experience, business stability, financing structure and financial reporting requirements. The underlying collateral is also rated based on the specific type of collateral and corresponding LTV. The combination of the borrower and collateral risk ratings results in the final risk rating for the borrowing relationship. Based on the most recent credit analysis performed, the amortized cost basis, by risk category for each class of loans within the commercial portfolio, is as follows: Term Loans Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Total December 31, 2019 Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Commercial Loans (Dollars in million) Commercial real estate Pass $ 347 $ 993 $ 439 $ 438 $ 308 $ 280 $ — $ — $ 2,805 $ 2,794 Watch 21 19 35 51 21 19 — — 166 24 Special mention 5 1 16 — 17 14 — — 53 5 Substandard — 11 1 25 — — — — 37 5 Commercial and industrial Pass 319 425 163 149 54 71 19 — 1,200 1,533 Watch 3 48 28 25 — 2 — — 106 72 Special mention 1 — 14 9 — — — — 24 24 Substandard 22 11 15 4 — — — — 52 5 Warehouse Pass 7,398 — — — — — — — 7,398 2,556 Watch 260 — — — — — — — 260 189 Special mention — — — — — — — — — 15 Substandard — — — — — — — — — — Total commercial loans $ 8,376 $ 1,508 $ 711 $ 701 $ 400 $ 386 $ 19 $ — $ 12,101 $ 7,222

Loans with Government Guarantee

Loans with Government Guarantees	12 Months Ended
	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Abstract]
Loans with Government Guarantees	Loans with Government Guarantees Substantially all LGG are insured or guaranteed by the FHA or U.S. Department of Veterans Affairs. FHA loans earn interest at a rate based upon the 10-year U.S. Treasury note rate at the time the underlying loan becomes delinquent, which is not paid by the FHA or the U.S. Department of Veterans Affairs until claimed. Certain loans within our portfolio may be subject to indemnifications and insurance limits which expose us to limited credit risk. We have reserved for these risks within other assets and as a component of our ACL on residential first mortgages. At December 31, 2020 and December 31, 2019, respectively, LGG totaled $2.5 billion and $736 million. We originate government guaranteed loans which are pooled and sold as Ginnie Mae MBS. Pursuant to Ginnie Mae servicing guidelines, we have the unilateral right to repurchase loans securitized in Ginnie Mae pools that are due, but unpaid, for three consecutive months (typically referred to as 90 days past due). As a result, once the delinquency criteria have been met, regardless of whether the repurchase option has been exercised, the loan is required to be re-recognized on the balance sheet by the MSR owner. These loans are recorded in loans with government guarantees and the liability to repurchase the loans is recorded as loans with government guarantees repurchase options on the Consolidated Statements of Financial Condition. This resulted in $1.9 billion of repurchase options as of December 31, 2020, a $1.8 billion increase from December 31, 2019. Repossessed assets and the associated claims related to government guaranteed loans are recorded in other assets and totaled $17 million and $45 million at December 31, 2020 and December 31, 2019, respectively.

Repossessed Assets

Repossessed Assets	12 Months Ended
	Dec. 31, 2020
Repossessed Assets [Abstract]
Repossessed Assets	Repossessed Assets Repossessed assets include the following: December 31, 2020 2019 (Dollars in millions) One-to-four family properties $ 4 $ 6 Commercial properties 4 4 Total repossessed assets $ 8 $ 10 The following schedule provides the activity for repossessed assets: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Beginning balance $ 10 $ 7 $ 8 Additions, net 8 12 10 Disposals (7) (4) (8) Net write down on disposal (3) (5) (3) Ending balance $ 8 $ 10 $ 7

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2020
Disclosure of Transfer of Securitizations or Asset-backed Financing Financial Assets Accounted for as Sale [Abstract]
Variable Interest Entities	Variable Interest Entities    We have no consolidated VIEs as of December 31, 2020 and December 31, 2019.     In connection with our securitization activities, we have retained a five percent interest in the investment securities of certain trusts ("other MBS") and are contracted as the subservicer of the underlying loans, compensated based on market rates, which constitutes a continuing involvement in these trusts. Although we have a variable interest in these securitization trusts, we are not their primary beneficiary due to the relative size of our investment in comparison to the total amount of securities issued by the VIE and our inability to direct activities that most significantly impact the VIE’s economic performance. As a result, we have not consolidated the assets and liabilities of the VIE in our Consolidated Statements of Financial Condition. The Bank’s maximum exposure to loss is limited to our investment in the VIE as well as the standard representations and warranties made in conjunction with the loan transfer. For additional information, see Note 2 - Investment Securities and Note 20 - Fair Value Measurements.

Federal Home Loan Bank Stock

Federal Home Loan Bank Stock	12 Months Ended
	Dec. 31, 2020
Federal Home Loan Bank Stock [Abstract]
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock    Our investment in FHLB stock was $377 million and $303 million at December 31, 2020 and December 31, 2019, respectively. As a member of the FHLB, we are required to hold shares of FHLB stock in an amount equal to at least one percent of the aggregate UPB of our mortgage loans, home purchase contracts and similar obligations at the beginning of each year or 4.5 percent of our total FHLB advances, whichever is greater. We had $74 million of required purchases and no redemptions of FHLB stock during the years ended December 31, 2020. There were no required purchases or redemptions of FHLB stock during the year ended December 31, 2019. Dividends received on the stock equaled $12 million, $16 million and $15 million for the years ended December 31, 2020, 2019 and 2018, respectively. These dividends were recorded in the Consolidated Statements of Operations as other noninterest income.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment The following presents our premises and equipment balances and estimated useful lives: Estimated December 31, 2020 2019 (Dollars in millions) Land N/A $ 68 $ 73 Computer hardware and software 3 - 7 years 410 372 Office buildings and improvements 15 - 31.5 years 195 191 Furniture, fixtures and equipment 5 - 10 years 66 68 Leased equipment 3 - 10 years 19 36 Leasehold improvements 5 - 10 years 10 9 Fixed assets in progress (1) N/A 43 40 Right-of-use asset N/A 23 22 Total 834 811 Less: accumulated depreciation (442) (395) Premises and equipment, net $ 392 $ 416 (1) Consists primarily of internally developed software and software upgrades which have not yet been placed in service. Depreciation expense was $64 million, $59 million and $50 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Mortgage Servicing Rights

Mortgage Servicing Rights	12 Months Ended
	Dec. 31, 2020
Transfers and Servicing [Abstract]
Mortgage Servicing Rights	Mortgage Servicing Rights We have investments in MSRs that result from the sale of loans to the secondary market for which we retain the servicing. We account for MSRs at their fair value. A primary risk associated with MSRs is the potential reduction in fair value as a result of higher than anticipated prepayments due to loan refinancing prompted, in part, by declining interest rates or government intervention. Conversely, these assets generally increase in value in a rising interest rate environment to the extent that prepayments are slower than anticipated. We utilize derivatives as economic hedges to offset changes in the fair value of the MSRs resulting from the actual or anticipated changes in prepayments stemming from changing interest rate environments. There is also a risk of valuation decline due to higher than expected default rates, which we do not believe can be effectively managed using derivatives. For further information regarding the derivative instruments utilized to manage our MSR risks, see Note 11 - Derivative Financial Instruments. Changes in the fair value of residential first mortgage MSRs were as follows: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Balance at beginning of period $ 291 $ 290 $ 291 Additions from loans sold with servicing retained 268 223 356 Reductions from sales (71) (57) (339) Decrease in MSR fair value due to pay-offs, pay-downs, run-off, model changes, and other (1) (109) (89) (20) Changes in estimates of fair value due to interest rate risk (1) (2) (50) (76) 2 Fair value of MSRs at end of period $ 329 $ 291 $ 290 (1) Changes in fair value are included within net return on mortgage servicing rights on the Consolidated Statements of Operations. (2) Represents estimated MSR value change resulting primarily from market-driven changes which we manage through the use of derivatives. The following table summarizes the hypothetical effect on the fair value of servicing rights using adverse changes of 10 percent and 20 percent to the weighted average of certain significant assumptions used in valuing these assets: December 31, 2020 December 31, 2019 Fair value Fair value Actual 10% adverse change 20% adverse change Actual 10% adverse change 20% adverse change (Dollars in millions) Option adjusted spread 7.98 % $ 321 $ 313 5.34 % $ 284 $ 280 Constant prepayment rate 10.53 % 305 283 10.59 % 271 257 Weighted average cost to service per loan $ 81.24 325 321 $ 84.41 285 282 The sensitivity calculations above are hypothetical and should not be considered to be predictive of future performance. Changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the change in assumption to the change in fair value may not be linear. To isolate the effect of the specified change, the fair value shock analysis is consistent with the identified adverse change, while holding all other assumptions constant. In practice, a change in one assumption generally impacts other assumptions, which may either magnify or counteract the effect of the change. For further information on the fair value of MSRs, see Note 1 - Description of Business, Basis of Presentation, and Summary of Significant Accounting Standards and Note 20 - Fair Value Measurements. Contractual servicing and subservicing fees . Contractual servicing and subservicing fees, including late fees and other ancillary income are presented below. Contractual servicing fees are included within net return on mortgage servicing rights on the Consolidated Statements of Operations. Contractual subservicing fees including late fees and other ancillary income are included within loan administration income on the Consolidated Statements of Operations. Subservicing fee income is recorded for fees earned on subserviced loans, net of third-party subservicing costs. The following table summarizes income and fees associated with owned MSRs: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Net return on mortgage servicing rights Servicing fees, ancillary income and late fees (1) $ 107 $ 96 $ 65 Decrease in MSR fair value due to pay-offs, pay-downs, run-off, model changes and other (109) (89) (20) Changes in fair value due to interest rate risk (50) (76) 2 Gain (loss) on MSR derivatives (2) 65 76 (5) Net transaction costs (3) (1) (6) Total return (loss) included in net return on mortgage servicing rights $ 10 $ 6 $ 36 (1) Servicing fees are recorded on an accrual basis. Ancillary income and late fees are recorded on a cash basis. (2) Changes in the derivatives utilized as economic hedges to offset changes in fair value of the MSRs. The following table summarizes income and fees associated with our mortgage loans subserviced for others: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Loan administration income on mortgage loans subserviced Servicing fees, ancillary income and late fees (1) $ 126 $ 106 $ 54 Charges on subserviced custodial balances (2) (29) (67) (29) Other servicing charges (13) (9) (2) Total income on mortgage loans subserviced, included in loan administration $ 84 $ 30 $ 23 (1) Servicing fees are recorded on an accrual basis. Ancillary income and late fees are recorded on a cash basis.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Derivative financial instruments are recorded at fair value in other assets and other liabilities on the Consolidated Statements of Financial Condition. Our policy is to present our derivative assets and derivative liabilities on the Consolidated Statement of Financial Condition on a gross basis, even when provisions allowing for set-off are in place. However, for derivative contracts cleared through certain central clearing parties, variation margin payments are recognized as settlements. We are exposed to non-performance risk by the counterparties to our various derivative financial instruments. A majority of our derivatives are centrally cleared through a Central Counterparty Clearing House or consist of residential mortgage interest rate lock commitments further limiting our exposure to non-performance risk. We believe that the non-performance risk inherent in our remaining derivative contracts is minimal based on credit standards and the collateral provisions of the derivative agreements. Derivatives not designated as hedging instruments. We maintain a derivative portfolio of interest rate swaps, futures and forward commitments used to manage exposure to changes in interest rates and MSR asset values and to meet the needs of customers. We also enter into interest rate lock commitments, which are commitments to originate mortgage loans whereby the interest rate on the loan is determined prior to funding and the customers have locked into that interest rate. Market risk on interest rate lock commitments and mortgage LHFS is managed using corresponding forward sale commitments. Changes in the fair value of derivatives not designated as hedging instruments are recognized on the Consolidated Statements of Operations. Derivatives designated as hedging instruments. We have designated certain interest rate swaps as fair value hedges of investment securities available for sale and residential first mortgage loans held for investment using the last-of-layer method. Cash flows and the profit impact associated with designated hedges are reported in the same category as the underlying hedged item. We have also designated certain interest rate swaps as cash flow hedges on LIBOR-based variable interest payments on certain custodial deposits. Changes in the fair value of derivatives designated as cash flow hedges are recorded in other comprehensive income on the Consolidated Statement of Financial Condition and reclassified into interest expense in the same period in which the hedge transaction is recognized in earnings. At December 31, 2020, we had $5 million (net-of-tax) of unrealized losses on derivatives classified as cash flow hedges recorded in accumulated other comprehensive income. We had no designated cash flow hedges at December 31, 2019. The estimated amount to be reclassified from other comprehensive income into earnings during the next 12 months represents $3 million of losses (net-of-tax). Derivatives that are designated in hedging relationships are assessed for effectiveness using regression analysis at inception and qualitatively thereafter, unless regression analysis is deemed necessary. All designated hedge relationships were, and are expected to be, highly effective as of December 31, 2020. The following tables present the notional amount, estimated fair value and maturity of our derivative financial instruments: December 31, 2020 (1) Notional Amount Fair Value (2) Expiration Dates (Dollars in millions) Derivatives in cash flow hedge relationships Liabilities Interest rate swaps on custodial deposits $ 800 $ 1 2026-2027 Derivatives in fair value hedge relationships Liabilities Interest rate swaps on HFI residential first mortgages 100 — 2024 Interest rate swaps on AFS securities 450 — 2022-2025 Total hedge accounting swaps $ 1,350 $ 1 Derivatives not designated as hedging instruments Assets Futures $ 1,346 $ — 2021-2023 Mortgage-backed securities forwards 749 14 2021 Rate lock commitments 10,587 208 2021 Interest rate swaps and swaptions 1,481 59 2021-2051 Total derivative assets $ 14,163 $ 281 Liabilities Mortgage-backed securities forwards $ 11,194 $ 98 2021 Rate lock commitments 115 — 2021 Interest rate swaps and swaptions 1,305 4 2021-2030 Total derivative liabilities $ 12,614 $ 102 (1) Variation margin pledged to, or received from, a Central Counterparty Clearing House to cover the prior day's fair value of open positions is considered settlement of the derivative position for accounting purposes. (2) Derivative assets and liabilities are included in other assets and other liabilities on the Consolidated Statements of Financial Condition, respectively. December 31, 2019 (1) Notional Amount Fair Value (2) Expiration Dates (Dollars in millions) Derivatives in fair value hedge relationships Assets Interest rate swaps on FHLB advances $ 200 $ — 2020 Interest rate swaps on AFS securities 100 — 2022 Total derivative assets $ 300 $ — Derivatives not designated as hedging instruments Assets Futures $ 550 $ — 2020-2023 Mortgage-backed securities forwards 1,918 2 2020 Rate lock commitments 3,870 34 2020 Interest rate swaps 799 26 2020-2029 Total derivative assets $ 7,137 $ 62 Liabilities Mortgage-backed securities forwards $ 5,749 $ 9 2020 Rate lock commitments 229 1 2020 Interest rate swaps and swaptions 1,662 8 2020-2050 Total derivative liabilities $ 7,640 $ 18 (1) Variation margin pledged to, or received from, a Central Counterparty Clearing House to cover the prior day's fair value of open positions is considered settlement of the derivative position for accounting purposes. (2) Derivative assets and liabilities are included in other assets and other liabilities on the Consolidated Statements of Financial Condition, respectively. The following tables present the derivatives subject to a master netting arrangement, including the cash pledged as collateral: Gross Amounts Netted in the Statements of Financial Position Net Amount Presented in the Statements of Financial Position Gross Amounts Not Offset in the Statements of Financial Position Gross Amount Financial Instruments Cash Collateral (Dollars in millions) December 31, 2020 Derivatives designated as hedging instruments Liabilities Interest rate swaps on AFS securities $ — $ — $ — $ — $ 5 Interest rate swaps on HFI residential first mortgages — — — — 1 Interest rate swaps on custodial deposits 1 — 1 — 8 Total derivative liabilities $ 1 $ — $ 1 $ — $ 14 Derivatives not designated as hedging instruments Assets Mortgage-backed securities forwards $ 14 $ — $ 14 $ — $ — Interest rate swaps 59 — 59 — 6 Total derivative assets $ 73 $ — $ 73 $ — $ 6 Liabilities Mortgage-backed securities forwards $ 98 $ — $ 98 $ — $ 68 Interest rate swaps and swaptions (1) 4 — 4 — 26 Total derivative liabilities $ 102 $ — $ 102 $ — $ 94 December 31, 2019 Derivatives not designated as hedging instruments Assets Mortgage-backed securities forwards $ 2 $ — $ 2 $ — $ — Interest rate swaps 26 — 26 — — Total derivative assets $ 28 $ — $ 28 $ — $ — Liabilities Mortgage-backed securities forwards $ 9 $ — $ 9 $ — $ 24 Interest rate swaps and swaptions (1) 8 — 8 — 39 Total derivative liabilities $ 17 $ — $ 17 $ — $ 63 (1) Variation margin pledged to, or received from, a Central Counterparty Clearing House to cover the prior days fair value of open positions is considered settlement of the derivative position for accounting purposes. Losses of $2 million on fair value hedging relationships of AFS securities were recorded in interest income for the year ended December 31, 2020. The income impact for fair value hedging relationships of AFS securities for the year ended December 31, 2019 was de-minimis. Losses of $2 million on cash flow hedging relationships of custodial deposits were reclassified from AOCI into loan administration income during the year ended December 31, 2020. There were no gains or losses on cash flow hedging relationships of custodial deposits for the year ended December 31, 2019. Gains and losses on fair value hedging relationships of HFI residential first mortgages for the year ended December 31, 2020 were de-minimis. The fair value basis adjustment on our hedged AFS securities is included in investment securities available for sale on our Consolidated Statements of Financial Condition. The carrying amount of our hedged securities was $1,680 million at December 31, 2020 and $287 million at December 31, 2019, of which $6 million and $1 million, respectively, were due to the fair value hedge relationship. The closed portfolio of AFS securities designated in this last layer method hedge was $1,615 million par (amortized cost of $1,612 million) at December 31, 2020 and $291 million par (amortized cost of $289 million) at December 31, 2019, of which we have designated $450 million and $100 million at December 31, 2020 and December 31, 2019, respectively. The carrying amount of hedged FHLB advances was $200 million at December 31, 2019. There were no hedged FHLB advances as of December 31, 2020. The fair value hedge relationship had a de minimis impact at December 31, 2020 and December 31, 2019. The fair value basis adjustment on our hedged fair HFI residential first mortgages is included in LHFI on our Consolidated Statements of Financial Condition. The carrying amount of our hedged loans was $240 million at December 31, 2020, of which $1 million was due to the fair value hedge relationship. We have designated $100 million of this closed portfolio of loans in a hedging relationship as of December 31, 2020. There were no hedged HFI residential first mortgages at December 31, 2019. At December 31, 2020, we pledged a total of $114 million related to derivative financial instruments, consisting of $84 million of cash collateral on derivative liabilities and $30 million of maintenance margin on centrally cleared derivatives and had a de minimis obligation to return cash on derivative assets. We pledged a total of $63 million related to derivative financial instruments, consisting of $34 million of cash collateral on derivatives and $29 million of maintenance margin on centrally cleared derivatives and had a de minimis obligation to return cash on derivative assets at December 31, 2019. Within the Consolidated Statements of Financial Condition, the collateral related to derivative activity is included in other assets and other liabilities and the cash pledged as maintenance margin is restricted and included in other assets. The following table presents the net gain (loss) recognized in income on derivative instruments, net of the impact of offsetting positions: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Derivatives not designated as hedging instruments Location of Gain (Loss) Futures Net return on mortgage servicing rights $ 1 $ (2) $ (4) Interest rate swaps and swaptions Net return on mortgage servicing rights 28 57 1 Mortgage-backed securities forwards Net return on mortgage servicing rights 36 21 (2) Rate lock commitments and MSR forwards Net gain on loan sales 86 35 (31) Forward commitments Other noninterest income — 2 — Interest rate swaps (1) Other noninterest income 3 5 3 Total derivative (loss) gain $ 154 $ 118 $ (33) (1) Includes customer-initiated commercial interest rate swaps.

Deposit Accounts

Deposit Accounts	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Deposit Accounts	Deposit Accounts The deposit accounts are as follows: December 31, 2020 2019 (Dollars in millions) Retail deposits Branch retail deposits Savings accounts $ 3,437 $ 3,030 Demand deposit accounts 1,726 1,318 Certificates of deposit/CDARS 1,355 2,353 Money market demand accounts 490 495 Total branch retail deposits 7,008 7,196 Commercial deposits (1) Demand deposit accounts 2,294 1,438 Savings accounts 461 342 Money market demand accounts 208 188 Total commercial retail deposits 2,963 1,968 Total retail deposits 9,971 9,164 Government deposits Savings accounts 778 495 Demand deposit accounts 529 360 Certificates of deposit/CDARS 458 358 Total government deposits (2) 1,765 1,213 Wholesale deposits 1,031 633 Custodial deposits (3) 7,206 4,136 Total deposits $ 19,973 $ 15,146 (1) Includes deposits from commercial and business banking customers. (2) Government deposits include funds from municipalities and schools. (3) Accounts represent a portion of the investor custodial accounts and escrows controlled by us in connection with loans serviced or subserviced for others and that have been placed on deposit with the Bank. The following indicates the scheduled maturities for certificates of deposit with a minimum denomination of $250,000: December 31, 2020 2019 (Dollars in millions) Three months or less $ 220 $ 223 Over three months to six months 220 238 Over six months to twelve months 153 278 One to two years 71 101 Thereafter 19 35 Total $ 683 $ 875

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Borrowings	Borrowings Federal Home Loan Bank Advances and Other Borrowings The following is a breakdown of our FHLB advances and other borrowings outstanding: December 31, 2020 December 31, 2019 Amount Rate Amount Rate (Dollars in millions) Short-term fixed rate term advances $ 3,415 0.20 % $ 3,695 1.61 % Other short-term borrowings 485 0.08 % 470 1.64 % Total short-term Federal Home Loan Bank advances and other borrowings 3,900 4,165 Long-term fixed rate advances 1,200 1.03 % 650 1.45 % Total long-term Federal Home Loan Bank advances 1,200 650 Total Federal Home Loan Bank advances and other borrowings $ 5,100 $ 4,815 The following table contains detailed information on our FHLB advances and other borrowings: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Maximum outstanding at any month end $ 6,841 $ 5,005 $ 5,740 Average outstanding balance 3,873 3,064 4,713 Average remaining borrowing capacity 5,282 4,194 2,089 Weighted average interest rate 0.72 % 1.90 % 1.96 % The following table outlines the maturity dates of our FHLB advances and other borrowings: December 31, 2020 (Dollars in millions) 2021 $ 3,900 2022 200 2023 500 2024 100 Thereafter 400 Total $ 5,100 Parent Company Senior Notes, Subordinated Notes and Trust Preferred Securities The following table presents long-term debt, net of debt issuance costs: December 31, 2020 December 31, 2019 Amount Interest Rate Amount Interest Rate (Dollars in millions) Senior Notes Senior notes, matures 2021 $ 246 6.125 % $ 249 6.125% Subordinated Notes Notes, matures 2030 148 4.125 % — — % Trust Preferred Securities Floating Three Month LIBOR Plus: Plus 3.25%, matures 2032 26 3.50 % 26 5.20 % Plus 3.25%, matures 2033 26 3.49 % 26 5.24 % Plus 3.25%, matures 2033 26 3.49 % 26 5.21 % Plus 2.00%, matures 2035 26 2.24 % 26 3.99 % Plus 2.00%, matures 2035 26 2.24 % 26 3.99 % Plus 1.75%, matures 2035 51 1.97 % 51 3.64 % Plus 1.50%, matures 2035 25 1.74 % 25 3.49 % Plus 1.45%, matures 2037 25 1.67 % 25 3.34 % Plus 2.50%, matures 2037 16 2.72 % 16 4.39 % Total Trust Preferred Securities 247 247 Total other long-term debt $ 641 $ 496 Senior Notes On July 11, 2016, we issued $250 million of senior notes ("Senior Notes"). Prior to June 15, 2021, we may redeem some or all of the Senior Notes at a redemption price equal to the greater of 100 percent of the aggregate principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments discounted to the redemption date on a semi-annual basis using a discount rate equal to the Treasury Rate plus 0.50 percent, in addition to accrued and unpaid interest. These notes were scheduled to mature on July 15, 2021, but we provided notice that we would be redeeming these outstanding notes on December 23, 2020. We accrued for the liabilities associated with that redemption as of December 31, 2020, and settled the Senior Notes on January 22, 2021. Subordinated Notes On October 28, 2020, we issued $150 million of Subordinated Debt (the "Notes") with a maturity date of November 1, 2030. The Notes bear interest at a fixed rate of 4.125 percent through October 31, 2025, and a variable rate tied to SOFR thereafter until maturity. We have the option to redeem all or a part of the Notes beginning on November 1, 2025, and on any subsequent interest payment date. The Notes qualify as Tier 2 capital for regulatory purposes. Trust Preferred Securities We sponsor nine trust subsidiaries, which issued preferred stock to third-party investors. We issued junior subordinated debt securities to those trusts, which we have included in long-term debt. The junior subordinated debt securities are the sole assets of those trusts. The trust preferred securities are callable by us at any time. Interest is payable quarterly; however, we may defer interest payments for up to 20 quarters without default or penalty. As of December 31, 2020, we had no deferred interest.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The following table sets forth the components in accumulated other comprehensive income: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Investment Securities Beginning balance $ 1 $ (47) $ (18) Unrealized gain (loss) 68 57 (30) Less: Tax provision (benefit) 16 14 (7) Net unrealized gain (loss) 52 43 (23) Reclassifications out of AOCI (1) (1) 6 (1) Less: Tax provision — 1 — Net unrealized (loss) gain reclassified out of AOCI (1) 5 (1) Reclassification of certain income tax effects (2) — — (5) Other comprehensive income (loss), net of tax 51 48 (29) Ending balance $ 52 $ 1 $ (47) Cash Flow Hedges Beginning balance $ — $ — $ 2 Unrealized (loss) gain (9) — 27 Less: Tax (benefit) provision (2) — 7 Net unrealized (loss) gain (7) — 20 Reclassifications out of AOCI (1) 2 — (30) Less: Tax benefit — — (8) Net unrealized gain (loss) reclassified out of AOCI 2 — (22) Other comprehensive loss, net of tax (5) — (2) Ending balance $ (5) $ — $ — (1) Reclassifications are reported in noninterest income on the Consolidated Statement of Operations. (2) Income tax effects of the Tax Cuts and Jobs Act are reclassified from AOCI to retained earnings due to early adoption of ASU 2018-02.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share, excluding dilution, is computed by dividing earnings applicable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised and converted into common stock or resulted in the issuance of common stock that could then share in our earnings. The following table sets forth the computation of basic and diluted earnings per share of common stock: For the Years Ended December 31, 2020 2019 2018 (In millions, except share data) Net income applicable to common stockholders $ 538 $ 218 $ 187 Weighted Average Shares Weighted average common shares outstanding 56,094,542 56,584,238 57,520,289 Effect of dilutive securities Stock-based awards 411,271 654,740 802,661 Weighted average diluted common shares 56,505,813 57,238,978 58,322,950 Earnings per common share Basic earnings per common share $ 9.59 $ 3.85 $ 3.26 Effect of dilutive securities Stock-based awards (0.07) (0.05) (0.05) Diluted earnings per common share $ 9.52 $ 3.80 $ 3.21

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation Certain key employees, officers, directors and others are eligible to receive stock awards. Awards that may be granted under the 2016 Stock Plan include stock options, restricted stock, restricted stock units, performance awards, dividend equivalents and other awards. The compensation expense recognized related to stock-based compensation was $17 million, $13 million and $11 million during each of the years ended December 31, 2020, 2019 and 2018, respectively. Restricted Stock and Restricted Stock Units We have issued restricted stock units to officers, directors and certain employees under our long-term incentive program ("LTIP"). Restricted stock units generally will vest in three increments on each annual anniversary of the date of grant beginning with the first anniversary or vest after three years subject to service and performance conditions. On March 20, 2018, the Board approved the adoption of the 2018 Executive Long-Term Incentive Program II ("2018 ExLTIP II"). The 2018 ExLTIP II was provided to certain executives and is comprised of RSUs which are dependent on stock performance, time-based RSUs for which vesting is based on service over a four year period and RSUs that are performance and time vested with the same terms as those granted to other employees under the existing LTIP. As of December 31, 2020, the stock performance hurdles have not been met. At December 31, 2020, the maximum number of shares of common stock that may be issued was 1.3 million shares. The total grant date fair value of awards vested during the years ended December 31, 2020, 2019 and 2018 was $15 million, $10 million and $9 million, respectively. As of December 31, 2020, the total unrecognized compensation cost related to non-vested awards was $17 million with a weighted average expense recognition period of 1.7 years. The following table summarizes restricted stock activity: For the Years Ended December 31, 2020 2019 2018 Number of Shares Weighted Average Grant-Date Fair Value per Share Number of Shares Weighted Average Grant-Date Fair Value per Share Number of Shares Weighted Average Grant-Date Fair Value per Share Restricted Stock and Restricted Stock Units Non-vested balance at beginning of period 1,399,127 $ 28.72 1,620,568 $ 27.27 1,290,450 $ 20.52 Granted 379,835 27.97 338,737 32.11 875,352 34.32 Vested (537,571) 27.06 (379,936) 26.98 (401,379) 23.04 Canceled and forfeited (267,205) 23.13 (180,242) 25.66 (143,855) 21.46 Non-vested balance at end of period 974,186 $ 30.88 1,399,127 $ 28.72 1,620,568 $ 27.27 2017 Employee Stock Purchase Plan The Employee Stock Purchase Plan ("2017 ESPP") was approved on March 20, 2017, by our Board and on May 23, 2017, by our shareholders. The 2017 ESPP became effective July 1, 2017, and will remain effective until terminated by the Board. A total of 800,000 shares of the Company’s common stock are reserved and authorized for issuance for purchase under the 2017 ESPP. There were 181,875 and 106,881 shares issued under the 2017 ESPP during the years ended December 31, 2020 and 2019, respectively, and the associated compensation expense was de minimis for both periods. As of December 31, 2020, there were 350,054 shares authorized for issuance for purchase under the 2017 ESPP but not yet issued.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Components of the provision for income taxes consist of the following: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Current Federal $ 154 $ 17 $ — State 14 6 1 Total current income tax expense 168 23 1 Deferred Federal (10) 39 47 State 8 (14) (3) Total deferred income tax expense (2) 25 44 Total income tax expense $ 166 $ 48 $ 45 Our effective tax rate differs from the statutory federal tax rate. The following is a summary of such differences: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Provision at statutory federal income tax rate $ 148 $ 56 $ 49 (Decreases) increases resulting from: Bank owned life insurance (2) (2) (2) State income tax (benefit), net of federal income tax effect (net of valuation allowance release) 18 (6) (2) Low income housing tax losses (1) (1) (1) Other 3 1 1 Provision for income taxes $ 166 $ 48 $ 45 Effective tax provision rate 23.5 % 18.1 % 19.4 % The increase in our income tax provision and effective tax provision rate during the year ended December 31, 2020, as compared to the year ended December 31, 2019, was primarily due to significantly higher pre-tax book income in the current year. Temporary differences and carryforwards that give rise to DTAs and liabilities are comprised of the following: December 31, 2020 2019 (Dollars in millions) Deferred tax assets Net operating loss carryforwards (Federal and State) $ 36 $ 43 Allowance for credit losses 58 26 Accrued compensation 15 12 Litigation settlement 8 9 Lease liability 6 6 Contingent consideration 7 4 General business reserves 11 2 Other 4 11 Total $ 145 $ 113 Valuation allowance (7) (5) Total net $ 138 $ 108 Deferred tax liabilities Mark-to-market adjustments $ (4) $ (12) Premises and equipment (7) (7) State and local taxes (6) (7) Commercial lease financing (1) (5) Mortgage loan servicing rights (53) (5) Right of use asset (5) (6) Total $ (76) $ (42) Net deferred tax asset $ 62 $ 66 We have not provided deferred income taxes for the Bank’s pre-1988 tax bad debt reserve at December 31, 2020, of approximately $4 million because it is not anticipated that this temporary difference will reverse in the foreseeable future. Such reserves would only be taken into taxable income if the Bank, or a successor institution, liquidates, redeems shares, pays dividends in excess of earnings, or ceases to qualify as a bank for tax purposes. During the years ended December 31, 2020 and 2019, we had federal net operating loss carryforwards of $51 million and $68 million, respectively. These carryforwards, if unused, expire in calendar years 2028 through 2029. As a result of a change in control occurring on January 30, 2009 and November 10, 2020, Section 382 of the Internal Revenue Code places an annual limitation on the use of our new operating loss carryforwards that existed at those times. $51 million of net operating loss carryforwards are subject to certain annual use limitations which expire in calendar years 2028 through 2029. We regularly evaluate the need for DTA valuation allowances based on a more likely than not standard as defined by GAAP. The ability to realize DTAs depends on the ability to generate sufficient taxable income within the carryback or carryforward periods provided for in the tax law for each applicable tax jurisdiction. We had a state DTA of $28 million which includes total state net operating loss carryforwards of $393 million at December 31, 2020, that expire if unused in calendar years through 2033. In connection with our ongoing assessment of deferred taxes, we analyzed each state net operating loss separately, determined the amount of net operating loss available and estimated the amount which we expected to expire unused. Based on that assessment, we recorded a valuation allowance of $7 million to reduce the DTA for state net operating losses to the amount which is more likely than not to be realized. At December 31, 2020, the net state DTAs which will more likely than not be realized, was $21 million. We will continue to regularly assess the realizability of our DTAs. Changes in earnings performance and future earnings projections, among other factors, may cause us to adjust our valuation allowance. Our income tax returns are subject to review and examination by federal, state and local government authorities. On an ongoing basis, numerous federal, state and local examinations are in progress and cover multiple tax years. At December 31, 2020, the Internal Revenue Service had completed an examination of us through the taxable year ended December 31, 2013. The years open to examination by state and local government authorities vary by jurisdiction.

Regulatory Capital

Regulatory Capital	12 Months Ended
	Dec. 31, 2020
Banking and Thrift, Other Disclosures [Abstract]
Regulatory Capital	Regulatory Capital We, along with the Bank, are subject to the Basel III based U.S. capital rules, including capital simplification in 2020. Under these requirements, we must meet specific capital guidelines that involve quantitative measures of the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Bank’s capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional, discretionary actions by regulators that could have a material effect on the Consolidated Financial Statements. To be categorized as "well-capitalized," the Company and the Bank must maintain minimum tangible capital, Tier 1 capital, common equity Tier 1 and total capital ratios as set forth in the table below. We, along with the Bank, are considered "well-capitalized" at both December 31, 2020 and December 31, 2019. The following tables present the regulatory capital requirements under the applicable Basel III based U.S. capital rules: Flagstar Bancorp Actual Minimum Capital Ratios Well-Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in millions) December 31, 2020 Tier 1 capital (to adjusted avg. total assets) $ 2,270 7.71 % $ 1,178 4.0 % $ 1,472 5.0 % Common equity Tier 1 capital (to RWA) 2,030 9.15 % 999 4.5 % 1,442 6.5 % Tier 1 capital (to RWA) 2,270 10.23 % 1,331 6.0 % 1,775 8.0 % Total capital (to RWA) 2,638 11.89 % 1,775 8.0 % 2,219 10.0 % December 31, 2019 Tier 1 capital (to adjusted avg. total assets) $ 1,720 7.57 % $ 909 4.0 % $ 1,136 5.0 % Common equity Tier 1 capital (to RWA) 1,480 9.32 % 715 4.5 % 1,033 6.5 % Tier 1 capital (to RWA) 1,720 10.83 % 953 6.0 % 1,271 8.0 % Total capital (to RWA) 1,830 11.52 % 1,271 8.0 % 1,589 10.0 % Flagstar Bank Actual Minimum Capital Ratios Well-Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in millions) December 31, 2020 Tier 1 capital (to adjusted avg. total assets) $ 2,390 8.12 % $ 1,177 4.0 % $ 1,472 5.0 % Common equity Tier 1 capital (to RWA) 2,390 10.77 % 999 4.5 % 1,443 6.5 % Tier 1 capital (to RWA) 2,390 10.77 % 1,332 6.0 % 1,775 8.0 % Total capital (to RWA) 2,608 11.75 % 1,775 8.0 % 2,219 10.0 % December 31, 2019 Tier 1 capital (to adjusted avg. total assets) $ 1,752 7.71 % $ 909 4.0 % $ 1,136 5.0 % Common equity Tier 1 capital (to RWA) 1,752 11.04 % 714 4.5 % 1,032 6.5 % Tier 1 capital (to RWA) 1,752 11.04 % 952 6.0 % 1,270 8.0 % Total capital (to RWA) 1,862 11.73 % 1,270 8.0 % 1,587 10.0 %

Legal Proceedings, Contingencie

Legal Proceedings, Contingencies and Commitments	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings, Contingencies and Commitments	Legal Proceedings, Contingencies and Commitments Legal Proceedings We and our subsidiaries are subject to various pending or threatened legal proceedings arising out of the normal course of business operations. In addition, the Bank is routinely named in civil actions throughout the country by borrowers and former borrowers relating to the closing, purchase, sale and servicing of mortgage loans. From time to time, governmental agencies also conduct investigations or examinations of various practices of the Bank. In the course of such investigations or examinations, the Bank cooperates with such agencies and provides information as requested. We assess the liabilities and loss contingencies in connection with pending or threatened legal and regulatory proceedings on at least a quarterly basis and establish accruals when we believe it is probable that a loss may be incurred and that the amount of such loss can be reasonably estimated. Once established, litigation accruals are adjusted, as appropriate, in light of additional information. Payments made to settle our liabilities may differ from the contingency or fair value recorded due to factors that differ from our assumptions. At December 31, 2020, we do not believe that the amount of any reasonably possible losses in excess of any amounts accrued with respect to ongoing proceedings or any other known claims will be material to our financial statements or that the ultimate outcome of these actions will have a materially adverse effect on our financial condition, results of operations or cash flows. DOJ Liability On February 24, 2012, the Bank entered into a Settlement Agreement with the DOJ under which we agreed to make future payments totaling $118 million in annual increments of up to $25 million upon meeting all of the following conditions which are evaluated quarterly and include: (a) the reversal of the DTA valuation allowance, which occurred at the end of 2013; (b) the repayment of the Fixed Rate Cumulative Perpetual Preferred Stock, Series C (the "TARP Preferred"), which occurred in July 2016; and (c) the Bank having a Tier 1 Leverage Capital Ratio of 11 percent or greater as filed in the Call Report with the OCC. No payment would be required until six months after the Bank files its Call Report with the OCC first reporting that its Tier 1 Leverage Capital Ratio was 11 percent or greater. If all other conditions were then satisfied, an initial annual payment would be due at that time. The next annual payment is only made if such other conditions continue to be satisfied, otherwise payments are delayed until all such conditions are met. Further, making such a payment must not violate any material banking regulatory requirement and the OCC must not object in writing. Consistent with our business and regulatory requirements, Flagstar shall seek in good faith to fulfill the conditions and will not undertake any conduct,or fail to take any action, for which the purpose is to frustrate or delay our ability to fulfill any of the above conditions. Additionally, if the Bank and Bancorp become party to a business combination in which the Bank or Bancorp represent less than 33.3 percent of the resulting company’s assets, annual payments must commence twelve months after the date of that business combination. The Settlement Agreement meets the definition of a financial instrument for which we elected the fair value option. We consider the assumptions a market participant would make to transfer the liability and evaluate the potential ways we might satisfy the Settlement Agreement and our estimates of the likelihood of these outcomes, which may change over time. The fair value of the liability is subject to significant uncertainty; it is impacted by forecasted estimates of the timing of potential payments, some of which are impacted by inputs including estimates of equity, earnings, timing and amount of dividends and growth of the balance sheet as well as their related impacts on forecasted Tier 1 Leverage Capital Ratio discount rate, the likelihood and types of potential business combinations or any other means by which a payment could be made. While the Settlement Agreement remains outstanding, we are exposed to the risk of further litigation, reputational risk and operational risk related to our ongoing business relationships and discussions from time to time to resolve the Settlement Agreement. For further information on the fair value of the liability, see Note 20 - Fair Value Measurements. Other litigation accruals At December 31, 2020 and December 31, 2019, excluding the fair value liability relating to the DOJ Liability, our total accrual for contingent liabilities and settled litigation was $7 million and $3 million, respectively. Commitments In the normal course of business, we have various commitments outstanding which are not included on our Consolidated Statements of Financial Condition. The following table is a summary of the contractual amount of significant commitments: December 31, 2020 2019 (Dollars in millions) Commitments to extend credit Mortgage loan commitments including interest rate locks $ 10,702 $ 4,099 Warehouse loan commitments 2,849 1,944 Commercial and industrial commitments 1,271 1,107 Other construction commitments 1,934 2,015 HELOC commitments 544 558 Other consumer commitments 121 175 Standby and commercial letters of credit 95 82 Commitments to extend credit are agreements to lend to a customer as long as there is not a violation of any condition established in the contract. Because many of these commitments expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements. Commitments generally have fixed expiration dates or other termination clauses. We evaluate each customer's credit worthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by us, upon extension of credit is based on Management's credit evaluation of the counterparties. These instruments involve, to varying degrees, elements of credit and interest rate risk beyond the amount recognized on the Consolidated Statements of Financial Condition. Our exposure to credit losses in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual amount of those instruments. We utilize the same credit policies in making commitments and conditional obligations as we do for balance sheet instruments. The types of credit we extend are as follows: Mortgage loan commitments including interest rate locks. We enter into mortgage loan commitments, including interest rate locks with our customers. These interest rate lock commitments are considered to be derivative instruments and the fair value of these commitments is recorded on the Consolidated Statements of Financial Condition in other assets. For further information, see Note 11 - Derivative Financial Instruments. Warehouse loan commitments. Lines of credit provided to mortgage originators to fund loans they originate and then sell. The proceeds of the sale of the loans are used to repay the draw on the line used to fund the loans. Commercial and industrial and other construction commitments. Conditional commitments issued under various terms to lend funds to businesses and other entities. These commitments include revolving credit agreements, term loan commitments and short-term borrowing agreements. Many of these loan commitments have fixed expiration dates or other termination clauses and may require payment of a fee. Because many of these commitments are expected to expire without being funded, the total commitment amounts do not necessarily represent future liquidity requirements. HELOC commitments. Commitments to extend, originate or purchase credit are primarily lines of credit to consumers and have specified rates and maturity dates. Many of these commitments also have adverse change clauses, which allow us to cancel the commitment due to deterioration in the borrowers’ creditworthiness or a decline in the collateral value. Other consumer commitments. Conditional commitments issued to accommodate the financial needs of customers. The commitments are made under various terms to lend funds to consumers, which include revolving credit agreements, term loan commitments and short-term borrowing agreements. Standby and commercial letters of credit. Conditional commitments issued to guarantee the performance of a customer to a third party. Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party, while commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party. These financial standby letters of credit irrevocably obligate the bank to pay a third party beneficiary when a customer fails to repay an outstanding loan or debt instrument. We maintain a reserve for the estimate of estimated lifetime credit losses in unfunded commitments to extend credit. Unfunded commitments to extend credit include unfunded loans with available balances, new commitments to lend that are not yet funded and standby and commercial letters of credit. A reserve balance of $28 million at December 31, 2020 and $3 million at December 31, 2019, respectively, is reflected in other liabilities on the Consolidated Statements of Financial Condition. Supplemental executive retirement plan with former CEO.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements We utilize fair value measurements to record or disclose the fair value on certain assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability through an orderly transaction between market participants at the measurement date. The determination of fair values of financial instruments often requires the use of estimates. In cases where quoted market values in an active market are not available, we use present value techniques and other valuation methods to estimate the fair values of our financial instruments. These valuation models rely on market-based parameters when available, such as interest rate yield curves or credit spreads. Unobservable inputs may be based on Management's judgment, assumptions and estimates related to credit quality, our future earnings, interest rates and other relevant inputs. These valuation methods require considerable judgment and the resulting estimates of fair value can be significantly affected by the assumptions made and methods used. Valuation Hierarchy U.S. GAAP establishes a three-level valuation hierarchy for disclosure of fair value measurements. The hierarchy is based on the transparency of the inputs used in the valuation process with the highest priority given to quoted prices available in active markets and the lowest priority given to unobservable inputs where no active market exists, as discussed below: Level 1 - Quoted prices (unadjusted) for identical assets or liabilities in active markets in which we can participate as of the measurement date, Level 2 - Quoted prices for similar instruments in active markets and other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument, and Level 3 - Unobservable inputs that reflect our own assumptions about the assumptions that market participants would use in pricing an asset or liability. A financial instrument's categorization within the valuation hierarchy is based upon the lowest level of input within the valuation hierarchy that is significant to the overall fair value measurement. Transfers between levels of the fair value hierarchy are recognized at the end of the reporting period. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following tables present the financial instruments carried at fair value by caption on the Consolidated Statements of Financial Condition and by level in the valuation hierarchy: December 31, 2020 Level 1 Level 2 Level 3 Total Fair Value (Dollars in millions) Investment securities available-for-sale Agency - Commercial $ — $ 1,061 $ — $ 1,061 Agency - Residential — 735 — 735 Municipal obligations — 28 — 28 Corporate debt obligations — 77 — 77 Other MBS — 42 — 42 Certificate of deposit — 1 — 1 Loans held-for-sale Residential first mortgage loans — 7,009 — 7,009 Loans held-for-investment Residential first mortgage loans — 11 — 11 Home equity — — 2 2 Mortgage servicing rights — — 329 329 Derivative assets Rate lock commitments (fallout-adjusted) — — 208 208 Mortgage-backed securities forwards — 14 — 14 Interest rate swaps and swaptions — 59 — 59 Total assets at fair value $ — $ 9,037 $ 539 $ 9,576 Derivative liabilities Mortgage-backed securities forwards — (98) — $ (98) Interest rate swaps and swaptions — (4) — (4) DOJ Liability — — (35) (35) Total liabilities at fair value $ — $ (102) $ (35) $ (137) December 31, 2019 Level 1 Level 2 Level 3 Total Fair Value (Dollars in millions) Investment securities available-for-sale Agency - Commercial $ — $ 947 $ — $ 947 Agency - Residential — 1,015 — 1,015 Municipal obligations — 31 — 31 Corporate debt obligations — 77 — 77 Other MBS — 45 — 45 Certificate of deposit — 1 — 1 Loans held-for-sale Residential first mortgage loans — 5,219 — 5,219 Loans held-for-investment Residential first mortgage loans — 10 — 10 Home equity — — 2 2 Mortgage servicing rights — — 291 291 Derivative assets Rate lock commitments (fallout-adjusted) — — 34 34 Mortgage-backed securities forwards — 2 — 2 Interest rate swaps and swaptions — 26 — 26 Total assets at fair value $ — $ 7,373 $ 327 $ 7,700 Derivative liabilities Rate lock commitments (fallout-adjusted) $ — $ — $ (1) $ (1) Mortgage-backed securities forwards — (9) — (9) Interest rate swaps — (8) — (8) DOJ Liability — — (35) (35) Contingent consideration — — (10) (10) Total liabilities at fair value $ — $ (17) $ (46) $ (63) Fair Value Measurements Using Significant Unobservable Inputs The following tables include a roll forward of the Consolidated Statements of Financial Condition amounts (including the change in fair value) for financial instruments classified by us within Level 3 of the valuation hierarchy: Balance at Total Gains / Purchases / Originations Sales Settlement Transfers In (Out) Balance at End of Year (Dollars in millions) Year Ended December 31, 2020 Assets Loans held-for-investment Home equity $ 2 $ — $ — $ — $ — $ — $ 2 Mortgage servicing rights (1) 291 (159) 268 (71) — — 329 Rate lock commitments (net) (1)(2) 34 358 1,005 — — (1,189) 208 Totals $ 327 $ 199 $ 1,273 $ (71) $ — $ (1,189) $ 539 Liabilities DOJ Liability $ (35) $ — $ — $ — $ — $ — $ (35) Contingent consideration (10) (17) — — 27 — — Totals $ (45) $ (17) $ — $ — $ 27 $ — $ (35) Year Ended December 31, 2019 Assets Loans held-for-investment Home equity $ 2 $ — $ — $ — $ — $ — $ 2 Mortgage servicing rights (1) 290 (165) 223 (57) — — 291 Rate lock commitments (net) (1)(2) 20 86 326 — — (398) 34 Totals $ 312 $ (79) $ 549 $ (57) $ — $ (398) $ 327 Liabilities DOJ Liability $ (60) $ 25 $ — $ — $ — $ — $ (35) Contingent consideration (6) (7) — — 3 — (10) Totals $ (66) $ 18 $ — $ — $ 3 $ — $ (45) Year Ended December 31, 2018 Assets Loans held-for-investment Home equity $ 4 $ — $ — $ — $ (2) $ — $ 2 Mortgage servicing rights (1) 291 (18) 356 (339) — — 290 Rate lock commitments (net) (1)(2) 24 (34) 235 — — (205) 20 Totals $ 319 $ (52) $ 591 $ (339) $ (2) $ (205) $ 312 Liabilities DOJ Liability $ (60) $ — $ — $ — $ — $ — $ (60) Contingent consideration (25) 13 — — 6 — (6) Totals $ (85) $ 13 $ — $ — $ 6 $ — $ (66) (1) We utilized swaptions, futures, forward agency and loan sales and interest rate swaps to manage the risk associated with mortgage servicing rights and rate lock commitments. Gains and losses for individual lines do not reflect the effect of our risk management activities related to such Level 3 instruments. (2) Rate lock commitments are reported on a fallout-adjusted basis. Transfers out of Level 3 represent the settlement value of the commitments that are transferred to LHFS, which are classified as Level 2 assets. The following tables present the quantitative information about recurring Level 3 fair value financial instruments and the fair value measurements as of: Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars in millions) December 31, 2020 Assets Loans held-for-investment Home equity $ 2 Discounted cash flows Discount rate 7.2% -10.8% (9.0%) 12.6% - 18.9% (15.8%) 1.5%-2.3% (1.9%) Mortgage servicing rights $ 329 Discounted cash flows Option adjusted spread 3.4% - 21.2% (8.0%) 0% - 13.3% (10.5%) $67 - $95 ($81) Rate lock commitments (net) $ 208 Consensus pricing Closing pull-through rate 75.7% - 87.2% (77.5%) Liabilities DOJ Liability $ (35) Discounted cash flows See description below See description below Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars in millions) December 31, 2019 Assets Loans held-for-investment Home equity $ 2 Discounted cash flows Discount rate 7.2% -10.8% (9.0%) 13.0% - 19.5% (16.2%) 2.7%-4.0% (3.3%) (1) Mortgage servicing rights $ 291 Discounted cash flows Option adjusted spread 2.4% - 20.4% (5.3%) 0% - 12.3% (10.6%) $67 - $95 ($84) (1) Rate lock commitments (net) $ 34 Consensus pricing Origination pull-through rate 80.0% - 87.2% (81.5%) (1) Liabilities DOJ Liability $ (35) Discounted cash flows See description below See description below Contingent consideration $ (10) Discounted cash flows See description below See description below (2) (1) Unobservable inputs were weighted by their relative fair value of the instruments. (2) Unobservable inputs were not weighted as only one instrument exists. Recurring Significant Unobservable Inputs Home equity. The most significant unobservable inputs used in the fair value measurement of the home equity loans are discount rates, constant prepayment rates and default rates. The constant prepayment and default rates are based on a 12 month historical average. Significant increases (decreases) in the discount rate in isolation result in a significantly lower (higher) fair value measurement. Increases (decreases) in prepay rates in isolation result in a higher (lower) fair value and increases (decreases) in default rates in isolation result in a lower (higher) fair value. MSRs. The significant unobservable inputs used in the fair value measurement of the MSRs are option adjusted spreads, prepayment rates and cost to service. Significant increases (decreases) in all three assumptions in isolation result in a significantly lower (higher) fair value measurement. Weighted average life (in years) is used to determine the change in fair value of MSRs. For December 31, 2020 and December 31, 2019, the weighted average life (in years) for the entire MSR portfolio was 4.2 and 4.1, respectively. DOJ Liability. The significant unobservable inputs used in the fair value measurement of the DOJ Liability are the discount rate, asset growth rate, return on assets, dividend rate and potential ways we might be required to begin making DOJ Liability payments and our estimates of the likelihood of these outcomes, as further discussed in Note 19 - Legal Proceedings, Contingencies and Commitments. The DOJ Liability had a fair value adjustment of $25 million for the year ended December 31, 2019. This reduced the liability to $35 million based on changes in the probability of potential ways we might be required to begin making DOJ Liability payments and our estimates of the likelihood of these outcomes. Our assessment of these outcomes reflect a reduced likelihood, and longer timing, for potential future payments. Rate lock commitments. The significant unobservable input used in the fair value measurement of the rate lock commitments is the pull through rate. The pull through rate is a statistical analysis of our actual rate lock fallout history to determine the sensitivity of the residential mortgage loan pipeline compared to interest rate changes and other deterministic values. New market prices are applied based on updated loan characteristics and new fallout ratios (i.e. the inverse of the pull through rate) are applied accordingly. Significant increases (decreases) in the pull through rate in isolation result in a significantly higher (lower) fair value measurement. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis We also have assets that are subject to measurement at fair value on a nonrecurring basis under certain conditions. The following table presents assets measured at fair value on a nonrecurring basis: Total (1) Level 2 Level 3 Gains/(Losses) (Dollars in millions) December 31, 2020 Residential first mortgage loans $ 30 $ 30 $ — $ (1) Commercial loans 57 — 57 — Impaired loans held-for-investment (2) Residential first mortgage loans 24 — 24 (3) Repossessed assets (3) 8 — 8 (3) Totals $ 119 $ 30 $ 89 $ (7) December 31, 2019 Loans held-for-sale (2) $ 6 $ 6 $ — $ (1) Impaired loans held-for-investment (2) Residential first mortgage loans 14 — 14 (5) Repossessed assets (3) 10 — 10 (3) Totals $ 30 $ 6 $ 24 $ (9) (1) The fair values are determined at various dates dependent upon when certain conditions were met requiring fair value measurement. (2) Gains/(losses) reflect fair value adjustments on assets for which we did not elect the fair value option. (3) Gains/(losses) reflect write downs of repossessed assets based on the estimated fair value of the specific assets. The following table presents the quantitative information about nonrecurring Level 3 fair value financial instruments and the fair value measurements: Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars in millions) December 31, 2020 Commercial loans $ 57 Fair value of collateral Market price N/A (2) Impaired loans held-for-investment Residential first mortgage loans $ 24 Fair value of collateral Loss severity discount 0% - 100% (12.8%) (1) Repossessed assets $ 8 Fair value of collateral Loss severity discount 0% - 96.3% (24.5%) (1) December 31, 2019 Impaired loans held-for-investment Residential first mortgage loans $ 14 Fair value of collateral Loss severity discount 25% - 30% (25.9%) (1) Repossessed assets $ 10 Fair value of collateral Loss severity discount 0% - 100% (17.1%) (1) (1) Unobservable inputs were weighted by their relative fair value of the instruments. (2) Fair value has been determined based on an unobservable market price. Nonrecurring Significant Unobservable Inputs The significant unobservable inputs used in the fair value measurement of the impaired loans and repossessed assets are appraisals or other third-party price evaluations which incorporate measures such as recent sales prices for comparable properties. Fair Value of Financial Instruments The following table presents the carrying amount and estimated fair value of financial instruments that are carried either at fair value, cost or amortized cost: December 31, 2020 Estimated Fair Value Carrying Value Total Level 1 Level 2 Level 3 (Dollars in millions) Assets Cash and cash equivalents $ 623 $ 623 $ 623 $ — $ — Investment securities available-for-sale 1,944 1,944 — 1,944 — Investment securities held-to-maturity 377 393 — 393 — Loans held-for-sale 7,098 7,098 — 7,098 — Loans held-for-investment 16,227 16,188 — 11 16,177 Loans with government guarantees 2,516 2,498 — 2,498 — Mortgage servicing rights 329 329 — — 329 Federal Home Loan Bank stock 377 377 — 377 — Bank owned life insurance 356 358 — 358 — Repossessed assets 8 8 — — 8 Other assets, foreclosure claims 17 17 — 17 — Derivative financial instruments 281 281 — 73 208 Liabilities Retail deposits Demand deposits and savings accounts $ (8,616) $ (7,864) $ — $ (7,864) $ — Certificates of deposit (1,355) (1,365) — (1,365) — Wholesale deposits (1,031) (1,047) — (1,047) — Government deposits (1,765) (1,706) — (1,706) — Custodial deposits (7,206) (7,133) — (7,133) — Federal Home Loan Bank advances (5,100) (5,124) — (5,124) — Long-term debt (641) (596) — (596) — DOJ litigation settlement (35) (35) — — (35) Derivative financial instruments (102) (102) — (102) — December 31, 2019 Estimated Fair Value Carrying Value Total Level 1 Level 2 Level 3 (Dollars in millions) Assets Cash and cash equivalents $ 426 $ 426 $ 426 $ — $ — Investment securities available-for-sale 2,116 2,116 — 2,116 — Investment securities held-to-maturity 598 599 — 599 — Loans held-for-sale 5,258 5,258 — 5,258 — Loans held-for-investment 12,129 12,031 — 10 12,021 Loans with government guarantees 736 707 — 707 — Mortgage servicing rights 291 291 — — 291 Federal Home Loan Bank stock 303 303 — 303 — Bank owned life insurance 349 349 — 349 — Repossessed assets 10 10 — — 10 Other assets, foreclosure claims 45 45 — 45 — Derivative financial instruments, assets 62 88 — 54 34 Liabilities Retail deposits Demand deposits and savings accounts $ (6,811) $ (6,050) $ — $ (6,050) $ — Certificates of deposit (2,353) (2,368) — (2,368) — Wholesale deposits (633) (640) — (640) — Government deposits (1,213) (1,156) — (1,156) — Custodial deposits (4,136) (4,066) — (4,066) — Federal Home Loan Bank advances (4,815) (4,816) — (4,816) — Long-term debt (496) (462) — (462) — DOJ Liability (35) (35) — — (35) Contingent consideration (10) (10) — — (10) Derivative financial instruments, liabilities (18) (44) — (43) (1) Fair Value Option We elected the fair value option for certain items as discussed throughout the Notes to the Consolidated Financial Statements to more closely align the accounting method with the underlying economic exposure. Interest income on LHFS is accrued on the principal outstanding primarily using the "simple-interest" method. The following table reflects the change in fair value included in earnings of financial instruments for which the fair value option has been elected: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Assets Loans held-for-sale Net gain on loan sales $ 1,204 $ 348 $ (29) Loans held-for-investment Other noninterest income — 1 — Liabilities DOJ Liability Other noninterest income — 25 — The following table reflects the difference between the aggregate fair value and aggregate remaining contractual principal balance outstanding for assets and liabilities for which the fair value option has been elected: December 31, 2020 December 31, 2019 Unpaid Principal Balance Fair Value Fair Value Over / (Under) Unpaid Principal Balance Unpaid Principal Balance Fair Value Fair Value Over / (Under) Unpaid Principal Balance (Dollars in millions) Assets Nonaccrual loans Loans held-for-sale $ 9 $ 7 $ (2) $ 3 $ 3 $ — Loans held-for-investment 9 8 (1) 5 4 (1) Total nonaccrual loans 18 15 (3) 8 7 (1) Other performing loans Loans held-for-sale 6,704 7,002 298 5,057 5,216 159 Loans held-for-investment 5 4 (1) 8 8 — Total other performing loans 6,709 7,006 297 5,065 5,224 159 Total loans Loans held-for-sale 6,713 7,009 296 5,060 5,219 159 Loans held-for-investment 14 12 (2) 13 12 (1) Total loans $ 6,727 $ 7,021 $ 294 $ 5,073 $ 5,231 $ 158 Liabilities DOJ Liability (1) $ (118) $ (35) $ 83 $ (118) $ (35) $ 83

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segment Information	Segment Information Our operations are conducted through three operating segments: Community Banking, Mortgage Originations and Mortgage Servicing. The Other segment includes the remaining reported activities. Operating segments are defined as components of an enterprise that engage in business activity from which revenues are earned and expenses are incurred for which discrete financial information is available that is evaluated regularly by executive management in deciding how to allocate resources and in assessing performance. The operating segments have been determined based on the products and services offered and reflect the manner in which financial information is currently evaluated by Management. Each segment operates under the same banking charter, but is reported on a segmented basis for this report. Each of the operating segments is complementary to each other and because of the interrelationships of the segments, the information presented is not indicative of how the segments would perform if they operated as independent entities. As a result of Management's evaluation of our segments, effective January 1, 2020, certain departments have been re-aligned between the Community Banking and Mortgage Originations segments. Specifically, a majority of the residential mortgage HFI portfolio is now part of the Mortgage Originations segment. The income and expenses relating to these changes are reflected in our financial statements and all prior period segment financial information has been recast to conform to the current presentation. The Community Banking segment originates loans, provides deposits and fee based services to consumer, business, and mortgage lending customers through its Branch Banking, Business Banking and Commercial Banking, Government Banking and Warehouse Lending. Products offered through these groups include checking accounts, savings accounts, money market accounts, certificates of deposit, consumer loans, commercial loans, commercial real estate loans, equipment finance and leasing, home builder finance loans and warehouse lines of credit. Other financial services available include consumer and corporate card services, customized treasury management solutions, merchant services and capital markets services such as loan syndications, and investment and insurance products and services. The interest income on LHFI is recognized in the Community Banking segment, excluding residential first mortgages and newly originated home equity products within the Mortgage Originations segment. The Mortgage Originations segment originates and acquires one-to-four family residential mortgage loans to sell or hold on our balance sheet. Loans originated-to-sell comprise the majority of the lending activity. These loans are originated through mortgage branches, call centers, the Internet and third-party counterparties. The Mortgage Originations segment recognizes interest income on loans that are held for sale and the gains from sales associated with these loans, along with the interest income on residential mortgages and newly originated home equity products within LHFI. The Mortgage Servicing segment services and subservices mortgage and other consumer loans for others on a fee for service basis and may also collect ancillary fees and earn income through the use of noninterest-bearing escrows. Revenue for those serviced and subserviced loans is earned on a contractual fee basis, with the fees varying based on our responsibilities and the status of the underlying loans. The Mortgage Servicing segment also services loans for our LHFI portfolio and our own LHFS portfolio in the Mortgage Originations segment, for which it earns revenue via an intercompany service fee allocation. The Other segment includes the treasury functions, which include the impact of interest rate risk management, balance sheet funding activities and the administration of the investment securities portfolios, as well as miscellaneous other expenses of a corporate nature. In addition, the Other segment includes revenue and expenses related to treasury and corporate assets and liabilities and equity not directly assigned or allocated to the Community Banking, Mortgage Originations or Mortgage Servicing operating segments. Revenues are comprised of net interest income (before the provision (benefit) for credit losses) and noninterest income. Noninterest expenses and a majority of provision (benefit) for income taxes, are allocated to each operating segment. Provision for credit losses is allocated to segments based on net charge-offs and changes in outstanding balances. In contrast, the level of the consolidated provision for credit losses is determined based on an allowance model using the methodologies described in Item 2 – MD&A. The net effect of the credit provision is recorded in the Other segment. Allocation methodologies may be subject to periodic adjustment as the internal management accounting system is revised and the business or product lines within the segments change. The following tables present financial information by business segment for the periods indicated: Year Ended December 31, 2020 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 570 $ 191 $ 18 $ (94) $ 685 Provision (benefit) for credit losses 3 (11) — 157 149 Net interest income after provision (benefit) for credit losses 567 202 18 (251) 536 Net gain on loan sales 2 969 — — 971 Loan fees and charges 1 98 66 — 165 Net return on mortgage servicing rights — 10 — — 10 Loan administration (expense) income (3) (35) 151 (29) 84 Other noninterest income 61 8 — 26 95 Total noninterest income 61 1,050 217 (3) 1,325 Compensation and benefits 108 161 46 151 466 Commissions 2 230 — — 232 Loan processing expense 5 55 36 2 98 Other noninterest expense 271 136 79 (125) 361 Total noninterest expense 386 582 161 28 1,157 Income before indirect overhead allocations and income taxes 242 670 74 (282) 704 Indirect overhead allocation (expense) income (40) (60) (19) 119 — Provision (benefit) for income taxes 42 128 12 (16) 166 Net income (loss) $ 160 $ 482 $ 43 $ (147) $ 538 Intersegment (expense) revenue $ (96) $ (48) $ 39 $ 105 $ — Average balances Loans held-for-sale $ 1 $ 5,541 $ — $ — $ 5,542 Loans with government guarantees $ — $ 1,571 $ — $ — $ 1,571 Loans held-for-investment (2) $ 11,376 $ 2,591 $ — $ 30 $ 13,997 Total assets $ 11,760 $ 10,735 $ 85 $ 4,328 $ 26,908 Deposits $ 10,996 $ — $ 6,712 $ 836 $ 18,544 (1) Includes offsetting adjustments made to reclassify income and expenses relating to operating leases and custodial deposits for subservicing clients. (2) Includes adjustment made to reclassify operating lease assets to loans held-for-investment. Year Ended December 31, 2019 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 410 $ 145 $ 16 $ (9) $ 562 Provision (benefit) for credit losses 20 2 — (4) 18 Net interest income after provision (benefit) for credit losses 390 143 16 (5) 544 Net (loss) gain on loan sales (14) 349 — — 335 Loan fees and charges 1 67 32 — 100 Net return on mortgage servicing rights — 6 — — 6 Loan administration (expense) income (3) (24) 124 (67) 30 Other noninterest income 62 12 — 65 139 Total noninterest income 46 410 156 (2) 610 Compensation and benefits 103 111 28 135 377 Commissions 2 109 — — 111 Loan processing expense 6 36 36 2 80 Other noninterest expense 165 90 59 6 320 Total noninterest expense 276 346 123 143 888 Income before indirect overhead allocations and income taxes 160 207 49 (150) 266 Indirect overhead allocation (41) (42) (18) 101 — Provision (benefit) for income taxes 24 35 6 (17) 48 Net income (loss) $ 95 $ 130 $ 25 $ (32) $ 218 Intersegment (expense) revenue $ (3) $ 13 $ 26 $ (36) $ — Average balances Loans held-for-sale $ — $ 3,952 $ — $ — $ 3,952 Loans with government guarantees $ — $ 553 $ — $ — $ 553 Loans held-for-investment (2) $ 7,876 $ 3,027 $ — $ 29 $ 10,932 Total assets $ 8,319 $ 8,467 $ 47 $ 3,841 $ 20,674 Deposits $ 10,301 $ — $ 3,851 $ 556 $ 14,708 (1) Includes offsetting adjustments made to reclassify income and expenses relating to operating leases and custodial deposits for subservicing clients. (2) Includes adjustment made to reclassify operating lease assets to loans held-for-investment. Year Ended December 31, 2018 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 272 $ 170 $ 7 $ 48 $ 497 Provision (benefit) for credit losses 2 2 — (12) (8) Net interest income after provision for credit losses 270 168 7 60 505 Net (loss) gain on loan sales (1) 201 — — 200 Loan fees and charges — 62 25 — 87 Net return on mortgage servicing rights — 36 — — 36 Loan administration (expense) income (2) (15) 69 (29) 23 Other noninterest income 45 15 — 33 93 Total noninterest income 42 299 94 4 439 Compensation and benefits 70 105 19 124 318 Commissions 2 78 — — 80 Loan processing expense 4 26 26 3 59 Other noninterest expense 101 66 44 44 255 Total noninterest expense 177 275 89 171 712 Income before indirect overhead allocations and income taxes 135 192 12 (107) 232 Indirect overhead allocation (39) (68) (20) 127 — Provision (benefit) for income taxes 20 27 (2) — 45 Net income (loss) $ 76 $ 97 $ (6) $ 20 $ 187 Intersegment revenue (expense) $ 10 $ 1 $ 19 $ (30) $ — Average balances Loans held-for-sale $ — $ 4,196 $ — $ — $ 4,196 Loans with government guarantees $ — $ 303 $ — $ — $ 303 Loans held-for-investment (2) $ 5,576 $ 2,814 $ — $ 29 $ 8,419 Total assets $ 5,760 $ 8,253 $ 34 $ 3,933 $ 17,980 Deposits $ 8,580 $ — $ 1,883 $ 312 $ 10,775 (1) Includes offsetting adjustments made to reclassify income and expenses relating to operating leases and custodial deposits for subservicing clients. (2) Includes adjustment made to reclassify operating lease assets to loans held-for-investment.

Holding Company Only Financial

Holding Company Only Financial Statements	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Holding Company Only Financial Statements	Holding Company Only Financial Statements The following are the unconsolidated financial statements for the Holding Company on a stand-alone basis. These condensed financial statements should be read in conjunction with the Consolidated Financial Statements and Notes thereto. The Holding Company's principal sources of funds are cash dividends paid by the Bank to the Holding Company. Flagstar Bancorp, Inc. Condensed Unconsolidated Statements of Financial Condition (Dollars in millions) December 31, 2020 2019 (Dollars in millions) Assets Cash and cash equivalents $ 304 $ 233 Investment in subsidiaries (1) 2,551 2,031 Other assets 17 47 Total assets $ 2,872 $ 2,311 Liabilities and Stockholders’ Equity Liabilities Long-term debt $ 641 $ 496 Other liabilities 30 27 Total liabilities 671 523 Stockholders’ Equity Common stock 1 1 Additional paid in capital 1,346 1,483 Accumulated other comprehensive income 47 1 Retained earnings 807 303 Total stockholders’ equity 2,201 1,788 Total liabilities and stockholders’ equity $ 2,872 $ 2,311 (1) Includes unconsolidated trusts of $7 million for December 31, 2020 and 2019. Flagstar Bancorp, Inc. Condensed Unconsolidated Statements of Operations (Dollars in millions) For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Income Interest $ 2 $ 4 $ 1 Cash dividends received from subsidiaries 82 100 — Total 84 104 1 Expenses Interest 25 28 27 General and administrative 14 6 7 Total 39 34 34 Net income (loss) before undistributed income of subsidiaries 45 70 (33) Equity in undistributed income of subsidiaries 484 142 212 Net income before income taxes 529 212 179 Benefit for income taxes (9) (6) (8) Net income 538 218 187 Other comprehensive income (loss) (1) 46 48 (31) Comprehensive income $ 584 $ 266 $ 156 (1) See Consolidated Statements of Comprehensive Income for other comprehensive income (loss) detail. Flagstar Bancorp, Inc. Condensed Unconsolidated Statements of Cash Flows (Dollars in millions) For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Net income $ 538 $ 218 $ 187 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed income of subsidiaries (566) (241) (177) Dividends received from subsidiaries 82 104 — Other 34 10 (5) Net cash provided by operating activities 88 91 5 Investing Activities Net cash provided by investing activities — — — Financing Activities Stock buyback (150) (50) — Repayment of long-term debt (4) — — Proceeds from issuance of long-term debt 150 — — Debt issuance costs (2) — — Dividends declared and paid (11) (9) — Net cash used in financing activities (17) (59) — Net increase in cash and cash equivalents 71 32 5 Cash and cash equivalents, beginning of year 233 201 196 Cash and cash equivalents, end of year $ 304 $ 233 $ 201

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	Quarterly Financial Data (Unaudited) The following table represents summarized data for each of the quarters in 2020 and 2019: 2020 Fourth Third Second First (Dollars in millions, except per share data) Interest income $ 212 $ 206 $ 201 $ 201 Interest expense 23 26 33 53 Net interest income 189 180 168 148 Provision for credit losses 2 32 102 14 Net interest income after provision for credit losses 187 148 66 134 Net gain on loan sales 232 346 303 90 Loan fees and charges 53 45 41 26 Net return (loss) on mortgage servicing rights — 12 (8) 6 Loan administration income 25 26 21 12 Deposit fees and charges 8 8 7 9 Other noninterest income 19 15 14 14 Noninterest expense 319 305 296 235 Income before income tax 205 295 148 56 Provision for income taxes 51 73 32 10 Net income from continuing operations $ 154 $ 222 $ 116 $ 46 Basic income per share $ 2.86 $ 3.90 $ 2.04 $ 0.80 Diluted income per share $ 2.83 $ 3.88 $ 2.03 $ 0.80 2019 Fourth Third Second First (Dollars in millions, except per share data) Interest income $ 213 $ 203 $ 198 $ 180 Interest expense 61 57 60 54 Net interest income 152 146 138 126 Provision for credit losses — 1 17 — Net interest income after provision for credit losses 152 145 121 126 Net gain on loan sales 101 110 75 49 Loan fees and charges 30 29 24 17 Net (loss) return on the mortgage servicing rights (3) (2) 5 6 Loan administration income 8 5 6 11 Deposit fees and charges 10 10 10 8 Other noninterest income 16 19 48 18 Noninterest expense 245 238 214 191 Income before income tax 69 78 75 44 Provision for income taxes 11 15 14 8 Net income from continuing operations $ 58 $ 63 $ 61 $ 36 Basic income per share $ 1.01 $ 1.12 $ 1.08 $ 0.64 Diluted income per share $ 1.00 $ 1.11 $ 1.06 $ 0.63

Description of Business, Basi_2

Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation and Basis of Presentation	Consolidation and Basis of Presentation    Our accounting and financial reporting policies conform to accounting principles generally accepted in the United States. Additionally, where applicable the policies conform to the accounting and reporting guidelines prescribed by regulatory authorities. Certain prior period amounts have been reclassified to conform to the current period presentation. The preparation of the Consolidated Financial Statements, requires Management to make estimates and assumptions that affect reported amounts of assets and liabilities, revenues and expenses and disclosures of contingent assets and liabilities. Actual results could be materially different from these estimates.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents include cash on hand, amounts due from correspondent banks and the FRB, and short-term investments that have a maturity at the date of acquisition of three months or less and are readily convertible to cash. Restricted cash includes cash that the Bank pledges as maintenance margin on centrally cleared derivatives and is included in other assets on the Consolidated Statements of Financial Condition.
Investment Securities	Investment Securities We measure securities classified as AFS at fair value, with unrealized gains and losses, net of tax, included in other comprehensive income (loss) in stockholders’ equity. We recognize realized gains and losses on AFS securities when securities are sold. The cost of securities sold is based on the specific identification method. Any gains or losses realized upon the sale of a security are reported in other noninterest income in the Consolidated Statements of Operations. The fair value of investment securities is based on observable market prices, when available. If observable market prices are not available, our valuations are based on alternative methods, including: quotes for similar fixed-income securities, matrix pricing, or discounted cash flow methods. The fair values, obtained through an independent third party utilizing a pricing service, are compared to independent pricing sources on a quarterly basis. For further information, see Note 2 - Investment Securities and Note 20 - Fair Value Measurements. Investment securities HTM are carried at amortized cost and are adjusted for amortization of premiums and accretion of discounts using the interest method. Transfers of investment securities into the HTM category from the AFS category are accounted for at fair value at the date of transfer. Any related unrealized holding gain (loss), net of tax, that was included in the transfer is retained in other comprehensive income (loss) and is amortized as an adjustment to interest income over the remaining life of the securities. We separately evaluate our HTM debt securities for any credit losses. For each of the three years ended December 31, 2020, all investment securities HTM held by us were issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses; therefore, we apply a zero credit loss assumption to this portfolio and did not record any credit allowance for each of the three years ended December 31, 2020.
Loans Held-for-Sale	Loans Held-for-Sale We classify loans as LHFS when we originate or purchase loans that we intend to sell. We have elected the fair value option for the majority of our LHFS. We estimate the fair value of mortgage loans based on quoted market prices for securities backed by similar types of loans, where available, or by discounting estimated cash flows using observable inputs inclusive of interest rates, prepayment speeds and loss assumptions for similar collateral. LHFS that are recorded at lower of cost or fair value may be carried at fair value on a nonrecurring basis when the fair value is less than cost. For further information, see Note 20 - Fair Value Measurements. Loans that are transferred into the LHFS portfolio from the LHFI portfolio, due to a change in intent, are recorded at the lower of cost or fair value. Gains or losses recognized upon the sale of loans are determined using the specific identification method.
Loans Held-for-Investment	Loans Held-for-Investment We classify loans that we have the intent and ability to hold for the foreseeable future or until maturity as LHFI. Loans held-for-investment are reported at their amortized cost, which includes the outstanding principal balance adjusted for any unamortized premiums, discounts, deferred fees and costs. Accrued interest receivable on loans held-for-for investment totaled $43 million at December 31, 2020 and was reported in Other assets on the Consolidated Statements of Financial Condition. Premiums and discounts on purchased loans and non-refundable loan origination and commitment fees, net of direct costs of originating or acquiring loans, are deferred and recognized over the life of the related loans as an adjustment to the loans’ effective yield, which is included in interest income on loans in the Consolidated Statements of Operations. Loans originally classified as LHFS, for which we have elected the fair value option, and subsequently transferred to LHFI continue to be measured and reported at fair value on a recurring basis. Changes in fair value are recorded to other noninterest income on the Consolidated Statements of Operations. The fair value of these loans is determined using the same methods described above for LHFS. For further information, see Note 20 - Fair Value Measurements. When loans originally classified as LHFS or as LHFI are reclassified due to a change in intent or ability to hold, cash flows associated with the loans are classified in the Consolidated Statements of Cash Flows as operating or investing, in accordance with the initial classification of the loans.
Past Due, Impaired and Modified (Troubled Debt Restructuring) Loans	Past Due, Impaired and Modified (Troubled Debt Restructuring) Loans Loans are considered to be past due when any payment of principal or interest is 30 days past the scheduled payment date. While it is the goal of Management to collect on loans, we attempt to work out a satisfactory repayment schedule or modification with past due borrowers and will undertake foreclosure proceedings if the delinquency is not satisfactorily resolved. Our practices regarding past due loans are designed to both assist borrowers in meeting their contractual obligations and minimize losses incurred by the bank. We cease the accrual of interest on all classes of consumer and commercial loans upon the earlier of, becoming 90 days past due, or when doubt exists as to the ultimate collection of principal or interest (classified as nonaccrual or NPLs). When a loan is placed on nonaccrual status, the accrued interest income is reversed against interest income and the loan may only return to accrual status when principal and interest become current and are anticipated to be fully collectible. We do not measure an ACL for accrued interest receivables as accrued interest is written off in a timely manner. Loans are considered impaired if it is probable that payment of all interest and principal will not be made in accordance with the original contractual terms of the loan agreement or when any portion of principal or interest is 90 days past due. This classification includes both performing and nonperforming modified loans. For further information, see Note 4 - Loans Held-for-Investment. When a loan is considered impaired, the accrual of interest income is discontinued until the receipt of principal and interest is no longer in doubt. Interest income is recognized on impaired loans using a cost recovery method unless amounts contractually due are not in doubt. Cash received on nonperforming impaired loans is applied entirely against principal until the loan has been collected in full, after which time any additional cash receipts are recognized as interest income.
Loan Modifications (Troubled Debt Restructurings)	Loan Modifications (Troubled Debt Restructurings) We may modify certain loans in both our consumer and commercial loan portfolios to retain customers or to maximize collection of the outstanding loan balance. We have programs designed to assist borrowers by extending payment dates or reducing the borrower's contractual payments. All loan modifications are made on a case-by-case basis. Our standards relating to loan modifications consider, among other factors, minimum verified income requirements, cash flow analysis and collateral valuations. TDRs result in those instances in which a borrower demonstrates financial difficulty and for which a concession has been granted, including reductions of interest rates, extensions of amortization periods, principal and/or interest forgiveness and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of collateral. These loans are classified as nonperforming TDRs if the loan was nonperforming prior to the restructuring, or based upon the results of a contemporaneous credit evaluation. Such loans will continue on nonaccrual status until the borrower has established a willingness and ability to make the restructured payments for at least six months, after which they will be classified as performing TDRs and will begin to accrue interest. Performing and nonperforming TDRs remain impaired as interest and principal will not be received in accordance with the original contractual terms of the loan agreement. Some loan modifications classified as TDRs may not ultimately result in the full collection of principal and interest, as modified, but may give rise to potential incremental losses. We measure impairments using a discounted cash flow method for performing TDRs and measure impairment based on collateral values for collateral-dependent nonperforming TDRs.
Allowance for Credit Losses on Loans, Credit Losses, and Reserve for Unfunded Commitments	Allowance for Credit Losses on Loans The ACL represents Management's estimate of expected lifetime losses in our LHFI portfolio, excluding loans carried under the fair value option. In addition, we record a reserve for expected lifetime losses on our unfunded commitments - see Reserve for Unfunded Commitments section below. Therefore, we record ALLL on relevant financial assets and a reserve for unfunded commitments on our Consolidated Statements of Financial Condition, collectively referred to as the ACL. Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual terms excludes expected extensions, renewals, and modifications unless either of the following applies: Management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by us. The ACL is impacted by changes in asset quality of the portfolio, including but not limited to increases in risk rating changes in our commercial portfolio, borrower delinquencies, changes in FICO scores or changes in LTVs in our consumer portfolio. In addition, while we have incorporated our forecasted impact of COVID-19 into our ACL, the ultimate impact of COVID-19 is still uncertain, including how long economic activity will be impacted by the pandemic and what effect the unprecedented levels of government fiscal and monetary actions will have on the economy and our credit losses. Specifically identified component. The specifically identified component of the ACL related to performing TDR loans is generally measured as the difference between the recorded investment in the specific loan and the present value of the cash flows expected to be collected, discounted at the loan’s original effective interest rate. Estimating the timing and amounts of future cash flow projections is highly judgmental and based upon assumptions including default rates, prepayment probability and loss severities. All of these estimates and assumptions require significant management judgment and certain assumptions are highly subjective. Specifically identified collateral dependent NPL loans are generally measured as the difference between the recorded investment in the impaired loan and the underlying collateral value less estimated costs to sell. These estimates are dependent on third-party property valuations which may be influenced by factors such as the current and future level of home prices, the duration of current overall economic conditions, and other macroeconomic and portfolio-specific factors. Model-based component. A general allowance is established for expected lifetime losses on non-impaired loans by segmenting the portfolio based upon common risk characteristics. Our consumer loan portfolio is broadly segmented into Residential First Mortgage, Home Equity and Other Consumer. Risks for these segments include lien position, credit quality, and loan structure. Our commercial loans are broadly segmented into Commercial Real Estate, Commercial and Industrial, and Warehouse Lending. Risks for these segments include credit quality and loan structure. The general allowance is determined using dual risk rating models which use probability of default, loss given default and exposure at default. These models incorporate macroeconomic forecast scenarios applied over a 2-year reasonable and supportable forecast period. After this forecast period, we revert on a straight-line basis over a 1-year period to historical averages which are utilized for the remaining contractual life, adjusted for expected prepayments and borrower controlled extension options. The macroeconomic scenarios include variables that, based on historical analysis, have been key drivers of increases and decreases in credit losses. These variables include unemployment rates, real estate prices, and gross domestic product levels. Qualitative adjustments. The specifically identified component analysis and the output of the model provide a reasonable starting point for our analysis, but do not, by themselves, form a sufficient basis to determine the appropriate level for the ACL. We therefore consider the qualitative factors that are likely to cause the ACL associated with our existing portfolio to differ from the output of the model. The most significant qualitative factors considered include changes in economic and business conditions, changes in nature and volume of portfolio and changes in the volume and severity of past due loans. The application of different inputs into the model calculation and the assumptions used by Management to adjust the model calculation are subject to significant management judgment and may result in actual credit losses that differ from the originally estimated amounts. Credit Losses Consumer loans secured by real estate are charged-off to the estimated fair value of the collateral when a loss is confirmed or at 180 days past due, whichever is sooner. Loss confirming events include, but are not limited to, bankruptcy (unsecured), continued delinquency, foreclosure or receipt of an asset valuation indicating a collateral deficiency and the asset is the sole source of repayment. For consumer loans not secured by real estate, the charge-off is taken upon the earlier of the confirmation of a loss or 120 days past due. Commercial loans are evaluated on a loan level basis and either charged-off or written down to net realizable value if a loss confirming event has occurred. Loss confirming events include, but are not limited to, bankruptcy (unsecured), continued delinquency, foreclosure, or receipt of an asset valuation indicating a collateral deficiency and that asset is the sole source of repayment. Recoveries of past charge-offs are credited to the allowance for previously charged-off principal, interest and expenses after principal, interest, and fees of the loan are collected. Reserve for Unfunded Commitments We estimate expected credit losses over the contractual period in which we are exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by us. The ACL on unfunded commitments is adjusted as a provision for credit loss expense within the provision (benefit) for credit losses on the Consolidated Statements of Operations and is recorded in other liabilities on the Consolidated Statements of Financial Condition. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. The reserve for unfunded commitments is included in other liabilities on the Consolidated Statements of Financial Condition.
Transfers of Financial Assets	Transfers of Financial Assets    Our recognition of gain or loss on the sale of loans for which we surrender control is accounted for as a sale to the extent that 1) the transferred assets are legally isolated from us or our consolidated affiliates, even in bankruptcy or other receivership, 2) the transferee has the right to pledge or exchange the assets with no conditions that constrain the transferee and provide more than a trivial benefit to the Company and 3) we do not maintain the obligation or unilateral ability to reclaim or repurchase the assets. If the sale criteria are met, the transferred financial assets are removed from the Consolidated Statements of Financial Condition and a gain or loss on sale is recognized.
Variable Interest Entities	Variable Interest Entities
Repossessed Assets	Repossessed Assets    Repossessed assets include one-to-four family residential property, commercial property and one-to-four family homes under construction that were acquired through foreclosure or acceptance of a deed-in-lieu of foreclosure. Repossessed assets are initially recorded in other assets at the estimated fair value of the collateral less estimated costs to sell. Losses arising from the initial acquisition of such properties are charged against the allowance for loan losses at the time of transfer. Subsequent valuation adjustments to reflect fair value, as well as gains and losses on disposal of these properties, are charged to other noninterest expense within noninterest expense in the Consolidated Statements of Operations as incurred. For further information, see Note 6 - Repossessed Assets and Note 20 - Fair Value Measurements.
Loans with Government Guarantees	Loans with Government Guarantees We originate government guaranteed loans which are pooled and sold as Ginnie Mae MBS. Pursuant to Ginnie Mae servicing guidelines, we have the unilateral right to repurchase loans securitized in Ginnie Mae pools that are due, but unpaid, for three consecutive months. As a result, once the delinquency criteria have been met, and regardless of whether the repurchase option has been exercised, we account for the loans as if they had been repurchased. We recognize the loans and corresponding liability as loans with government guarantees and loans with government guarantees repurchase options, respectively, in the Consolidated Statements of Financial Condition. If the loan is repurchased, the liability is cash settled and the loan with government guarantee remains. Once repurchased, we may recover losses through a claims process with the government agency, as an approved lender.
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock    We own stock in the FHLB of Indianapolis, as required to permit us to obtain membership in and to borrow from the FHLB. The stock is redeemable at par and is carried at cost as no market quotes exist for the stock.
Premises and Equipment	Premises and Equipment Premises and equipment are carried at cost less accumulated depreciation. Land is carried at cost. Depreciation is calculated on a straight-line basis over the estimated useful lives of the assets, which generally ranges from three
Goodwill and Intangible Assets	Goodwill and Intangible Assets The excess of the cost of an acquisition over the fair value of the net assets acquired consists primarily of goodwill, core deposit intangibles and other identifiable intangible assets. Goodwill is not amortized, but rather tested annually for impairment, or more frequently as events occur or circumstances change that would indicate the fair value is below the carrying amount. The Company may assess qualitative factors to determine whether it is more-likely-than-not the fair value is less than its carrying amount. If the Company concludes based on the qualitative assessment that goodwill may be impaired, a quantitative one-step impairment test would then be applied. An impairment loss would be recognized for any excess of carrying value over the fair value of the goodwill.
Mortgage Servicing Rights	Mortgage Servicing R ights We purchase and originate mortgage loans for sale to the secondary market and sell the loans on either a servicing-retained or servicing-released basis. If we retain the right to service the loan, an MSR is created at the time of sale which is recorded at fair value. We use an internal valuation model that utilizes an option-adjusted spread, constant prepayment speeds, costs to service and other assumptions to determine the fair value of MSRs. Management obtains third-party valuations of the MSR portfolio on a quarterly basis from independent valuation services to assess the reasonableness of the fair value calculated by our internal valuation model. Changes in the fair value of our MSRs are reported on the Consolidated Statements of Operations in net return on mortgage servicing. For further information, see Note 10 - Mortgage Servicing Rights and Note 20 - Fair Value Measurements.
Leases	Leases Effective January 1, 2019, we adopted the requirements of ASU 2016-02, Leases (Topic 842) and all related amendments. The Company elected to apply the practical expedient of forgoing the restatement of comparative periods. In addition, we elected the practical expedients permitted under transition guidance to not reassess leases entered into prior to adoption. As permitted under ASC 842, the Company made an accounting policy election to exempt leases with an initial term of twelve months or less from balance sheet recognition. Instead, short-term leases are expensed over the lease term with no impact to the balance sheet.
Servicing Fee Income	Servicing Fee Income    Servicing fee income, late fees and ancillary fees received on loans for which we own the MSR are included in net return on mortgage servicing rights on the Consolidated Statements of Operations. The fees are based on the outstanding principal and are recorded as income when earned. Subservicing fees, which are included in loan administration income on the Consolidated Statements of Operations, are based on a contractual monthly amount per loan including late fees and other ancillary income.
Revenue from Contract with Customer	Revenue from Contracts with Customers Under the guidance of the Revenue from Contracts with Customers (Topic 606), an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration received in exchange for those goods or services. Revenue is recognized when obligations, under the terms of a contract with our customer, are satisfied, which generally occurs when services are performed. Revenue is measured as the amount of consideration we expect to receive in exchange for providing services. The disaggregation of our revenue from contracts with customers is provided below: For the Years Ended December 31, Location of Revenue (1) 2020 2019 (Dollars in millions) Deposit account and other banking income Deposit fees and charges $ 21 $ 27 Debit card interchange fees Deposit fees and charges 11 11 Credit card interchange fees Other noninterest income 1 2 Wealth management Other noninterest income 8 6 Total $ 41 $ 46 (1) Recognized within the Community Banking segment. Deposit account and other banking income - We charge depositors various deposit account service fees including those for outgoing wires, overdrafts, stop payments, and ATM fees. These fees are generated from a depositor’s option to purchase services offered under the contract and are only considered a contract when the depositor exercises their option to purchase these account services. Therefore, we deem the term of our contracts with depositors to be day-to-day and do not extend beyond the services already provided. Deposit account and other banking fees are recorded at the point in time we perform the requested service. Interchange income - We collect interchange fee income when debit cards that we have issued to our customers, are used in merchant transactions. Our performance obligation is satisfied and revenue is recognized at the point we initiate the payment of funds from a customer’s account to a merchant account. Merchant fee income - We receive a percentage of merchant fees based upon card transactions processed through point-of-sale terminals at referred merchant locations. Our performance obligation is satisfied when our referral of a merchant to a payment processing vendor results in an executed agreement between the merchant and the vendor. Merchant fee revenue is recognized as received. Wealth management revenue - We earn commission income through a revenue share program based on a tiered percentage of total gross commissions generated from the sales of investment and insurance services to Flagstar customers. Commissions are earned and our performance obligation has been satisfied at the point of sale or trade execution. Our portion of earned commissions is calculated, paid and recognized as revenue on a monthly basis. We also earn revenue from portfolio management services. We receive payment in advance for portfolio management services at the beginning of each quarter for services to be performed over the quarter which results an insignificant revenue liability. We recognize this revenue over the quarter on a straight-line basis, as we believe this is the most appropriate method to measure progress towards satisfaction of the performance obligation.
Derivatives	Derivatives We utilize derivative instruments to manage the fair value changes in our MSRs, interest rate lock commitments and LHFS portfolio which are exposed to price and interest rate risk; facilitate asset/liability management; minimize the variability of future cash flows on long-term debt; and to meet the needs of our customers. All derivatives are recognized on the Consolidated Statements of Financial Condition as other assets and liabilities, as applicable, at their estimated fair value. For those derivatives designated as qualified cash flow hedges, changes in the fair value of the derivatives, to the extent effective as a hedge, are recorded in accumulated other comprehensive income, net of income taxes, and reclassified into earnings concurrently with the earnings of the hedged item. For derivative instruments designated as qualified fair value hedges, which are used to hedge the exposure of fair value changes of an asset or liability attributable to a particular risk, the gain or loss on the derivative instrument, as well as the offsetting gain or loss on the hedged item attributable to the hedged risk, are recognized in current earnings during the period. For all other derivatives, changes in the fair value of the derivative are recognized immediately in earnings. A majority of these derivatives are subject to master netting agreements and cleared through a Central Counterparty Clearing House, which mitigates non-performance risk with counterparties and enables us to settle activity on a net basis. We use interest rate swaps, swaptions, futures and forward loan sale commitments to mitigate the impact of fluctuations in interest rates and interest rate volatility on the fair value of the MSRs. Changes in their fair value are reflected in current period earnings under the net return on mortgage servicing asset. These derivatives are valued based on quoted prices for similar assets in an active market with inputs that are observable. We also enter into various derivative agreements with customers and correspondents in the form of interest rate lock commitments and forward purchase contracts which are commitments to originate or purchase mortgage loans whereby the interest rate on the loan is determined prior to funding and the customers have locked into that interest rate. The derivatives are valued using internal models that utilize market interest rates and other unobservable inputs. Changes in the fair value of these commitments due to fluctuations in interest rates are economically hedged through the use of forward loan sale commitments of MBS. The gains and losses arising from this derivative activity are reflected in current period earnings under the net gain on loan sales. We may utilize interest rate swaps to hedge the forecasted cash flows from our underlying variable-rate FHLB advances and forecasted FHLB advances in qualifying cash flow hedge accounting relationships. Changes in the fair value of derivatives designated as cash flow hedges are recorded in other comprehensive income on the Consolidated Statement of Financial Condition and reclassified into interest expense concurrently with the interest expense on the debt. Interest rate swaps are valued based on quoted prices for similar assets in an active market with inputs that are observable. These hedges are evaluated for effectiveness using regression analysis at the time they are designated and then qualitatively throughout the remaining hedge period unless a change in facts and circumstances is identified. For forecasted FHLB advances being hedged, we evaluate the likelihood of the transaction occurring based on the current facts and circumstances each reporting period to ensure the hedge relationship still qualifies for hedge accounting. If we de-designate a hedge relationship or determine that an interest rate swap no longer qualifies for hedge accounting, changes in fair value are no longer recorded in other comprehensive income. The effective amounts previously recorded in other comprehensive income are recognized in earnings over the remaining life of the hedged item as an adjustment to yield, unless the point it is determined that the underlying transaction is probable to not occur, at which point it is reclassified immediately into earnings. We utilize interest rate swaps to manage fair value changes of our fixed-rate FHLB advances, certain HFI residential first mortgages and certain AFS securities in qualifying fair value hedge accounting relationships. Interest rate swaps are valued based on quoted prices for similar assets in an active market with inputs that are observable. Changes in the fair value of derivatives designated as fair value hedges, and changes in value attributable to the benchmark interest rate of the hedged item, are recognized in current period earnings and as a basis adjustment to the hedged item and hedging instrument. These hedges are evaluated for effectiveness using regression analysis at the time they are designated and then qualitatively throughout the hedge period unless a change in facts and circumstances is identified. If the Company determines an interest rate swap no longer qualifies for fair value hedge accounting or is de-designated, the hedged item will no longer be adjusted for changes in fair value and the amounts previously recorded as a basis adjustment are recognized in earnings over the remaining life of the hedged item as an adjustment to yield. If a previously hedged item is extinguished or sold, the remaining basis adjustment of the hedged item for prior fair value hedges will be reclassified to current period earnings.
Income Taxes	Income Taxes    Current income tax expense represents our estimated taxes to be paid or refunded for the current period. Deferred taxes are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. DTAs and liabilities are measured using enacted tax rates that will apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on DTAs and liabilities of a change in tax rates is recognized as income or expense in the period that includes the enactment date. We evaluate our DTAs to determine if, based on all available evidence, it is more likely than not that they will be realized. If it is determined that it is more likely than not that the deferred taxes will not be realized, we establish a valuation allowance. For further information, see Note 17 - Income Taxes.
Representation and Warranty Reserve	Representation and Warranty Reserve    When we sell mortgage loans into the secondary mortgage market, we make customary representations and warranties to the purchasers about various characteristics of each loan. Upon the sale of a loan, we recognize a liability for that guarantee at its fair value as a reduction of our net gain on loan sales. Subsequent to the sale, the liability is re-measured on an ongoing basis based upon an estimate of probable future losses.
Advertising Costs	Advertising Costs    Advertising costs are expensed in the period they are incurred and are included as part of other noninterest expense in the Consolidated Statements of Operations.
Stock-based Compensation	Stock-Based Compensation    All share-based payments to employees, including restricted stock units, are classified as equity with expenses being recognized in compensation and benefits in the Consolidated Statements of Operations based on their fair values. The amount of compensation is measured at the grant date and is expensed over the requisite service period, which is normally the vesting period with forfeitures being recognized as they occur. In addition to share-based payments to employees, the discount provided to employees through the Employee Stock Purchase Plan is also recognized as stock-based compensation.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Adoption of New Accounting Standards The following ASUs have been adopted which impact our accounting policies and/or have a financial impact: Credit Losses - In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326), which alters the current method for recognizing credit losses within the reserve account. The new guidance requires financial assets recorded at amortized cost to be presented at the net amount expected to be collected (i.e. net of expected credit losses). The measurement of current expected credit losses should be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. Effective January 1, 2020, we have adopted the requirements of ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) and all related amendments using the modified retrospective method for all financial assets measured at amortized cost, net investments in leases and unfunded commitments. Results for reporting periods beginning after January 1, 2020 are presented under ASC 326 while prior period amounts continue to be reported in accordance with previously applicable GAAP. We recorded a net decrease to retained earnings of $23 million as of January 1, 2020 for the cumulative effect of adopting ASC 326. The following table illustrates the impact of adopting ASC 326: January 1, 2020 Pre-ASC 326 Adoption Impact of ASC 326 Adoption As Reported Under ASC 326 (Dollars in millions) Assets: Allowance for loan losses $ 107 $ 23 $ 130 Liabilities: Reserve for unfunded commitments $ 3 $ 7 $ 10 We adopted the following ASUs during 2020, none of which had a material impact to our financial statements: Standard Description Effective Date ASU 2020-10 Codification Improvements December 15, 2020 ASU 2020-08 Codification Improvements to Subtopic 310-20, Receivables-Nonrefundable Fees and Other Costs December 15, 2020 ASU 2020-06 Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity September 1, 2020 ASU 2020-04 Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting March 12, 2020 ASU 2020-03 Codification Improvements to Financial Instruments January 1, 2020 ASU 2020-02 Financial Instruments-Credit Losses (Topic 326) and Leases (Topic 842)-Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842) ( SEC Update) February 6, 2020 ASU 2018-15 Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force) January 1, 2020 ASU 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement January 1, 2020 ASU 2017-04 Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment January 1, 2020 Accounting Standards Issued But Not Yet Adopted The following ASUs have been issued and are not expected to have a material impact on our Consolidated Financial Statements and/or significant accounting policies upon implementation: Standard Description Effective Date ASU 2019-12 Simplifying the Accounting for Income Taxes January 1, 2021
Fair Value Measurements	Fair Value Measurements We utilize fair value measurements to record or disclose the fair value on certain assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability through an orderly transaction between market participants at the measurement date. The determination of fair values of financial instruments often requires the use of estimates. In cases where quoted market values in an active market are not available, we use present value techniques and other valuation methods to estimate the fair values of our financial instruments. These valuation models rely on market-based parameters when available, such as interest rate yield curves or credit spreads. Unobservable inputs may be based on Management's judgment, assumptions and estimates related to credit quality, our future earnings, interest rates and other relevant inputs. These valuation methods require considerable judgment and the resulting estimates of fair value can be significantly affected by the assumptions made and methods used. Valuation Hierarchy U.S. GAAP establishes a three-level valuation hierarchy for disclosure of fair value measurements. The hierarchy is based on the transparency of the inputs used in the valuation process with the highest priority given to quoted prices available in active markets and the lowest priority given to unobservable inputs where no active market exists, as discussed below: Level 1 - Quoted prices (unadjusted) for identical assets or liabilities in active markets in which we can participate as of the measurement date, Level 2 - Quoted prices for similar instruments in active markets and other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument, and Level 3 - Unobservable inputs that reflect our own assumptions about the assumptions that market participants would use in pricing an asset or liability. A financial instrument's categorization within the valuation hierarchy is based upon the lowest level of input within the valuation hierarchy that is significant to the overall fair value measurement. Transfers between levels of the fair value hierarchy are recognized at the end of the reporting period.

Description of Business, Basi_3

Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Information Related to Operating Lease	The following table reflects information relating to our operating leases: December 31, 2020 (Dollars in millions) Operating Leases (1) Weighted-average remaining lease term (years) 3.64 Weighted-average discount rate 1.85 % Right-of-use asset (2) $ 23 Lease liability (3) $ 23 (1) Lease expense on operating leases includes a de-minimis amount of short-term lease expense and variable lease expense. (2) Recorded in premises and equipment on the Consolidated Statements of Financial Condition. (3) Recorded in other liabilities
Schedule of Minimum Contractual Lease Obligations	The following table presents our undiscounted cash flows on our operating lease liabilities as of December 31, 2020 and our minimum contractual obligations on our operating leases as of December 31, 2019: December 31, 2020 December 31, 2019 (Dollars in millions) Within one year $ 9 $ 9 After one year and within two years 8 7 After two years and within three years 5 5 After three years and within four years 3 3 After four years and within five years 2 1 After five years 1 2 Total (1) $ 28 $ 27 (1) The difference between the total undiscounted cash payments on operating leases and the lease liability is solely the effect of discounting.
Disaggregation of Revenue	The disaggregation of our revenue from contracts with customers is provided below: For the Years Ended December 31, Location of Revenue (1) 2020 2019 (Dollars in millions) Deposit account and other banking income Deposit fees and charges $ 21 $ 27 Debit card interchange fees Deposit fees and charges 11 11 Credit card interchange fees Other noninterest income 1 2 Wealth management Other noninterest income 8 6 Total $ 41 $ 46 (1) Recognized within the Community Banking segment.
Schedule of Adoption of New Accounting Standards and Accounting Standards Issued But Not Yet Adopted	The following table illustrates the impact of adopting ASC 326: January 1, 2020 Pre-ASC 326 Adoption Impact of ASC 326 Adoption As Reported Under ASC 326 (Dollars in millions) Assets: Allowance for loan losses $ 107 $ 23 $ 130 Liabilities: Reserve for unfunded commitments $ 3 $ 7 $ 10 Standard Description Effective Date ASU 2020-10 Codification Improvements December 15, 2020 ASU 2020-08 Codification Improvements to Subtopic 310-20, Receivables-Nonrefundable Fees and Other Costs December 15, 2020 ASU 2020-06 Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity September 1, 2020 ASU 2020-04 Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting March 12, 2020 ASU 2020-03 Codification Improvements to Financial Instruments January 1, 2020 ASU 2020-02 Financial Instruments-Credit Losses (Topic 326) and Leases (Topic 842)-Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842) ( SEC Update) February 6, 2020 ASU 2018-15 Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force) January 1, 2020 ASU 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement January 1, 2020 ASU 2017-04 Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment January 1, 2020 Standard Description Effective Date ASU 2019-12 Simplifying the Accounting for Income Taxes January 1, 2021

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule of Held-to-maturity and Available-for-sale Securities	The following table presents our investment securities: Amortized Cost Gross Unrealized Gross Unrealized Fair Value (Dollars in millions) December 31, 2020 Available-for-sale securities Agency - Commercial $ 1,018 $ 43 $ — $ 1,061 Agency - Residential 707 28 — 735 Corporate debt obligations 75 2 — 77 Municipal obligations 27 1 — 28 Other MBS 42 — — 42 Certificate of deposit 1 — — 1 Total available-for-sale securities (1) $ 1,870 $ 74 $ — $ 1,944 Held-to-maturity securities Agency - Commercial $ 193 $ 7 $ — $ 200 Agency - Residential 184 9 — 193 Total held-to-maturity securities (1) $ 377 $ 16 $ — $ 393 December 31, 2019 Available-for-sale securities Agency - Commercial $ 948 $ 2 $ (3) $ 947 Agency - Residential 1,015 4 (4) 1,015 Corporate debt obligations 76 1 — 77 Municipal obligations 31 — — 31 Other MBS 44 1 — 45 Certificate of deposit 1 — — 1 Total available-for-sale securities (1) $ 2,115 $ 8 $ (7) $ 2,116 Held-to-maturity securities Agency - Commercial $ 306 $ — $ (1) $ 305 Agency - Residential 292 3 (1) 294 Total held-to-maturity securities (1) $ 598 $ 3 $ (2) $ 599 (1) There were no securities of a single issuer, which are not governmental or government-sponsored, that exceeded 10 percent of stockholders’ equity at December 31, 2020 or December 31, 2019 .
Summary of Unrealized Loss Positions on Investment Securities Available-for-Sale	The following table summarizes the unrealized loss positions on available-for-sale and held-to-maturity investment securities, by duration of the unrealized loss: Unrealized Loss Position with Duration Unrealized Loss Position with Duration Fair Number of Unrealized Fair Number of Unrealized (Dollars in millions) December 31, 2020 Available-for-sale securities Agency - Commercial $ 3 1 $ — $ 7 2 $ — Agency - Residential — — — — 1 — Corporate debt obligations — — — 10 3 — Other mortgage-backed securities — — — — 1 — Held-to-maturity securities Agency - Residential — — — 2 3 — December 31, 2019 Available-for-sale securities Agency - Commercial $ 148 17 $ (3) $ 303 19 $ — Agency - Residential 266 26 (3) 148 14 (1) Municipal obligations 8 3 — — — — Held-to-maturity securities Agency - Commercial $ 148 13 $ (1) $ 85 6 $ — Agency - Residential 35 7 (1) 38 10 —
Summary of Unrealized Loss Positions on Investment Securities Held-to-Maturity	The following table summarizes the unrealized loss positions on available-for-sale and held-to-maturity investment securities, by duration of the unrealized loss: Unrealized Loss Position with Duration Unrealized Loss Position with Duration Fair Number of Unrealized Fair Number of Unrealized (Dollars in millions) December 31, 2020 Available-for-sale securities Agency - Commercial $ 3 1 $ — $ 7 2 $ — Agency - Residential — — — — 1 — Corporate debt obligations — — — 10 3 — Other mortgage-backed securities — — — — 1 — Held-to-maturity securities Agency - Residential — — — 2 3 — December 31, 2019 Available-for-sale securities Agency - Commercial $ 148 17 $ (3) $ 303 19 $ — Agency - Residential 266 26 (3) 148 14 (1) Municipal obligations 8 3 — — — — Held-to-maturity securities Agency - Commercial $ 148 13 $ (1) $ 85 6 $ — Agency - Residential 35 7 (1) 38 10 —
Schedule of Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity	The following table shows the amortized cost and estimated fair value of securities by contractual maturity: Investment Securities Available-for-Sale Investment Securities Held-to-Maturity Amortized Fair Weighted-Average Amortized Fair Weighted-Average (Dollars in millions) December 31, 2020 Due in one year or less $ 5 $ 5 2.22 % $ — $ — — % Due after one year through five years 9 10 2.83 % 7 8 2.44 % Due after five years through 10 years 123 127 3.95 % 7 8 2.37 % Due after 10 years 1,733 1,802 2.34 % 363 377 2.41 % Total $ 1,870 $ 1,944 $ 377 $ 393 (1) Weighted-average yields are based on amortized cost weighted for the contractual maturity of each security.

Loans Held-for-Investment (Tabl

Loans Held-for-Investment (Tables)	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Summary of Loans Held-for-Investment and UPB of Loan Sales and Purchases in the Loans Held-for-Investment Portfolio	The following table presents our LHFI: December 31, 2020 December 31, 2019 (Dollars in millions) Consumer loans Residential first mortgage $ 2,266 $ 3,154 Home equity 856 1,024 Other 1,004 729 Total consumer loans 4,126 4,907 Commercial loans Commercial real estate 3,061 2,828 Commercial and industrial 1,382 1,634 Warehouse lending 7,658 2,760 Total commercial loans 12,101 7,222 Total loans held-for-investment $ 16,227 $ 12,129 The following table presents the UPB of our loan sales and purchases in the LHFI portfolio: For the Year Ended December 31, 2020 2019 2018 (Dollars in millions) Loans Sold (1) Performing loans $ 492 $ 217 $ 158 Total loans sold $ 492 $ 217 $ 158 Net gain associated with loan sales (2) $ 3 $ 2 $ 2 Loans Purchased Residential $ — $ — $ 3 Home equity — 249 — Other consumer (3) 63 51 34 Total loans purchased $ 63 $ 300 $ 37 Premium associated with loans purchased $ — $ 11 $ — (1) Upon a change in our intent, the loans were transferred to LHFS and subsequently sold. (2) Recorded in net gain on loan sales on the Consolidated Statement of Operations. (3) Does not include point of sale flow consumer loans.
Schedule of Changes in ALLL and Method of Evaluation by Class of Loan	The following table presents changes in the allowance for loan losses, by class of loan: Residential Home Equity Other Commercial Commercial Warehouse Total (Dollars in millions) Year Ended December 31, 2020 Beginning balance, prior to adoption of ASC 326 $ 22 $ 14 $ 6 $ 38 $ 22 $ 5 $ 107 Impact of adopting ASC 326 25 12 10 (14) (6) (4) 23 Provision (benefit) 8 (2) 26 60 36 3 131 Charge-offs (6) (3) (5) — (1) — (15) Recoveries — 4 2 — — — 6 Ending allowance balance $ 49 $ 25 $ 39 $ 84 $ 51 $ 4 $ 252 Year Ended December 31, 2019 Beginning balance $ 38 $ 15 $ 3 $ 48 $ 18 $ 6 $ 128 Provision (benefit) (14) (1) 10 (10) 34 (1) 18 Charge-offs (3) (2) (7) — (31) — (43) Recoveries 1 2 — — 1 — 4 Ending allowance balance $ 22 $ 14 $ 6 $ 38 $ 22 $ 5 $ 107 Year Ended December 31, 2018 Beginning balance $ 47 $ 22 $ 1 $ 45 $ 19 $ 6 $ 140 Provision (benefit) (7) (6) 3 3 (1) — (8) Charge-offs (4) (2) (2) — — — (8) Recoveries 2 1 1 — — — 4 Ending allowance balance $ 38 $ 15 $ 3 $ 48 $ 18 $ 6 $ 128 (1) Includes LGG.
Schedule of Aging Analysis of Past Due and Current Loans	The following table sets forth the LHFI aging analysis of past due and current loans (for further information on our policy for past due and impaired loans, see Note 1 - Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies): 30-59 Days 60-89 Days 90 Days or Total Current Total LHFI (3)(4)(5) (Dollars in millions) December 31, 2020 Consumer loans Residential first mortgage $ 4 $ 4 $ 31 $ 39 $ 2,227 $ 2,266 Home equity 1 1 5 7 849 856 Other 4 1 2 7 997 1,004 Total consumer loans 9 6 38 53 4,073 4,126 Commercial loans Commercial real estate 20 — 3 23 3,038 3,061 Commercial and industrial 1 — 15 16 1,366 1,382 Warehouse lending — — — — 7,658 7,658 Total commercial loans 21 — 18 39 12,062 12,101 Total loans (2) $ 30 $ 6 $ 56 $ 92 $ 16,135 $ 16,227 December 31, 2019 Consumer loans Residential first mortgage $ 5 $ 4 $ 21 $ 30 $ 3,124 $ 3,154 Home equity 1 — 4 5 1,019 1,024 Other 3 1 1 5 724 729 Total consumer loans 9 5 26 40 4,867 4,907 Commercial loans Commercial real estate — — — — 2,828 2,828 Commercial and industrial — — — — 1,634 1,634 Warehouse lending — — — — 2,760 2,760 Total commercial loans — — — — 7,222 7,222 Total loans (2) $ 9 $ 5 $ 26 $ 40 $ 12,089 $ 12,129 (1) Includes less than 90 days past due performing loans which are placed in nonaccrual. Interest is not being accrued on these loans. (2) Includes $8 million and $4 million of past due loans accounted for under the fair value option at December 31, 2020 and 2019, respectively. (3) Collateral dependent loans totaled $80 million at December 31, 2020 and $54 million at December 31, 2019, respectively. The majority of these loans are secured by real estate. (4) The interest income recognized on impaired loans was $2 million and less than $1 million at December 31, 2020 and December 31, 2019, respectively. (5) The delinquency status for loans in forbearance is frozen for loans at inception of the forbearance period and will resume when the borrower's forbearance period ends.
Summary of TDRs by Type and Performing Status and Newly Modified TDRs	The following table provides a summary of TDRs by type and performing status: TDRs Performing Nonperforming Total (Dollars in millions) December 31, 2020 Consumer loans Residential first mortgage $ 19 $ 8 $ 27 Home equity 12 2 14 Total consumer TDR loans 31 10 41 Commercial Loans Commercial real estate 5 — 5 Commercial and industrial — — — Total commercial TDR loans 5 — 5 Total TDRs (1)(2) $ 36 $ 10 $ 46 December 31, 2019 Consumer loans Residential first mortgage $ 20 $ 8 $ 28 Home equity 18 2 20 Total TDRs (1)(2) $ 38 $ 10 $ 48 (1) The ALLL on TDR loans totaled $5 million and $8 million at December 31, 2020 and 2019, respectively. (2) Includes $3 million and $2 million of TDR loans accounted for under the fair value option at December 31, 2020 and 2019, respectively. The following table provides a summary of newly modified TDRs: New TDRs Number of Accounts Pre-Modification Post-Modification Increase (Decrease) in Allowance at Modification (Dollars in millions) Year Ended December 31, 2020 Residential first mortgages 9 $ 2 $ 2 $ — Home equity (2)(3) 3 — — — Other consumer 1 — — $ — Commercial real estate 1 5 5 $ — Total TDR loans 14 $ 7 $ 7 $ — Year Ended December 31, 2019 Residential first mortgages 8 $ 1 $ 1 $ — Home equity (2)(3) 6 — — — Total TDR loans 14 $ 1 $ 1 $ — Year Ended December 31, 2018 Residential first mortgages 14 $ 3 $ 3 $ — Home equity (2)(3) 17 1 1 — Total TDR loans 31 $ 4 $ 4 $ — (1) Post-modification balances include past due amounts that are capitalized at modification date. (2) Home equity post-modification UPB reflects write downs. (3) Includes loans carried at fair value option.
Schedule of Loan Credit Quality Indicators	The following table presents the amortized cost in residential and consumer loans based on payment activity: Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Total December 31, 2019 Term Loans Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Consumer Loans (Dollars in millions) Residential First Mortgage Pass $ 362 $ 544 $ 231 $ 289 $ 252 $ 420 $ 92 $ 15 $ 2,205 $ 3,107 Watch — 1 1 1 — 17 1 — 21 23 Substandard — 3 5 2 — 15 — — 25 15 Home Equity Pass 7 31 13 6 2 11 720 48 838 1,002 Watch — — — — — 11 2 — 13 16 Substandard — — — — — 1 1 1 3 3 Other Consumer Pass 292 321 145 3 1 6 227 5 1,000 727 Watch — — — — — — — 1 1 1 Substandard 1 1 1 — — — — — 3 1 Total Consumer Loans (1)(2) $ 662 $ 901 $ 396 $ 301 $ 255 $ 481 $ 1,043 $ 70 $ 4,109 $ 4,895 (1) Excludes loans carried under the fair value option. (2) The delinquency status for loans in forbearance are frozen for loans at inception of the forbearance period and will resume when the borrower's forbearance period ends. The following table presents the amortized cost in residential and consumer loans based on credit scores: Revolving Loans Converted to Term Loans Amortized Cost Basis FICO Band Revolving Loans Amortized Cost Basis Total Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Consumer Loans (Dollars in millions) Residential First Mortgage >750 $ 195 $ 272 $ 118 $ 193 $ 181 $ 231 $ 55 $ 6 $ 1,251 700-750 119 180 90 85 64 130 25 7 700 <700 48 96 29 14 7 91 13 2 300 Home Equity >750 2 9 6 2 1 7 324 13 364 700-750 3 12 4 3 1 8 289 20 340 <700 2 10 3 1 — 8 110 16 150 Other Consumer >750 209 205 80 2 1 5 213 6 721 700-750 79 107 55 1 — 1 9 — 252 <700 5 10 11 — — — 5 — 31 Total Consumer Loans (1) $ 662 $ 901 $ 396 $ 301 $ 255 $ 481 $ 1,043 $ 70 $ 4,109 (1) Excludes loans carried under the fair value option. Loan-to-value ratios primarily impact the allowance on mortgages within the consumer loan portfolio. The following table presents the amortized cost in residential first mortgages and home equity based on loan-to-value ratios: Revolving Loans Converted to Term Loans Amortized Cost Basis LTV Band Revolving Loans Amortized Cost Basis Total Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Consumer Loans (Dollars in millions) Residential first mortgage >90 $ 84 $ 260 $ 123 $ 35 $ 3 $ 19 $ — $ — $ 524 71-90 169 180 66 99 72 238 — — 824 55-70 83 60 22 82 96 122 — — 465 <55 26 48 26 76 81 73 93 15 438 Home Equity >90 — — — 1 1 10 — — 12 71-90 5 24 10 4 1 9 548 33 634 <=70 2 7 3 1 — 4 175 16 208 Total (1) $ 369 $ 579 $ 250 $ 298 $ 254 $ 475 $ 816 $ 64 $ 3,105 Based on the most recent credit analysis performed, the amortized cost basis, by risk category for each class of loans within the commercial portfolio, is as follows: Term Loans Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Total December 31, 2019 Amortized Cost Basis by Closing Year As of December 31, 2020 2020 2019 2018 2017 2016 Prior Commercial Loans (Dollars in million) Commercial real estate Pass $ 347 $ 993 $ 439 $ 438 $ 308 $ 280 $ — $ — $ 2,805 $ 2,794 Watch 21 19 35 51 21 19 — — 166 24 Special mention 5 1 16 — 17 14 — — 53 5 Substandard — 11 1 25 — — — — 37 5 Commercial and industrial Pass 319 425 163 149 54 71 19 — 1,200 1,533 Watch 3 48 28 25 — 2 — — 106 72 Special mention 1 — 14 9 — — — — 24 24 Substandard 22 11 15 4 — — — — 52 5 Warehouse Pass 7,398 — — — — — — — 7,398 2,556 Watch 260 — — — — — — — 260 189 Special mention — — — — — — — — — 15 Substandard — — — — — — — — — — Total commercial loans $ 8,376 $ 1,508 $ 711 $ 701 $ 400 $ 386 $ 19 $ — $ 12,101 $ 7,222

Repossessed Assets (Tables)

Repossessed Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Repossessed Assets [Abstract]
Summary of Repossessed Assets	Repossessed assets include the following: December 31, 2020 2019 (Dollars in millions) One-to-four family properties $ 4 $ 6 Commercial properties 4 4 Total repossessed assets $ 8 $ 10
Activity in Repossessed Assets	The following schedule provides the activity for repossessed assets: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Beginning balance $ 10 $ 7 $ 8 Additions, net 8 12 10 Disposals (7) (4) (8) Net write down on disposal (3) (5) (3) Ending balance $ 8 $ 10 $ 7

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of Premises and Equipment and Estimated Useful Lives	The following presents our premises and equipment balances and estimated useful lives: Estimated December 31, 2020 2019 (Dollars in millions) Land N/A $ 68 $ 73 Computer hardware and software 3 - 7 years 410 372 Office buildings and improvements 15 - 31.5 years 195 191 Furniture, fixtures and equipment 5 - 10 years 66 68 Leased equipment 3 - 10 years 19 36 Leasehold improvements 5 - 10 years 10 9 Fixed assets in progress (1) N/A 43 40 Right-of-use asset N/A 23 22 Total 834 811 Less: accumulated depreciation (442) (395) Premises and equipment, net $ 392 $ 416

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2020
Transfers and Servicing [Abstract]
Schedule of Changes in the Fair Value of Residential First Mortgage MSRs	Changes in the fair value of residential first mortgage MSRs were as follows: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Balance at beginning of period $ 291 $ 290 $ 291 Additions from loans sold with servicing retained 268 223 356 Reductions from sales (71) (57) (339) Decrease in MSR fair value due to pay-offs, pay-downs, run-off, model changes, and other (1) (109) (89) (20) Changes in estimates of fair value due to interest rate risk (1) (2) (50) (76) 2 Fair value of MSRs at end of period $ 329 $ 291 $ 290 (1) Changes in fair value are included within net return on mortgage servicing rights on the Consolidated Statements of Operations. (2) Represents estimated MSR value change resulting primarily from market-driven changes which we manage through the use of derivatives.
Summary of Adverse Changes to Weighted-Average Assumptions on the Fair Value of Servicing Rights	The following table summarizes the hypothetical effect on the fair value of servicing rights using adverse changes of 10 percent and 20 percent to the weighted average of certain significant assumptions used in valuing these assets: December 31, 2020 December 31, 2019 Fair value Fair value Actual 10% adverse change 20% adverse change Actual 10% adverse change 20% adverse change (Dollars in millions) Option adjusted spread 7.98 % $ 321 $ 313 5.34 % $ 284 $ 280 Constant prepayment rate 10.53 % 305 283 10.59 % 271 257 Weighted average cost to service per loan $ 81.24 325 321 $ 84.41 285 282
Summary of Income and Fees	The following table summarizes income and fees associated with owned MSRs: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Net return on mortgage servicing rights Servicing fees, ancillary income and late fees (1) $ 107 $ 96 $ 65 Decrease in MSR fair value due to pay-offs, pay-downs, run-off, model changes and other (109) (89) (20) Changes in fair value due to interest rate risk (50) (76) 2 Gain (loss) on MSR derivatives (2) 65 76 (5) Net transaction costs (3) (1) (6) Total return (loss) included in net return on mortgage servicing rights $ 10 $ 6 $ 36 (1) Servicing fees are recorded on an accrual basis. Ancillary income and late fees are recorded on a cash basis. (2) Changes in the derivatives utilized as economic hedges to offset changes in fair value of the MSRs. The following table summarizes income and fees associated with our mortgage loans subserviced for others: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Loan administration income on mortgage loans subserviced Servicing fees, ancillary income and late fees (1) $ 126 $ 106 $ 54 Charges on subserviced custodial balances (2) (29) (67) (29) Other servicing charges (13) (9) (2) Total income on mortgage loans subserviced, included in loan administration $ 84 $ 30 $ 23 (1) Servicing fees are recorded on an accrual basis. Ancillary income and late fees are recorded on a cash basis.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Financial Instruments	The following tables present the notional amount, estimated fair value and maturity of our derivative financial instruments: December 31, 2020 (1) Notional Amount Fair Value (2) Expiration Dates (Dollars in millions) Derivatives in cash flow hedge relationships Liabilities Interest rate swaps on custodial deposits $ 800 $ 1 2026-2027 Derivatives in fair value hedge relationships Liabilities Interest rate swaps on HFI residential first mortgages 100 — 2024 Interest rate swaps on AFS securities 450 — 2022-2025 Total hedge accounting swaps $ 1,350 $ 1 Derivatives not designated as hedging instruments Assets Futures $ 1,346 $ — 2021-2023 Mortgage-backed securities forwards 749 14 2021 Rate lock commitments 10,587 208 2021 Interest rate swaps and swaptions 1,481 59 2021-2051 Total derivative assets $ 14,163 $ 281 Liabilities Mortgage-backed securities forwards $ 11,194 $ 98 2021 Rate lock commitments 115 — 2021 Interest rate swaps and swaptions 1,305 4 2021-2030 Total derivative liabilities $ 12,614 $ 102 (1) Variation margin pledged to, or received from, a Central Counterparty Clearing House to cover the prior day's fair value of open positions is considered settlement of the derivative position for accounting purposes. (2) Derivative assets and liabilities are included in other assets and other liabilities on the Consolidated Statements of Financial Condition, respectively. December 31, 2019 (1) Notional Amount Fair Value (2) Expiration Dates (Dollars in millions) Derivatives in fair value hedge relationships Assets Interest rate swaps on FHLB advances $ 200 $ — 2020 Interest rate swaps on AFS securities 100 — 2022 Total derivative assets $ 300 $ — Derivatives not designated as hedging instruments Assets Futures $ 550 $ — 2020-2023 Mortgage-backed securities forwards 1,918 2 2020 Rate lock commitments 3,870 34 2020 Interest rate swaps 799 26 2020-2029 Total derivative assets $ 7,137 $ 62 Liabilities Mortgage-backed securities forwards $ 5,749 $ 9 2020 Rate lock commitments 229 1 2020 Interest rate swaps and swaptions 1,662 8 2020-2050 Total derivative liabilities $ 7,640 $ 18 (1) Variation margin pledged to, or received from, a Central Counterparty Clearing House to cover the prior day's fair value of open positions is considered settlement of the derivative position for accounting purposes.
Schedule of Derivatives Subject to a Master Netting Arrangement	The following tables present the derivatives subject to a master netting arrangement, including the cash pledged as collateral: Gross Amounts Netted in the Statements of Financial Position Net Amount Presented in the Statements of Financial Position Gross Amounts Not Offset in the Statements of Financial Position Gross Amount Financial Instruments Cash Collateral (Dollars in millions) December 31, 2020 Derivatives designated as hedging instruments Liabilities Interest rate swaps on AFS securities $ — $ — $ — $ — $ 5 Interest rate swaps on HFI residential first mortgages — — — — 1 Interest rate swaps on custodial deposits 1 — 1 — 8 Total derivative liabilities $ 1 $ — $ 1 $ — $ 14 Derivatives not designated as hedging instruments Assets Mortgage-backed securities forwards $ 14 $ — $ 14 $ — $ — Interest rate swaps 59 — 59 — 6 Total derivative assets $ 73 $ — $ 73 $ — $ 6 Liabilities Mortgage-backed securities forwards $ 98 $ — $ 98 $ — $ 68 Interest rate swaps and swaptions (1) 4 — 4 — 26 Total derivative liabilities $ 102 $ — $ 102 $ — $ 94 December 31, 2019 Derivatives not designated as hedging instruments Assets Mortgage-backed securities forwards $ 2 $ — $ 2 $ — $ — Interest rate swaps 26 — 26 — — Total derivative assets $ 28 $ — $ 28 $ — $ — Liabilities Mortgage-backed securities forwards $ 9 $ — $ 9 $ — $ 24 Interest rate swaps and swaptions (1) 8 — 8 — 39 Total derivative liabilities $ 17 $ — $ 17 $ — $ 63 (1) Variation margin pledged to, or received from, a Central Counterparty Clearing House to cover the prior days fair value of open positions is considered settlement of the derivative position for accounting purposes.
Schedule of Net Gain (Loss) Recognized in Income on Derivative Instruments	The following table presents the net gain (loss) recognized in income on derivative instruments, net of the impact of offsetting positions: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Derivatives not designated as hedging instruments Location of Gain (Loss) Futures Net return on mortgage servicing rights $ 1 $ (2) $ (4) Interest rate swaps and swaptions Net return on mortgage servicing rights 28 57 1 Mortgage-backed securities forwards Net return on mortgage servicing rights 36 21 (2) Rate lock commitments and MSR forwards Net gain on loan sales 86 35 (31) Forward commitments Other noninterest income — 2 — Interest rate swaps (1) Other noninterest income 3 5 3 Total derivative (loss) gain $ 154 $ 118 $ (33) (1) Includes customer-initiated commercial interest rate swaps.

Deposit Accounts (Tables)

Deposit Accounts (Tables)	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Summary of Deposit Accounts	The deposit accounts are as follows: December 31, 2020 2019 (Dollars in millions) Retail deposits Branch retail deposits Savings accounts $ 3,437 $ 3,030 Demand deposit accounts 1,726 1,318 Certificates of deposit/CDARS 1,355 2,353 Money market demand accounts 490 495 Total branch retail deposits 7,008 7,196 Commercial deposits (1) Demand deposit accounts 2,294 1,438 Savings accounts 461 342 Money market demand accounts 208 188 Total commercial retail deposits 2,963 1,968 Total retail deposits 9,971 9,164 Government deposits Savings accounts 778 495 Demand deposit accounts 529 360 Certificates of deposit/CDARS 458 358 Total government deposits (2) 1,765 1,213 Wholesale deposits 1,031 633 Custodial deposits (3) 7,206 4,136 Total deposits $ 19,973 $ 15,146 (1) Includes deposits from commercial and business banking customers. (2) Government deposits include funds from municipalities and schools. (3) Accounts represent a portion of the investor custodial accounts and escrows controlled by us in connection with loans serviced or subserviced for others and that have been placed on deposit with the Bank.
Scheduled Maturities for Certificates of Deposit	The following indicates the scheduled maturities for certificates of deposit with a minimum denomination of $250,000: December 31, 2020 2019 (Dollars in millions) Three months or less $ 220 $ 223 Over three months to six months 220 238 Over six months to twelve months 153 278 One to two years 71 101 Thereafter 19 35 Total $ 683 $ 875

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Breakdown of FHLB Advances and Other Borrowings Outstanding	The following is a breakdown of our FHLB advances and other borrowings outstanding: December 31, 2020 December 31, 2019 Amount Rate Amount Rate (Dollars in millions) Short-term fixed rate term advances $ 3,415 0.20 % $ 3,695 1.61 % Other short-term borrowings 485 0.08 % 470 1.64 % Total short-term Federal Home Loan Bank advances and other borrowings 3,900 4,165 Long-term fixed rate advances 1,200 1.03 % 650 1.45 % Total long-term Federal Home Loan Bank advances 1,200 650 Total Federal Home Loan Bank advances and other borrowings $ 5,100 $ 4,815
Detailed Information on FHLB Advances and Other Borrowings	The following table contains detailed information on our FHLB advances and other borrowings: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Maximum outstanding at any month end $ 6,841 $ 5,005 $ 5,740 Average outstanding balance 3,873 3,064 4,713 Average remaining borrowing capacity 5,282 4,194 2,089 Weighted average interest rate 0.72 % 1.90 % 1.96 %
Maturity Dates of FHLB Advances and Other Borrowings	The following table outlines the maturity dates of our FHLB advances and other borrowings: December 31, 2020 (Dollars in millions) 2021 $ 3,900 2022 200 2023 500 2024 100 Thereafter 400 Total $ 5,100
Summary of Long-Term Debt, Net of Debt Issuance Costs	The following table presents long-term debt, net of debt issuance costs: December 31, 2020 December 31, 2019 Amount Interest Rate Amount Interest Rate (Dollars in millions) Senior Notes Senior notes, matures 2021 $ 246 6.125 % $ 249 6.125% Subordinated Notes Notes, matures 2030 148 4.125 % — — % Trust Preferred Securities Floating Three Month LIBOR Plus: Plus 3.25%, matures 2032 26 3.50 % 26 5.20 % Plus 3.25%, matures 2033 26 3.49 % 26 5.24 % Plus 3.25%, matures 2033 26 3.49 % 26 5.21 % Plus 2.00%, matures 2035 26 2.24 % 26 3.99 % Plus 2.00%, matures 2035 26 2.24 % 26 3.99 % Plus 1.75%, matures 2035 51 1.97 % 51 3.64 % Plus 1.50%, matures 2035 25 1.74 % 25 3.49 % Plus 1.45%, matures 2037 25 1.67 % 25 3.34 % Plus 2.50%, matures 2037 16 2.72 % 16 4.39 % Total Trust Preferred Securities 247 247 Total other long-term debt $ 641 $ 496

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Components in Accumulated Other Comprehensive Income (Loss)	The following table sets forth the components in accumulated other comprehensive income: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Investment Securities Beginning balance $ 1 $ (47) $ (18) Unrealized gain (loss) 68 57 (30) Less: Tax provision (benefit) 16 14 (7) Net unrealized gain (loss) 52 43 (23) Reclassifications out of AOCI (1) (1) 6 (1) Less: Tax provision — 1 — Net unrealized (loss) gain reclassified out of AOCI (1) 5 (1) Reclassification of certain income tax effects (2) — — (5) Other comprehensive income (loss), net of tax 51 48 (29) Ending balance $ 52 $ 1 $ (47) Cash Flow Hedges Beginning balance $ — $ — $ 2 Unrealized (loss) gain (9) — 27 Less: Tax (benefit) provision (2) — 7 Net unrealized (loss) gain (7) — 20 Reclassifications out of AOCI (1) 2 — (30) Less: Tax benefit — — (8) Net unrealized gain (loss) reclassified out of AOCI 2 — (22) Other comprehensive loss, net of tax (5) — (2) Ending balance $ (5) $ — $ — (1) Reclassifications are reported in noninterest income on the Consolidated Statement of Operations. (2) Income tax effects of the Tax Cuts and Jobs Act are reclassified from AOCI to retained earnings due to early adoption of ASU 2018-02.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share of Common Stock	The following table sets forth the computation of basic and diluted earnings per share of common stock: For the Years Ended December 31, 2020 2019 2018 (In millions, except share data) Net income applicable to common stockholders $ 538 $ 218 $ 187 Weighted Average Shares Weighted average common shares outstanding 56,094,542 56,584,238 57,520,289 Effect of dilutive securities Stock-based awards 411,271 654,740 802,661 Weighted average diluted common shares 56,505,813 57,238,978 58,322,950 Earnings per common share Basic earnings per common share $ 9.59 $ 3.85 $ 3.26 Effect of dilutive securities Stock-based awards (0.07) (0.05) (0.05) Diluted earnings per common share $ 9.52 $ 3.80 $ 3.21

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Summary of Restricted Stock Activity	The following table summarizes restricted stock activity: For the Years Ended December 31, 2020 2019 2018 Number of Shares Weighted Average Grant-Date Fair Value per Share Number of Shares Weighted Average Grant-Date Fair Value per Share Number of Shares Weighted Average Grant-Date Fair Value per Share Restricted Stock and Restricted Stock Units Non-vested balance at beginning of period 1,399,127 $ 28.72 1,620,568 $ 27.27 1,290,450 $ 20.52 Granted 379,835 27.97 338,737 32.11 875,352 34.32 Vested (537,571) 27.06 (379,936) 26.98 (401,379) 23.04 Canceled and forfeited (267,205) 23.13 (180,242) 25.66 (143,855) 21.46 Non-vested balance at end of period 974,186 $ 30.88 1,399,127 $ 28.72 1,620,568 $ 27.27

Income Taxes (Tables)

Income Taxes (Tables) - Federal	12 Months Ended
	Dec. 31, 2020
Schedule of Income Tax Disclosure
Components of the Provision (Benefit) for Income Taxes	Components of the provision for income taxes consist of the following: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Current Federal $ 154 $ 17 $ — State 14 6 1 Total current income tax expense 168 23 1 Deferred Federal (10) 39 47 State 8 (14) (3) Total deferred income tax expense (2) 25 44 Total income tax expense $ 166 $ 48 $ 45
Summary of Differences Between the Effective Tax Rate and the Statutory Federal Tax Rate	Our effective tax rate differs from the statutory federal tax rate. The following is a summary of such differences: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Provision at statutory federal income tax rate $ 148 $ 56 $ 49 (Decreases) increases resulting from: Bank owned life insurance (2) (2) (2) State income tax (benefit), net of federal income tax effect (net of valuation allowance release) 18 (6) (2) Low income housing tax losses (1) (1) (1) Other 3 1 1 Provision for income taxes $ 166 $ 48 $ 45 Effective tax provision rate 23.5 % 18.1 % 19.4 %
Temporary Differences and Carryforwards Giving Rise to DTAs and Liabilities	Temporary differences and carryforwards that give rise to DTAs and liabilities are comprised of the following: December 31, 2020 2019 (Dollars in millions) Deferred tax assets Net operating loss carryforwards (Federal and State) $ 36 $ 43 Allowance for credit losses 58 26 Accrued compensation 15 12 Litigation settlement 8 9 Lease liability 6 6 Contingent consideration 7 4 General business reserves 11 2 Other 4 11 Total $ 145 $ 113 Valuation allowance (7) (5) Total net $ 138 $ 108 Deferred tax liabilities Mark-to-market adjustments $ (4) $ (12) Premises and equipment (7) (7) State and local taxes (6) (7) Commercial lease financing (1) (5) Mortgage loan servicing rights (53) (5) Right of use asset (5) (6) Total $ (76) $ (42) Net deferred tax asset $ 62 $ 66

Regulatory Capital (Tables)

Regulatory Capital (Tables)	12 Months Ended
	Dec. 31, 2020
Banking and Thrift, Other Disclosures [Abstract]
Regulatory Capital Ratios	The following tables present the regulatory capital requirements under the applicable Basel III based U.S. capital rules: Flagstar Bancorp Actual Minimum Capital Ratios Well-Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in millions) December 31, 2020 Tier 1 capital (to adjusted avg. total assets) $ 2,270 7.71 % $ 1,178 4.0 % $ 1,472 5.0 % Common equity Tier 1 capital (to RWA) 2,030 9.15 % 999 4.5 % 1,442 6.5 % Tier 1 capital (to RWA) 2,270 10.23 % 1,331 6.0 % 1,775 8.0 % Total capital (to RWA) 2,638 11.89 % 1,775 8.0 % 2,219 10.0 % December 31, 2019 Tier 1 capital (to adjusted avg. total assets) $ 1,720 7.57 % $ 909 4.0 % $ 1,136 5.0 % Common equity Tier 1 capital (to RWA) 1,480 9.32 % 715 4.5 % 1,033 6.5 % Tier 1 capital (to RWA) 1,720 10.83 % 953 6.0 % 1,271 8.0 % Total capital (to RWA) 1,830 11.52 % 1,271 8.0 % 1,589 10.0 % Flagstar Bank Actual Minimum Capital Ratios Well-Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in millions) December 31, 2020 Tier 1 capital (to adjusted avg. total assets) $ 2,390 8.12 % $ 1,177 4.0 % $ 1,472 5.0 % Common equity Tier 1 capital (to RWA) 2,390 10.77 % 999 4.5 % 1,443 6.5 % Tier 1 capital (to RWA) 2,390 10.77 % 1,332 6.0 % 1,775 8.0 % Total capital (to RWA) 2,608 11.75 % 1,775 8.0 % 2,219 10.0 % December 31, 2019 Tier 1 capital (to adjusted avg. total assets) $ 1,752 7.71 % $ 909 4.0 % $ 1,136 5.0 % Common equity Tier 1 capital (to RWA) 1,752 11.04 % 714 4.5 % 1,032 6.5 % Tier 1 capital (to RWA) 1,752 11.04 % 952 6.0 % 1,270 8.0 % Total capital (to RWA) 1,862 11.73 % 1,270 8.0 % 1,587 10.0 %

Legal Proceedings, Contingenc_2

Legal Proceedings, Contingencies and Commitments (Tables)	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Summary of the Contractual Amount of Significant Commitments	The following table is a summary of the contractual amount of significant commitments: December 31, 2020 2019 (Dollars in millions) Commitments to extend credit Mortgage loan commitments including interest rate locks $ 10,702 $ 4,099 Warehouse loan commitments 2,849 1,944 Commercial and industrial commitments 1,271 1,107 Other construction commitments 1,934 2,015 HELOC commitments 544 558 Other consumer commitments 121 175 Standby and commercial letters of credit 95 82

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Financial Instruments Carried at Fair Value	The following tables present the financial instruments carried at fair value by caption on the Consolidated Statements of Financial Condition and by level in the valuation hierarchy: December 31, 2020 Level 1 Level 2 Level 3 Total Fair Value (Dollars in millions) Investment securities available-for-sale Agency - Commercial $ — $ 1,061 $ — $ 1,061 Agency - Residential — 735 — 735 Municipal obligations — 28 — 28 Corporate debt obligations — 77 — 77 Other MBS — 42 — 42 Certificate of deposit — 1 — 1 Loans held-for-sale Residential first mortgage loans — 7,009 — 7,009 Loans held-for-investment Residential first mortgage loans — 11 — 11 Home equity — — 2 2 Mortgage servicing rights — — 329 329 Derivative assets Rate lock commitments (fallout-adjusted) — — 208 208 Mortgage-backed securities forwards — 14 — 14 Interest rate swaps and swaptions — 59 — 59 Total assets at fair value $ — $ 9,037 $ 539 $ 9,576 Derivative liabilities Mortgage-backed securities forwards — (98) — $ (98) Interest rate swaps and swaptions — (4) — (4) DOJ Liability — — (35) (35) Total liabilities at fair value $ — $ (102) $ (35) $ (137) December 31, 2019 Level 1 Level 2 Level 3 Total Fair Value (Dollars in millions) Investment securities available-for-sale Agency - Commercial $ — $ 947 $ — $ 947 Agency - Residential — 1,015 — 1,015 Municipal obligations — 31 — 31 Corporate debt obligations — 77 — 77 Other MBS — 45 — 45 Certificate of deposit — 1 — 1 Loans held-for-sale Residential first mortgage loans — 5,219 — 5,219 Loans held-for-investment Residential first mortgage loans — 10 — 10 Home equity — — 2 2 Mortgage servicing rights — — 291 291 Derivative assets Rate lock commitments (fallout-adjusted) — — 34 34 Mortgage-backed securities forwards — 2 — 2 Interest rate swaps and swaptions — 26 — 26 Total assets at fair value $ — $ 7,373 $ 327 $ 7,700 Derivative liabilities Rate lock commitments (fallout-adjusted) $ — $ — $ (1) $ (1) Mortgage-backed securities forwards — (9) — (9) Interest rate swaps — (8) — (8) DOJ Liability — — (35) (35) Contingent consideration — — (10) (10) Total liabilities at fair value $ — $ (17) $ (46) $ (63)
Roll Forward of Financial Instruments	The following tables include a roll forward of the Consolidated Statements of Financial Condition amounts (including the change in fair value) for financial instruments classified by us within Level 3 of the valuation hierarchy: Balance at Total Gains / Purchases / Originations Sales Settlement Transfers In (Out) Balance at End of Year (Dollars in millions) Year Ended December 31, 2020 Assets Loans held-for-investment Home equity $ 2 $ — $ — $ — $ — $ — $ 2 Mortgage servicing rights (1) 291 (159) 268 (71) — — 329 Rate lock commitments (net) (1)(2) 34 358 1,005 — — (1,189) 208 Totals $ 327 $ 199 $ 1,273 $ (71) $ — $ (1,189) $ 539 Liabilities DOJ Liability $ (35) $ — $ — $ — $ — $ — $ (35) Contingent consideration (10) (17) — — 27 — — Totals $ (45) $ (17) $ — $ — $ 27 $ — $ (35) Year Ended December 31, 2019 Assets Loans held-for-investment Home equity $ 2 $ — $ — $ — $ — $ — $ 2 Mortgage servicing rights (1) 290 (165) 223 (57) — — 291 Rate lock commitments (net) (1)(2) 20 86 326 — — (398) 34 Totals $ 312 $ (79) $ 549 $ (57) $ — $ (398) $ 327 Liabilities DOJ Liability $ (60) $ 25 $ — $ — $ — $ — $ (35) Contingent consideration (6) (7) — — 3 — (10) Totals $ (66) $ 18 $ — $ — $ 3 $ — $ (45) Year Ended December 31, 2018 Assets Loans held-for-investment Home equity $ 4 $ — $ — $ — $ (2) $ — $ 2 Mortgage servicing rights (1) 291 (18) 356 (339) — — 290 Rate lock commitments (net) (1)(2) 24 (34) 235 — — (205) 20 Totals $ 319 $ (52) $ 591 $ (339) $ (2) $ (205) $ 312 Liabilities DOJ Liability $ (60) $ — $ — $ — $ — $ — $ (60) Contingent consideration (25) 13 — — 6 — (6) Totals $ (85) $ 13 $ — $ — $ 6 $ — $ (66) (1) We utilized swaptions, futures, forward agency and loan sales and interest rate swaps to manage the risk associated with mortgage servicing rights and rate lock commitments. Gains and losses for individual lines do not reflect the effect of our risk management activities related to such Level 3 instruments. (2) Rate lock commitments are reported on a fallout-adjusted basis. Transfers out of Level 3 represent the settlement value of the commitments that are transferred to LHFS, which are classified as Level 2 assets.
Quantitative Information about Recurring Level 3 Fair Value Financial Instruments	The following tables present the quantitative information about recurring Level 3 fair value financial instruments and the fair value measurements as of: Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars in millions) December 31, 2020 Assets Loans held-for-investment Home equity $ 2 Discounted cash flows Discount rate 7.2% -10.8% (9.0%) 12.6% - 18.9% (15.8%) 1.5%-2.3% (1.9%) Mortgage servicing rights $ 329 Discounted cash flows Option adjusted spread 3.4% - 21.2% (8.0%) 0% - 13.3% (10.5%) $67 - $95 ($81) Rate lock commitments (net) $ 208 Consensus pricing Closing pull-through rate 75.7% - 87.2% (77.5%) Liabilities DOJ Liability $ (35) Discounted cash flows See description below See description below Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars in millions) December 31, 2019 Assets Loans held-for-investment Home equity $ 2 Discounted cash flows Discount rate 7.2% -10.8% (9.0%) 13.0% - 19.5% (16.2%) 2.7%-4.0% (3.3%) (1) Mortgage servicing rights $ 291 Discounted cash flows Option adjusted spread 2.4% - 20.4% (5.3%) 0% - 12.3% (10.6%) $67 - $95 ($84) (1) Rate lock commitments (net) $ 34 Consensus pricing Origination pull-through rate 80.0% - 87.2% (81.5%) (1) Liabilities DOJ Liability $ (35) Discounted cash flows See description below See description below Contingent consideration $ (10) Discounted cash flows See description below See description below (2) (1) Unobservable inputs were weighted by their relative fair value of the instruments. (2) Unobservable inputs were not weighted as only one instrument exists.
Assets Measured at Fair Value on a Nonrecurring Basis	The following table presents assets measured at fair value on a nonrecurring basis: Total (1) Level 2 Level 3 Gains/(Losses) (Dollars in millions) December 31, 2020 Residential first mortgage loans $ 30 $ 30 $ — $ (1) Commercial loans 57 — 57 — Impaired loans held-for-investment (2) Residential first mortgage loans 24 — 24 (3) Repossessed assets (3) 8 — 8 (3) Totals $ 119 $ 30 $ 89 $ (7) December 31, 2019 Loans held-for-sale (2) $ 6 $ 6 $ — $ (1) Impaired loans held-for-investment (2) Residential first mortgage loans 14 — 14 (5) Repossessed assets (3) 10 — 10 (3) Totals $ 30 $ 6 $ 24 $ (9) (1) The fair values are determined at various dates dependent upon when certain conditions were met requiring fair value measurement. (2) Gains/(losses) reflect fair value adjustments on assets for which we did not elect the fair value option.
Quantitative Information about Nonrecurring Level 3 Fair Value Financial Instruments	The following table presents the quantitative information about nonrecurring Level 3 fair value financial instruments and the fair value measurements: Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars in millions) December 31, 2020 Commercial loans $ 57 Fair value of collateral Market price N/A (2) Impaired loans held-for-investment Residential first mortgage loans $ 24 Fair value of collateral Loss severity discount 0% - 100% (12.8%) (1) Repossessed assets $ 8 Fair value of collateral Loss severity discount 0% - 96.3% (24.5%) (1) December 31, 2019 Impaired loans held-for-investment Residential first mortgage loans $ 14 Fair value of collateral Loss severity discount 25% - 30% (25.9%) (1) Repossessed assets $ 10 Fair value of collateral Loss severity discount 0% - 100% (17.1%) (1) (1) Unobservable inputs were weighted by their relative fair value of the instruments.
Carrying Amount and Estimated Fair Value of Financial Instruments	The following table presents the carrying amount and estimated fair value of financial instruments that are carried either at fair value, cost or amortized cost: December 31, 2020 Estimated Fair Value Carrying Value Total Level 1 Level 2 Level 3 (Dollars in millions) Assets Cash and cash equivalents $ 623 $ 623 $ 623 $ — $ — Investment securities available-for-sale 1,944 1,944 — 1,944 — Investment securities held-to-maturity 377 393 — 393 — Loans held-for-sale 7,098 7,098 — 7,098 — Loans held-for-investment 16,227 16,188 — 11 16,177 Loans with government guarantees 2,516 2,498 — 2,498 — Mortgage servicing rights 329 329 — — 329 Federal Home Loan Bank stock 377 377 — 377 — Bank owned life insurance 356 358 — 358 — Repossessed assets 8 8 — — 8 Other assets, foreclosure claims 17 17 — 17 — Derivative financial instruments 281 281 — 73 208 Liabilities Retail deposits Demand deposits and savings accounts $ (8,616) $ (7,864) $ — $ (7,864) $ — Certificates of deposit (1,355) (1,365) — (1,365) — Wholesale deposits (1,031) (1,047) — (1,047) — Government deposits (1,765) (1,706) — (1,706) — Custodial deposits (7,206) (7,133) — (7,133) — Federal Home Loan Bank advances (5,100) (5,124) — (5,124) — Long-term debt (641) (596) — (596) — DOJ litigation settlement (35) (35) — — (35) Derivative financial instruments (102) (102) — (102) — December 31, 2019 Estimated Fair Value Carrying Value Total Level 1 Level 2 Level 3 (Dollars in millions) Assets Cash and cash equivalents $ 426 $ 426 $ 426 $ — $ — Investment securities available-for-sale 2,116 2,116 — 2,116 — Investment securities held-to-maturity 598 599 — 599 — Loans held-for-sale 5,258 5,258 — 5,258 — Loans held-for-investment 12,129 12,031 — 10 12,021 Loans with government guarantees 736 707 — 707 — Mortgage servicing rights 291 291 — — 291 Federal Home Loan Bank stock 303 303 — 303 — Bank owned life insurance 349 349 — 349 — Repossessed assets 10 10 — — 10 Other assets, foreclosure claims 45 45 — 45 — Derivative financial instruments, assets 62 88 — 54 34 Liabilities Retail deposits Demand deposits and savings accounts $ (6,811) $ (6,050) $ — $ (6,050) $ — Certificates of deposit (2,353) (2,368) — (2,368) — Wholesale deposits (633) (640) — (640) — Government deposits (1,213) (1,156) — (1,156) — Custodial deposits (4,136) (4,066) — (4,066) — Federal Home Loan Bank advances (4,815) (4,816) — (4,816) — Long-term debt (496) (462) — (462) — DOJ Liability (35) (35) — — (35) Contingent consideration (10) (10) — — (10) Derivative financial instruments, liabilities (18) (44) — (43) (1)
Changes in Fair Value Included in Earnings	The following table reflects the change in fair value included in earnings of financial instruments for which the fair value option has been elected: For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Assets Loans held-for-sale Net gain on loan sales $ 1,204 $ 348 $ (29) Loans held-for-investment Other noninterest income — 1 — Liabilities DOJ Liability Other noninterest income — 25 —
Differences Between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding	The following table reflects the difference between the aggregate fair value and aggregate remaining contractual principal balance outstanding for assets and liabilities for which the fair value option has been elected: December 31, 2020 December 31, 2019 Unpaid Principal Balance Fair Value Fair Value Over / (Under) Unpaid Principal Balance Unpaid Principal Balance Fair Value Fair Value Over / (Under) Unpaid Principal Balance (Dollars in millions) Assets Nonaccrual loans Loans held-for-sale $ 9 $ 7 $ (2) $ 3 $ 3 $ — Loans held-for-investment 9 8 (1) 5 4 (1) Total nonaccrual loans 18 15 (3) 8 7 (1) Other performing loans Loans held-for-sale 6,704 7,002 298 5,057 5,216 159 Loans held-for-investment 5 4 (1) 8 8 — Total other performing loans 6,709 7,006 297 5,065 5,224 159 Total loans Loans held-for-sale 6,713 7,009 296 5,060 5,219 159 Loans held-for-investment 14 12 (2) 13 12 (1) Total loans $ 6,727 $ 7,021 $ 294 $ 5,073 $ 5,231 $ 158 Liabilities DOJ Liability (1) $ (118) $ (35) $ 83 $ (118) $ (35) $ 83

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Financial Information by Business Segment	The following tables present financial information by business segment for the periods indicated: Year Ended December 31, 2020 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 570 $ 191 $ 18 $ (94) $ 685 Provision (benefit) for credit losses 3 (11) — 157 149 Net interest income after provision (benefit) for credit losses 567 202 18 (251) 536 Net gain on loan sales 2 969 — — 971 Loan fees and charges 1 98 66 — 165 Net return on mortgage servicing rights — 10 — — 10 Loan administration (expense) income (3) (35) 151 (29) 84 Other noninterest income 61 8 — 26 95 Total noninterest income 61 1,050 217 (3) 1,325 Compensation and benefits 108 161 46 151 466 Commissions 2 230 — — 232 Loan processing expense 5 55 36 2 98 Other noninterest expense 271 136 79 (125) 361 Total noninterest expense 386 582 161 28 1,157 Income before indirect overhead allocations and income taxes 242 670 74 (282) 704 Indirect overhead allocation (expense) income (40) (60) (19) 119 — Provision (benefit) for income taxes 42 128 12 (16) 166 Net income (loss) $ 160 $ 482 $ 43 $ (147) $ 538 Intersegment (expense) revenue $ (96) $ (48) $ 39 $ 105 $ — Average balances Loans held-for-sale $ 1 $ 5,541 $ — $ — $ 5,542 Loans with government guarantees $ — $ 1,571 $ — $ — $ 1,571 Loans held-for-investment (2) $ 11,376 $ 2,591 $ — $ 30 $ 13,997 Total assets $ 11,760 $ 10,735 $ 85 $ 4,328 $ 26,908 Deposits $ 10,996 $ — $ 6,712 $ 836 $ 18,544 (1) Includes offsetting adjustments made to reclassify income and expenses relating to operating leases and custodial deposits for subservicing clients. (2) Includes adjustment made to reclassify operating lease assets to loans held-for-investment. Year Ended December 31, 2019 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 410 $ 145 $ 16 $ (9) $ 562 Provision (benefit) for credit losses 20 2 — (4) 18 Net interest income after provision (benefit) for credit losses 390 143 16 (5) 544 Net (loss) gain on loan sales (14) 349 — — 335 Loan fees and charges 1 67 32 — 100 Net return on mortgage servicing rights — 6 — — 6 Loan administration (expense) income (3) (24) 124 (67) 30 Other noninterest income 62 12 — 65 139 Total noninterest income 46 410 156 (2) 610 Compensation and benefits 103 111 28 135 377 Commissions 2 109 — — 111 Loan processing expense 6 36 36 2 80 Other noninterest expense 165 90 59 6 320 Total noninterest expense 276 346 123 143 888 Income before indirect overhead allocations and income taxes 160 207 49 (150) 266 Indirect overhead allocation (41) (42) (18) 101 — Provision (benefit) for income taxes 24 35 6 (17) 48 Net income (loss) $ 95 $ 130 $ 25 $ (32) $ 218 Intersegment (expense) revenue $ (3) $ 13 $ 26 $ (36) $ — Average balances Loans held-for-sale $ — $ 3,952 $ — $ — $ 3,952 Loans with government guarantees $ — $ 553 $ — $ — $ 553 Loans held-for-investment (2) $ 7,876 $ 3,027 $ — $ 29 $ 10,932 Total assets $ 8,319 $ 8,467 $ 47 $ 3,841 $ 20,674 Deposits $ 10,301 $ — $ 3,851 $ 556 $ 14,708 (1) Includes offsetting adjustments made to reclassify income and expenses relating to operating leases and custodial deposits for subservicing clients. (2) Includes adjustment made to reclassify operating lease assets to loans held-for-investment. Year Ended December 31, 2018 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 272 $ 170 $ 7 $ 48 $ 497 Provision (benefit) for credit losses 2 2 — (12) (8) Net interest income after provision for credit losses 270 168 7 60 505 Net (loss) gain on loan sales (1) 201 — — 200 Loan fees and charges — 62 25 — 87 Net return on mortgage servicing rights — 36 — — 36 Loan administration (expense) income (2) (15) 69 (29) 23 Other noninterest income 45 15 — 33 93 Total noninterest income 42 299 94 4 439 Compensation and benefits 70 105 19 124 318 Commissions 2 78 — — 80 Loan processing expense 4 26 26 3 59 Other noninterest expense 101 66 44 44 255 Total noninterest expense 177 275 89 171 712 Income before indirect overhead allocations and income taxes 135 192 12 (107) 232 Indirect overhead allocation (39) (68) (20) 127 — Provision (benefit) for income taxes 20 27 (2) — 45 Net income (loss) $ 76 $ 97 $ (6) $ 20 $ 187 Intersegment revenue (expense) $ 10 $ 1 $ 19 $ (30) $ — Average balances Loans held-for-sale $ — $ 4,196 $ — $ — $ 4,196 Loans with government guarantees $ — $ 303 $ — $ — $ 303 Loans held-for-investment (2) $ 5,576 $ 2,814 $ — $ 29 $ 8,419 Total assets $ 5,760 $ 8,253 $ 34 $ 3,933 $ 17,980 Deposits $ 8,580 $ — $ 1,883 $ 312 $ 10,775 (1) Includes offsetting adjustments made to reclassify income and expenses relating to operating leases and custodial deposits for subservicing clients. (2) Includes adjustment made to reclassify operating lease assets to loans held-for-investment.

Holding Company Only Financia_2

Holding Company Only Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Unconsolidated Statements of Financial Condition	Flagstar Bancorp, Inc. Condensed Unconsolidated Statements of Financial Condition (Dollars in millions) December 31, 2020 2019 (Dollars in millions) Assets Cash and cash equivalents $ 304 $ 233 Investment in subsidiaries (1) 2,551 2,031 Other assets 17 47 Total assets $ 2,872 $ 2,311 Liabilities and Stockholders’ Equity Liabilities Long-term debt $ 641 $ 496 Other liabilities 30 27 Total liabilities 671 523 Stockholders’ Equity Common stock 1 1 Additional paid in capital 1,346 1,483 Accumulated other comprehensive income 47 1 Retained earnings 807 303 Total stockholders’ equity 2,201 1,788 Total liabilities and stockholders’ equity $ 2,872 $ 2,311 (1) Includes unconsolidated trusts of $7 million for December 31, 2020 and 2019.
Schedule of Condensed Unconsolidated Statements of Operations	Flagstar Bancorp, Inc. Condensed Unconsolidated Statements of Operations (Dollars in millions) For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Income Interest $ 2 $ 4 $ 1 Cash dividends received from subsidiaries 82 100 — Total 84 104 1 Expenses Interest 25 28 27 General and administrative 14 6 7 Total 39 34 34 Net income (loss) before undistributed income of subsidiaries 45 70 (33) Equity in undistributed income of subsidiaries 484 142 212 Net income before income taxes 529 212 179 Benefit for income taxes (9) (6) (8) Net income 538 218 187 Other comprehensive income (loss) (1) 46 48 (31) Comprehensive income $ 584 $ 266 $ 156 (1) See Consolidated Statements of Comprehensive Income for other comprehensive income (loss) detail.
Schedule of Condensed Unconsolidated Statements of Cash Flows	Flagstar Bancorp, Inc. Condensed Unconsolidated Statements of Cash Flows (Dollars in millions) For the Years Ended December 31, 2020 2019 2018 (Dollars in millions) Net income $ 538 $ 218 $ 187 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed income of subsidiaries (566) (241) (177) Dividends received from subsidiaries 82 104 — Other 34 10 (5) Net cash provided by operating activities 88 91 5 Investing Activities Net cash provided by investing activities — — — Financing Activities Stock buyback (150) (50) — Repayment of long-term debt (4) — — Proceeds from issuance of long-term debt 150 — — Debt issuance costs (2) — — Dividends declared and paid (11) (9) — Net cash used in financing activities (17) (59) — Net increase in cash and cash equivalents 71 32 5 Cash and cash equivalents, beginning of year 233 201 196 Cash and cash equivalents, end of year $ 304 $ 233 $ 201

Quarterly Financial Data (Una_2

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	The following table represents summarized data for each of the quarters in 2020 and 2019: 2020 Fourth Third Second First (Dollars in millions, except per share data) Interest income $ 212 $ 206 $ 201 $ 201 Interest expense 23 26 33 53 Net interest income 189 180 168 148 Provision for credit losses 2 32 102 14 Net interest income after provision for credit losses 187 148 66 134 Net gain on loan sales 232 346 303 90 Loan fees and charges 53 45 41 26 Net return (loss) on mortgage servicing rights — 12 (8) 6 Loan administration income 25 26 21 12 Deposit fees and charges 8 8 7 9 Other noninterest income 19 15 14 14 Noninterest expense 319 305 296 235 Income before income tax 205 295 148 56 Provision for income taxes 51 73 32 10 Net income from continuing operations $ 154 $ 222 $ 116 $ 46 Basic income per share $ 2.86 $ 3.90 $ 2.04 $ 0.80 Diluted income per share $ 2.83 $ 3.88 $ 2.03 $ 0.80 2019 Fourth Third Second First (Dollars in millions, except per share data) Interest income $ 213 $ 203 $ 198 $ 180 Interest expense 61 57 60 54 Net interest income 152 146 138 126 Provision for credit losses — 1 17 — Net interest income after provision for credit losses 152 145 121 126 Net gain on loan sales 101 110 75 49 Loan fees and charges 30 29 24 17 Net (loss) return on the mortgage servicing rights (3) (2) 5 6 Loan administration income 8 5 6 11 Deposit fees and charges 10 10 10 8 Other noninterest income 16 19 48 18 Noninterest expense 245 238 214 191 Income before income tax 69 78 75 44 Provision for income taxes 11 15 14 8 Net income from continuing operations $ 58 $ 63 $ 61 $ 36 Basic income per share $ 1.01 $ 1.12 $ 1.08 $ 0.64 Diluted income per share $ 1.00 $ 1.11 $ 1.06 $ 0.63

Description of Business, Basi_4

Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2020	Dec. 31, 2017
Schedule of Trading and Available-for-sale Securities [Line Items]
Percentage of total securities (in percentage)	94.00%
Loans receivable, minimum number of days past due to be placed on non-accrual status	90 days
Intangible asset amortization	$ 13	$ 15	$ 5
Estimated future aggregate amortization expense on intangible assets:
2021	11
2022	9
2023	7
Operating lease expense	13	12
Lease rental expense			11
Representation and warranty reserve	7	5
Advertising expense	22	25	26
Stockholders' equity attributable to parent	2,201	1,788	1,570		$ 1,399
Retained Earnings (Accumulated Deficit)
Estimated future aggregate amortization expense on intangible assets:
Stockholders' equity attributable to parent	807	303	$ 94		$ (98)
CECL ASU Adjustment to RE
Estimated future aggregate amortization expense on intangible assets:
Stockholders' equity attributable to parent		(23)
CECL ASU Adjustment to RE | Retained Earnings (Accumulated Deficit)
Estimated future aggregate amortization expense on intangible assets:
Stockholders' equity attributable to parent		$ (23)		$ 23
Other assets | Loans held for investment | Available-for-sale securities
Schedule of Trading and Available-for-sale Securities [Line Items]
Accrued interest receivable	43
Other assets | Investment securities | Available-for-sale securities
Schedule of Trading and Available-for-sale Securities [Line Items]
Accrued interest receivable	$ 5
Minimum
Schedule of Trading and Available-for-sale Securities [Line Items]
Estimated useful lives	3 years
Maximum
Schedule of Trading and Available-for-sale Securities [Line Items]
Estimated useful lives	30 years
Computer hardware and software | Minimum
Schedule of Trading and Available-for-sale Securities [Line Items]
Estimated useful lives	3 years
Computer hardware and software | Maximum
Schedule of Trading and Available-for-sale Securities [Line Items]
Estimated useful lives	7 years
Consumer loan secured by real estate
Schedule of Trading and Available-for-sale Securities [Line Items]
Loans receivable, excluding real estate loans, minimum number of days past due for charge-off	180 days
Consumer loan not secured by real estate
Schedule of Trading and Available-for-sale Securities [Line Items]
Loans receivable, excluding real estate loans, minimum number of days past due for charge-off	120 days

Description of Business, Basi_5

Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies - Schedule of Information Relating to Operating Leases (Details) $ in Millions	Dec. 31, 2020USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted-average remaining lease term (years)	3 years 7 months 20 days
Weighted-average discount rate	1.85%
Right-of-use asset	$ 23
Lease liability	$ 23
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities

Description of Business, Basi_6

Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies - Schedule of Minimum Contractual Lease Obligations (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Within one year	$ 9	$ 9
After one year and within two years	8	7
After two years and within three years	5	5
After three years and within four years	3	3
After four years and within five years	2	1
After five years	1	2
Total	$ 28	$ 27

Description of Business, Basi_7

Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 41	$ 46
Deposit account and other banking income | Community Banking | Deposit fees and charges
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	21	27
Interchange fees | Community Banking | Deposit fees and charges
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	11	11
Interchange fees | Community Banking | Other noninterest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1	2
Wealth management | Community Banking | Other noninterest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 8	$ 6

Description of Business, Basi_8

Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies - Impact of ASC 326 (Details) - USD ($) $ in Millions	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent	$ 2,201		$ 1,788	$ 1,570	$ 1,399
Allowance for loan losses	252	$ 130	107	128	140
Other liabilities	1,272		951
Reserve for unfunded commitments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other liabilities		10
Retained Earnings (Accumulated Deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent	$ 807		303	$ 94	$ (98)
Pre-ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses		107
Pre-ASC 326 Adoption | Reserve for unfunded commitments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other liabilities		3
Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent			(23)
Allowance for loan losses		23	23
Impact of ASC 326 Adoption | Reserve for unfunded commitments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other liabilities		7
Impact of ASC 326 Adoption | Retained Earnings (Accumulated Deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity attributable to parent		$ 23	$ (23)

Investment Securities - Summary

Investment Securities - Summary of Investment Securities (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale securities
Amortized Cost	$ 1,870,000,000	$ 2,115,000,000
Gross Unrealized Gains	74,000,000	8,000,000
Gross Unrealized Losses	0	(7,000,000)
Fair Value	1,944,000,000	2,116,000,000
Held-to-maturity securities
Amortized Cost	377,000,000	598,000,000
Gross Unrealized Gains	16,000,000	3,000,000
Gross Unrealized Losses	0	(2,000,000)
Fair Value	393,000,000	599,000,000
Securitized loans held-for-sale, amount	0	0
Agency - Commercial
Available-for-sale securities
Amortized Cost	1,018,000,000	948,000,000
Gross Unrealized Gains	43,000,000	2,000,000
Gross Unrealized Losses	0	(3,000,000)
Fair Value	1,061,000,000	947,000,000
Held-to-maturity securities
Amortized Cost	193,000,000	306,000,000
Gross Unrealized Gains	7,000,000	0
Gross Unrealized Losses	0	(1,000,000)
Fair Value	200,000,000	305,000,000
Agency - Residential
Available-for-sale securities
Amortized Cost	707,000,000	1,015,000,000
Gross Unrealized Gains	28,000,000	4,000,000
Gross Unrealized Losses	0	(4,000,000)
Fair Value	735,000,000	1,015,000,000
Held-to-maturity securities
Amortized Cost	184,000,000	292,000,000
Gross Unrealized Gains	9,000,000	3,000,000
Gross Unrealized Losses	0	(1,000,000)
Fair Value	193,000,000	294,000,000
Corporate debt obligations
Available-for-sale securities
Amortized Cost	75,000,000	76,000,000
Gross Unrealized Gains	2,000,000	1,000,000
Gross Unrealized Losses	0	0
Fair Value	77,000,000	77,000,000
Municipal obligations
Available-for-sale securities
Amortized Cost	27,000,000	31,000,000
Gross Unrealized Gains	1,000,000	0
Gross Unrealized Losses	0	0
Fair Value	28,000,000	31,000,000
Other MBS
Available-for-sale securities
Amortized Cost	42,000,000	44,000,000
Gross Unrealized Gains	0	1,000,000
Gross Unrealized Losses	0	0
Fair Value	42,000,000	45,000,000
Certificate of deposit
Available-for-sale securities
Amortized Cost	1,000,000	1,000,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 1,000,000	$ 1,000,000

Investment Securities - Investm

Investment Securities - Investment Securities, Narrative (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Trading and Available-for-sale Securities [Line Items]
Unrealized credit losses	$ 0	$ 0	$ 0
Collateral pledged
Schedule of Trading and Available-for-sale Securities [Line Items]
Pledged investment securities	$ 202,000,000	$ 874,000,000

Investment Securities - Availab

Investment Securities - Available-for-Sale Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Purchase of AFS securities	$ 360	$ 500	$ 340
AFS securities sold	$ 0	432
Gain on AFS securities		$ 7
US government-sponsored agency securities
Debt Securities, Available-for-sale [Line Items]
AFS securities sold			$ 0

Investment Securities - Held-to

Investment Securities - Held-to-Maturity Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Held-to-maturity Securities [Line Items]
Purchase of HTM securities	$ 0	$ 0	$ 0
Sales of HTM securities	$ 0	$ 0	$ 0

Investment Securities - Summa_2

Investment Securities - Summary of Unrealized Loss Positions on Investment Securities (Details) $ in Millions	Dec. 31, 2020USD ($)securities	Dec. 31, 2019USD ($)securities
Agency - Commercial
Fair Value
Unrealized Loss Position with Duration 12 Months and Over	$ 3	$ 148
Unrealized Loss Position with Duration Under 12 Months	$ 7	$ 303
Number of Securities
Unrealized Loss Position with Duration 12 Months and Over | securities	1,000,000	17
Unrealized Loss Position with Duration Under 12 Months | securities	2,000,000	19
Unrealized Loss
Unrealized Loss Position with Duration 12 Months and Over	$ 0	$ (3)
Unrealized Loss Position with Duration Under 12 Months	0	0
Fair Value
Unrealized Loss Position with Duration 12 Months and Over		148
Unrealized Loss Position with Duration Under 12 Months		$ 85
Number of Securities
Unrealized Loss Position with Duration 12 Months and Over | securities		13
Unrealized Loss Position with Duration Under 12 Months | securities		6
Unrealized Loss
Unrealized Loss Position with Duration 12 Months and Over		$ (1)
Unrealized Loss Position with Duration Under 12 Months		0
Agency - Residential
Fair Value
Unrealized Loss Position with Duration 12 Months and Over	0	266
Unrealized Loss Position with Duration Under 12 Months	$ 0	$ 148
Number of Securities
Unrealized Loss Position with Duration 12 Months and Over | securities	0	26
Unrealized Loss Position with Duration Under 12 Months | securities	1,000,000	14
Unrealized Loss
Unrealized Loss Position with Duration 12 Months and Over	$ 0	$ (3)
Unrealized Loss Position with Duration Under 12 Months	0	(1)
Fair Value
Unrealized Loss Position with Duration 12 Months and Over	0	35
Unrealized Loss Position with Duration Under 12 Months	$ 2	$ 38
Number of Securities
Unrealized Loss Position with Duration 12 Months and Over | securities	0	7
Unrealized Loss Position with Duration Under 12 Months | securities	3,000,000	10
Unrealized Loss
Unrealized Loss Position with Duration 12 Months and Over	$ 0	$ (1)
Unrealized Loss Position with Duration Under 12 Months	0	0
Corporate debt obligations
Fair Value
Unrealized Loss Position with Duration 12 Months and Over	0
Unrealized Loss Position with Duration Under 12 Months	$ 10
Number of Securities
Unrealized Loss Position with Duration 12 Months and Over | securities	0
Unrealized Loss Position with Duration Under 12 Months | securities	3,000,000
Unrealized Loss
Unrealized Loss Position with Duration 12 Months and Over	$ 0
Unrealized Loss Position with Duration Under 12 Months	0
Other MBS
Fair Value
Unrealized Loss Position with Duration 12 Months and Over	0
Unrealized Loss Position with Duration Under 12 Months	$ 0
Number of Securities
Unrealized Loss Position with Duration 12 Months and Over | securities	0
Unrealized Loss Position with Duration Under 12 Months | securities	1,000,000
Unrealized Loss
Unrealized Loss Position with Duration 12 Months and Over	$ 0
Unrealized Loss Position with Duration Under 12 Months	$ 0
Municipal obligations
Fair Value
Unrealized Loss Position with Duration 12 Months and Over		8
Unrealized Loss Position with Duration Under 12 Months		$ 0
Number of Securities
Unrealized Loss Position with Duration 12 Months and Over | securities		3
Unrealized Loss Position with Duration Under 12 Months | securities		0
Unrealized Loss
Unrealized Loss Position with Duration 12 Months and Over		$ 0
Unrealized Loss Position with Duration Under 12 Months		$ 0

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Amortized Cost
Due in one year or less	$ 5
Due after one year through five years	9
Due after five years through 10 years	123
Due after 10 years	1,733
Amortized Cost	1,870	$ 2,115
Fair Value
Due in one year or less	5
Due after one year through five years	10
Due after five years through 10 years	127
Due after 10 years	1,802
Fair Value	$ 1,944	2,116
Weighted-Average Yield
Due in one year or less	2.22%
Due after one year through five years	2.83%
Due after five years through 10 years	3.95%
Due after 10 years	2.34%
Amortized Cost
Due in one year or less	$ 0
Due after one year through five years	7
Due after five years through 10 years	7
Due after 10 years	363
Amortized Cost	377	598
Fair Value
Due in one year or less	0
Due after one year through five years	8
Due after five years through 10 years	8
Due after 10 years	377
Fair value	$ 393	$ 599
Weighted-Average Yield
Due in one year or less	0.00%
Due after one year through five years	2.44%
Due after five years through 10 years	2.37%
Due after 10 years	2.41%

Loans Held-for-Sale (Details)

Loans Held-for-Sale (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	$ 7,098				$ 5,258				$ 7,098	$ 5,258
Net gain on loan sales	232	$ 346	$ 303	$ 90	101	$ 110	$ 75	$ 49	971	335	$ 200
Loans held-for-sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain on loan sales									969	333	$ 197
Loans receivable held-for-sale, recorded at lower of cost or fair value
Accounts, Notes, Loans and Financing Receivable [Line Items]
LHFS after valuation allowance	$ 31				$ 39				$ 31	$ 39

Loans Held-for-Investment - Sum

Loans Held-for-Investment - Summary of Loans Held-for-Investment (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	$ 16,227	$ 12,129
Total consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment		4,907
Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	12,101	7,222
Total consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	4,126	4,907
Total consumer loans | Residential first mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	2,266	3,154
Total consumer loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	856	1,024
Total consumer loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	1,004	729
Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	12,101	7,222
Total commercial loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	3,061	2,828
Total commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	1,382	1,634
Total commercial loans | Warehouse lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held-for-investment	$ 7,658	$ 2,760

Loans Held-for-Investment - UPB

Loans Held-for-Investment - UPB of Loan Sales and Purchases in the Loans Held-for-Investment Portfolio (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans sold	$ 492	$ 217	$ 158
Net gain associated with loan sales	3	2	2
Loans Purchased	63	300	37
Premium associated with loans purchased	0	11	0
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Purchased	0	0	3
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Purchased	0	249	0
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Purchased	63	51	34
Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans sold	$ 492	$ 217	$ 158

Loans Held-for-Investment - Nar

Loans Held-for-Investment - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income that would have been accrued	$ 1,000,000	$ 1,000,000	$ 1,000,000
Loans 90 days or greater past due and still accruing	0	0
Collateral pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	80,000,000	54,000,000
Loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	$ 11,600,000,000	$ 9,100,000,000

Loans Held-for-Investment - Cha

Loans Held-for-Investment - Changes in ALLL by Class of Loan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	$ 107	$ 128	$ 140
Provision (benefit)	131	18	(8)
Charge-offs	(15)	(43)	(8)
Recoveries	6	4	4
Ending allowance balance	252	$ 107	128
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Impact of ASC 326 Adoption
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	23
Ending allowance balance		$ 23
Residential first mortgage
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326		38
Ending allowance balance			38
Home equity
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326		15
Ending allowance balance			15
Other
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326		3
Ending allowance balance			3
Commercial Real Estate
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326		48
Ending allowance balance			48
Commercial and industrial
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326		18
Ending allowance balance			18
Warehouse lending
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326		6
Ending allowance balance			6
Total consumer loans | Residential first mortgage
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	22	38	47
Provision (benefit)	8	(14)	(7)
Charge-offs	(6)	(3)	(4)
Recoveries	0	1	2
Ending allowance balance	49	22	38
Total consumer loans | Residential first mortgage | Impact of ASC 326 Adoption
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	25
Ending allowance balance		25
Total consumer loans | Home equity
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	14	15	22
Provision (benefit)	(2)	(1)	(6)
Charge-offs	(3)	(2)	(2)
Recoveries	4	2	1
Ending allowance balance	25	14	15
Total consumer loans | Home equity | Impact of ASC 326 Adoption
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	12
Ending allowance balance		12
Total consumer loans | Other
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	6	3	1
Provision (benefit)	26	10	3
Charge-offs	(5)	(7)	(2)
Recoveries	2	0	1
Ending allowance balance	39	6	3
Total consumer loans | Other | Impact of ASC 326 Adoption
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	10
Ending allowance balance		10
Total commercial loans | Commercial Real Estate
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	38	48	45
Provision (benefit)	60	(10)	3
Charge-offs	0	0	0
Recoveries	0	0	0
Ending allowance balance	84	38	48
Total commercial loans | Commercial Real Estate | Impact of ASC 326 Adoption
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	(14)
Ending allowance balance		(14)
Total commercial loans | Commercial and industrial
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	22	18	19
Provision (benefit)	36	34	(1)
Charge-offs	(1)	(31)	0
Recoveries	0	1	0
Ending allowance balance	51	22	18
Total commercial loans | Commercial and industrial | Impact of ASC 326 Adoption
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	(6)
Ending allowance balance		(6)
Total commercial loans | Warehouse lending
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	5	6	6
Provision (benefit)	3	(1)	0
Charge-offs	0	0	0
Recoveries	0	0	0
Ending allowance balance	4	5	$ 6
Total commercial loans | Warehouse lending | Impact of ASC 326 Adoption
Allowance for Loan Losses
Beginning balance, prior to adoption of ASC 326	$ (4)
Ending allowance balance		$ (4)

Loans Held-for-Investment - Agi

Loans Held-for-Investment - Aging Analysis of Past Due and Current Loans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Loans Held-for-Investment, Aging
Total Past Due	$ 92	$ 40
Current	16,135	12,089
Total loans	16,227	12,129
90 days or greater past due, fair value option	8	4
Interest income on nonaccrual loans using cash basis method	2	1
Collateral pledged
Loans Held-for-Investment, Aging
Loans pledged as collateral	80	54
Total consumer loans
Loans Held-for-Investment, Aging
Total Past Due		40
Current		4,867
Total loans		4,907
Total commercial loans
Loans Held-for-Investment, Aging
Total Past Due	39	0
Current	12,062	7,222
Total loans	12,101	7,222
30-59 Days Past Due
Loans Held-for-Investment, Aging
Total Past Due	30	9
30-59 Days Past Due | Total consumer loans
Loans Held-for-Investment, Aging
Total Past Due		9
30-59 Days Past Due | Total commercial loans
Loans Held-for-Investment, Aging
Total Past Due	21	0
60-89 Days Past Due
Loans Held-for-Investment, Aging
Total Past Due	6	5
60-89 Days Past Due | Total consumer loans
Loans Held-for-Investment, Aging
Total Past Due		5
60-89 Days Past Due | Total commercial loans
Loans Held-for-Investment, Aging
Total Past Due	0	0
90 Days or greater past due
Loans Held-for-Investment, Aging
Total Past Due	56	26
90 Days or greater past due | Total consumer loans
Loans Held-for-Investment, Aging
Total Past Due		26
90 Days or greater past due | Total commercial loans
Loans Held-for-Investment, Aging
Total Past Due	18	0
Total consumer loans
Loans Held-for-Investment, Aging
Total Past Due	53
Current	4,073
Total loans	4,126	4,907
Total consumer loans | Residential first mortgage
Loans Held-for-Investment, Aging
Total Past Due	39	30
Current	2,227	3,124
Total loans	2,266	3,154
Total consumer loans | Home equity
Loans Held-for-Investment, Aging
Total Past Due	7	5
Current	849	1,019
Total loans	856	1,024
Total consumer loans | Other
Loans Held-for-Investment, Aging
Total Past Due	7	5
Current	997	724
Total loans	1,004	729
Total consumer loans | 30-59 Days Past Due
Loans Held-for-Investment, Aging
Total Past Due	9
Total consumer loans | 30-59 Days Past Due | Residential first mortgage
Loans Held-for-Investment, Aging
Total Past Due	4	5
Total consumer loans | 30-59 Days Past Due | Home equity
Loans Held-for-Investment, Aging
Total Past Due	1	1
Total consumer loans | 30-59 Days Past Due | Other
Loans Held-for-Investment, Aging
Total Past Due	4	3
Total consumer loans | 60-89 Days Past Due
Loans Held-for-Investment, Aging
Total Past Due	6
Total consumer loans | 60-89 Days Past Due | Residential first mortgage
Loans Held-for-Investment, Aging
Total Past Due	4	4
Total consumer loans | 60-89 Days Past Due | Home equity
Loans Held-for-Investment, Aging
Total Past Due	1	0
Total consumer loans | 60-89 Days Past Due | Other
Loans Held-for-Investment, Aging
Total Past Due	1	1
Total consumer loans | 90 Days or greater past due
Loans Held-for-Investment, Aging
Total Past Due	38
Total consumer loans | 90 Days or greater past due | Residential first mortgage
Loans Held-for-Investment, Aging
Total Past Due	31	21
Total consumer loans | 90 Days or greater past due | Home equity
Loans Held-for-Investment, Aging
Total Past Due	5	4
Total consumer loans | 90 Days or greater past due | Other
Loans Held-for-Investment, Aging
Total Past Due	2	1
Total commercial loans
Loans Held-for-Investment, Aging
Total loans	12,101	7,222
Total commercial loans | Commercial Real Estate
Loans Held-for-Investment, Aging
Total Past Due	23	0
Current	3,038	2,828
Total loans	3,061	2,828
Total commercial loans | Commercial and industrial
Loans Held-for-Investment, Aging
Total Past Due	16	0
Current	1,366	1,634
Total loans	1,382	1,634
Total commercial loans | Warehouse lending
Loans Held-for-Investment, Aging
Total Past Due	0	0
Current	7,658	2,760
Total loans	7,658	2,760
Total commercial loans | 30-59 Days Past Due | Commercial Real Estate
Loans Held-for-Investment, Aging
Total Past Due	20	0
Total commercial loans | 30-59 Days Past Due | Commercial and industrial
Loans Held-for-Investment, Aging
Total Past Due	1	0
Total commercial loans | 30-59 Days Past Due | Warehouse lending
Loans Held-for-Investment, Aging
Total Past Due	0	0
Total commercial loans | 60-89 Days Past Due | Commercial Real Estate
Loans Held-for-Investment, Aging
Total Past Due	0	0
Total commercial loans | 60-89 Days Past Due | Commercial and industrial
Loans Held-for-Investment, Aging
Total Past Due	0	0
Total commercial loans | 60-89 Days Past Due | Warehouse lending
Loans Held-for-Investment, Aging
Total Past Due	0	0
Total commercial loans | 90 Days or greater past due | Commercial Real Estate
Loans Held-for-Investment, Aging
Total Past Due	3	0
Total commercial loans | 90 Days or greater past due | Commercial and industrial
Loans Held-for-Investment, Aging
Total Past Due	15	0
Total commercial loans | 90 Days or greater past due | Warehouse lending
Loans Held-for-Investment, Aging
Total Past Due	$ 0	$ 0

Loans Held-for-Investment - S_2

Loans Held-for-Investment - Summary of TDRs by Type and Performing Status (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Troubled Debt Restructurings
TDR balance	$ 46	$ 48
Financing receivable, modifications, loans and leases receivable, allowance	5	8
TDR loans under fair value option	3	2
Consumer loans
Troubled Debt Restructurings
TDR balance	41
Consumer loans | Residential first mortgage
Troubled Debt Restructurings
TDR balance	27	28
Consumer loans | Home equity
Troubled Debt Restructurings
TDR balance	14	20
Commercial Loans
Troubled Debt Restructurings
TDR balance	5
Commercial Loans | Commercial real estate
Troubled Debt Restructurings
TDR balance	5
Commercial Loans | Commercial and industrial
Troubled Debt Restructurings
TDR balance	0
Performing
Troubled Debt Restructurings
TDR balance	36	38
Performing | Consumer loans
Troubled Debt Restructurings
TDR balance	31
Performing | Consumer loans | Residential first mortgage
Troubled Debt Restructurings
TDR balance	19	20
Performing | Consumer loans | Home equity
Troubled Debt Restructurings
TDR balance	12	18
Performing | Commercial Loans
Troubled Debt Restructurings
TDR balance	5
Performing | Commercial Loans | Commercial real estate
Troubled Debt Restructurings
TDR balance	5
Performing | Commercial Loans | Commercial and industrial
Troubled Debt Restructurings
TDR balance	0
Nonperforming
Troubled Debt Restructurings
TDR balance	10	10
Nonperforming | Consumer loans
Troubled Debt Restructurings
TDR balance	10
Nonperforming | Consumer loans | Residential first mortgage
Troubled Debt Restructurings
TDR balance	8	8
Nonperforming | Consumer loans | Home equity
Troubled Debt Restructurings
TDR balance	2	$ 2
Nonperforming | Commercial Loans
Troubled Debt Restructurings
TDR balance	0
Nonperforming | Commercial Loans | Commercial real estate
Troubled Debt Restructurings
TDR balance	0
Nonperforming | Commercial Loans | Commercial and industrial
Troubled Debt Restructurings
TDR balance	$ 0

Loans Held-for-Investment - S_3

Loans Held-for-Investment - Summary of Newly Modified TDRs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Accounts | loan	14,000,000	14	31
Pre-Modification Unpaid Principal Balance	$ 7	$ 1	$ 4
Post-modification unpaid principal balance	7	1	4
Increase (Decrease) in Allowance at Modification	$ 0	$ 0	$ 0
Residential first mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Accounts | loan	9,000,000	8	14
Pre-Modification Unpaid Principal Balance	$ 2	$ 1	$ 3
Post-modification unpaid principal balance	2	1	3
Increase (Decrease) in Allowance at Modification	$ 0	$ 0	$ 0
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Accounts | loan	3,000,000	6	17
Pre-Modification Unpaid Principal Balance	$ 0	$ 0	$ 1
Post-modification unpaid principal balance	0	0	1
Increase (Decrease) in Allowance at Modification	$ 0	$ 0	$ 0
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Accounts | loan	1,000,000
Pre-Modification Unpaid Principal Balance	$ 0
Post-modification unpaid principal balance	0
Increase (Decrease) in Allowance at Modification	$ 0
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Accounts | loan	1,000,000
Pre-Modification Unpaid Principal Balance	$ 5
Post-modification unpaid principal balance	5
Increase (Decrease) in Allowance at Modification	$ 0

Loans Held-for-Investment - Loa

Loans Held-for-Investment - Loan Credit Quality Indicators (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment
Total loans held-for-investment	$ 16,227	$ 12,129
Total consumer loans
Financing Receivable, Recorded Investment
Total loans held-for-investment		4,907
Total consumer loans
Financing Receivable, Recorded Investment
2020	662
2019	901
2018	396
2017	301
2016	255
Prior	481
Revolving Loans Amortized Cost Basis	1,043
Revolving Loans Converted to Term Loans Amortized Cost Basis	70
Total	4,109	4,895
Total loans held-for-investment	4,126	4,907
Total consumer loans | Residential first mortgage
Financing Receivable, Recorded Investment
Total loans held-for-investment	2,266	3,154
Total consumer loans | Residential first mortgage | Debt-to-value ratio, 90 to 100 percent
Financing Receivable, Recorded Investment
2020	84
2019	260
2018	123
2017	35
2016	3
Prior	19
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	524
Total consumer loans | Residential first mortgage | Debt-to-value ratio, 71 to 90 percent
Financing Receivable, Recorded Investment
2020	169
2019	180
2018	66
2017	99
2016	72
Prior	238
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	824
Total consumer loans | Residential first mortgage | Debt-to-value ratio, 55 to 70 percent
Financing Receivable, Recorded Investment
2020	83
2019	60
2018	22
2017	82
2016	96
Prior	122
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	465
Total consumer loans | Residential first mortgage | Debt-to-value ratio, less than 55 percent
Financing Receivable, Recorded Investment
2020	26
2019	48
2018	26
2017	76
2016	81
Prior	73
Revolving Loans Amortized Cost Basis	93
Revolving Loans Converted to Term Loans Amortized Cost Basis	15
Total	438
Total consumer loans | Residential first mortgage | FICO score, greater than 750
Financing Receivable, Recorded Investment
2020	195
2019	272
2018	118
2017	193
2016	181
Prior	231
Revolving Loans Amortized Cost Basis	55
Revolving Loans Converted to Term Loans Amortized Cost Basis	6
Total	1,251
Total consumer loans | Residential first mortgage | FICO score, 700 to 750
Financing Receivable, Recorded Investment
2020	119
2019	180
2018	90
2017	85
2016	64
Prior	130
Revolving Loans Amortized Cost Basis	25
Revolving Loans Converted to Term Loans Amortized Cost Basis	7
Total	700
Total consumer loans | Residential first mortgage | FICO score, less than 700
Financing Receivable, Recorded Investment
2020	48
2019	96
2018	29
2017	14
2016	7
Prior	91
Revolving Loans Amortized Cost Basis	13
Revolving Loans Converted to Term Loans Amortized Cost Basis	2
Total	300
Total consumer loans | Residential first mortgage | Pass
Financing Receivable, Recorded Investment
2020	362
2019	544
2018	231
2017	289
2016	252
Prior	420
Revolving Loans Amortized Cost Basis	92
Revolving Loans Converted to Term Loans Amortized Cost Basis	15
Total	2,205	3,107
Total consumer loans | Residential first mortgage | Watch
Financing Receivable, Recorded Investment
2020	0
2019	1
2018	1
2017	1
2016	0
Prior	17
Revolving Loans Amortized Cost Basis	1
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	21	23
Total consumer loans | Residential first mortgage | Substandard
Financing Receivable, Recorded Investment
2020	0
2019	3
2018	5
2017	2
2016	0
Prior	15
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	25	15
Total consumer loans | Home equity
Financing Receivable, Recorded Investment
Total loans held-for-investment	856	1,024
Total consumer loans | Home equity | Debt-to-value ratio, 90 to 100 percent
Financing Receivable, Recorded Investment
2020	0
2019	0
2018	0
2017	1
2016	1
Prior	10
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	12
Total consumer loans | Home equity | Debt-to-value ratio, 71 to 90 percent
Financing Receivable, Recorded Investment
2020	5
2019	24
2018	10
2017	4
2016	1
Prior	9
Revolving Loans Amortized Cost Basis	548
Revolving Loans Converted to Term Loans Amortized Cost Basis	33
Total	634
Total consumer loans | Home equity | Debt-to-value ratio, less than or equal to 70 percent
Financing Receivable, Recorded Investment
2020	2
2019	7
2018	3
2017	1
2016	0
Prior	4
Revolving Loans Amortized Cost Basis	175
Revolving Loans Converted to Term Loans Amortized Cost Basis	16
Total	208
Total consumer loans | Home equity | FICO score, greater than 750
Financing Receivable, Recorded Investment
2020	2
2019	9
2018	6
2017	2
2016	1
Prior	7
Revolving Loans Amortized Cost Basis	324
Revolving Loans Converted to Term Loans Amortized Cost Basis	13
Total	364
Total consumer loans | Home equity | FICO score, 700 to 750
Financing Receivable, Recorded Investment
2020	3
2019	12
2018	4
2017	3
2016	1
Prior	8
Revolving Loans Amortized Cost Basis	289
Revolving Loans Converted to Term Loans Amortized Cost Basis	20
Total	340
Total consumer loans | Home equity | FICO score, less than 700
Financing Receivable, Recorded Investment
2020	2
2019	10
2018	3
2017	1
2016	0
Prior	8
Revolving Loans Amortized Cost Basis	110
Revolving Loans Converted to Term Loans Amortized Cost Basis	16
Total	150
Total consumer loans | Home equity | Pass
Financing Receivable, Recorded Investment
2020	7
2019	31
2018	13
2017	6
2016	2
Prior	11
Revolving Loans Amortized Cost Basis	720
Revolving Loans Converted to Term Loans Amortized Cost Basis	48
Total	838	1,002
Total consumer loans | Home equity | Watch
Financing Receivable, Recorded Investment
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	11
Revolving Loans Amortized Cost Basis	2
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	13	16
Total consumer loans | Home equity | Substandard
Financing Receivable, Recorded Investment
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	1
Revolving Loans Amortized Cost Basis	1
Revolving Loans Converted to Term Loans Amortized Cost Basis	1
Total	3	3
Total consumer loans | Other consumer | FICO score, greater than 750
Financing Receivable, Recorded Investment
2020	209
2019	205
2018	80
2017	2
2016	1
Prior	5
Revolving Loans Amortized Cost Basis	213
Revolving Loans Converted to Term Loans Amortized Cost Basis	6
Total	721
Total consumer loans | Other consumer | FICO score, 700 to 750
Financing Receivable, Recorded Investment
2020	79
2019	107
2018	55
2017	1
2016	0
Prior	1
Revolving Loans Amortized Cost Basis	9
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	252
Total consumer loans | Other consumer | FICO score, less than 700
Financing Receivable, Recorded Investment
2020	5
2019	10
2018	11
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	5
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	31
Total consumer loans | Other consumer | Pass
Financing Receivable, Recorded Investment
2020	292
2019	321
2018	145
2017	3
2016	1
Prior	6
Revolving Loans Amortized Cost Basis	227
Revolving Loans Converted to Term Loans Amortized Cost Basis	5
Total	1,000	727
Total consumer loans | Other consumer | Watch
Financing Receivable, Recorded Investment
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	1
Total	1	1
Total consumer loans | Other consumer | Substandard
Financing Receivable, Recorded Investment
2020	1
2019	1
2018	1
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	3	1
Total consumer loans | Residential first mortgage and home equity
Financing Receivable, Recorded Investment
2020	369
2019	579
2018	250
2017	298
2016	254
Prior	475
Revolving Loans Amortized Cost Basis	816
Revolving Loans Converted to Term Loans Amortized Cost Basis	64
Total	3,105
Total commercial loans
Financing Receivable, Recorded Investment
2020	8,376
2019	1,508
2018	711
2017	701
2016	400
Prior	386
Revolving Loans Amortized Cost Basis	19
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	12,101	7,222
Total commercial loans | Commercial Real Estate
Financing Receivable, Recorded Investment
Total loans held-for-investment	3,061	2,828
Total commercial loans | Commercial Real Estate | Pass
Financing Receivable, Recorded Investment
2020	347
2019	993
2018	439
2017	438
2016	308
Prior	280
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	2,805	2,794
Total commercial loans | Commercial Real Estate | Watch
Financing Receivable, Recorded Investment
2020	21
2019	19
2018	35
2017	51
2016	21
Prior	19
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	166	24
Total commercial loans | Commercial Real Estate | Substandard
Financing Receivable, Recorded Investment
2020	0
2019	11
2018	1
2017	25
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	37	5
Total commercial loans | Commercial Real Estate | Special mention
Financing Receivable, Recorded Investment
2020	5
2019	1
2018	16
2017	0
2016	17
Prior	14
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	53	5
Total commercial loans | Commercial and industrial
Financing Receivable, Recorded Investment
Total loans held-for-investment	1,382	1,634
Total commercial loans | Commercial and industrial | Pass
Financing Receivable, Recorded Investment
2020	319
2019	425
2018	163
2017	149
2016	54
Prior	71
Revolving Loans Amortized Cost Basis	19
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	1,200	1,533
Total commercial loans | Commercial and industrial | Watch
Financing Receivable, Recorded Investment
2020	3
2019	48
2018	28
2017	25
2016	0
Prior	2
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	106	72
Total commercial loans | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment
2020	22
2019	11
2018	15
2017	4
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	52	5
Total commercial loans | Commercial and industrial | Special mention
Financing Receivable, Recorded Investment
2020	1
2019	0
2018	14
2017	9
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	24	24
Total commercial loans | Warehouse loan commitments | Pass
Financing Receivable, Recorded Investment
2020	7,398
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	7,398	2,556
Total commercial loans | Warehouse loan commitments | Watch
Financing Receivable, Recorded Investment
2020	260
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	260	189
Total commercial loans | Warehouse loan commitments | Substandard
Financing Receivable, Recorded Investment
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	0	0
Total commercial loans | Warehouse loan commitments | Special mention
Financing Receivable, Recorded Investment
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total loans held-for-investment	$ 0	$ 15

Loans with Government Guarant_2

Loans with Government Guarantees (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Abstract]
Debt instrument, term	10 years
Loans with government guarantees	$ 2,516	$ 736
Repurchase option	1,900
Increase in repurchase option	1,800
Repossessed assets and associated claims	$ 17	$ 45

Repossessed Assets - Summary of

Repossessed Assets - Summary of Repossessed Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Repossessed Assets [Line Items]
Total repossessed assets	$ 8	$ 10	$ 7	$ 8
One-to-four family properties
Repossessed Assets [Line Items]
Total repossessed assets	4	6
Commercial properties
Repossessed Assets [Line Items]
Total repossessed assets	$ 4	$ 4

Repossessed Assets - Activity i

Repossessed Assets - Activity in Repossessed Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Repossessed Assets [Roll Forward]
Beginning balance	$ 10	$ 7	$ 8
Additions, net	8	12	10
Disposals	(7)	(4)	(8)
Net write down on disposal	(3)	(5)	(3)
Ending balance	$ 8	$ 10	$ 7

Variable Interest Entities (Det

Variable Interest Entities (Details) - entity	Dec. 31, 2020	Dec. 31, 2019
Private-label Securitizations [Line Items]
Number of variable interest entities	0	0
Agency - commercial
Private-label Securitizations [Line Items]
Ownership interest in investment	5.00%

Federal Home Loan Bank Stock (D

Federal Home Loan Bank Stock (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal Home Loan Bank Stock [Abstract]
Federal Home Loan Bank stock	$ 377	$ 303
Federal Home Loan Bank stock, minimum investment requirement, percentage of unpaid principal of mortgage loans, home purchase contracts and similar obligations (in percentage)	1.00%
Federal Home Loan Bank minimum percentage of advances required held (in percentage)	4.50%
Payments to acquire FHLB stock	$ 74	0
Dividend income	$ 12	$ 16	$ 15

Premises and Equipment - Premis

Premises and Equipment - Premises and Equipment and Estimated Useful Lives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Premises and Equipment, Net, by Type
Property, plant, and equipment and finance lease right-of-use asset, before accumulated depreciation and amortization	$ 834	$ 811
Less: accumulated depreciation	(442)	(395)
Premises and equipment, net	$ 392	416
Minimum
Premises and Equipment, Net, by Type
Estimated useful lives	3 years
Maximum
Premises and Equipment, Net, by Type
Estimated useful lives	30 years
Land
Premises and Equipment, Net, by Type
Premises and equipment, gross	$ 68	73
Computer hardware and software
Premises and Equipment, Net, by Type
Premises and equipment, gross	$ 410	372
Computer hardware and software | Minimum
Premises and Equipment, Net, by Type
Estimated useful lives	3 years
Computer hardware and software | Maximum
Premises and Equipment, Net, by Type
Estimated useful lives	7 years
Office buildings and improvements
Premises and Equipment, Net, by Type
Premises and equipment, gross	$ 195	191
Office buildings and improvements | Minimum
Premises and Equipment, Net, by Type
Estimated useful lives	15 years
Office buildings and improvements | Maximum
Premises and Equipment, Net, by Type
Estimated useful lives	31 years 6 months
Furniture, fixtures and equipment
Premises and Equipment, Net, by Type
Premises and equipment, gross	$ 66	68
Furniture, fixtures and equipment | Minimum
Premises and Equipment, Net, by Type
Estimated useful lives	5 years
Furniture, fixtures and equipment | Maximum
Premises and Equipment, Net, by Type
Estimated useful lives	7 years
Leased equipment
Premises and Equipment, Net, by Type
Premises and equipment, gross	$ 19	36
Leased equipment | Minimum
Premises and Equipment, Net, by Type
Estimated useful lives	3 years
Leased equipment | Maximum
Premises and Equipment, Net, by Type
Estimated useful lives	10 years
Leasehold improvements
Premises and Equipment, Net, by Type
Premises and equipment, gross	$ 10	9
Fixed assets in progress
Premises and Equipment, Net, by Type
Premises and equipment, gross	43	40
Right-of-use asset
Premises and Equipment, Net, by Type
Premises and equipment, gross	$ 23	$ 22
Leasehold improvements | Minimum
Premises and Equipment, Net, by Type
Estimated useful lives	5 years
Leasehold improvements | Maximum
Premises and Equipment, Net, by Type
Estimated useful lives	10 years

Premises and Equipment - Narrat

Premises and Equipment - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 64	$ 59	$ 50

Mortgage Servicing Rights - Sch

Mortgage Servicing Rights - Schedule of Changes in the Fair Value of Residential First Mortgage MSRs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Asset at Fair Value
Balance at beginning of period	$ 291
Fair value of MSRs at end of period	329	$ 291
Residential first mortgage
Servicing Asset at Fair Value
Balance at beginning of period	291	290	$ 291
Additions from loans sold with servicing retained	268	223	356
Reductions from sales	(71)	(57)	(339)
Decrease in MSR fair value due to pay-offs, pay-downs, run-off, model changes and other	(109)	(89)	(20)
Changes in estimates of fair value due to interest rate risk	(50)	(76)	2
Fair value of MSRs at end of period	$ 329	$ 291	$ 290

Mortgage Servicing Rights - Sum

Mortgage Servicing Rights - Summary of Adverse Changes to Weighted-Average Assumptions on the Fair Value of Servicing Rights (Details) - Mortgage servicing rights - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Actual
Option adjusted spread (in percentage)	7.98%	5.34%
Constant prepayment rate (in percentage)	10.53%	10.59%
Weighted average cost to service per loan (in USD per share)	$ 81.24	$ 84.41
Fair value impact due to 10% adverse change
Option adjusted spread	$ 321	$ 284
Constant prepayment rate	305	271
Weighted average cost to service per loan (in dollars per share)	325	285
Fair value impact due to 20% adverse change
Option adjusted spread	313	280
Constant prepayment rate	283	257
Weighted average cost to service per loan (in dollars per share)	$ 321	$ 282

Mortgage Servicing Rights - S_2

Mortgage Servicing Rights - Summary of Income and Fees (Details) - Residential first mortgage - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Assets at Fair Value
Decrease in MSR fair value due to pay-offs, pay-downs, run-off, model changes and other	$ (109)	$ (89)	$ (20)
Changes in fair value due to interest rate risk	(50)	(76)	2
Net (loss) return on mortgage servicing rights
Servicing Assets at Fair Value
Servicing fees, ancillary income and late fees	107	96	65
Decrease in MSR fair value due to pay-offs, pay-downs, run-off, model changes and other	(109)	(89)	(20)
Changes in fair value due to interest rate risk	(50)	(76)	2
Gain (loss) on MSR derivatives	65	76	(5)
Net transaction costs	(3)	(1)	(6)
Total return (loss) included in net return on mortgage servicing rights	10	6	36
Loan administration income
Servicing Assets at Fair Value
Servicing fees, ancillary income and late fees	126	106	54
Charges on subserviced custodial balances	(29)	(67)	(29)
Other servicing charges	(13)	(9)	(2)
Total income on mortgage loans subserviced, included in loan administration	$ 84	$ 30	$ 23

Derivative Financial Instrume_3

Derivative Financial Instruments - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized losses on derivatives classified as cash flow hedges, net-of-tax	$ 5,000,000	$ 0	$ 2,000,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months	(3,000,000)
Right to claim cash	114,000,000	63,000,000
Maintenance margin on centrally cleared derivatives	30,000,000
Custodial deposits
Derivative Instruments, Gain (Loss) [Line Items]
Reclassifications out of AOCI	2,000,000	0
Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Right to claim cash	94,000,000	63,000,000
Obligation to receive cash irrespective of position	84,000,000	34,000,000
Derivatives not designated as hedging instruments | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	14,163,000,000	7,137,000,000
Derivatives designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Right to claim cash	14,000,000	29,000,000
Derivatives designated as hedging instruments | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount		300,000,000
AFS securities
Derivative Instruments, Gain (Loss) [Line Items]
Losses on fair value hedging instruments	2,000,000
FLHB advances | Carrying Value | Derivatives designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Hedged asset, fair value hedge	0	200,000,000
Interest rate swaps on AFS securities
Derivative Instruments, Gain (Loss) [Line Items]
Closed portfolio and beneficial interest, last-of-layer, amortized cost	1,612,000,000	289,000,000
Hedged asset, fair value hedge, last-of-layer, amount	1,615,000,000	291,000,000
Interest rate swaps on AFS securities | Derivatives designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Hedged asset, fair value hedge, cumulative increase (decrease)	6,000,000	1,000,000
Hedged asset, fair value hedge, last-of-layer, amount	450,000,000	100,000,000
Right to claim cash	5,000,000
Interest rate swaps on AFS securities | Derivatives designated as hedging instruments | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount		100,000,000
Interest rate swaps on AFS securities | Carrying Value | Derivatives designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Hedged asset, fair value hedge	1,680,000,000
Interest rate swaps on custodial deposits | Derivatives designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Right to claim cash	8,000,000
Interest rate swaps on custodial deposits | Derivatives designated as hedging instruments | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount		200,000,000
Interest rate swaps on custodial deposits | Carrying Value | Derivatives designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Hedged asset, fair value hedge		287,000,000
Interest rate swaps on HFI residential first mortgages | Derivatives designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Hedged asset, fair value hedge	240,000,000	$ 0
Hedged asset, fair value hedge, cumulative increase (decrease)	1,000,000
Right to claim cash	1,000,000
Interest rate swaps on HFI residential first mortgages | Derivatives designated as hedging instruments | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	$ 100,000,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Notional Amount, Estimated Fair Value and Maturity of Derivative Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivatives designated as hedging instruments
Liabilities
Fair Value	$ 1
Derivatives designated as hedging instruments | Other liabilities
Liabilities
Notional Amount	1,350
Fair Value	1
Derivatives designated as hedging instruments | Other assets
Asset
Notional Amount		$ 300
Fair Value		0
Derivatives designated as hedging instruments | Interest rate swaps on custodial deposits
Liabilities
Fair Value	1
Derivatives designated as hedging instruments | Interest rate swaps on custodial deposits | Other liabilities
Liabilities
Notional Amount	800
Fair Value	1
Derivatives designated as hedging instruments | Interest rate swaps on custodial deposits | Other assets
Asset
Notional Amount		200
Fair Value		0
Derivatives designated as hedging instruments | Interest rate swaps on HFI residential first mortgages
Liabilities
Fair Value	0
Derivatives designated as hedging instruments | Interest rate swaps on HFI residential first mortgages | Other liabilities
Liabilities
Notional Amount	100
Fair Value	0
Derivatives designated as hedging instruments | Interest rate swaps on HFI residential first mortgages | Other assets
Asset
Notional Amount	100
Derivatives designated as hedging instruments | Interest rate swaps on AFS securities
Liabilities
Fair Value	0
Derivatives designated as hedging instruments | Interest rate swaps on AFS securities | Other liabilities
Liabilities
Notional Amount	450
Fair Value	0
Derivatives designated as hedging instruments | Interest rate swaps on AFS securities | Other assets
Asset
Notional Amount		100
Fair Value		0
Derivatives not designated as hedging instruments
Liabilities
Fair Value	102	17
Asset
Fair Value	73	28
Derivatives not designated as hedging instruments | Other liabilities
Liabilities
Notional Amount	12,614	7,640
Fair Value	102	18
Derivatives not designated as hedging instruments | Other assets
Asset
Notional Amount	14,163	7,137
Fair Value	281	62
Derivatives not designated as hedging instruments | Futures | Other assets
Asset
Notional Amount	1,346	550
Fair Value	0	0
Derivatives not designated as hedging instruments | Mortgage-backed securities forwards
Liabilities
Fair Value	98	9
Asset
Fair Value	14	2
Derivatives not designated as hedging instruments | Mortgage-backed securities forwards | Other liabilities
Liabilities
Notional Amount	11,194	5,749
Fair Value	98	9
Derivatives not designated as hedging instruments | Mortgage-backed securities forwards | Other assets
Asset
Notional Amount	749	1,918
Fair Value	14	2
Derivatives not designated as hedging instruments | Rate lock commitments | Other liabilities
Liabilities
Notional Amount	115	229
Fair Value	0	1
Derivatives not designated as hedging instruments | Rate lock commitments | Other assets
Asset
Notional Amount	10,587	3,870
Fair Value	208	34
Derivatives not designated as hedging instruments | Interest rate swaps and swaptions
Liabilities
Fair Value	4	8
Derivatives not designated as hedging instruments | Interest rate swaps and swaptions | Other liabilities
Liabilities
Notional Amount	1,305	1,662
Fair Value	4	8
Derivatives not designated as hedging instruments | Interest rate swaps and swaptions | Other assets
Asset
Notional Amount	1,481
Fair Value	59
Derivatives not designated as hedging instruments | Interest rate swaps
Asset
Fair Value	$ 59	26
Derivatives not designated as hedging instruments | Interest rate swaps | Other assets
Asset
Notional Amount		799
Fair Value		$ 26

Derivative Financial Instrume_5

Derivative Financial Instruments - Derivatives Subject to a Master Netting Arrangement (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Liabilities
Gross amounts not offset in the statement of financial position, cash collateral	$ 114	$ 63
Derivatives designated as hedging instruments
Liabilities
Gross Amount	1
Gross Amounts Netted in the Statements of Financial Position	0
Net Amount Presented in the Statements of Financial Position	1
Gross amounts not offset in the statement of financial position, financial instrument	0
Gross amounts not offset in the statement of financial position, cash collateral	14	29
Derivatives designated as hedging instruments | Interest rate swaps on AFS securities
Liabilities
Gross Amount	0
Gross Amounts Netted in the Statements of Financial Position	0
Net Amount Presented in the Statements of Financial Position	0
Gross amounts not offset in the statement of financial position, financial instrument	0
Gross amounts not offset in the statement of financial position, cash collateral	5
Derivatives designated as hedging instruments | Interest rate swaps on HFI residential first mortgages
Liabilities
Gross Amount	0
Gross Amounts Netted in the Statements of Financial Position	0
Net Amount Presented in the Statements of Financial Position	0
Gross amounts not offset in the statement of financial position, financial instrument	0
Gross amounts not offset in the statement of financial position, cash collateral	1
Derivatives designated as hedging instruments | Interest rate swaps on custodial deposits
Liabilities
Gross Amount	1
Gross Amounts Netted in the Statements of Financial Position	0
Net Amount Presented in the Statements of Financial Position	1
Gross amounts not offset in the statement of financial position, financial instrument	0
Gross amounts not offset in the statement of financial position, cash collateral	8
Derivatives not designated as hedging instruments
Liabilities
Gross Amount	102	17
Gross Amounts Netted in the Statements of Financial Position	0	0
Net Amount Presented in the Statements of Financial Position	102	17
Gross amounts not offset in the statement of financial position, financial instrument	0	0
Gross amounts not offset in the statement of financial position, cash collateral	94	63
Asset
Gross Amount	73	28
Gross Amounts Netted in the Statements of Financial Position	0	0
Net Amount Presented in the Statements of Financial Position	73	28
Gross amounts not offset in the statement of financial position, financial instrument	0	0
Gross amounts not offset in the statement of financial position, cash collateral	6	0
Derivatives not designated as hedging instruments | Mortgage-backed securities forwards
Liabilities
Gross Amount	98	9
Gross Amounts Netted in the Statements of Financial Position	0	0
Net Amount Presented in the Statements of Financial Position	98	9
Gross amounts not offset in the statement of financial position, financial instrument	0	0
Gross amounts not offset in the statement of financial position, cash collateral	68	24
Asset
Gross Amount	14	2
Gross Amounts Netted in the Statements of Financial Position	0	0
Net Amount Presented in the Statements of Financial Position	14	2
Gross amounts not offset in the statement of financial position, financial instrument	0	0
Gross amounts not offset in the statement of financial position, cash collateral	0	0
Derivatives not designated as hedging instruments | Interest rate swaps
Asset
Gross Amount	59	26
Gross Amounts Netted in the Statements of Financial Position	0	0
Net Amount Presented in the Statements of Financial Position	59	26
Gross amounts not offset in the statement of financial position, financial instrument	0	0
Gross amounts not offset in the statement of financial position, cash collateral	6	0
Derivatives not designated as hedging instruments | Interest rate swaps and swaptions
Liabilities
Gross Amount	4	8
Gross Amounts Netted in the Statements of Financial Position	0	0
Net Amount Presented in the Statements of Financial Position	4	8
Gross amounts not offset in the statement of financial position, financial instrument	0	0
Gross amounts not offset in the statement of financial position, cash collateral	$ 26	$ 39

Derivative Financial Instrume_6

Derivative Financial Instruments - Net Gain (Loss) Recognized in Income on Derivative Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Futures | Net return on mortgage servicing rights
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 1	$ (2)	$ (4)
Interest rate swaps and swaptions | Net return on mortgage servicing rights
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	28	57	1
Mortgage-backed securities forwards | Net return on mortgage servicing rights
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	36	21	(2)
Rate lock commitments and MSR forwards | Net gain on loan sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	86	35	(31)
Forward commitments | Other noninterest income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	0	2	0
Interest rate swaps | Other noninterest income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	3	5	3
Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 154	$ 118	$ (33)

Deposit Accounts - Summary of D

Deposit Accounts - Summary of Deposit Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deposits
Total deposits	$ 19,973	$ 15,146
Branch retail deposits
Deposits
Savings accounts	3,437	3,030
Demand deposit accounts	1,726	1,318
Certificates of deposit/CDARS	1,355	2,353
Money market demand accounts	490	495
Total deposits	7,008	7,196
Commercial deposits
Deposits
Savings accounts	461	342
Demand deposit accounts	2,294	1,438
Money market demand accounts	208	188
Total deposits	2,963	1,968
Retail deposits
Deposits
Total deposits	9,971	9,164
Government deposits
Deposits
Savings accounts	778	495
Demand deposit accounts	529	360
Certificates of deposit/CDARS	458	358
Total deposits	1,765	1,213
Wholesale deposits
Deposits
Total deposits	1,031	633
Custodial deposits
Deposits
Total deposits	$ 7,206	$ 4,136

Deposit Accounts - Scheduled Ma

Deposit Accounts - Scheduled Maturities for Certificates of Deposit (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Contractual Maturities, Certificates of Deposit, $100,000 or More
Three months or less	$ 220	$ 223
Over three months to six months	220	238
Over six months to twelve months	153	278
One to two years	71	101
Thereafter	19	35
Total	$ 683	$ 875

Borrowings - Breakdown of FHLB

Borrowings - Breakdown of FHLB Advances and Other Borrowings Outstanding (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances, Branch of FHLB Bank
Federal home loan bank, advances, maturities summary, due in next twelve months	$ 3,900	$ 4,165
FHLB, interest rate	1.03%	1.45%
FHLB, non-current	$ 1,200	$ 650
Total	5,100	4,815
Short-term fixed rate term advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank
Federal home loan bank, advances, maturities summary, due in next rolling twelve months	$ 3,415	$ 3,695
FHLB, interest rate	0.20%	1.61%
Other short-term borrowings
Federal Home Loan Bank, Advances, Branch of FHLB Bank
Federal home loan bank, advances, maturities summary, due in next rolling twelve months	$ 485	$ 470
FHLB, interest rate	0.08%	1.64%

Borrowings - Detailed Informati

Borrowings - Detailed Information on FHLB Advances and Other Borrowings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal Home Loan Bank, Advances, Activity for Year
Maximum outstanding at any month end	$ 6,841	$ 5,005	$ 5,740
Average outstanding balance	3,873	3,064	4,713
Average remaining borrowing capacity	$ 5,282	$ 4,194	$ 2,089
Weighted average interest rate	0.72%	1.90%	1.96%

Borrowings - Maturity Dates of

Borrowings - Maturity Dates of FHLB Advances and Other Borrowings (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances by Interest Rate Type, by Maturity
2021	$ 3,900	$ 4,165
2022	200
2023	500
2024	100
Thereafter	400
Total	$ 5,100	$ 4,815

Borrowings - Summary of Long-Te

Borrowings - Summary of Long-Term Debt, Net of Debt Issuance Costs (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument
Trust Preferred Securities	$ 247	$ 247
Total other long-term debt	641	496
Senior notes, matures 2021
Debt Instrument
Senior Notes	$ 246	$ 249
Senior notes interest rate	6.125%	6.125%
Notes, matures 2030
Debt Instrument
Subordinated Notes	$ 148	$ 0
Senior notes interest rate	4.125%	0.00%
Plus 3.25%, matures 2032
Debt Instrument
Trust Preferred Securities	$ 26	$ 26
Trust preferred securities interest rate	3.50%	5.20%
Plus 3.25%, matures 2033
Debt Instrument
Trust Preferred Securities	$ 26	$ 26
Trust preferred securities interest rate	3.49%	5.24%
Plus 3.25%, matures 2033
Debt Instrument
Trust Preferred Securities	$ 26	$ 26
Trust preferred securities interest rate	3.49%	5.21%
Plus 2.00%, matures 2035
Debt Instrument
Trust Preferred Securities	$ 26	$ 26
Trust preferred securities interest rate	2.24%	3.99%
Plus 2.00%, matures 2035
Debt Instrument
Trust Preferred Securities	$ 26	$ 26
Trust preferred securities interest rate	2.24%	3.99%
Plus 1.75%, matures 2035
Debt Instrument
Trust Preferred Securities	$ 51	$ 51
Trust preferred securities interest rate	1.97%	3.64%
Plus 1.50%, matures 2035
Debt Instrument
Trust Preferred Securities	$ 25	$ 25
Trust preferred securities interest rate	1.74%	3.49%
Plus 1.45%, matures 2037
Debt Instrument
Trust Preferred Securities	$ 25	$ 25
Trust preferred securities interest rate	1.67%	3.34%
Plus 2.50%, matures 2037
Debt Instrument
Trust Preferred Securities	$ 16	$ 16
Trust preferred securities interest rate	2.72%	4.39%

Borrowings - Narrative (Details

Borrowings - Narrative (Details)	Jul. 11, 2016USD ($)	Dec. 31, 2020USD ($)trustSubsidiary	Oct. 28, 2020USD ($)	Dec. 31, 2019
Federal Home Loan Bank, Advances
Number of trust subsidiaries | trustSubsidiary		9
Payment of interest on trust preferred securities		$ 0
Senior notes maturing in 2021
Federal Home Loan Bank, Advances
Senior notes interest rate		6.125%		6.125%
Notes, matures 2030
Federal Home Loan Bank, Advances
Senior notes interest rate		4.125%		0.00%
Senior notes | Senior notes maturing in 2021
Federal Home Loan Bank, Advances
Debt instrument face amount	$ 250,000,000
Redemption price percentage	100.00%
Senior notes | Senior notes maturing in 2021 | Treasury rate
Federal Home Loan Bank, Advances
Variable rate on spread	0.50%
Subordinated notes | Notes, matures 2030
Federal Home Loan Bank, Advances
Debt instrument face amount			$ 150,000,000
Senior notes interest rate			4.125%

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss)
Beginning balance	$ 1,788	$ 1,570	$ 1,399
Other comprehensive income (loss), net of tax	46	48	(31)
Ending balance	2,201	1,788	1,570
Investment Securities
Accumulated Other Comprehensive Income (Loss)
Beginning balance	1	(47)	(18)
Unrealized gain (loss)	68	57	(30)
Less: Tax provision (benefit)	16	14	(7)
Net unrealized gain (loss)	52	43	(23)
Reclassifications out of AOCI	(1)	6	(1)
Less: Tax provision (benefit)	0	1	0
Net unrealized (loss) gain reclassified out of AOCI	(1)	5	(1)
Reclassification of certain income tax effects	0	0	(5)
Other comprehensive income (loss), net of tax	51	48	(29)
Ending balance	52	1	(47)
Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss)
Beginning balance	0	0	2
Unrealized gain (loss)	(9)	0	27
Less: Tax provision (benefit)	(2)	0	7
Net unrealized gain (loss)	(7)	0	20
Reclassifications out of AOCI	2	0	(30)
Less: Tax provision (benefit)	0	0	(8)
Net unrealized (loss) gain reclassified out of AOCI	2	0	(22)
Other comprehensive income (loss), net of tax	(5)	0	(2)
Ending balance	$ (5)	$ 0	$ 0

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share of Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 154	$ 222	$ 116	$ 46	$ 58	$ 63	$ 61	$ 36	$ 538	$ 218	$ 187
Weighted Average Shares
Weighted average common shares outstanding (in shares)									56,094,542	56,584,238	57,520,289
Effect of dilutive securities
Stock-based awards (in shares)									411,271	654,740	802,661
Weighted average diluted common shares (in shares)									56,505,813	57,238,978	58,322,950
Earnings per common share
Basic income (loss) per share (in usd per share)	$ 2.86	$ 3.90	$ 2.04	$ 0.80	$ 1.01	$ 1.12	$ 1.08	$ 0.64	$ 9.59	$ 3.85	$ 3.26
Effect of dilutive securities
Stock-based awards (in usd per share)									(0.07)	(0.05)	(0.05)
Diluted earnings per common share (in usd per share)	$ 2.83	$ 3.88	$ 2.03	$ 0.80	$ 1	$ 1.11	$ 1.06	$ 0.63	$ 9.52	$ 3.80	$ 3.21

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($) $ in Millions	Mar. 20, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jul. 01, 2017
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 15	$ 10	$ 9
Unrecognized stock based compensation expense		$ 17
Period to be recognized		1 year 8 months 12 days
2006 plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 17	$ 13	$ 11
2006 plan | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options available for future grants (in shares)		1,300,000
LTIP | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
2018 ExLTIP II | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
2017 ESPP | Employee stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)		350,054			800,000
Number of shares issued (in shares)		181,875	106,881
Share-based payment arrangement, tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage		0.3333%
Share-based payment arrangement, tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage		0.3333%
Share-based payment arrangement, tranche three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage		0.3333%

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock and Restricted Stock Units - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Non-vested balance at beginning of period (in shares)	1,399,127	1,620,568	1,290,450
Granted (in shares)	379,835	338,737	875,352
Vested (in shares)	(537,571)	(379,936)	(401,379)
Canceled and forfeited (in shares)	(267,205)	(180,242)	(143,855)
Non-vested balance at end of period (in shares)	974,186	1,399,127	1,620,568
Weighted Average Grant-Date Fair Value per Share
Non-vested balance at beginning of period (in USD per share)	$ 28.72	$ 27.27	$ 20.52
Granted (in USD per share)	27.97	32.11	34.32
Vested (in USD per share)	27.06	26.98	23.04
Canceled and forfeited (in USD per share)	23.13	25.66	21.46
Non-vested balance at end of period (in USD per share)	$ 30.88	$ 28.72	$ 27.27

Income Taxes - Components of th

Income Taxes - Components of the Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal									$ 154	$ 17	$ 0
State									14	6	1
Total current income tax expense									168	23	1
Deferred
Federal									(10)	39	47
State									8	(14)	(3)
Total deferred income tax expense									(2)	25	44
Total income tax expense	$ 51	$ 73	$ 32	$ 10	$ 11	$ 15	$ 14	$ 8	$ 166	$ 48	$ 45

Income Taxes - Summary of Diffe

Income Taxes - Summary of Differences Between the Effective Tax Rate and the Statutory Federal Tax Rate (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount
Provision at statutory federal income tax rate									$ 148	$ 56	$ 49
Bank owned life insurance									(2)	(2)	(2)
State income tax (benefit), net of federal income tax effect (net of valuation allowance release)									18	(6)	(2)
Low income housing tax losses									(1)	(1)	(1)
Other									3	1	1
Total income tax expense	$ 51	$ 73	$ 32	$ 10	$ 11	$ 15	$ 14	$ 8	$ 166	$ 48	$ 45
Effective tax provision rate									23.50%	18.10%	19.40%

Income Taxes - Temporary Differ

Income Taxes - Temporary Differences and Carryforwards Giving Rise to DTAs and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets
Net operating loss carryforwards (Federal and State)	$ 36	$ 43
Allowance for credit losses	58	26
Accrued compensation	15	12
Litigation settlement	8	9
Lease liability	6	6
Contingent consideration	7	4
General business reserves	11	2
Other	4	11
Total	145	113
Valuation allowance	(7)	(5)
Total net	138	108
Deferred tax liabilities
Mark-to-market adjustments	(4)	(12)
Premises and equipment	(7)	(7)
State and local taxes	(6)	(7)
Commercial lease financing	(1)	(5)
Mortgage loan servicing rights	(53)	(5)
Right of use asset	(5)	(6)
Total	(76)	(42)
Net deferred tax asset	$ 62	$ 66

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards
Temporary differences related to provision for loan losses not expected to reverse therefore not included in deferred tax assets	$ 4
Total state net operating loss carryforwards	393
Valuation allowance	7	$ 5
Maximum
Operating Loss Carryforwards
Income tax penalties and interest expense (less than)	1	1	$ 1
Federal
Operating Loss Carryforwards
Operating loss carryforwards	51	$ 68
State and Local Jurisdiction
Operating Loss Carryforwards
Total state deferred tax asset	28
Operating loss carryforwards, amount subject to annual use limitation	21
Valuation allowance	$ 7

Regulatory Capital (Details)

Regulatory Capital (Details) $ in Millions	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Tier 1 Capital
Tier 1 capital (to adjusted avg. total assets), actual amount	$ 2,270	$ 1,720
Tier 1 capital (to adjusted tangible assets), actual ratio (in percentage)	0.0771	0.0757
Tier 1 capital, minimum capital amount	$ 1,178	$ 909
Tier 1 capital (to adjusted tangible assets), minimum capital ratio (in percentage)	0.040	0.040
Tier 1 capital, well-capitalized under prompt corrective action provisions amount	$ 1,472	$ 1,136
Tier 1 capital (to adjusted tangible assets), well-capitalized under prompt corrective action provisions ratio (in percentage)	0.050	0.050
Common Equity Tier 1 Capital
Common equity Tier 1 capital (to RWA), actual amount	$ 2,030	$ 1,480
Common equity Tier 1 capital (to RWA), actual ratio (in percentage)	9.15%	9.32%
Common equity Tier 1 capital (to RWA), minimum capital amount	$ 999	$ 715
Common equity Tier 1 capital (to RWA), minimum capital ratio (in percentage)	4.50%	4.50%
Common equity Tier 1 capital (to RWA), well-capitalized under prompt corrective action provisions amount	$ 1,442	$ 1,033
Common equity Tier 1 capital (to RWA), well-capitalized under prompt corrective action provisions ratio (in percentage)	6.50%	6.50%
Tier One Risk Based Capital
Tier 1 capital, actual amount	$ 2,270	$ 1,720
Tier 1 capital (to risk weighted assets), actual ratio (in percentage)	0.1023	0.1083
Tier 1 capital, minimum capital amount	$ 1,331	$ 953
Tier 1 capital (to risk weighted assets), minimum capital ratio (in percentage)	0.060	0.060
Tier 1 capital, well-capitalized under prompt corrective action provisions amount	$ 1,775	$ 1,271
Tier 1 capital (to risk weighted assets), well-capitalized under prompt corrective action provisions ratio (in percentage)	0.080	0.080
Capital
Total capital, actual amount	$ 2,638	$ 1,830
Total capital (to risk weighted assets), actual ratio (in percentage)	0.1189	0.1152
Total capital, minimum capital amount	$ 1,775	$ 1,271
Total capital (to risk weighted assets), minimum capital ratio (in percentage)	0.080	0.080
Total capital, well-capitalized under prompt corrective action provisions amount	$ 2,219	$ 1,589
Total capital (to risk weighted assets), well-capitalized under prompt corrective action provisions ratio (in percentage)	0.100	0.100
Flagstar Bank
Tier 1 Capital
Tier 1 capital (to adjusted avg. total assets), actual amount	$ 2,390	$ 1,752
Tier 1 capital (to adjusted tangible assets), actual ratio (in percentage)	0.0812	0.0771
Tier 1 capital, minimum capital amount	$ 1,177	$ 909
Tier 1 capital (to adjusted tangible assets), minimum capital ratio (in percentage)	0.040	0.040
Tier 1 capital, well-capitalized under prompt corrective action provisions amount	$ 1,472	$ 1,136
Tier 1 capital (to adjusted tangible assets), well-capitalized under prompt corrective action provisions ratio (in percentage)	0.050	0.050
Common Equity Tier 1 Capital
Common equity Tier 1 capital (to RWA), actual amount	$ 2,390	$ 1,752
Common equity Tier 1 capital (to RWA), actual ratio (in percentage)	10.77%	11.04%
Common equity Tier 1 capital (to RWA), minimum capital amount	$ 999	$ 714
Common equity Tier 1 capital (to RWA), minimum capital ratio (in percentage)	4.50%	4.50%
Common equity Tier 1 capital (to RWA), well-capitalized under prompt corrective action provisions amount	$ 1,443	$ 1,032
Common equity Tier 1 capital (to RWA), well-capitalized under prompt corrective action provisions ratio (in percentage)	6.50%	6.50%
Tier One Risk Based Capital
Tier 1 capital, actual amount	$ 2,390	$ 1,752
Tier 1 capital (to risk weighted assets), actual ratio (in percentage)	0.1077	0.1104
Tier 1 capital, minimum capital amount	$ 1,332	$ 952
Tier 1 capital (to risk weighted assets), minimum capital ratio (in percentage)	0.060	0.060
Tier 1 capital, well-capitalized under prompt corrective action provisions amount	$ 1,775	$ 1,270
Tier 1 capital (to risk weighted assets), well-capitalized under prompt corrective action provisions ratio (in percentage)	0.080	0.080
Capital
Total capital, actual amount	$ 2,608	$ 1,862
Total capital (to risk weighted assets), actual ratio (in percentage)	0.1175	0.1173
Total capital, minimum capital amount	$ 1,775	$ 1,270
Total capital (to risk weighted assets), minimum capital ratio (in percentage)	0.080	0.080
Total capital, well-capitalized under prompt corrective action provisions amount	$ 2,219	$ 1,587
Total capital (to risk weighted assets), well-capitalized under prompt corrective action provisions ratio (in percentage)	0.100	0.100

Legal Proceedings, Contingenc_3

Legal Proceedings, Contingencies and Commitments - Narrative (Details) $ in Millions	Feb. 24, 2012USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Loss Contingency, Settlement
Tier 1 capital (to adjusted tangible assets), well-capitalized under prompt corrective action provisions ratio (in percentage)		0.050	0.050
Business acquisition threshold (in percentage)		33.30%
Accrued reserve for contingent liabilities		$ 7	$ 3
Letter of credit reserve		28	$ 3
Supplemental executive retirement plan liability		$ 16
Flagstar Bank
Loss Contingency, Settlement
Tier 1 capital (to adjusted tangible assets), well-capitalized under prompt corrective action provisions ratio (in percentage)		0.050	0.050
DOJ agreement
Loss Contingency, Settlement
Litigation settlement payment amount	$ 118	$ 118
Accrued reserve for contingent liabilities			$ 35
DOJ agreement | Flagstar Bank
Loss Contingency, Settlement
Tier 1 capital (to adjusted tangible assets), well-capitalized under prompt corrective action provisions ratio (in percentage)	0.11	0.11
DOJ agreement | Subsequent payments
Loss Contingency, Settlement
Litigation expense	$ 25

Legal Proceedings, Contingenc_4

Legal Proceedings, Contingencies and Commitments - Summary of the Contractual Amount of Significant Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Mortgage loan commitments including interest rate locks
Commitments
Standby and commercial letters of credit	$ 10,702	$ 4,099
Warehouse loan commitments
Commitments
Standby and commercial letters of credit	2,849	1,944
Commercial and industrial commitments
Commitments
Standby and commercial letters of credit	1,271	1,107
Other construction commitments
Commitments
Standby and commercial letters of credit	1,934	2,015
HELOC commitments
Commitments
Standby and commercial letters of credit	544	558
Other consumer commitments
Commitments
Standby and commercial letters of credit	121	175
Standby and commercial letters of credit
Commitments
Standby and commercial letters of credit	$ 95	$ 82

Fair Value Measurements - Finan

Fair Value Measurements - Financial Instruments Carried at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets, Fair Value Disclosure
Investment securities available-for-sale	$ 1,944	$ 2,116
Loans held-for-sale	7,009	5,219
Loans held-for-investment	13	12
Mortgage servicing rights	329	291
Total assets at fair value	7,021	5,231
Agency - Commercial
Assets, Fair Value Disclosure
Investment securities available-for-sale	1,061	947
Agency - Residential
Assets, Fair Value Disclosure
Investment securities available-for-sale	735	1,015
Municipal obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	28	31
Corporate debt obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	77	77
Certificates of deposit
Assets, Fair Value Disclosure
Investment securities available-for-sale	1	1
Total fair value
Assets, Fair Value Disclosure
Investment securities available-for-sale	1,944	2,116
Loans held-for-sale	7,098	5,258
Loans held-for-investment	16,188	12,031
Mortgage servicing rights	329	291
Liabilities, Fair Value Disclosure
Contingent consideration		(10)
Total fair value | Level 1
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Loans held-for-sale	0	0
Loans held-for-investment	0	0
Mortgage servicing rights	0	0
Liabilities, Fair Value Disclosure
Contingent consideration		0
Total fair value | Level 2
Assets, Fair Value Disclosure
Investment securities available-for-sale	1,944	2,116
Loans held-for-sale	7,098	5,258
Loans held-for-investment	11	10
Mortgage servicing rights	0	0
Liabilities, Fair Value Disclosure
Contingent consideration		0
Total fair value | Level 3
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Loans held-for-sale	0	0
Loans held-for-investment	16,177	12,021
Mortgage servicing rights	329	291
Liabilities, Fair Value Disclosure
Contingent consideration		(10)
Recurring | Level 1
Assets, Fair Value Disclosure
Mortgage servicing rights	0	0
Total assets at fair value	0	0
Liabilities, Fair Value Disclosure
DOJ Liability	0	0
Total liabilities at fair value	0	0
Recurring | Level 1 | Rate lock commitments
Assets, Fair Value Disclosure
Derivative assets	0	0
Liabilities, Fair Value Disclosure
Derivative liabilities		0
Recurring | Level 1 | Mortgage-backed securities forwards
Assets, Fair Value Disclosure
Derivative assets	0	0
Liabilities, Fair Value Disclosure
Derivative liabilities	0	0
Recurring | Level 1 | Interest rate swaps and swaptions
Assets, Fair Value Disclosure
Derivative assets	0	0
Liabilities, Fair Value Disclosure
Derivative liabilities	0
Recurring | Level 1 | Interest rate swaps
Liabilities, Fair Value Disclosure
Derivative liabilities		0
Recurring | Level 1 | Contingent consideration
Liabilities, Fair Value Disclosure
Contingent consideration		0
Recurring | Level 1 | Agency - Commercial
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 1 | Agency - Residential
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 1 | Municipal obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 1 | Corporate debt obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 1 | Other MBS
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 1 | Certificates of deposit
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 2
Assets, Fair Value Disclosure
Mortgage servicing rights	0	0
Total assets at fair value	9,037	7,373
Liabilities, Fair Value Disclosure
DOJ Liability	0	0
Total liabilities at fair value	(102)	(17)
Recurring | Level 2 | Rate lock commitments
Assets, Fair Value Disclosure
Derivative assets	0	0
Liabilities, Fair Value Disclosure
Derivative liabilities		0
Recurring | Level 2 | Mortgage-backed securities forwards
Assets, Fair Value Disclosure
Derivative assets	14	2
Liabilities, Fair Value Disclosure
Derivative liabilities	(98)	(9)
Recurring | Level 2 | Interest rate swaps and swaptions
Assets, Fair Value Disclosure
Derivative assets	59	26
Liabilities, Fair Value Disclosure
Derivative liabilities	(4)
Recurring | Level 2 | Interest rate swaps
Liabilities, Fair Value Disclosure
Derivative liabilities		(8)
Recurring | Level 2 | Contingent consideration
Liabilities, Fair Value Disclosure
Contingent consideration		0
Recurring | Level 2 | Agency - Commercial
Assets, Fair Value Disclosure
Investment securities available-for-sale	1,061	947
Recurring | Level 2 | Agency - Residential
Assets, Fair Value Disclosure
Investment securities available-for-sale	735	1,015
Recurring | Level 2 | Municipal obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	28	31
Recurring | Level 2 | Corporate debt obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	77	77
Recurring | Level 2 | Other MBS
Assets, Fair Value Disclosure
Investment securities available-for-sale	42	45
Recurring | Level 2 | Certificates of deposit
Assets, Fair Value Disclosure
Investment securities available-for-sale	1	1
Recurring | Level 3
Assets, Fair Value Disclosure
Mortgage servicing rights	329	291
Total assets at fair value	539	327
Liabilities, Fair Value Disclosure
DOJ Liability	(35)	(35)
Total liabilities at fair value	(35)	(46)
Recurring | Level 3 | Rate lock commitments
Assets, Fair Value Disclosure
Derivative assets	208	34
Liabilities, Fair Value Disclosure
Derivative liabilities		(1)
Recurring | Level 3 | Mortgage-backed securities forwards
Assets, Fair Value Disclosure
Derivative assets	0	0
Liabilities, Fair Value Disclosure
Derivative liabilities	0	0
Recurring | Level 3 | Interest rate swaps and swaptions
Assets, Fair Value Disclosure
Derivative assets	0	0
Liabilities, Fair Value Disclosure
Derivative liabilities	0
Recurring | Level 3 | Interest rate swaps
Liabilities, Fair Value Disclosure
Derivative liabilities		0
Recurring | Level 3 | Contingent consideration
Liabilities, Fair Value Disclosure
Contingent consideration		(10)
Recurring | Level 3 | Agency - Commercial
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 3 | Agency - Residential
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 3 | Municipal obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 3 | Corporate debt obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 3 | Other MBS
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Level 3 | Certificates of deposit
Assets, Fair Value Disclosure
Investment securities available-for-sale	0	0
Recurring | Total fair value
Assets, Fair Value Disclosure
Mortgage servicing rights	329	291
Total assets at fair value	9,576	7,700
Liabilities, Fair Value Disclosure
DOJ Liability	(35)	(35)
Total liabilities at fair value	(137)	(63)
Recurring | Total fair value | Rate lock commitments
Assets, Fair Value Disclosure
Derivative assets	208	34
Liabilities, Fair Value Disclosure
Derivative liabilities		(1)
Recurring | Total fair value | Mortgage-backed securities forwards
Assets, Fair Value Disclosure
Derivative assets	14	2
Liabilities, Fair Value Disclosure
Derivative liabilities	(98)	(9)
Recurring | Total fair value | Interest rate swaps and swaptions
Assets, Fair Value Disclosure
Derivative assets	59	26
Liabilities, Fair Value Disclosure
Derivative liabilities	(4)
Recurring | Total fair value | Interest rate swaps
Liabilities, Fair Value Disclosure
Derivative liabilities		(8)
Recurring | Total fair value | Contingent consideration
Liabilities, Fair Value Disclosure
Contingent consideration		(10)
Recurring | Total fair value | Agency - Commercial
Assets, Fair Value Disclosure
Investment securities available-for-sale	1,061	947
Recurring | Total fair value | Agency - Residential
Assets, Fair Value Disclosure
Investment securities available-for-sale	735	1,015
Recurring | Total fair value | Municipal obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	28	31
Recurring | Total fair value | Corporate debt obligations
Assets, Fair Value Disclosure
Investment securities available-for-sale	77	77
Recurring | Total fair value | Other MBS
Assets, Fair Value Disclosure
Investment securities available-for-sale	42	45
Recurring | Total fair value | Certificates of deposit
Assets, Fair Value Disclosure
Investment securities available-for-sale	1	1
Home equity | Recurring | Level 1
Assets, Fair Value Disclosure
Loans held-for-investment	0	0
Home equity | Recurring | Level 2
Assets, Fair Value Disclosure
Loans held-for-investment	0	0
Home equity | Recurring | Level 3
Assets, Fair Value Disclosure
Loans held-for-investment	2	2
Home equity | Recurring | Total fair value
Assets, Fair Value Disclosure
Loans held-for-investment	2	2
Residential first mortgage | Recurring | Level 1
Assets, Fair Value Disclosure
Loans held-for-sale	0	0
Loans held-for-investment	0	0
Residential first mortgage | Recurring | Level 2
Assets, Fair Value Disclosure
Loans held-for-sale	7,009	5,219
Loans held-for-investment	11	10
Residential first mortgage | Recurring | Level 3
Assets, Fair Value Disclosure
Loans held-for-sale	0	0
Loans held-for-investment	0	0
Residential first mortgage | Recurring | Total fair value
Assets, Fair Value Disclosure
Loans held-for-sale	7,009	5,219
Loans held-for-investment	$ 11	$ 10

Fair Value Measurements - Roll

Fair Value Measurements - Roll Forward of Financial Instruments (Details) - Level 3 - Recurring - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets, Unobservable Input Reconciliation
Balance at Beginning of Year	$ 327	$ 312	$ 319
Total gains/(losses) recorded in earnings	199	(79)	(52)
Purchases / Originations	1,273	549	591
Sales	(71)	(57)	(339)
Settlement	0	0	2
Transfers In (Out)	1,189	398	205
Balance at End of Year	539	327	312
Liabilities, Unobservable Input Reconciliation
Balance at Beginning of Year	(45)	(66)	(85)
Total gains/(losses) recorded in earnings	(17)	18	13
Purchases / Originations	0	0	0
Sales	0	0	0
Settlement	27	3	6
Transfers In (Out)	0	0	0
Balance at End of Year	(35)	(45)	(66)
Home equity
Assets, Unobservable Input Reconciliation
Balance at Beginning of Year	2	2	4
Total gains/(losses) recorded in earnings	0	0	0
Purchases / Originations	0	0	0
Sales	0	0	0
Settlement	0	0	2
Transfers In (Out)	0	0	0
Balance at End of Year	2	2	2
Mortgage servicing rights
Assets, Unobservable Input Reconciliation
Balance at Beginning of Year	291	290	291
Total gains/(losses) recorded in earnings	(159)	(165)	(18)
Purchases / Originations	268	223	356
Sales	(71)	(57)	(339)
Settlement	0	0	0
Transfers In (Out)	0	0	0
Balance at End of Year	329	291	290
Rate lock commitments
Assets, Unobservable Input Reconciliation
Balance at Beginning of Year	34	20	24
Total gains/(losses) recorded in earnings	358	86	(34)
Purchases / Originations	1,005	326	235
Sales	0	0	0
Settlement	0	0	0
Transfers In (Out)	1,189	398	205
Balance at End of Year	208	34	20
DOJ Liability
Liabilities, Unobservable Input Reconciliation
Balance at Beginning of Year	(35)	(60)	(60)
Total gains/(losses) recorded in earnings	0	25	0
Purchases / Originations	0	0	0
Sales	0	0	0
Settlement	0	0	0
Transfers In (Out)	0	0	0
Balance at End of Year	(35)	(35)	(60)
Contingent consideration
Liabilities, Unobservable Input Reconciliation
Balance at Beginning of Year	(10)	(6)	(25)
Total gains/(losses) recorded in earnings	(17)	(7)	13
Purchases / Originations	0	0	0
Sales	0	0	0
Settlement	27	3	6
Transfers In (Out)	0	0	0
Balance at End of Year	$ 0	$ (10)	$ (6)

Fair Value Measurements - Quant

Fair Value Measurements - Quantitative Information about Recurring Level 3 Fair Value Financial Instruments (Details) - Recurring - Level 3 $ in Millions	Dec. 31, 2020USD ($)discountRatePerLoanoptionAdjustedSpreadPerLoanconstantPrepaymentRatePerLoanconstant_default_rate_per_loan$ / loanorginationPull-throughRatePerLoan	Dec. 31, 2019USD ($)constantPrepaymentRatePerLoandiscountRatePerLoanconstant_default_rate_per_loan$ / loanorginationPull-throughRatePerLoanoptionAdjustedSpreadPerLoan
Home equity
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held-for-investment | $	$ 2	$ 2
Home equity | Discount rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held for investment, fair value input (in percentage) | discountRatePerLoan	0.072	0.072
Home equity | Discount rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held for investment, fair value input (in percentage) | discountRatePerLoan	0.108	0.108
Home equity | Discount rate | Weighted average
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held for investment, fair value input (in percentage) | discountRatePerLoan	0.090	0.090
Home equity | Constant prepayment rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held for investment, fair value input (in percentage) | constantPrepaymentRatePerLoan	0.126	0.130
Home equity | Constant prepayment rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held for investment, fair value input (in percentage) | constantPrepaymentRatePerLoan	0.189	0.195
Home equity | Constant prepayment rate | Weighted average
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held for investment, fair value input (in percentage) | constantPrepaymentRatePerLoan	0.158	0.162
Home equity | Constant default rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held for investment, fair value input (in percentage) | constant_default_rate_per_loan	0.015	0.027
Home equity | Constant default rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held for investment, fair value input (in percentage) | constant_default_rate_per_loan	0.023	0.040
Home equity | Constant default rate | Weighted average
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Loans held for investment, fair value input (in percentage) | constant_default_rate_per_loan	0.019	0.033
Mortgage servicing rights
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Mortgage servicing rights | $	$ 329	$ 291
Mortgage servicing rights | Constant prepayment rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Weighted average cost to service per loan (in dollars per loan) | constantPrepaymentRatePerLoan	0	0
Mortgage servicing rights | Constant prepayment rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Weighted average cost to service per loan (in dollars per loan) | constantPrepaymentRatePerLoan	0.133	0.123
Mortgage servicing rights | Constant prepayment rate | Weighted average
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Weighted average cost to service per loan (in dollars per loan) | constantPrepaymentRatePerLoan	0.105	0.106
Mortgage servicing rights | Option adjusted spread | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Weighted average cost to service per loan (in dollars per loan) | optionAdjustedSpreadPerLoan	0.034	0.024
Mortgage servicing rights | Option adjusted spread | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Weighted average cost to service per loan (in dollars per loan) | optionAdjustedSpreadPerLoan	0.212	0.204
Mortgage servicing rights | Option adjusted spread | Weighted average
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Weighted average cost to service per loan (in dollars per loan) | optionAdjustedSpreadPerLoan	0.080	0.053
Mortgage servicing rights | Weighted average cost to service per loan | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Weighted average cost to service per loan (in dollars per loan) | $ / loan	67	67
Mortgage servicing rights | Weighted average cost to service per loan | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Weighted average cost to service per loan (in dollars per loan) | $ / loan	95	95
Mortgage servicing rights | Weighted average cost to service per loan | Weighted average
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Weighted average cost to service per loan (in dollars per loan) | $ / loan	81	84
Rate lock commitments
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Derivative assets | $	$ 208	$ 34
Rate lock commitments | Closing pull-through rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Rate lock commitment, fair value input (in percentage) | orginationPull-throughRatePerLoan	0.757
Rate lock commitments | Closing pull-through rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Rate lock commitment, fair value input (in percentage) | orginationPull-throughRatePerLoan	0.872
Rate lock commitments | Closing pull-through rate | Weighted average
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Rate lock commitment, fair value input (in percentage) | orginationPull-throughRatePerLoan	0.775
Rate lock commitments | Origination pull-through rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Rate lock commitment, fair value input (in percentage) | orginationPull-throughRatePerLoan		0.800
Rate lock commitments | Origination pull-through rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Rate lock commitment, fair value input (in percentage) | orginationPull-throughRatePerLoan		0.872
Rate lock commitments | Origination pull-through rate | Weighted average
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Rate lock commitment, fair value input (in percentage) | orginationPull-throughRatePerLoan		0.815
DOJ Liability
Fair Value Inputs, Assets and Liabilities, Quantitative Information
DOJ Liability | $	$ (35)	$ (35)
Contingent consideration
Fair Value Inputs, Assets and Liabilities, Quantitative Information
Contingent consideration | $		$ (10)

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Accrued reserve for contingent liabilities	$ 7	$ 3
DOJ agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loss contingency accrual, period increase (decrease)		25
Accrued reserve for contingent liabilities		$ 35
Measurement input, expected term | Residential mortgage servicing rights capitalized | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Weighted-average life	4 years 2 months 12 days	4 years 1 month 6 days

Fair Value Measurements - Asset

Fair Value Measurements - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans held-for-sale	$ 7,009				$ 5,219				$ 7,009	$ 5,219
Total assets at fair value	7,021				5,231				7,021	5,231
Totals	232	$ 346	$ 303	$ 90	101	$ 110	$ 75	$ 49	971	335	$ 200
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans held-for-sale					6					6
Total assets at fair value	119				30				119	30
Fair value gains (losses) on loans										(1)
Totals									(7)	(9)
Nonrecurring | Repossessed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Repossessed assets	8				10				8	10
Fair value gains (losses) on repossessed assets									(3)	(3)
Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans held-for-sale					6					6
Total assets at fair value	30				6				30	6
Nonrecurring | Level 2 | Repossessed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Repossessed assets	0				0				0	0
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans held-for-sale					0					0
Total assets at fair value	89				24				89	24
Nonrecurring | Level 3 | Repossessed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Repossessed assets	8				10				8	10
Nonrecurring | Level 3 | Commercial loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Commercial loans									57
Residential first mortgage | Nonrecurring | Residential first mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Residential first mortgage loans									30
Impaired loans held-for-investment	24				14				24	14
Fair value gains (losses) on loans									(1)	(5)
Residential first mortgage | Nonrecurring | Impaired first mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value gains (losses) on loans									(3)
Residential first mortgage | Nonrecurring | Level 2 | Residential first mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Residential first mortgage loans									30
Impaired loans held-for-investment	0				0				0	0
Residential first mortgage | Nonrecurring | Level 3 | Residential first mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Residential first mortgage loans									0
Impaired loans held-for-investment	$ 24				$ 14				24	$ 14
Commercial loans | Nonrecurring | Commercial loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Commercial loans									57
Fair value gains (losses) on loans									0
Commercial loans | Nonrecurring | Level 2 | Commercial loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Commercial loans									0
Commercial loans | Nonrecurring | Level 3 | Commercial loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Commercial loans									$ 57

Fair Value Measurements - Qua_2

Fair Value Measurements - Quantitative Information about Nonrecurring Level 3 Fair Value Financial Instruments (Details) - Nonrecurring - Level 3 $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)loss_severity_discount_per_loan	Dec. 31, 2019USD ($)loss_severity_discount_per_loan
Commercial loans
Fair Value Inputs, Assets, Quantitative Information
Commercial loans | $	$ 57
Residential first mortgage
Fair Value Inputs, Assets, Quantitative Information
Loans held-for-investment | $	24	$ 14
Repossessed assets
Fair Value Inputs, Assets, Quantitative Information
Loans held-for-investment | $	$ 8	$ 10
Loss severity discount | Residential first mortgage | Minimum
Fair Value Inputs, Assets, Quantitative Information
Loans held for investment, fair value input (in percentage)	0	0.25
Loss severity discount | Residential first mortgage | Maximum
Fair Value Inputs, Assets, Quantitative Information
Loans held for investment, fair value input (in percentage)	1	0.30
Loss severity discount | Residential first mortgage | Weighted average
Fair Value Inputs, Assets, Quantitative Information
Loans held for investment, fair value input (in percentage)	0.128	0.259
Loss severity discount | Repossessed assets | Minimum
Fair Value Inputs, Assets, Quantitative Information
Repossessed asset, fair value input (as a percent)	0	0
Loss severity discount | Repossessed assets | Maximum
Fair Value Inputs, Assets, Quantitative Information
Repossessed asset, fair value input (as a percent)	0.963	1
Loss severity discount | Repossessed assets | Weighted average
Fair Value Inputs, Assets, Quantitative Information
Repossessed asset, fair value input (as a percent)	0.245	0.171

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Investment securities available-for-sale	$ 1,944	$ 2,116
Investment securities held-to-maturity	393	599
Loans held-for-sale	7,009	5,219
Loans held-for-investment	13	12
Mortgage servicing rights	329	291
Total fair value
Assets
Cash and cash equivalents	623	426
Investment securities available-for-sale	1,944	2,116
Investment securities held-to-maturity	393	599
Loans held-for-sale	7,098	5,258
Loans held-for-investment	16,188	12,031
Loans with government guarantees	2,498	707
Mortgage servicing rights	329	291
Federal Home Loan Bank stock	377	303
Bank owned life insurance	358	349
Repossessed assets	8	10
Other assets, foreclosure claims	17	45
Derivative financial instruments	281	88
Liabilities
Federal Home Loan Bank advances	(5,124)	(4,816)
Long-term debt	(596)	(462)
DOJ litigation settlement	(35)	(35)
Contingent consideration		(10)
Derivative financial instruments	102	(44)
Total fair value | Demand deposits and savings accounts
Liabilities
Deposits	(7,864)	(6,050)
Total fair value | Certificates of deposit
Liabilities
Deposits	(1,365)	(2,368)
Total fair value | Wholesale deposits
Liabilities
Deposits	(1,047)	(640)
Total fair value | Government deposits
Liabilities
Deposits	(1,706)	(1,156)
Total fair value | Custodial deposits
Liabilities
Deposits	(7,133)	(4,066)
Total fair value | Level 1
Assets
Cash and cash equivalents	623	426
Investment securities available-for-sale	0	0
Investment securities held-to-maturity	0	0
Loans held-for-sale	0	0
Loans held-for-investment	0	0
Loans with government guarantees	0	0
Mortgage servicing rights	0	0
Federal Home Loan Bank stock	0	0
Bank owned life insurance	0	0
Repossessed assets	0	0
Other assets, foreclosure claims	0	0
Derivative financial instruments	0	0
Liabilities
Federal Home Loan Bank advances	0	0
Long-term debt	0	0
DOJ litigation settlement	0	0
Contingent consideration		0
Derivative financial instruments	0	0
Total fair value | Level 1 | Demand deposits and savings accounts
Liabilities
Deposits	0	0
Total fair value | Level 1 | Certificates of deposit
Liabilities
Deposits	0	0
Total fair value | Level 1 | Wholesale deposits
Liabilities
Deposits	0	0
Total fair value | Level 1 | Government deposits
Liabilities
Deposits	0	0
Total fair value | Level 1 | Custodial deposits
Liabilities
Deposits	0	0
Total fair value | Level 2
Assets
Cash and cash equivalents	0	0
Investment securities available-for-sale	1,944	2,116
Investment securities held-to-maturity	393	599
Loans held-for-sale	7,098	5,258
Loans held-for-investment	11	10
Loans with government guarantees	2,498	707
Mortgage servicing rights	0	0
Federal Home Loan Bank stock	377	303
Bank owned life insurance	358	349
Repossessed assets	0	0
Other assets, foreclosure claims	17	45
Derivative financial instruments	73	54
Liabilities
Federal Home Loan Bank advances	(5,124)	(4,816)
Long-term debt	(596)	(462)
DOJ litigation settlement	0	0
Contingent consideration		0
Derivative financial instruments	102	(43)
Total fair value | Level 2 | Demand deposits and savings accounts
Liabilities
Deposits	(7,864)	(6,050)
Total fair value | Level 2 | Certificates of deposit
Liabilities
Deposits	(1,365)	(2,368)
Total fair value | Level 2 | Wholesale deposits
Liabilities
Deposits	(1,047)	(640)
Total fair value | Level 2 | Government deposits
Liabilities
Deposits	(1,706)	(1,156)
Total fair value | Level 2 | Custodial deposits
Liabilities
Deposits	(7,133)	(4,066)
Total fair value | Level 3
Assets
Cash and cash equivalents	0	0
Investment securities available-for-sale	0	0
Investment securities held-to-maturity	0	0
Loans held-for-sale	0	0
Loans held-for-investment	16,177	12,021
Loans with government guarantees	0	0
Mortgage servicing rights	329	291
Federal Home Loan Bank stock	0	0
Bank owned life insurance	0	0
Repossessed assets	8	10
Other assets, foreclosure claims	0	0
Derivative financial instruments	208	34
Liabilities
Federal Home Loan Bank advances	0	0
Long-term debt	0	0
DOJ litigation settlement	(35)	(35)
Contingent consideration		(10)
Derivative financial instruments	0	(1)
Total fair value | Level 3 | Demand deposits and savings accounts
Liabilities
Deposits	0	0
Total fair value | Level 3 | Certificates of deposit
Liabilities
Deposits	0	0
Total fair value | Level 3 | Wholesale deposits
Liabilities
Deposits	0	0
Total fair value | Level 3 | Government deposits
Liabilities
Deposits	0	0
Total fair value | Level 3 | Custodial deposits
Liabilities
Deposits	0	0
Carrying Value
Assets
Cash and cash equivalents	623	426
Investment securities available-for-sale	1,944	2,116
Investment securities held-to-maturity	377	598
Loans held-for-sale	7,098	5,258
Loans held-for-investment	16,227	12,129
Loans with government guarantees	2,516	736
Mortgage servicing rights	329	291
Federal Home Loan Bank stock	377	303
Bank owned life insurance	356	349
Repossessed assets	8	10
Other assets, foreclosure claims	17	45
Derivative financial instruments	281	62
Liabilities
Federal Home Loan Bank advances	(5,100)	(4,815)
Long-term debt	(641)	(496)
DOJ litigation settlement	(35)	(35)
Contingent consideration		(10)
Derivative financial instruments	102	(18)
Carrying Value | Demand deposits and savings accounts
Liabilities
Deposits	(8,616)	(6,811)
Carrying Value | Certificates of deposit
Liabilities
Deposits	(1,355)	(2,353)
Carrying Value | Wholesale deposits
Liabilities
Deposits	(1,031)	(633)
Carrying Value | Government deposits
Liabilities
Deposits	(1,765)	(1,213)
Carrying Value | Custodial deposits
Liabilities
Deposits	$ (7,206)	$ (4,136)

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Fair Value Included in Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans held-for-sale | Net gain on loan sales
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Net gain on loan sales	$ 1,204	$ 348	$ (29)
Loans held-for-investment | Other noninterest income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Net gain on loan sales	0	1	0
DOJ Liability | Other noninterest income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Net gain on loan sales	$ 0	$ 25	$ 0

Fair Value Measurements - Diffe

Fair Value Measurements - Differences Between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding (Details) - USD ($) $ in Millions	Feb. 24, 2012	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Option, Quantitative Disclosures
Assets, unpaid principal balance (UPB)		$ 6,727	$ 5,073
Total assets at fair value		7,021	5,231
Assets, fair value over/(under) UPB		294	158
DOJ agreement
Fair Value, Option, Quantitative Disclosures
Litigation settlement payment amount	$ 118	118
Loans held-for-sale
Fair Value, Option, Quantitative Disclosures
Assets, unpaid principal balance (UPB)		6,713	5,060
Total assets at fair value		7,009	5,219
Assets, fair value over/(under) UPB		296	159
Loans held-for-investment
Fair Value, Option, Quantitative Disclosures
Assets, unpaid principal balance (UPB)		14	13
Total assets at fair value		12	12
Assets, fair value over/(under) UPB		(2)	(1)
DOJ Liability
Fair Value, Option, Quantitative Disclosures
Liabilities, unpaid principal balance (UPB)		(118)	(118)
Long-term debt, fair value		(35)	(35)
Liabilities, fair value over/(under) UPB		83	83
Nonperforming
Fair Value, Option, Quantitative Disclosures
Assets, unpaid principal balance (UPB)		18	8
Total assets at fair value		15	7
Assets, fair value over/(under) UPB		(3)	(1)
Nonperforming | Loans held-for-sale
Fair Value, Option, Quantitative Disclosures
Assets, unpaid principal balance (UPB)		9	3
Total assets at fair value		7	3
Assets, fair value over/(under) UPB		(2)	0
Nonperforming | Loans held-for-investment
Fair Value, Option, Quantitative Disclosures
Assets, unpaid principal balance (UPB)		9	5
Total assets at fair value		8	4
Assets, fair value over/(under) UPB		(1)	(1)
Performing
Fair Value, Option, Quantitative Disclosures
Assets, unpaid principal balance (UPB)		6,709	5,065
Total assets at fair value		7,006	5,224
Assets, fair value over/(under) UPB		297	159
Performing | Loans held-for-sale
Fair Value, Option, Quantitative Disclosures
Assets, unpaid principal balance (UPB)		6,704	5,057
Total assets at fair value		7,002	5,216
Assets, fair value over/(under) UPB		298	159
Performing | Loans held-for-investment
Fair Value, Option, Quantitative Disclosures
Assets, unpaid principal balance (UPB)		5	8
Total assets at fair value		4	8
Assets, fair value over/(under) UPB		$ (1)	$ 0

Segment Information (Details)

Segment Information (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2020USD ($)segment	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information
Number of business segments | segment									3
Summary of Operations
Net interest income	$ 189	$ 180	$ 168	$ 148	$ 152	$ 146	$ 138	$ 126	$ 685	$ 562	$ 497
Provision (benefit) for credit losses	2	32	102	14	0	1	17	0	149	18	(8)
Net interest income after provision (benefit) for credit losses	187	148	66	134	152	145	121	126	536	544	505
Net gain on loan sales	232	346	303	90	101	110	75	49	971	335	200
Loan fees and charges									165	100	87
Net return on mortgage servicing rights									10	6	36
Loan administration income									84	30	23
Other noninterest income									95	139	93
Total noninterest income									1,325	610	439
Compensation and benefits									466	377	318
Commissions									232	111	80
Loan processing expense									98	80	59
Other noninterest expense									361	320	255
Total noninterest expense									1,157	888	712
Income before indirect overhead allocations and income taxes									704	266	232
Indirect overhead allocation (expense) income									0	0	0
Provision (benefit) for income taxes	51	73	32	10	11	15	14	8	166	48	45
Net income (loss)	$ 154	$ 222	$ 116	$ 46	$ 58	$ 63	$ 61	$ 36	538	218	187
Average balances
Loans held-for-sale									5,542	3,952	4,196
Loans with government guarantees									1,571	553	303
Loans held-for-investment									13,997	10,932	8,419
Total assets									26,908	20,674	17,980
Deposits									18,544	14,708	10,775
Intersegment eliminations
Summary of Operations
Intersegment (expense) revenue									105	(36)	(30)
Intersegment eliminations | Community Banking
Summary of Operations
Intersegment (expense) revenue									(96)	(3)	10
Intersegment eliminations | Mortgage Originations
Summary of Operations
Intersegment (expense) revenue									(48)	13	1
Intersegment eliminations | Mortgage Servicing
Summary of Operations
Intersegment (expense) revenue									39	26	19
Operating segments | Community Banking
Summary of Operations
Net interest income									570	410	272
Provision (benefit) for credit losses									3	20	2
Net interest income after provision (benefit) for credit losses									567	390	270
Net gain on loan sales									2	(14)	(1)
Loan fees and charges									1	1	0
Net return on mortgage servicing rights									0	0	0
Loan administration income									(3)	(3)	(2)
Other noninterest income									61	62	45
Total noninterest income									61	46	42
Compensation and benefits									108	103	70
Commissions									2	2	2
Loan processing expense									5	6	4
Other noninterest expense									271	165	101
Total noninterest expense									386	276	177
Income before indirect overhead allocations and income taxes									242	160	135
Indirect overhead allocation (expense) income									(40)	(41)	(39)
Provision (benefit) for income taxes									42	24	20
Net income (loss)									160	95	76
Average balances
Loans held-for-sale									1	0	0
Loans with government guarantees									0	0	0
Loans held-for-investment									11,376	7,876	5,576
Total assets									11,760	8,319	5,760
Deposits									10,996	10,301	8,580
Operating segments | Mortgage Originations
Summary of Operations
Net interest income									191	145	170
Provision (benefit) for credit losses									(11)	2	2
Net interest income after provision (benefit) for credit losses									202	143	168
Net gain on loan sales									969	349	201
Loan fees and charges									98	67	62
Net return on mortgage servicing rights									10	6	36
Loan administration income									(35)	(24)	(15)
Other noninterest income									8	12	15
Total noninterest income									1,050	410	299
Compensation and benefits									161	111	105
Commissions									230	109	78
Loan processing expense									55	36	26
Other noninterest expense									136	90	66
Total noninterest expense									582	346	275
Income before indirect overhead allocations and income taxes									670	207	192
Indirect overhead allocation (expense) income									(60)	(42)	(68)
Provision (benefit) for income taxes									128	35	27
Net income (loss)									482	130	97
Average balances
Loans held-for-sale									5,541	3,952	4,196
Loans with government guarantees									1,571	553	303
Loans held-for-investment									2,591	3,027	2,814
Total assets									10,735	8,467	8,253
Deposits									0	0	0
Operating segments | Mortgage Servicing
Summary of Operations
Net interest income									18	16	7
Provision (benefit) for credit losses									0	0	0
Net interest income after provision (benefit) for credit losses									18	16	7
Net gain on loan sales									0	0	0
Loan fees and charges									66	32	25
Net return on mortgage servicing rights									0	0	0
Loan administration income									151	124	69
Other noninterest income									0	0	0
Total noninterest income									217	156	94
Compensation and benefits									46	28	19
Commissions									0	0	0
Loan processing expense									36	36	26
Other noninterest expense									79	59	44
Total noninterest expense									161	123	89
Income before indirect overhead allocations and income taxes									74	49	12
Indirect overhead allocation (expense) income									(19)	(18)	(20)
Provision (benefit) for income taxes									12	6	(2)
Net income (loss)									43	25	(6)
Average balances
Loans held-for-sale									0	0	0
Loans with government guarantees									0	0	0
Loans held-for-investment									0	0	0
Total assets									85	47	34
Deposits									6,712	3,851	1,883
Corporate and reconciling items
Summary of Operations
Net interest income									(94)	(9)	48
Provision (benefit) for credit losses									157	(4)	(12)
Net interest income after provision (benefit) for credit losses									(251)	(5)	60
Net gain on loan sales									0	0	0
Loan fees and charges									0	0	0
Net return on mortgage servicing rights									0	0	0
Loan administration income									(29)	(67)	(29)
Other noninterest income									26	65	33
Total noninterest income									(3)	(2)	4
Compensation and benefits									151	135	124
Commissions									0	0	0
Loan processing expense									2	2	3
Other noninterest expense									(125)	6	44
Total noninterest expense									28	143	171
Income before indirect overhead allocations and income taxes									(282)	(150)	(107)
Indirect overhead allocation (expense) income									119	101	127
Provision (benefit) for income taxes									(16)	(17)	0
Net income (loss)									(147)	(32)	20
Average balances
Loans held-for-sale									0	0	0
Loans with government guarantees									0	0	0
Loans held-for-investment									30	29	29
Total assets									4,328	3,841	3,933
Deposits									$ 836	$ 556	$ 312

Holding Company Only Financia_3

Holding Company Only Financial Statements - Condensed Unconsolidated Statements of Financial Condition (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 623	$ 426
Other assets	1,250	930
Total assets	31,038	23,266
Liabilities
Long-term debt	641	496
Other liabilities	1,272	951
Total liabilities	28,837	21,478
Stockholders’ Equity
Common stock	1	1
Additional paid in capital	1,346	1,483
Accumulated other comprehensive income	47	1
Retained earnings	807	303
Total stockholders’ equity	2,201	1,788	$ 1,570	$ 1,399
Total liabilities and stockholders’ equity	31,038	23,266
Parent company
Assets
Cash and cash equivalents	304	233	$ 201	$ 196
Investment in subsidiaries	2,551	2,031
Other assets	17	47
Total assets	2,872	2,311
Liabilities
Long-term debt	641	496
Other liabilities	30	27
Total liabilities	671	523
Stockholders’ Equity
Common stock	1	1
Additional paid in capital	1,346	1,483
Accumulated other comprehensive income	47	1
Retained earnings	807	303
Total stockholders’ equity	2,201	1,788
Total liabilities and stockholders’ equity	2,872	2,311
Unconsolidated trusts	$ 7	$ 7

Holding Company Only Financia_4

Holding Company Only Financial Statements - Condensed Unconsolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income
Total interest income	$ 212	$ 206	$ 201	$ 201	$ 213	$ 203	$ 198	$ 180	$ 819	$ 794	$ 683
Expenses
Interest	23	26	33	53	61	57	60	54	134	232	186
Income before income taxes	205	295	148	56	69	78	75	44	704	266	232
Provision (benefit) for income taxes	51	73	32	10	11	15	14	8	166	48	45
Net income	$ 154	$ 222	$ 116	$ 46	$ 58	$ 63	$ 61	$ 36	538	218	187
Other comprehensive loss									46	48	(31)
Comprehensive income									584	266	156
Parent company
Income
Interest									2	4	1
Cash dividends received from subsidiaries									82	100	0
Total interest income									84	104	1
Expenses
Interest									25	28	27
General and administrative									14	6	7
Total									39	34	34
Net income (loss) before undistributed income of subsidiaries									45	70	(33)
Equity in undistributed income of subsidiaries									484	142	212
Income before income taxes									529	212	179
Provision (benefit) for income taxes									(9)	(6)	(8)
Net income									538	218	187
Other comprehensive loss									46	48	(31)
Comprehensive income									$ 584	$ 266	$ 156

Holding Company Only Financia_5

Holding Company Only Financial Statements - Condensed Unconsolidated Statements of Cash Flow (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activities
Net income		$ 154	$ 222	$ 116	$ 46	$ 58	$ 63	$ 61	$ 36	$ 538	$ 218	$ 187
Adjustments to reconcile net income to net cash used in operating activities:
Other										(763)	(205)	(87)
Net cash used in operating activities										(8,029)	(17,083)	(23,378)
Investing Activities
Net cash provided by investing activities										2,986	12,688	24,607
Financing Activities
Stock repurchase										(150)	(50)	0
Repayment of long-term debt										(3)	0	0
Proceeds from issuance of subordinated debt										150	0	0
Subordinated debt issuance costs										(2)	0	0
Net cash provided by (used in) by financing activities										5,241	4,419	(1,020)
Net increase (decrease) in cash, cash equivalents and restricted cash	[1]									198	24	209
Cash and cash equivalents, beginning of year					426					426
Cash and cash equivalents, end of year		623				426				623	426
Parent company
Operating Activities
Net income										538	218	187
Adjustments to reconcile net income to net cash used in operating activities:
Equity in undistributed income of subsidiaries										(566)	(241)	(177)
Dividends received from subsidiaries										82	104	0
Other										34	10	(5)
Net cash used in operating activities										88	91	5
Investing Activities
Net cash provided by investing activities										0	0	0
Financing Activities
Stock repurchase										(150)	(50)	0
Repayment of long-term debt										(4)	0	0
Proceeds from issuance of subordinated debt										150	0	0
Subordinated debt issuance costs										(2)	0	0
Dividends declared and paid										(11)	(9)	0
Net cash provided by (used in) by financing activities										(17)	(59)	0
Net increase (decrease) in cash, cash equivalents and restricted cash										71	32	5
Cash and cash equivalents, beginning of year					$ 233				$ 201	233	201	196
Cash and cash equivalents, end of year		$ 304				$ 233				$ 304	$ 233	$ 201
[1]	For further information on restricted cash, see Note 11 - Derivatives.

Quarterly Financial Data (Una_3

Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 212	$ 206	$ 201	$ 201	$ 213	$ 203	$ 198	$ 180	$ 819	$ 794	$ 683
Interest expense	23	26	33	53	61	57	60	54	134	232	186
Net interest income	189	180	168	148	152	146	138	126	685	562	497
Provision (benefit) for credit losses	2	32	102	14	0	1	17	0	149	18	(8)
Net interest income after provision (benefit) for credit losses	187	148	66	134	152	145	121	126	536	544	505
Net gain on loan sales	232	346	303	90	101	110	75	49	971	335	200
Loan fees and charges	53	45	41	26	30	29	24	17	165	100	87
Net return (loss) on mortgage servicing rights	0	12	(8)	6	(3)	(2)	5	6	10	6	36
Loan administration (expense) income	25	26	21	12	8	5	6	11
Deposit fees and charges	8	8	7	9	10	10	10	8	32	38	21
Other noninterest income	19	15	14	14	16	19	48	18	63	101	72
Noninterest expense	319	305	296	235	245	238	214	191	1,157	888	712
Income before income taxes	205	295	148	56	69	78	75	44	704	266	232
Provision for income taxes	51	73	32	10	11	15	14	8	166	48	45
Net income	$ 154	$ 222	$ 116	$ 46	$ 58	$ 63	$ 61	$ 36	$ 538	$ 218	$ 187
Basic income (loss) per share (in usd per share)	$ 2.86	$ 3.90	$ 2.04	$ 0.80	$ 1.01	$ 1.12	$ 1.08	$ 0.64	$ 9.59	$ 3.85	$ 3.26
Diluted income per share (in usd per share)	$ 2.83	$ 3.88	$ 2.03	$ 0.80	$ 1	$ 1.11	$ 1.06	$ 0.63	$ 9.52	$ 3.80	$ 3.21