Flagstar Bancorp (FBC) 10-Q 5 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 01, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	FLAGSTAR BANCORP INC
Entity Central Index Key	1,033,012
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		57,627,630
Entity Emerging Growth Company	false
Entity Small Business	false

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash	$ 150	$ 122
Interest-earning deposits	114	82
Total cash and cash equivalents	264	204
Investment securities available-for-sale	1,857	1,853
Investment securities held-to-maturity	724	939
Loans held-for-sale ($4,815 and $4,300 measured at fair value, respectively)	4,835	4,321
Loans held-for-investment ($11 and $12 measured at fair value, respectively)	8,966	7,713
Loans with government guarantees	305	271
Less: allowance for loan losses	(134)	(140)
Total loans held-for-investment and loans with government guarantees, net	9,137	7,844
Mortgage servicing rights	313	291
Net deferred tax asset	111	136
Federal Home Loan Bank stock	303	303
Premises and equipment, net	360	330
Goodwill and intangible assets	70	21
Other assets	723	670
Total assets	18,697	16,912
Liabilities and Stockholders’ Equity
Noninterest bearing deposits	3,096	2,049
Interest bearing deposits	8,493	6,885
Total deposits	11,589	8,934
Short-term Federal Home Loan Bank advances	3,199	4,260
Long-term Federal Home Loan Bank advances	1,280	1,405
Other long-term debt	495	494
Other liabilities ($60 and $60 measured at fair value, respectively)	616	420
Total liabilities	17,179	15,513
Stockholders’ Equity
Common stock $0.01 par value, 80,000,000 and 80,000,000 shares authorized; 57,625,439 and 57,321,228 shares issued and outstanding, respectively	1	1
Additional paid in capital	1,519	1,512
Accumulated other comprehensive loss	(42)	(16)
Retained earnings/(accumulated deficit)	40	(98)
Total stockholders’ equity	1,518	1,399
Total liabilities and stockholders’ equity	$ 18,697	$ 16,912

Consolidated Statements of Fi_2

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Assets
Loans held-for-sale, fair value	$ 4,815	$ 4,300
Loans held-for-investment, fair value	11	12
Liabilities and Stockholders’ Equity
Other liabilities, fair value	$ 60	$ 60
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)	57,625,439	57,321,228
Common stock, shares outstanding (in shares)	57,625,439	57,321,228

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest Income
Loans	$ 161	$ 120	$ 436	$ 319
Investment securities	21	20	64	59
Interest-earning deposits and other	1	0	2	1
Total interest income	183	140	502	379
Interest Expense
Deposits	27	13	65	37
Short-term Federal Home Loan Bank advances and other	18	11	50	23
Long-term Federal Home Loan Bank advances	7	6	21	17
Other long-term debt	7	7	21	19
Total interest expense	59	37	157	96
Net interest income	124	103	345	283
Provision (benefit) for loan losses	(2)	2	(3)	4
Net interest income after provision (benefit) for loan losses	126	101	348	279
Noninterest Income
Net gain on loan sales	43	75	166	189
Loan fees and charges	23	23	67	58
Deposit fees and charges	5	5	15	14
Loan administration income	5	5	15	16
Net return on mortgage servicing rights	13	6	26	26
Other noninterest income	18	16	52	43
Total noninterest income	107	130	341	346
Noninterest Expense
Compensation and benefits	76	76	236	219
Commissions	21	23	64	49
Occupancy and equipment	31	28	91	75
Federal insurance premiums	6	5	18	12
Loan processing expense	14	15	43	41
Legal and professional expense	7	7	19	22
Other noninterest expense	18	17	52	47
Total noninterest expense	173	171	523	465
Income before income taxes	60	60	166	160
Provision for income taxes	12	20	33	52
Net income	$ 48	$ 40	$ 133	$ 108
Net income per share
Basic (in dollars per share)	$ 0.84	$ 0.71	$ 2.32	$ 1.90
Diluted (in dollars per share)	$ 0.83	$ 0.70	$ 2.28	$ 1.86
Weighted average shares outstanding
Basic (in shares)	57,600,360	57,162,025	57,483,802	57,062,696
Diluted (in shares)	58,332,598	58,186,593	58,301,920	58,133,296

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 48	$ 40	$ 133	$ 108
Other comprehensive income (loss), net of tax
Investment securities	(9)	1	(47)	3
Derivatives and hedging activities	(1)	0	21	(4)
Other comprehensive income (loss), net of tax	(10)	1	(26)	(1)
Comprehensive income	$ 38	$ 41	$ 107	$ 107

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions		Total	Common Stock	Additional Paid in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)
Beginning balance at Dec. 31, 2016		$ 1,336	$ 1	$ 1,503	$ (7)	$ (161)
Beginning balance, shares at Dec. 31, 2016			56,824,802
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		108				108
Total other comprehensive income (loss)		(1)			(1)
Shares issued from Employee Stock Purchase Plan, shares			19,897
Warrant exercise		4		4
Warrant exercise, shares			154,313
Stock-based compensation		4		4
Stock-based compensation, shares			182,524
Ending balance at Sep. 30, 2017		1,451	$ 1	1,511	(8)	(53)
Ending balance, shares at Sep. 30, 2017			57,181,536
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		40
Ending balance at Sep. 30, 2017		1,451	$ 1	1,511	(8)	(53)
Ending balance, shares at Sep. 30, 2017			57,181,536
Beginning balance at Dec. 31, 2017		1,399	$ 1	1,512	(16)	(98)
Beginning balance, shares at Dec. 31, 2017			57,321,228
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		133				133
Total other comprehensive income (loss)		(21)			(21)
Shares issued from Employee Stock Purchase Plan, shares			88,566
Stock-based compensation		7		7
Stock-based compensation, shares			215,645
Reclassification of certain income tax effects	[1]				(5)	5
Ending balance at Sep. 30, 2018		1,518	$ 1	1,519	(42)	40
Ending balance, shares at Sep. 30, 2018			57,625,439
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		48
Ending balance at Sep. 30, 2018		$ 1,518	$ 1	$ 1,519	$ (42)	$ 40
Ending balance, shares at Sep. 30, 2018			57,625,439
[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.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
Operating Activities
Net cash used in operating activities		$ (19,002)	$ (19,266)
Investing Activities
Proceeds from sale of AFS securities including loans that have been securitized		18,362	17,949
Collection of principal on investment securities AFS		152	158
Purchase of investment securities AFS and other		(48)	(593)
Collection of principal on investment securities HTM		72	116
Proceeds received from the sale of LHFI		4	78
Net origination, purchase, and principal repayments of LHFI		(695)	(1,231)
Purchase of bank owned life insurance		0	(50)
Net purchase of FHLB stock		0	(84)
Acquisition of premises and equipment, net of proceeds		(50)	(74)
Proceeds from the sale of MSRs		267	252
Other, net		(14)	4
Net cash provided by investing activities		18,050	16,525
Financing Activities
Net change in deposit accounts		2,040	361
Net change in short-term FHLB borrowings and other short-term debt		(1,061)	2,285
Proceeds from increases in FHLB long-term advances		200	150
Repayment of FHLB long-term advances		(325)	(50)
Net receipt of payments of loans serviced for others		140	24
Net receipt of escrow payments		25	19
Other		(6)	0
Net cash provided by financing activities		1,013	2,789
Net increase in cash, cash equivalents and restricted cash	[1]	61	48
Beginning cash, cash equivalents and restricted cash	[1]	223	208
Ending cash, cash equivalents and restricted cash	[1]	284	256
Supplemental disclosure of cash flow information
Non-cash reclassification of investment securities HTM to AFS		144	0
Non-cash reclassification of loans originated LHFI to LHFS		6	106
Non-cash reclassification of LHFS to AFS securities		18,360	17,657
MSRs resulting from sale or securitization of loans		283	178
Operating section supplemental disclosures
Cash proceeds from sales of LHFS		7,028	5,547
Origination, premium paid and purchase of LHFS, net of principal repayments		$ (26,038)	$ (24,518)
[1]	For further information on restricted cash, see Note 8 - Derivatives.

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying financial statements of Flagstar Bancorp, Inc. ("Flagstar," or the "Company"), including its wholly owned principal subsidiary, Flagstar Bank, FSB (the "Bank"), have been prepared using U.S. GAAP for interim financial statements. Where we say "we," "us," "our," the "Company," "Bancorp" or "Flagstar," we usually mean Flagstar Bancorp, Inc. However, in some cases, a reference to "we," "us," "our," the "Company" or "Flagstar" will include the Bank. These consolidated financial statements do not include all of the information and footnotes required by GAAP for a full year presentation and certain disclosures have been condensed or omitted in accordance with rules and regulations of the SEC. These interim financial statements are unaudited and include, in our opinion, all adjustments necessary for a fair statement of the results for the periods indicated, which are not necessarily indicative of results which may be expected for the full year. These consolidated financial statements and notes should be read in conjunction with the consolidated financial statements and footnotes thereto included in Part II, Item 8 of Exhibit 99.1 to our Current Report on Form 8-K dated June 1, 2018 ("June 1, 2018 Form 8-K Report"), which is available on our website, at flagstar.com, and on the SEC website, at sec.gov. Certain prior period amounts have been reclassified to conform to the current period presentation. Acquisitions On June 4, 2018, we signed a definitive agreement to acquire 52 Wells Fargo Bank branches in Indiana, Michigan, Wisconsin, and Ohio, with over $2 billion in deposits and over $100 million in loans. The transaction is subject to the satisfaction of customary closing conditions and is expected to close at the beginning of December 2018. On March 12, 2018, we closed the purchase of the mortgage loan warehouse business from Santander Bank, with $499 million outstanding warehouse loans and $1.7 billion in commitments. Additionally, on March 19, 2018, we completed the acquisition of eight Desert Community Bank branches in San Bernardino County, California, with $614 million in deposits and $59 million in loans. Together, these acquisitions increased goodwill and intangible assets by $51 million .

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The following table presents our investment securities: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Dollars in millions) September 30, 2018 Available-for-sale securities Agency - Commercial $ 1,142 $ — $ (48 ) $ 1,094 Agency - Residential 713 — (39 ) 674 Municipal obligations 33 — (1 ) 32 Corporate debt obligations 41 — — 41 Other MBS 16 — — 16 Total available-for-sale securities (1) $ 1,945 $ — $ (88 ) $ 1,857 Held-to-maturity securities Agency - Commercial $ 357 $ — $ (17 ) $ 340 Agency - Residential 367 — (17 ) 350 Total held-to-maturity securities (1) $ 724 $ — $ (34 ) $ 690 December 31, 2017 Available-for-sale securities Agency - Commercial $ 1,004 $ — $ (17 ) $ 987 Agency - Residential 811 — (17 ) 794 Municipal obligations 35 — (1 ) 34 Corporate debt obligations 37 1 — 38 Total available-for-sale securities (1) $ 1,887 $ 1 $ (35 ) $ 1,853 Held-to-maturity securities Agency - Commercial $ 526 $ — $ (9 ) $ 517 Agency - Residential 413 — (6 ) 407 Total held-to-maturity securities (1) $ 939 $ — $ (15 ) $ 924 (1) There were no securities of a single issuer, which are not governmental or government-sponsored, that exceeded 10 percent of stockholders’ equity at September 30, 2018 or December 31, 2017 . We evaluate AFS and HTM investment securities for OTTI on a quarterly basis. An OTTI is considered to have occurred when the fair value of a debt security is below its amortized costs and we (1) have the intent to sell the security, (2) will more likely than not be required to sell the security before recovery of its amortized cost, or (3) do not expect to recover the entire amortized cost basis of the security. Investments that have an OTTI are written down through a charge to earnings for the amount representing the credit loss on the security. Gains and losses related to all other factors are recognized in other comprehensive income (loss). Agency securities, which are either explicitly or implicitly backed by the federal government, comprised 97 percent of our total securities at September 30, 2018 . This factor is considered when evaluating our investment securities for OTTI. During the three and nine months ended September 30, 2018 and September 30, 2017 , we had no OTTI. Available-for-sale securities Securities available-for-sale are carried at fair value. Unrealized gains and losses on AFS securities, to the extent they are temporary in nature, are reported as a component of other comprehensive income. We purchased $43 million and $48 million of AFS securities, which were comprised of U.S. government sponsored agency MBS and corporate debt obligations during the three and nine months ended September 30, 2018 , respectively. In addition, we retained zero and $16 million of passive interests in our own private MBS during the three and nine months ended September 30, 2018 , respectively. We purchased $300 million and $600 million of AFS securities, which included U.S. government sponsored agency MBS, corporate debt obligations, and municipal obligations during the three and nine months ended September 30, 2017 , respectively. Gains on sales of AFS securities are reported in other noninterest income in the Consolidated Statements of Operations. We had no sales of AFS securities during both the three and nine months ended September 30, 2018 , except those related to mortgage loans that had been securitized for sale in the normal course of business. We sold $227 million and $289 million of AFS securities during the three and nine months ended September 30, 2017 , respectively, which did not include those related to mortgage loans that had been securitized for sale in the normal course of business. These sales resulted in a realized gain of $2 million and $3 million during the three and nine months ended September 30, 2017 , respectively. Held-to-maturity securities Investment securities HTM are carried at amortized cost and adjusted for amortization of premiums and accretion of discounts using the interest method. Unrealized losses are not recorded to the extent they are temporary in nature. In conjunction with adoption of ASU 2017-12 (Targeted Improvements to Accounting for Hedging Activities) the Company elected to transfer $144 million of investment securities from HTM to AFS during the first quarter of 2018, as permitted by the standard, which resulted in a de minimis impact to OCI. There were no purchases or sales of HTM securities during both the three and nine months ended September 30, 2018 and September 30, 2017 . The following table summarizes, by duration, the unrealized loss positions on investment securities: Unrealized Loss Position with Duration 12 Months and Over Unrealized Loss Position with Duration Under 12 Months Fair Value Number of Securities Unrealized Loss Fair Value Number of Securities Unrealized Loss (Dollars in millions) September 30, 2018 Available-for-sale securities Agency - Commercial $ 819 54 $ (41 ) $ 274 23 $ (7 ) Agency - Residential 535 57 (34 ) 139 27 (5 ) Municipal obligations 25 11 (1 ) 6 10 — Corporate debt obligations — — — 13 4 — Other MBS — — — 14 1 — Held-to-maturity securities Agency - Commercial $ 330 25 $ (17 ) $ 10 1 $ — Agency - Residential 292 46 (15 ) 58 14 (2 ) December 31, 2017 Available-for-sale securities Agency - Commercial $ 218 20 $ (7 ) $ 744 41 $ (11 ) Agency - Residential 452 36 (14 ) 263 33 (3 ) Municipal obligations 6 3 — 22 9 — Corporate debt obligations — — — 3 1 — Held-to-maturity securities Agency - Commercial $ 348 25 $ (8 ) $ 99 8 $ (1 ) Agency - Residential 111 16 (3 ) 293 43 (3 ) 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 Cost Fair Value Weighted Average Yield Amortized Cost Fair Value Weighted Average Yield (Dollars in millions) September 30, 2018 Due after one year through five years $ 60 $ 58 2.51 % $ 10 $ 10 2.45 % Due after five years through 10 years 60 59 4.40 % 11 11 2.21 % Due after 10 years 1,825 1,740 2.43 % 703 669 2.46 % Total $ 1,945 $ 1,857 $ 724 $ 690 We pledge investment securities, primarily agency collateralized and municipal taxable mortgage obligations, to collateralize lines of credit and/or borrowings. At both September 30, 2018 and December 31, 2017 , we had pledged investment securities of $2.0 billion .

Loans Held-for-Sale

Loans Held-for-Sale	9 Months Ended
	Sep. 30, 2018
Receivables Held-for-sale [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. LHFS totaled $4.8 billion and $4.3 billion at September 30, 2018 and December 31, 2017 , respectively. For the three and nine months ended September 30, 2018 we had net gain on loan sales associated with LHFS of $43 million and $166 million , respectively, as compared to $75 million and $189 million for the three and nine months ended September 30, 2017 , respectively. At September 30, 2018 and December 31, 2017 , $20 million and $21 million , respectively, of LHFS were recorded at lower of cost or fair value. The remainder of the loans in the portfolio are recorded at fair value as we have elected the fair value option.

Loans Held-for-Investment

Loans Held-for-Investment	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Loans Held-for-Investment	Loans Held-for-Investment The following table presents our loans held-for-investment: September 30, 2018 December 31, 2017 (Dollars in millions) Consumer loans Residential first mortgage $ 3,085 $ 2,754 Home equity 704 664 Other 150 25 Total consumer loans 3,939 3,443 Commercial loans Commercial real estate 2,160 1,932 Commercial and industrial 1,317 1,196 Warehouse lending 1,550 1,142 Total commercial loans 5,027 4,270 Total loans held-for-investment $ 8,966 $ 7,713 The following table presents the UPB of our loan sales and purchases in the loans held-for-investment portfolio: Nine Months Ended September 30, 2018 2017 (Dollars in millions) Loans Sold (1) Performing loans $ 4 $ 78 Nonperforming loans — 25 Total performing and nonperforming loans sold $ 4 $ 103 Net gain associated with loan sales (2) $ — $ 1 Loans Purchased Residential first mortgage loans $ — $ 6 HELOC — 100 Total loans purchased $ — $ 106 Premium associated with loans purchased $ — $ 4 (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 Consolidated Statement of Operations. We have pledged certain LHFI, LHFS, and loans with government guarantees to collateralize lines of credit and/or borrowings with the FHLB of Indianapolis and the FRB of Chicago. At September 30, 2018 we had pledged loans of $7.7 billion , compared to $7.1 billion of pledged loans at December 31, 2017 . Allowance for Loan Losses We determine the estimate of the ALLL on at least a quarterly basis. Refer to Note 1 - Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies in Part II, Item 8 of Exhibit 99.1 to our June 1, 2018 Form 8-K Report for a description of the methodology. The ALLL, other than for loans that have been identified for individual evaluation for impairment, is determined on a loan pool basis by grouping loan types with common risk characteristics to determine our best estimate of incurred losses. The following table presents changes in ALLL, by class of loan: Residential First Mortgage (1) Home Equity Other Consumer Commercial Real Estate Commercial and Industrial Warehouse Lending Total (Dollars in millions) Three Months Ended September 30, 2018 Beginning balance ALLL $ 45 $ 19 $ 1 $ 45 $ 21 $ 6 $ 137 Charge-offs (2 ) — — — — — (2 ) Recoveries 1 — — — — — 1 Provision (benefit) (4 ) 1 1 1 (1 ) — (2 ) Ending balance ALLL $ 40 $ 20 $ 2 $ 46 $ 20 $ 6 $ 134 Three Months Ended September 30, 2017 Beginning balance ALLL $ 56 $ 19 $ 1 $ 37 $ 21 $ 6 $ 140 Charge-offs (1 ) (2 ) — — — — (3 ) Recoveries — 1 — — — — 1 Provision (benefit) (3 ) 2 — 5 (2 ) — 2 Ending balance ALLL $ 52 $ 20 $ 1 $ 42 $ 19 $ 6 $ 140 Nine Months Ended September 30, 2018 Beginning balance ALLL $ 47 $ 22 $ 1 $ 45 $ 19 $ 6 $ 140 Charge-offs (3 ) (2 ) (1 ) — — — (6 ) Recoveries 1 2 — — — — 3 Provision (benefit) (5 ) (2 ) 2 1 1 — (3 ) Ending balance ALLL $ 40 $ 20 $ 2 $ 46 $ 20 $ 6 $ 134 Nine Months Ended September 30, 2017 Beginning balance ALLL $ 65 $ 24 $ 1 $ 28 $ 17 $ 7 $ 142 Charge-offs (6 ) (3 ) (1 ) — — — (10 ) Recoveries 1 2 1 — — — 4 Provision (benefit) (8 ) (3 ) — 14 2 (1 ) 4 Ending balance ALLL $ 52 $ 20 $ 1 $ 42 $ 19 $ 6 $ 140 (1) Includes loans with government guarantees. The following table sets forth the method of evaluation, by class of loan: Residential First Mortgage (1) Home Equity Other Consumer Commercial Real Estate Commercial and Industrial Warehouse Lending Total (Dollars in millions) September 30, 2018 Loans held-for-investment (2) Individually evaluated $ 33 $ 24 $ — $ — $ — $ — $ 57 Collectively evaluated 3,044 677 150 2,160 1,317 1,550 8,898 Total loans $ 3,077 $ 701 $ 150 $ 2,160 $ 1,317 $ 1,550 $ 8,955 Allowance for loan losses (2) Individually evaluated $ 5 $ 8 $ — $ — $ — $ — $ 13 Collectively evaluated 35 12 2 46 20 6 121 Total allowance for loan losses $ 40 $ 20 $ 2 $ 46 $ 20 $ 6 $ 134 December 31, 2017 Loans held-for-investment (2) Individually evaluated $ 34 $ 27 $ — $ — $ — $ — $ 61 Collectively evaluated 2,712 633 25 1,932 1,196 1,142 7,640 Total loans $ 2,746 $ 660 $ 25 $ 1,932 $ 1,196 $ 1,142 $ 7,701 Allowance for loan losses (2) Individually evaluated $ 6 $ 10 $ — $ — $ — $ — $ 16 Collectively evaluated 41 12 1 45 19 6 124 Total allowance for loan losses $ 47 $ 22 $ 1 $ 45 $ 19 $ 6 $ 140 (1) Includes allowance related to loans with government guarantees. (2) Excludes loans carried under the fair value option. 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 nonperforming loans). When a loan is placed on nonaccrual status, the accrued interest income is reversed and the loan may only return to accrual status when principal and interest become current and are anticipated to be fully collectible. The following table sets forth the LHFI aging analysis of past due and current loans: 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due (1)(2) Total Past Due Current Total LHFI (Dollars in millions) September 30, 2018 Consumer loans Residential first mortgage $ 1 $ 1 $ 20 $ 22 $ 3,063 $ 3,085 Home equity 1 — 5 6 698 704 Other — — — — 150 150 Total consumer loans 2 1 25 28 3,911 3,939 Commercial loans Commercial real estate — — — — 2,160 2,160 Commercial and industrial — — — — 1,317 1,317 Warehouse lending — — — — 1,550 1,550 Total commercial loans — — — — 5,027 5,027 Total loans $ 2 $ 1 $ 25 $ 28 $ 8,938 $ 8,966 December 31, 2017 Consumer loans Residential first mortgage $ 2 $ 2 $ 23 $ 27 $ 2,727 $ 2,754 Home Equity 1 — 6 7 657 664 Other — — — — 25 25 Total consumer loans 3 2 29 34 3,409 3,443 Commercial loans Commercial real estate — — — — 1,932 1,932 Commercial and industrial — — — — 1,196 1,196 Warehouse lending — — — — 1,142 1,142 Total commercial loans — — — — 4,270 4,270 Total loans $ 3 $ 2 $ 29 $ 34 $ 7,679 $ 7,713 (1) Includes less than 90 day past due performing loans which are deemed nonaccrual. Interest is not being accrued on these loans. (2) Includes $4 million of loans accounted for under the fair value option at both September 30, 2018 and December 31, 2017 . Interest income is recognized on nonaccrual loans using a cash basis method. Interest that would have been accrued on impaired loans totaled less than $1 million and $1 million during the three and nine months ended September 30, 2018 and zero and $1 million during the three and nine months ended September 30, 2017 , respectively. At September 30, 2018 and December 31, 2017 , we had no loans 90 days 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. 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, which includes reductions of interest rate, extensions of amortization period, 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 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 nonperforming TDRs. The following table provides a summary of TDRs by type and performing status: TDRs Performing Nonperforming Total (Dollars in millions) September 30, 2018 Consumer loans Residential first mortgage $ 22 $ 9 $ 31 Home equity 21 4 25 Total TDRs (1)(2) $ 43 $ 13 $ 56 December 31, 2017 Consumer loans Residential first mortgage $ 19 $ 12 $ 31 Home Equity 24 4 28 Total TDRs (1)(2) $ 43 $ 16 $ 59 (1) The ALLL on TDR loans totaled $11 million and $13 million at September 30, 2018 and December 31, 2017 , respectively. (2) Includes $3 million of TDR loans accounted for under the fair value option at both September 30, 2018 and December 31, 2017 . The following table provides a summary of newly modified TDRs: New TDRs Number of Accounts Pre-Modification Unpaid Principal Balance Post-Modification Unpaid Principal Balance (1) Increase in Allowance at Modification (Dollars in millions) Three Months Ended September 30, 2018 Residential first mortgages 2 $ — $ — $ — Home equity (2)(3) 6 1 1 — Total TDR loans 8 $ 1 $ 1 $ — Three Months Ended September 30, 2017 Residential first mortgages 9 $ 3 $ 3 $ — Home equity (2)(3) 37 2 2 1 Total TDR loans 46 $ 5 $ 5 $ 1 Nine Months Ended September 30, 2018 Residential first mortgages 13 $ 2 $ 2 $ — Home equity (2)(3) 14 1 1 — Total TDR loans 27 $ 3 $ 3 $ — Nine Months Ended September 30, 2017 Residential first mortgages 17 $ 4 $ 4 $ — Home equity (2)(3) 71 5 5 2 Other consumer 1 — — — Total TDR loans 89 $ 9 $ 9 $ 2 (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 the fair value option. There were no residential first mortgage loans modified in the previous 12 months, that subsequently defaulted during the three and nine months ended September 30, 2018 , compared to one residential first mortgage loan with UPB of less than $1 million modified in the previous 12 months, that subsequently defaulted during both the three and nine months ended September 30, 2017. There was no change in the allowance associated with these TDRs at subsequent default. All TDR classes within the consumer and commercial portfolios are considered subsequently defaulted when greater than 90 days past due within 12 months of the restructuring date. Impaired Loans The following table presents individually evaluated impaired loans and the associated allowance: September 30, 2018 December 31, 2017 Recorded Investment Net Unpaid Principal Balance Related Allowance Recorded Investment Net Unpaid Principal Balance Related Allowance (Dollars in millions) With no related allowance recorded Consumer loans Residential first mortgage $ 13 $ 16 $ — $ 11 $ 12 $ — Home equity 1 4 — — — — Total loans with no related allowance recorded $ 14 $ 20 $ — $ 11 $ 12 $ — With an allowance recorded Consumer loans Residential first mortgage $ 20 $ 21 $ 5 $ 22 $ 22 $ 6 Home equity 23 24 8 24 27 10 Total loans with an allowance recorded $ 43 $ 45 $ 13 $ 46 $ 49 $ 16 Total Impaired loans Consumer Loans Residential first mortgage $ 33 $ 37 $ 5 $ 33 $ 34 $ 6 Home equity 24 28 8 24 27 10 Total impaired loans $ 57 $ 65 $ 13 $ 57 $ 61 $ 16 The following table presents average impaired loans and the interest income recognized: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in millions) Consumer loans Residential first mortgage $ 34 $ 1 $ 37 $ 1 $ 34 $ 1 $ 39 $ 1 Home equity 24 — 28 — 25 1 28 1 Commercial loans Commercial real estate — — 1 — — — — — Commercial and industrial — — — — 2 — — — Total impaired loans $ 58 $ 1 $ 66 $ 1 $ 61 $ 2 $ 67 $ 2 Credit Quality We utilize an internal risk rating system which is applied to all consumer and commercial loans. Descriptions of our internal 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. They 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. Nonperforming loans are classified as either substandard, doubtful or loss. 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 non-accrual. 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, but, rather that it is not practical or desirable to defer writing off the asset even though partial recovery may occur in the future. Consumer Loans Consumer loans consist of open and closed end loans extended to individuals for household, family, and other personal expenditures, and include consumer loans, and loans to individuals secured by 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 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 Substandard. Commercial Loans Management conducts periodic examinations which serve as an independent verification of the accuracy of the ratings assigned. 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 rating for the borrowing relationship. September 30, 2018 Pass Watch Special Mention Substandard Total Loans (Dollars in millions) Consumer Loans Residential first mortgage $ 3,037 $ 27 $ — $ 21 $ 3,085 Home equity 678 21 — 5 704 Other consumer 150 — — — 150 Total consumer loans $ 3,865 $ 48 $ — $ 26 $ 3,939 Commercial Loans Commercial real estate $ 2,135 $ 23 $ — $ 2 $ 2,160 Commercial and industrial 1,228 52 37 — 1,317 Warehouse 1,445 90 15 — 1,550 Total commercial loans $ 4,808 $ 165 $ 52 $ 2 $ 5,027 December 31, 2017 Pass Watch Special Mention Substandard Total Loans (Dollars in millions) Consumer Loans Residential first mortgage $ 2,706 $ 23 $ — $ 25 $ 2,754 Home equity 633 25 — 6 664 Other consumer 25 — — — 25 Total consumer loans $ 3,364 $ 48 $ — $ 31 $ 3,443 Commercial Loans Commercial real estate $ 1,902 $ 23 $ 7 $ — $ 1,932 Commercial and industrial 1,135 32 24 5 1,196 Warehouse 1,014 128 — — 1,142 Total commercial loans $ 4,051 $ 183 $ 31 $ 5 $ 4,270

Loans with Government Guarantee

Loans with Government Guarantees	9 Months Ended
	Sep. 30, 2018
Loans and Leases Receivable Disclosure [Abstract]
Loans with Government Guarantees	Loans with Government Guarantees Substantially all loans with government guarantees are insured or guaranteed by the FHA or the 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 ALLL on residential first mortgages. At September 30, 2018 and December 31, 2017 loans with government guarantees totaled $305 million and $271 million , respectively. At September 30, 2018 and December 31, 2017 repossessed assets and the associated claims recorded in other assets totaled $58 million and $84 million , respectively.

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2018
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 September 30, 2018 and December 31, 2017 . In connection with our securitization activities, we have retained a five percent interest in the investment securities ("other MBS") of one trust and are contracted as the sub-servicer of the underlying loans, compensated based on market rates, which constitutes a continuing involvement in the trust. Although we have a variable interest in the securitization trust, we are not its 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 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. See Note 2 - Investment Securities and Note 17 - Fair Value Measurements, for additional information. In addition, we have a continuing involvement, but are not the primary beneficiary for an unconsolidated VIE related to the FSTAR 2007-1 mortgage securitization trust. In accordance with the settlement agreement with MBIA, there is no further recourse to us related to FSTAR 2007-1, unless MBIA fails to meet their obligations. At September 30, 2018 and December 31, 2017 , the FSTAR 2007-1 mortgage securitization trust included 1,598 loans and 1,911 loans, respectively, with an aggregate principal balance of $53 million and $65 million , respectively.

Mortgage Servicing Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2018
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 increases in 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 8 - Derivative Financial Instruments. Changes in the fair value of residential first mortgage MSRs were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Balance at beginning of period $ 257 $ 184 $ 291 $ 335 Additions from loans sold with servicing retained 100 75 283 178 Reductions from sales (51 ) (4 ) (273 ) (260 ) Changes in fair value due to (1): Decrease in MSR value due to pay-offs, pay-downs and run-off (3 ) (5 ) (11 ) (15 ) Changes in estimates of fair value (2) 10 (4 ) 23 8 Fair value of MSRs at end of period $ 313 $ 246 $ 313 $ 246 (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. 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: September 30, 2018 December 31, 2017 Fair value impact due to Fair value impact due to Actual 10% adverse change 20% adverse change Actual 10% adverse change 20% adverse change (Dollars in millions) (Dollars in millions) Option adjusted spread 5.03 % $ 308 $ 304 6.29 % $ 286 $ 282 Constant prepayment rate 8.98 % 303 294 9.93 % 283 277 Weighted average cost to service per loan $ 80.79 310 307 $ 73.00 288 286 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 17 - 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 mortgage servicing rights: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Net return on mortgage servicing rights Servicing fees, ancillary income and late fees (1) $ 17 $ 14 $ 46 $ 43 Changes in fair value 7 (9 ) 12 (7 ) Gain (loss) on MSR derivatives (2) (11 ) — (27 ) (3 ) Net transaction costs — 1 (5 ) (7 ) Total return included in net return on mortgage servicing rights $ 13 $ 6 $ 26 $ 26 (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: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Loan administration income on mortgage loans subserviced Servicing fees, ancillary income and late fees (1) $ 14 $ 9 $ 36 $ 26 Other servicing charges (9 ) (4 ) (21 ) (10 ) Total income on mortgage loans subserviced, included in loan administration $ 5 $ 5 $ 15 $ 16 (1) Servicing fees are recorded on an accrual basis. Ancillary income and late fees are recorded on cash basis.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2018
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. The Company's policy is to present its 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, 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 fair value of derivatives not designated as hedging instruments are recognized in the Consolidated Statements of Income. Derivatives designated as hedging instruments: We have designated certain interest rate swaps as fair value hedges of fixed rate certificates of deposit. During the second quarter of 2018, we de-designated all of our remaining cash flow hedge relationships. The fair value of our derivatives designated as cash flow hedges are recorded in other comprehensive income (loss) on the Consolidated Statement of Financial Condition and reclassified into interest expense in the same period in which the hedged transaction is recognized in earnings. At September 30, 2018 , we had $23 million (net-of-tax) of accumulated unrealized gains on derivatives previously designated as cash flow hedges recorded in accumulated other comprehensive income, compared to $2 million (net-of-tax) of accumulated unrealized gains on derivatives designated as cash flow hedges recorded in accumulated other comprehensive income at December 31, 2017 . We evaluate the probability of hedged transactions occurring on at least a quarterly basis relating to amounts deferred in OCI. The estimated amount scheduled to be reclassified from other comprehensive income into earnings during the next 12 months represents $3 million of gains (net-of-tax). For further information, see Note 11 - Accumulated Other Comprehensive Income. Derivatives that are designated in hedging relationships are assessed for effectiveness using regression analysis at inception. All hedge relationships were highly effective as of September 30, 2018 . Cash flows and the income impact associated with designated hedges are reported in the same line item as the underlying hedged item. The following table presents the notional amount, estimated fair value and maturity of our derivative financial instruments: September 30, 2018 (1) Notional Amount Fair Value (2) Expiration Dates (Dollars in millions) Derivatives in fair value hedge relationships: Liabilities Interest rate swaps on CDs $ 30 $ — 2019 Derivatives not designated as hedging instruments: Assets Futures $ 2,494 $ — 2018-2023 Mortgage backed securities forwards 4,670 19 2018 Rate lock commitments 3,121 20 2018-2019 Interest rate swaps and swaptions 2,195 23 2018-2038 Total derivative assets $ 12,480 $ 62 Liabilities Futures $ 309 $ — 2018-2023 Mortgage backed securities forwards 1,903 6 2018 Rate lock commitments 419 1 2018 Interest rate swaps 765 13 2018-2048 Total derivative liabilities $ 3,396 $ 20 December 31, 2017 (1) Notional Amount Fair Value (2) Expiration Dates (Dollars in millions) Derivatives in cash flow hedge relationships: Liabilities Interest rate swaps on FHLB advances $ 830 $ 1 2023-2026 Derivatives not designated as hedging instruments: Assets Futures $ 1,597 $ — 2018-2022 Mortgage backed securities forwards 2,646 4 2018 Rate lock commitments 3,629 24 2018 Interest rate swaps and swaptions 1,441 11 2018-2048 Total derivative assets $ 9,313 $ 39 Liabilities Futures $ 209 $ — 2018-2021 Mortgage backed securities forwards 3,197 6 2018 Rate lock commitments 214 — 2018 Interest rate swaps 617 4 2018-2027 Total derivative liabilities $ 4,237 $ 10 (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 Statement of Financial Position Net Amount Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Gross Amount Financial Instruments Cash Collateral (Dollars in millions) September 30, 2018 Derivatives not designated as hedging instruments: Assets Mortgage backed securities forwards $ 19 $ — $ 19 $ — $ 18 Interest rate swaps and swaptions (1) 23 — 23 — 26 Total derivative assets $ 42 $ — $ 42 $ — $ 44 Liabilities Futures $ — $ — $ — $ — $ 2 Mortgage backed securities forwards 6 — 6 — 2 Interest rate swaps (1) 13 — 13 — 20 Total derivative liabilities $ 19 $ — $ 19 $ — $ 24 December 31, 2017 Derivatives designated as hedging instruments: Liabilities Interest rate swaps on FHLB advances (1) $ 1 $ — $ 1 $ — $ 17 Derivatives not designated as hedging instruments: Assets Mortgage-backed securities forwards $ 4 $ — $ 4 $ — $ 8 Interest rate swaps and swaptions (1) 11 — 11 — 10 Total derivative assets $ 15 $ — $ 15 $ — $ 18 Liabilities Futures $ — $ — $ — $ — $ 2 Mortgage-backed securities forwards 6 — 6 — 2 Interest rate swaps (1) 4 — 4 — 5 Total derivative liabilities $ 10 $ — $ 10 $ — $ 9 (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. The fair value basis adjustment on our hedged CDs is included in interest bearing deposits on our Consolidated Statements of Operations. The carrying amount of our hedged CDs was $30 million at September 30, 2018 and zero at December 31, 2017 and the cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged CDs was de minimis and zero at September 30, 2018 and December 31, 2017 , respectively. At September 30, 2018 , we pledged a total of $24 million related to derivative financial instruments, consisting of $4 million of cash collateral on derivative liabilities and $20 million of maintenance margin on centrally cleared derivatives and had an obligation to return cash of $44 million on derivative assets. We pledged a total of $26 million related to derivative financial instruments, consisting of $7 million of cash collateral on derivatives and $19 million of maintenance margin on centrally cleared derivatives and had an obligation to return cash of $18 million on derivative assets at December 31, 2017 . 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 in other assets. The following table presents the net gain (loss) recognized on designated instruments, net of the impact of offsetting positions: Amount Recorded in Net Interest Income (1) Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Gain on cash flow hedging relationships in interest contracts Amount of gain reclassified from AOCI into income $ 1 $ — $ — $ 5 Total gain on hedges $ 1 $ — $ — $ 5 (1) We had no gain/(loss) on fair value hedging relationships in interest contracts for the three and nine months ending September 30, 2018 and September 30, 2017 . The following table presents net gain (loss) recognized in income on derivative instruments, net of the impact of offsetting positions: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Derivatives not designated as hedging instruments: Location of Gain (Loss) Futures Net return on mortgage servicing rights $ (1 ) $ (1 ) $ (4 ) $ (1 ) Interest rate swaps and swaptions Net return on mortgage servicing rights (8 ) (2 ) (16 ) (7 ) Mortgage-backed securities forwards Net return on mortgage servicing rights (2 ) 2 (6 ) 5 Rate lock commitments and forward agency and loan sales Net gain on loan sales 21 (8 ) 12 (16 ) Interest rate swaps (1) Other noninterest income 1 — 2 1 Total derivative gain (loss) $ 11 $ (9 ) $ (12 ) $ (18 ) (1) Includes customer-initiated commercial interest rate swaps.

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Borrowings	Borrowings Federal Home Loan Bank Advances The following is a breakdown of our FHLB advances outstanding: September 30, 2018 December 31, 2017 Amount Rate Amount Rate (Dollars in millions) Short-term fixed rate term advances $ 3,194 2.18 % $ 4,260 1.40 % Short-term variable adjustable rate (1) 5 2.54 % — — % Total Short-term Federal Home Loan Bank advances 3,199 4,260 Long-term LIBOR adjustable advances 1,130 2.55 % 1,130 1.76 % Long-term fixed rate advances (2) 150 1.53 % 275 1.41 % Total Long-term Federal Home Loan Bank advances 1,280 1,405 Total Federal Home Loan Bank advances $ 4,479 $ 5,665 (1) Includes short-term variable adjustable rate federal funds line of credit. (2) Includes the current portion of fixed rate advances of $50 million and $125 million at September 30, 2018 and December 31, 2017 , respectively. We are required to maintain a minimum amount of qualifying collateral securing FHLB advances. In the event of default, the FHLB advance is similar to a secured borrowing, whereby the FHLB has the right to sell the pledged collateral to settle the fair value of the outstanding advances. At September 30, 2018 , our Board of Directors authorized and approved a line of credit with the FHLB of up to $10.0 billion , which is further limited based on our total assets and qualified collateral, as determined by the FHLB. At September 30, 2018 , we had $4.5 billion of advances outstanding and an additional $2.1 billion of collateralized borrowing capacity available at the FHLB. At September 30, 2018 , $1.1 billion of the outstanding advances were long-term adjustable rate, with interest rates that reset every three months and are based on the three -month LIBOR index. The advances may be prepaid without penalty, with notification at scheduled three month intervals. The following table contains detailed information on our FHLB advances and other borrowings: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Maximum outstanding at any month end $ 5,085 $ 5,365 $ 5,740 $ 5,365 Average outstanding balance 4,745 5,043 4,996 4,239 Average remaining borrowing capacity 2,165 1,182 1,830 1,297 Weighted average interest rate 2.08 % 1.36 % 1.88 % 1.26 % The following table outlines the maturity dates of our FHLB advances and other borrowings: September 30, 2018 (Dollars in millions) 2018 $ 3,199 2019 50 2020 — 2021 — Thereafter 1,230 Total $ 4,479 Parent Company Senior Notes and Trust Preferred Securities The following table presents long-term debt, net of debt issuance costs: September 30, 2018 December 31, 2017 Amount Interest Rate Amount Interest Rate (Dollars in millions) Senior Notes Senior notes, matures 2021 $ 248 6.125 % $ 247 6.125 % Trust Preferred Securities Floating Three Month LIBOR Plus: 3.25%, matures 2032 $ 26 5.62 % $ 26 4.92 % 3.25%, matures 2033 26 5.59 % 26 4.61 % 3.25%, matures 2033 26 5.59 % 26 4.94 % 2.00%, matures 2035 26 4.34 % 26 3.36 % 2.00%, matures 2035 26 4.34 % 26 3.36 % 1.75%, matures 2035 51 4.08 % 51 3.34 % 1.50%, matures 2035 25 3.84 % 25 2.86 % 1.45%, matures 2037 25 3.78 % 25 3.04 % 2.50%, matures 2037 16 4.83 % 16 4.09 % Total Trust Preferred Securities 247 247 Total other long-term debt $ 495 $ 494 Senior Notes On July 11, 2016, we issued $250 million of senior notes (“Senior Notes”) which mature on July 15, 2021. The notes are unsecured and rank equally and ratably with the unsecured senior indebtedness of Flagstar Bancorp, Inc. 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 , plus, in each case accrued and unpaid interest. Trust Preferred Securities We sponsor nine trust subsidiaries, which issued preferred stock to third party investors. We issued trust preferred securities to those trusts, which we include in long-term debt. The trust preferred 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 September 30, 2018 , we had no deferred interest.

Warrants

Warrants	9 Months Ended
	Sep. 30, 2018
Warrants and Rights Note Disclosure [Abstract]
Warrants and Stock-Based Compensation	Warrants May Investor Warrant We granted warrants (the "May Investor Warrants") on January 30, 2009 under anti-dilution provisions applicable to certain investors (the "May Investors") in our May 2008 private placement capital raise. During the nine months ended September 30, 2017 , a total of 237,627 May Investor Warrants were exercised, resulting in the issuance of 154,313 shares of Common Stock. As of September 30, 2018 , there were no remaining May Investor Warrants outstanding and the related liability was reduced to zero . TARP Warrant On January 30, 2009, in conjunction with the sale of 266,657 shares of TARP Preferred, we issued a warrant to purchase up to approximately 645,138 shares of Common Stock at an exercise price of $62.00 per share (the "Warrant"). The Warrant is exercisable through January 30, 2019 and remains outstanding. Stock-Based Compensation We had stock-based compensation expense of $4 million and $8 million for the three and nine months ended September 30, 2018 , respectively. For the three and nine months ended September 30, 2017 stock-based compensation expense was $2 million and $8 million , respectively. Restricted Stock and Restricted Stock Units The following table summarizes restricted stock and restricted stock units activity: Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Shares Weighted — Average Grant-Date Fair Value per Share Shares Weighted — Average Grant-Date Fair Value per Share Restricted Stock and Restricted Stock Units Non-vested balance at beginning of period 1,796,628 $ 27.33 1,290,450 $ 20.52 Granted — — 863,342 34.36 Vested (4,901 ) 26.73 (239,688 ) 19.68 Canceled and forfeited (8,312 ) 31.23 (130,689 ) 20.72 Non-vested balance at end of period 1,783,415 $ 27.32 1,783,415 $ 27.32 2017 Employee Stock Purchase Plan The Employee Stock Purchase Plan ("2017 ESPP") was approved on March 20, 2017 by our Board of Directors ("the 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 23,623 and 88,566 shares issued under the 2017 ESPP during the three and nine months ended September 30, 2018 , respectively, and the associated compensation expense was de minimis for both periods.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following table sets forth the components in accumulated other comprehensive income (loss): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Investment securities Beginning balance $ (56 ) $ (6 ) $ (18 ) $ (8 ) Unrealized gain (loss) (11 ) — (55 ) 2 Less: Tax provision (benefit) (2 ) — (13 ) 1 Net unrealized gain (loss) (9 ) — (42 ) 1 Reclassifications out of AOCI (1) — 1 — 3 Less: Tax provision — — — 1 Net unrealized gain reclassified out of AOCI — 1 — 2 Reclassification of certain income tax effects (2) — — (5 ) — Other comprehensive income (loss), net of tax (9 ) 1 (47 ) 3 Ending balance $ (65 ) $ (5 ) $ (65 ) $ (5 ) Cash Flow Hedges Beginning balance $ 24 $ (3 ) $ 2 $ 1 Unrealized gain (loss) — — 28 (2 ) Less: Tax provision (benefit) — — 7 (1 ) Net unrealized gain (loss) — — 21 (1 ) Reclassifications out of AOCI (1) (1 ) — — (5 ) Less: Tax provision (benefit) — — — (2 ) Net unrealized gain (loss) reclassified out of AOCI (1 ) — — (3 ) Other comprehensive income (loss), net of tax (1 ) — 21 (4 ) Ending balance $ 23 $ (3 ) $ 23 $ (3 ) (1) Reclassifications are reported in interest expense 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	9 Months Ended
	Sep. 30, 2018
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: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions, except share data) Net income $ 48 $ 40 $ 133 $ 108 Weighted Average Shares Weighted average common shares outstanding 57,600,360 57,162,025 57,483,802 57,062,696 Effect of dilutive securities May Investor Warrants — — — 16,383 Stock-based awards 732,238 1,024,568 818,118 1,054,217 Weighted average diluted common shares 58,332,598 58,186,593 58,301,920 58,133,296 Earnings per common share Basic earnings per common share $ 0.84 $ 0.71 $ 2.32 $ 1.90 Effect of dilutive securities May Investor Warrants — — — — Stock-based awards (0.01 ) (0.01 ) (0.04 ) (0.04 ) Diluted earnings per common share $ 0.83 $ 0.70 $ 2.28 $ 1.86

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Warrants and Stock-Based Compensation	Warrants May Investor Warrant We granted warrants (the "May Investor Warrants") on January 30, 2009 under anti-dilution provisions applicable to certain investors (the "May Investors") in our May 2008 private placement capital raise. During the nine months ended September 30, 2017 , a total of 237,627 May Investor Warrants were exercised, resulting in the issuance of 154,313 shares of Common Stock. As of September 30, 2018 , there were no remaining May Investor Warrants outstanding and the related liability was reduced to zero . TARP Warrant On January 30, 2009, in conjunction with the sale of 266,657 shares of TARP Preferred, we issued a warrant to purchase up to approximately 645,138 shares of Common Stock at an exercise price of $62.00 per share (the "Warrant"). The Warrant is exercisable through January 30, 2019 and remains outstanding. Stock-Based Compensation We had stock-based compensation expense of $4 million and $8 million for the three and nine months ended September 30, 2018 , respectively. For the three and nine months ended September 30, 2017 stock-based compensation expense was $2 million and $8 million , respectively. Restricted Stock and Restricted Stock Units The following table summarizes restricted stock and restricted stock units activity: Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Shares Weighted — Average Grant-Date Fair Value per Share Shares Weighted — Average Grant-Date Fair Value per Share Restricted Stock and Restricted Stock Units Non-vested balance at beginning of period 1,796,628 $ 27.33 1,290,450 $ 20.52 Granted — — 863,342 34.36 Vested (4,901 ) 26.73 (239,688 ) 19.68 Canceled and forfeited (8,312 ) 31.23 (130,689 ) 20.72 Non-vested balance at end of period 1,783,415 $ 27.32 1,783,415 $ 27.32 2017 Employee Stock Purchase Plan The Employee Stock Purchase Plan ("2017 ESPP") was approved on March 20, 2017 by our Board of Directors ("the 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 23,623 and 88,566 shares issued under the 2017 ESPP during the three and nine months ended September 30, 2018 , respectively, and the associated compensation expense was de minimis for both periods.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes in interim periods requires us to make a best estimate of the effective tax rate expected to be applicable for the full year, adjusted for any discreet items for the applicable period. This estimated effective tax rate is then applied to interim consolidated pre-tax operating income to determine the interim provision for income taxes. The 2018 effective tax rate includes our assessment of the impact of the Tax Cuts and Jobs Act. The following table presents our provision for income tax and effective tax provision rate: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Provision for income taxes $ 12 $ 20 $ 33 $ 52 Effective tax provision rate 20.0 % 32.4 % 20.1 % 32.3 % We believe that it is unlikely that our unrecognized tax benefits will change by a material amount during the next 12 months . We recognize interest and penalties related to unrecognized tax benefits in provision for income taxes.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2018
Regulatory Capital Requirements [Abstract]
Regulatory Matters	Regulatory Matters Regulatory Capital We, along with the Bank, 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. On January 1, 2015 , the Basel III rules became effective and included transition provisions through 2018. In preparation for the expected capital simplification rules, the Basel III implementation phase-in has been halted, as the agencies issued a final rule that will maintain the capital rules’ 2017 transition provisions for several regulatory capital deductions and certain other requirements that are subject to multi-year phase-in schedules in the regulatory capital rules. 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 September 30, 2018 and December 31, 2017 . The following tables present the regulatory capital ratios as of the dates indicated: Flagstar Bancorp Actual For Capital Adequacy Purposes Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in millions) September 30, 2018 Tangible capital (to adjusted avg. total assets) $ 1,540 8.36 % N/A N/A N/A N/A Tier 1 leverage (to adjusted avg. total assets) 1,540 8.36 % $ 737 4.00 % $ 921 5.00 % Common equity Tier 1 capital (to RWA) 1,300 11.01 % 532 4.50 % 768 6.50 % Tier 1 capital (to RWA) 1,540 13.04 % 709 6.00 % 945 8.00 % Total capital (to RWA) 1,677 14.20 % 945 8.00 % 1,181 10.00 % December 31, 2017 Tangible capital (to adjusted avg. total assets) $ 1,442 8.51 % N/A N/A N/A N/A Tier 1 leverage (to adjusted avg. total assets) 1,442 8.51 % $ 678 4.0 % $ 848 5.0 % Common equity Tier 1 capital (to RWA) 1,216 11.50 % 476 4.5 % 688 6.5 % Tier 1 capital (to RWA) 1,442 13.63 % 635 6.0 % 846 8.0 % Total capital (to RWA) 1,576 14.90 % 846 8.0 % 1,058 10.0 % N/A - Not applicable Flagstar Bank Actual For Capital Adequacy Purposes Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in millions) September 30, 2018 Tangible capital (to adjusted avg. total assets) $ 1,617 8.77 % N/A N/A N/A N/A Tier 1 leverage (to adjusted avg. total assets) 1,617 8.77 % $ 737 4.00 % $ 922 5.00 % Common equity tier 1 capital (to RWA) 1,617 13.68 % 532 4.50 % 768 6.50 % Tier 1 capital (to RWA) 1,617 13.68 % 709 6.00 % 945 8.00 % Total capital (to RWA) 1,753 14.84 % 945 8.00 % 1,182 10.00 % December 31, 2017 Tangible capital (to adjusted avg. total assets) $ 1,531 9.04 % N/A N/A N/A N/A Tier 1 leverage (to adjusted avg. total assets) 1,531 9.04 % $ 677 4.0 % $ 847 5.0 % Common equity tier 1 capital (to RWA) 1,531 14.46 % 476 4.5 % 688 6.5 % Tier 1 capital (to RWA) 1,531 14.46 % 635 6.0 % 847 8.0 % Total capital (to RWA) 1,664 15.72 % 847 8.0 % 1,059 10.0 % N/A - Not applicable

Legal Proceedings, Contingencie

Legal Proceedings, Contingencies and Commitments	9 Months Ended
	Sep. 30, 2018
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 origination, purchase, sale, and servicing of mortgage loans. From time to time, governmental agencies also conduct investigations or examinations of various practices of the Bank. 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. At September 30, 2018 , 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 material adverse effect on our financial condition, results of operations or cash flows. DOJ litigation settlement In 2012, the Bank entered into a Settlement Agreement with the DOJ which meets the definition of a financial liability (the "DOJ Liability"). In accordance with the Settlement Agreement, we made an initial payment of $15 million and agreed to make future annual payments totaling $118 million in annual increments of up to $25 million upon meeting all 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 the third quarter of 2016; and (c) the Bank’s Tier 1 Leverage Capital Ratio equals 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 the purpose of which 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 and is impacted by forecasted estimates of the timing of potential payments, which are impacted by estimates of equity, earnings, timing and amount of dividends and growth of the balance sheet and their related impacts on forecasted Tier 1 Leverage Capital Ratio. For further information on the fair value of the liability, see Note 17 - Fair Value Measurements. Other litigation accruals At both September 30, 2018 and December 31, 2017 , excluding the fair value liability relating to the DOJ litigation settlement, our total accrual for contingent liabilities and settled litigation was $1 million . Commitments The following table is a summary of the contractual amount of significant commitments: September 30, 2018 December 31, 2017 (Dollars in millions) Commitments to extend credit Mortgage loans interest-rate lock commitments $ 3,567 $ 3,667 Warehouse loan commitments 2,422 1,618 Commercial and industrial commitments 728 695 Other commercial commitments 1,063 1,021 HELOC commitments 395 283 Other consumer commitments 123 15 Standby and commercial letters of credit 66 50 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. Since 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 interest-rate lock commitments. We enter into mortgage interest-rate lock commitments with our customers. These commitments are considered to be derivative instruments and the fair value of these commitments is recorded in the Consolidated Statements of Financial Condition in other assets. For further information, see Note 8 - 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. See Note 1 - Basis for Presentation, for further information on our mortgage loan warehouse business acquisition. Commercial and industrial and other commercial commitments. Conditional commitments issued under various terms to lend funds to business 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. Since 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. C onditional commitments issued to accommodate the financial needs of customers. The commitments are 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. 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 probable credit losses inherent 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 $3 million at both September 30, 2018 and December 31, 2017 , is reflected in other liabilities on the Consolidated Statements of Financial Condition.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
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. For further information see the Fair Value Measurements section of Item 7 of Exhibit 99.1 to our June 1, 2018 Form 8-K Report. 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 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 Statement of Financial Condition and by level in the valuation hierarchy. September 30, 2018 Level 1 Level 2 Level 3 Total Fair Value (Dollars in millions) Investment securities available-for-sale Agency - Commercial $ — $ 1,094 $ — $ 1,094 Agency - Residential — 674 — 674 Municipal obligations — 32 — 32 Corporate debt obligations — 41 — 41 Other MBS — 16 — 16 Loans held-for-sale Residential first mortgage loans — 4,815 — 4,815 Loans held-for-investment Residential first mortgage loans — 8 — 8 Home equity — — 3 3 Mortgage servicing rights — — 313 313 Derivative assets Rate lock commitments (fallout-adjusted) — — 20 20 Mortgage-backed securities forwards — 19 — 19 Interest rate swaps and swaptions — 23 — 23 Total assets at fair value $ — $ 6,722 $ 336 $ 7,058 Derivative liabilities Rate lock commitments (fallout-adjusted) $ — $ — $ (1 ) $ (1 ) Mortgage backed securities forwards — (6 ) — (6 ) Interest rate swaps — (13 ) — (13 ) DOJ litigation settlement — — (60 ) (60 ) Contingent consideration — — (11 ) (11 ) Total liabilities at fair value $ — $ (19 ) $ (72 ) $ (91 ) December 31, 2017 Level 1 Level 2 Level 3 Total Fair Value (Dollars in millions) Investment securities available-for-sale Agency - Commercial $ — $ 987 $ — $ 987 Agency - Residential — 794 — 794 Municipal obligations — 34 — 34 Corporate debt obligations — 38 — 38 Loans held-for-sale Residential first mortgage loans — 4,300 — 4,300 Loans held-for-investment Residential first mortgage loans — 8 — 8 Home equity — — 4 4 Mortgage servicing rights — — 291 291 Derivative assets Rate lock commitments (fallout-adjusted) — — 24 24 Mortgage-backed securities forwards — 4 — 4 Interest rate swaps and swaptions — 11 — 11 Total assets at fair value $ — $ 6,176 $ 319 $ 6,495 Derivative liabilities Interest rate swap on FHLB advances $ — $ (1 ) $ — $ (1 ) Mortgage-backed securities forwards — (6 ) — (6 ) Interest rate swaps — (4 ) — (4 ) DOJ litigation settlement — — (60 ) (60 ) Contingent consideration — — (25 ) (25 ) Total liabilities at fair value $ — $ (11 ) $ (85 ) $ (96 ) There were no transfers between Level 1 and Level 2 during the nine months ended September 30, 2018 . 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 Beginning of Period Total Gains (Losses) Recorded in Earnings (1) Purchases / Originations Sales Settlements Transfers In (Out) Balance at End of Period (Dollars in millions) Three Months Ended September 30, 2018 Assets Loans held-for-investment Home equity $ 3 $ — $ — $ — $ — $ — $ 3 Mortgage servicing rights (2) 257 7 100 (51 ) — — 313 Rate lock commitments (net) (2)(3) 32 (5 ) 60 — — (68 ) 19 Totals $ 292 $ 2 $ 160 $ (51 ) $ — $ (68 ) $ 335 Liabilities DOJ litigation settlement $ (60 ) $ — $ — $ — $ — $ — $ (60 ) Contingent consideration (18 ) 3 — — 4 — (11 ) Totals $ (78 ) $ 3 $ — $ — $ 4 $ — $ (71 ) Three Months Ended September 30, 2017 Assets Loans held-for-investment Home equity $ 5 $ — $ — $ — $ (1 ) $ — $ 4 Mortgage servicing rights (2) 184 (9 ) 75 (4 ) — — 246 Rate lock commitments (net) (2)(3) 26 21 82 — — (97 ) 32 Totals $ 215 $ 12 $ 157 $ (4 ) $ (1 ) $ (97 ) $ 282 Liabilities DOJ litigation settlement $ (60 ) $ — $ — $ — $ — $ — $ (60 ) Contingent consideration (23 ) (1 ) (2 ) — — — (26 ) Totals $ (83 ) $ (1 ) $ (2 ) $ — $ — $ — $ (86 ) (1) There were no unrealized gains (losses) recorded in OCI during the three months ended September 30, 2018 and 2017 . (2) 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. (3) 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. Balance at Total Gains (Losses) Recorded in Earnings (1) Purchases / Originations Sales Settlements Transfers In (Out) Balance at (Dollars in millions) Nine Months Ended September 30, 2018 Assets Loans held-for-investment Home equity $ 4 $ — $ — $ — $ (1 ) $ — $ 3 Mortgage servicing rights (2) 291 12 283 (273 ) — — 313 Rate lock commitments (net) (2)(3) 24 (37 ) 191 — — (159 ) 19 Totals $ 319 $ (25 ) $ 474 $ (273 ) $ (1 ) $ (159 ) $ 335 Liabilities DOJ litigation settlement $ (60 ) $ — $ — $ — $ — $ — $ (60 ) Contingent consideration (25 ) 8 — — 6 — (11 ) Totals $ (85 ) $ 8 $ — $ — $ 6 $ — $ (71 ) Nine Months Ended September 30, 2017 Assets Loans held-for-sale Home equity $ — $ 1 $ — $ (52 ) $ (1 ) $ 52 $ — Loans held-for-investment Home equity 65 1 — — (7 ) (55 ) 4 Mortgage servicing rights (2) 335 (7 ) 178 (260 ) — — 246 Rate lock commitments (net) (2)(3) 18 55 199 — — (240 ) 32 Totals $ 418 $ 50 $ 377 $ (312 ) $ (8 ) $ (243 ) $ 282 Liabilities DOJ litigation settlement $ (60 ) $ — $ — $ — $ — $ — $ (60 ) Contingent consideration — (1 ) (25 ) — — — (26 ) Totals $ (60 ) $ (1 ) $ (25 ) $ — $ — $ — $ (86 ) (1) There were no unrealized gains (losses) recorded in OCI during the nine months ended September 30, 2018 and 2017 . (2) 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. (3) 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) September 30, 2018 Assets Loans held-for-investment Home equity $ 3 Discounted cash flows Discount rate 7.2% - 10.8% (9.0%) Mortgage servicing rights $ 313 Discounted cash flows Option adjusted spread 2.1% -25.3% (5.0%) Rate lock commitments (net) $ 19 Consensus pricing Origination pull-through rate 79.8% - 87.2% (81.3%) Liabilities DOJ litigation settlement $ (60 ) Discounted cash flows Discount rate 7.2% - 10.8% (9.0%) Contingent consideration $ (11 ) Discounted cash flows Beta 0.6 - 1.6 (1.1) Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars in millions) December 31, 2017 Assets Loans held-for-investment Home equity $ 4 Discounted cash flows Discount rate 7.2% - 10.8% (9.0%) Mortgage servicing rights $ 291 Discounted cash flows Option adjusted spread 5.0% - 7.5% (6.3%) Rate lock commitments (net) $ 24 Consensus pricing Origination pull-through rate 64.7% - 97.1% (82.0%) Liabilities DOJ litigation settlement $ (60 ) Discounted cash flows Discount rate 7.8% - 11.7% (9.7%) Contingent consideration $ (25 ) Discounted cash flows Beta 0.6 - 1.6 (1.1) Recurring Significant Unobservable Inputs Home equity. The 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 would result in a significantly lower (higher) fair value measurement. Increases (decreases) in prepayment 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 would 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 September 30, 2018 and December 31, 2017 the weighted average life (in years) for the entire MSR portfolio was 6.1 and 6.0 , respectively. DOJ litigation settlement. The significant unobservable input used in the fair value measurement of the DOJ litigation settlement are the discount rate and asset growth rate, in addition to those assumptions discussed in Note 16 - Legal Proceedings, Contingencies and Commitments. Significant increases (decreases) in the discount rate or asset growth rate in isolation may result in a marginally lower (higher) fair value measurement. For further information on the fair value inputs related to the DOJ litigation settlement, see Note 16 - Legal Proceedings, Contingencies, and Commitments. 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 would result in a significantly higher (lower) fair value measurement. Contingent consideration. The significant unobservable input used in the fair value of the contingent consideration is future forecasted target production volumes and profitability of the division. An increase or decrease to these inputs results in an increase or decrease of the liability. Other unobservable inputs include Beta and volatility which drive the risk adjusted discount rate utilized in a Monte Carlo simulation. Increases (decreases) in these inputs results in a lower (higher) to the liability. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis We also have assets that under certain conditions are subject to measurement 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) September 30, 2018 Loans held-for-sale (2) $ 6 $ 6 $ — $ (1 ) Impaired loans held-for-investment (2) Residential first mortgage loans 12 — 12 (5 ) Repossessed assets (3) 7 — 7 (3 ) Totals $ 25 $ 6 $ 19 $ (9 ) December 31, 2017 Loans held-for-sale (2) $ 6 $ 6 $ — $ (1 ) Impaired loans held-for-investment (2) Residential first mortgage loans 21 — 21 (10 ) Repossessed assets (3) 8 — 8 (4 ) Totals $ 35 $ 6 $ 29 $ (15 ) (1) The fair values are determined at various dates during the three months ended September 30, 2018 and the year ended December 31, 2017 , respectively. (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 tables present 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) September 30, 2018 Impaired loans held-for-investment Loans held-for-investment $ 12 Fair value of collateral Loss severity discount 25% - 30% (28.3%) Repossessed assets $ 7 Fair value of collateral Loss severity discount 0% - 100% (26.4%) December 31, 2017 Impaired loans held-for-investment Loans held-for-investment $ 21 Fair value of collateral Loss severity discount 25% - 30% (27.9%) Repossessed assets $ 8 Fair value of collateral Loss severity discount 0% - 100% (70.9%) 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: September 30, 2018 Estimated Fair Value Carrying Value Total Level 1 Level 2 Level 3 (Dollars in millions) Assets Cash and cash equivalents $ 264 $ 264 $ 264 $ — $ — Investment securities available-for-sale 1,857 1,857 — 1,857 — Investment securities held-to-maturity 724 690 — 690 — Loans held-for-sale 4,835 4,836 — 4,836 — Loans held-for-investment 8,966 8,839 — 8 8,831 Loans with government guarantees 305 274 — 274 — Mortgage servicing rights 313 313 — — 313 Federal Home Loan Bank stock 303 303 — 303 — Bank owned life insurance 338 338 — 338 — Repossessed assets 7 7 — — 7 Other assets, foreclosure claims 58 58 — 58 — Derivative financial instruments, assets 62 62 — 42 20 Liabilities Retail deposits Demand deposits and savings accounts $ (5,469 ) $ (4,891 ) $ — $ (4,891 ) $ — Certificates of deposit (2,208 ) (2,199 ) — (2,199 ) — Wholesale deposits (653 ) (651 ) — (651 ) — Government deposits (1,466 ) (1,421 ) — (1,421 ) — Custodial deposits (1,793 ) (1,709 ) — (1,709 ) — Federal Home Loan Bank advances (4,479 ) (4,463 ) — (4,463 ) — Long-term debt (495 ) (459 ) — (459 ) — DOJ litigation settlement (60 ) (60 ) — — (60 ) Contingent consideration (11 ) (11 ) — — (11 ) Derivative financial instruments, liabilities (20 ) (20 ) — (19 ) (1 ) December 31, 2017 Estimated Fair Value Carrying Value Total Level 1 Level 2 Level 3 (Dollars in millions) Assets Cash and cash equivalents $ 204 $ 204 $ 204 $ — $ — Investment securities available-for-sale 1,853 1,853 — 1,853 — Investment securities held-to-maturity 939 924 — 924 — Loans held-for-sale 4,321 4,322 — 4,322 — Loans held-for-investment 7,713 7,667 — 8 7,659 Loans with government guarantees 271 261 — 261 — Mortgage servicing rights 291 291 — — 291 Federal Home Loan Bank stock 303 303 — 303 — Bank owned life insurance 330 330 — 330 — Repossessed assets 8 8 — — 8 Other assets, foreclosure claims 84 84 — 84 — Derivative financial instruments, assets 39 39 — 15 24 Liabilities Retail deposits Demand deposits and savings accounts $ (5,003 ) $ (4,557 ) $ — $ (4,557 ) $ — Certificates of deposit (1,494 ) (1,498 ) — (1,498 ) — Wholesale deposits (43 ) (43 ) — (43 ) — Government deposits (1,073 ) (1,048 ) — (1,048 ) — Custodial deposits (1,321 ) (1,311 ) — (1,311 ) — Federal Home Loan Bank advances (5,665 ) (5,662 ) — (5,662 ) — Long-term debt (494 ) (417 ) — (417 ) — DOJ litigation settlement (60 ) (60 ) — — (60 ) Contingent consideration (25 ) (25 ) — — (25 ) Derivative financial instruments, liabilities (11 ) (11 ) — (11 ) — 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: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Assets Loans held-for-sale Net gain on loan sales $ 7 $ 92 $ (61 ) $ 260 Loans held-for-investment Other noninterest income $ — $ — $ — $ 1 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: September 30, 2018 December 31, 2017 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 $ 7 $ 7 $ — $ 6 $ 5 $ (1 ) Loans held-for-investment 5 4 (1 ) 5 4 (1 ) Total nonaccrual loans $ 12 $ 11 $ (1 ) $ 11 $ 9 $ (2 ) Other performing loans Loans held-for-sale $ 4,692 $ 4,808 $ 116 $ 4,167 $ 4,295 $ 128 Loans held-for-investment 8 7 (1 ) 10 8 (2 ) Total other performing loans $ 4,700 $ 4,815 $ 115 $ 4,177 $ 4,303 $ 126 Total loans Loans held-for-sale $ 4,699 $ 4,815 $ 116 $ 4,173 $ 4,300 $ 127 Loans held-for-investment 13 11 (2 ) 15 12 (3 ) Total loans $ 4,712 $ 4,826 $ 114 $ 4,188 $ 4,312 $ 124 Liabilities Litigation settlement (1) $ (118 ) $ (60 ) $ 58 $ (118 ) $ (60 ) $ 58 (1) We are obligated to pay $118 million in installment payments upon meeting certain performance conditions, as described in Note 16 - Legal Proceedings, Contingencies and Commitments.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2018
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 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. Effective Jan uary 1, 2018, the following changes were made with offsetting adjustments included in the Other segment to reconcile to the Consolidated Statements of Operations: 1) operating leases in Community Banking are reflected as loans by reclassifying rental income and depreciation expense to net interest income, and 2) the interest expense on custodial deposits on third party sub-servicing contracts, recognized in the Mortgage Servicing segment as loan administration income, is now reflected as a component of net interest income. Prior period segment financial information, related to these changes, 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, Warehouse Lending and LHFI Portfolio groups. 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 wealth management products and services. 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 resulting gains from sales associated with these loans are recognized in the Mortgage Originations segment whereas the interest income on LHFI is recognized in the Community Banking segment. The Mortgage Servicing segment services and subservices mortgage 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 provides servicing of residential mortgages for our own LHFI portfolio in the Community Banking segment 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 Mortgage Originations, Mortgage Servicing or Community Banking operating segments. Revenues are comprised of net interest income (before the provision (benefit) for loan losses) and noninterest income. Noninterest expenses and provision (benefit) for income taxes are fully allocated to each operating 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: Three Months Ended September 30, 2018 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 81 $ 36 $ 2 $ 5 $ 124 Net gain (loss) on loan sales (3 ) 46 — — 43 Other noninterest income 10 30 24 — 64 Total net interest income and noninterest income 88 112 26 5 231 (Provision) benefit for loan losses (1 ) — — 3 2 Compensation and benefits (17 ) (26 ) (4 ) (29 ) (76 ) Other noninterest expense and directly allocated overhead (27 ) (41 ) (18 ) (11 ) (97 ) Total noninterest expense (44 ) (67 ) (22 ) (40 ) (173 ) Income (loss) before indirect overhead allocations and income taxes 43 45 4 (32 ) 60 Provision (benefit) for income taxes 7 6 — (1 ) 12 Overhead allocations (9 ) (16 ) (5 ) 30 — Net income (loss) $ 27 $ 23 $ (1 ) $ (1 ) $ 48 Intersegment (expense) revenue $ 1 $ 4 $ 5 $ (10 ) $ — Average balances Loans held-for-sale $ 10 $ 4,383 $ — $ — $ 4,393 Loans with government guarantees — 292 — — 292 Loans held-for-investment (2) 8,868 11 — 29 8,908 Total assets 9,028 5,676 29 3,878 18,611 Deposits 9,170 — 2,072 94 11,336 (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. Three Months Ended September 30, 2017 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 63 $ 34 $ 4 $ 2 $ 103 Net gain (loss) on loan sales (4 ) 79 — — 75 Other noninterest income 8 27 14 6 55 Total net interest income and noninterest income 67 140 18 8 233 (Provision) benefit for loan losses (1 ) (1 ) — — (2 ) Compensation and benefits (15 ) (28 ) (4 ) (29 ) (76 ) Other noninterest expense and directly allocated overhead (25 ) (49 ) (13 ) (8 ) (95 ) Total noninterest expense (40 ) (77 ) (17 ) (37 ) (171 ) Income (loss) before indirect overhead allocations and income taxes 26 62 1 (29 ) 60 Provision (benefit) for income taxes 6 16 (1 ) (1 ) 20 Overhead allocations (10 ) (15 ) (6 ) 31 — Net income (loss) $ 10 $ 31 $ (4 ) $ 3 $ 40 Intersegment (expense) revenue $ (4 ) $ 2 $ 5 $ (3 ) $ — Average balances Loans held-for-sale $ 14 $ 4,462 $ — $ — $ 4,476 Loans with government guarantees — 264 — — 264 Loans held-for-investment (2) 6,789 10 — 29 6,828 Total assets 6,843 5,743 30 3,823 16,439 Deposits 7,498 — 1,507 — 9,005 (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. Nine Months Ended September 30, 2018 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 231 $ 100 $ 5 $ 9 $ 345 Net gain (loss) on loan sales (10 ) 176 — — 166 Other noninterest income 27 76 65 7 175 Total net interest income and noninterest income 248 352 70 16 686 (Provision) benefit for loan losses (2 ) (1 ) — 6 3 Compensation and benefits (51 ) (83 ) (13 ) (89 ) (236 ) Other noninterest expense and directly allocated overhead (81 ) (129 ) (49 ) (28 ) (287 ) Total noninterest expense (132 ) (212 ) (62 ) (117 ) (523 ) Income (loss) before indirect overhead allocations and income taxes 114 139 8 (95 ) 166 Provision (benefit) for income taxes 18 18 (2 ) (1 ) 33 Overhead allocations (29 ) (51 ) (15 ) 95 — Net income (loss) $ 67 $ 70 $ (5 ) $ 1 $ 133 Intersegment (expense) revenue $ (1 ) $ 6 $ 14 $ (19 ) $ — Average balances Loans held-for-sale $ 11 $ 4,254 $ — $ — $ 4,265 Loans with government guarantees — 288 — — 288 Loans held-for-investment (2) 8,250 9 — 29 8,288 Total assets 8,425 5,477 30 3,902 17,834 Deposits 8,581 — 1,800 — 10,381 (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. Nine Months Ended September 30, 2017 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 171 $ 96 $ 9 $ 7 $ 283 Net gain (loss) on loan sales (7 ) 196 — — 189 Other noninterest income 22 77 47 11 157 Total net interest income and noninterest income 186 369 56 18 629 (Provision) benefit for loan losses (3 ) (3 ) — 2 (4 ) Compensation and benefits (46 ) (72 ) (12 ) (89 ) (219 ) Other noninterest expense and directly allocated overhead (67 ) (114 ) (45 ) (20 ) (246 ) Total noninterest expense (113 ) (186 ) (57 ) (109 ) (465 ) Income (loss) before indirect overhead allocations and income taxes 70 180 (1 ) (89 ) 160 Provision (benefit) for income taxes 14 47 (6 ) (3 ) 52 Overhead allocations (30 ) (46 ) (17 ) 93 — Net income (loss) $ 26 $ 87 $ (12 ) $ 7 $ 108 Intersegment (expense) revenue $ (5 ) $ 3 $ 14 $ (12 ) $ — Average balances Loans held-for-sale $ 16 $ 3,998 $ — $ — $ 4,014 Loans with government guarantees — 300 — — 300 Loans held-for-investment (2) 6,201 7 — 29 6,237 Total assets 6,262 5,307 36 3,801 15,406 Deposits 7,438 — 1,409 — 8,847 (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.

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Adoption of New Accounting Standards We adopted the following accounting standard updates (ASU) during 2018 , none of which had a material impact to our financial statements: Standard Description Effective Date ASU 2018-03 Technical Corrections and Improvements to Financial Instruments—Overall (Subtopic 825-10) - Update to 2016-01 January 1, 2018 ASU 2018-02 Income Statement-Reporting Comprehensive Income (Topic 220); Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income January 1, 2019 ASU 2017-09 Update 2017-09—Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting January 1, 2018 ASU 2017-05 Other Income - Gains and Losses from the De-recognition of Non-financial Assets (Subtopic 610-20): Clarifying the Scope of Asset De-recognition Guidance and Accounting for Partial Sales of Non-financial Assets January 1, 2018 ASU 2017-01 Business Combinations (Topic 805): Clarifying the Definition of a Business January 1, 2018 ASU 2016-18 Statement of Cash Flows (Topic 230): Restricted Cash January 1, 2018 ASU 2016-16 Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory January 1, 2018 ASU 2016-15 Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments January 1, 2018 ASU 2016-01 Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities January 1, 2018 Accounting Standards Adopted which had a Material Impact The following ASUs have been adopted which impact our significant accounting policies and/or have a significant financial impact: Revenue from Contracts with Customers - In May 2014, FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)." Under the amended guidance, an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration in exchange for those goods or services. Effective January 1, 2018, we have adopted the requirements of ASU 2014-09, Revenue from Contracts with Customers (Topic 606) and all related amendments. We have implemented the guidance utilizing the modified retrospective approach which did not have a material impact on the Company's financial position or results of operations. As lease contracts and financial instruments, which include loans and securities, are excluded from the scope of this standard, the majority our revenue falls outside of the scope of Topic 606. The adoption of this guidance does not result in changes to how revenue is recognized or the timing of recognition from our method prior to adoption. 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. Three Months Ended September 30, Nine Months Ended September 30, Location of Revenue (1) 2018 2017 2018 2017 (Dollars in millions) Deposit account and other banking income Deposit fees and charges $ 4 $ 4 $ 12 $ 11 Interchange fees Deposit fees and charges 1 1 3 3 Interchange fees Other noninterest income — 1 1 1 Wealth management Other noninterest income 3 2 7 5 Total $ 8 $ 8 $ 23 $ 20 (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. Merchant fee income was less than $1 million for the three and nine months ended September 30, 2018 and September 30, 2017. 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 receive revenue from portfolio management services. We receive payment for portfolio management services in advance at 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 and Hedging - In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The amendments were designed to more closely align hedge accounting requirements with users’ risk management strategies. ASU 2017-12 is effective for fiscal years beginning after December 15, 2018 and early adoption is permitted. The Company has early adopted this ASU during the first quarter of 2018. The guidance provides a broader range of hedge accounting opportunities and simplifies documentation requirements for our existing cash flow hedge relationships. In conjunction with adoption of this ASU, the Company elected to transfer $144 million of investment securities from HTM to AFS during the first quarter of 2018, as permitted by the standard, which resulted in a de minimis impact to AOCI. Accounting Standards Issued But Not Yet Adopted The following ASUs have been issued and are expected to result in a significant change to our significant accounting policies and/or have a significant financial impact: Credit Losses - In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326). The ASU alters the current method for recognizing credit losses within the reserve account. Currently, we use the incurred loss method, whereas the new guidance requires financial assets to be presented at the net amount expected to be collected (i.e., net of expected credit losses). The measurement of 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. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019. Our cross-functional implementation team has developed a project plan that results in running a CECL parallel production in the second half of 2019 and the adoption of the standard in the first quarter of 2020. We are currently evaluating the impact the adoption of the guidance will have on our Consolidated Financial Statements, and highlight that any impact will be contingent upon the underlying characteristics of the affected portfolio and macroeconomic and internal forecasts at adoption date. We do not expect any material allowance on held to maturity securities since the majority of this portfolio consists of agency-backed securities that inherently have an immaterial risk of loss. Leases - In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) which supersedes Topic 840. The guidance requires lessees to recognize substantially all leases on their balance sheet as a right-of-use asset and a lease liability. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Classification will be based on criteria that are largely similar to those applied in current lease accounting. ASU 2016-02 is effective retrospectively for fiscal years beginning after December 15, 2018 and early adoption is permitted. Additional guidance per ASU 2018-11 provides the practical expedient of forgoing the restatement of comparative periods and we intend on exercising this option. Upon adoption and implementation, we expect to gross up assets and liabilities due to the recognition of lease liabilities and right-of-use assets associated with the underlying lease contracts. We do not expect the adoption of the guidance to have a material impact on our Consolidated Statements of Operations given our current inventory of leases. 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: Standard Description Effective Date 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 2018-11 Leases (Topic 842): Targeted Improvements January 1, 2019 ASU 2018-10 Codification Improvements to Topic 842, Leases January 1, 2019 ASU 2018-07 Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting January 1, 2019 ASU 2017-11 Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Non-controlling Interests with a Scope. January 1, 2019 ASU 2017-08 Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities January 1, 2019 ASU 2017-06 Plan Accounting - Defined Benefit Pension Plans (Topic 960), Defined Contribution Pension Plans (Topic 962), Health and Welfare Benefit Plans (Topic 965): Employee Benefit Plan Master Trust Reporting January 1, 2019 ASU 2017-04 Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment January 1, 2020

Recently Issued Accounting Pr_2

Recently Issued Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Credit Quality	Credit Quality We utilize an internal risk rating system which is applied to all consumer and commercial loans. Descriptions of our internal 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. They 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. Nonperforming loans are classified as either substandard, doubtful or loss. 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 non-accrual. 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, but, rather that it is not practical or desirable to defer writing off the asset even though partial recovery may occur in the future.
Derivative Financial Instruments	Derivative financial instruments are recorded at fair value in other assets and other liabilities on the Consolidated Statements of Financial Condition. The Company's policy is to present its 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, 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 fair value of derivatives not designated as hedging instruments are recognized in the Consolidated Statements of Income. Derivatives designated as hedging instruments: We have designated certain interest rate swaps as fair value hedges of fixed rate certificates of deposit. During the second quarter of 2018, we de-designated all of our remaining cash flow hedge relationships. The fair value of our derivatives designated as cash flow hedges are recorded in other comprehensive income (loss) on the Consolidated Statement of Financial Condition and reclassified into interest expense in the same period in which the hedged transaction is recognized in earnings. At September 30, 2018 , we had $23 million (net-of-tax) of accumulated unrealized gains on derivatives previously designated as cash flow hedges recorded in accumulated other comprehensive income, compared to $2 million (net-of-tax) of accumulated unrealized gains on derivatives designated as cash flow hedges recorded in accumulated other comprehensive income at December 31, 2017 . We evaluate the probability of hedged transactions occurring on at least a quarterly basis relating to amounts deferred in OCI. The estimated amount scheduled to be reclassified from other comprehensive income into earnings during the next 12 months represents $3 million of gains (net-of-tax). For further information, see Note 11 - Accumulated Other Comprehensive Income. Derivatives that are designated in hedging relationships are assessed for effectiveness using regression analysis at inception. All hedge relationships were highly effective as of September 30, 2018 . Cash flows and the income impact associated with designated hedges are reported in the same line item as the underlying hedged item.
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. For further information see the Fair Value Measurements section of Item 7 of Exhibit 99.1 to our June 1, 2018 Form 8-K Report
Recently Issued Accounting Pronouncements	Adoption of New Accounting Standards We adopted the following accounting standard updates (ASU) during 2018 , none of which had a material impact to our financial statements: Standard Description Effective Date ASU 2018-03 Technical Corrections and Improvements to Financial Instruments—Overall (Subtopic 825-10) - Update to 2016-01 January 1, 2018 ASU 2018-02 Income Statement-Reporting Comprehensive Income (Topic 220); Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income January 1, 2019 ASU 2017-09 Update 2017-09—Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting January 1, 2018 ASU 2017-05 Other Income - Gains and Losses from the De-recognition of Non-financial Assets (Subtopic 610-20): Clarifying the Scope of Asset De-recognition Guidance and Accounting for Partial Sales of Non-financial Assets January 1, 2018 ASU 2017-01 Business Combinations (Topic 805): Clarifying the Definition of a Business January 1, 2018 ASU 2016-18 Statement of Cash Flows (Topic 230): Restricted Cash January 1, 2018 ASU 2016-16 Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory January 1, 2018 ASU 2016-15 Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments January 1, 2018 ASU 2016-01 Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities January 1, 2018 Accounting Standards Adopted which had a Material Impact The following ASUs have been adopted which impact our significant accounting policies and/or have a significant financial impact: Revenue from Contracts with Customers - In May 2014, FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)." Under the amended guidance, an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration in exchange for those goods or services. Effective January 1, 2018, we have adopted the requirements of ASU 2014-09, Revenue from Contracts with Customers (Topic 606) and all related amendments. We have implemented the guidance utilizing the modified retrospective approach which did not have a material impact on the Company's financial position or results of operations. As lease contracts and financial instruments, which include loans and securities, are excluded from the scope of this standard, the majority our revenue falls outside of the scope of Topic 606. The adoption of this guidance does not result in changes to how revenue is recognized or the timing of recognition from our method prior to adoption. 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. Three Months Ended September 30, Nine Months Ended September 30, Location of Revenue (1) 2018 2017 2018 2017 (Dollars in millions) Deposit account and other banking income Deposit fees and charges $ 4 $ 4 $ 12 $ 11 Interchange fees Deposit fees and charges 1 1 3 3 Interchange fees Other noninterest income — 1 1 1 Wealth management Other noninterest income 3 2 7 5 Total $ 8 $ 8 $ 23 $ 20 (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. Merchant fee income was less than $1 million for the three and nine months ended September 30, 2018 and September 30, 2017. 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 receive revenue from portfolio management services. We receive payment for portfolio management services in advance at 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 and Hedging - In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The amendments were designed to more closely align hedge accounting requirements with users’ risk management strategies. ASU 2017-12 is effective for fiscal years beginning after December 15, 2018 and early adoption is permitted. The Company has early adopted this ASU during the first quarter of 2018. The guidance provides a broader range of hedge accounting opportunities and simplifies documentation requirements for our existing cash flow hedge relationships. In conjunction with adoption of this ASU, the Company elected to transfer $144 million of investment securities from HTM to AFS during the first quarter of 2018, as permitted by the standard, which resulted in a de minimis impact to AOCI. Accounting Standards Issued But Not Yet Adopted The following ASUs have been issued and are expected to result in a significant change to our significant accounting policies and/or have a significant financial impact: Credit Losses - In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326). The ASU alters the current method for recognizing credit losses within the reserve account. Currently, we use the incurred loss method, whereas the new guidance requires financial assets to be presented at the net amount expected to be collected (i.e., net of expected credit losses). The measurement of 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. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019. Our cross-functional implementation team has developed a project plan that results in running a CECL parallel production in the second half of 2019 and the adoption of the standard in the first quarter of 2020. We are currently evaluating the impact the adoption of the guidance will have on our Consolidated Financial Statements, and highlight that any impact will be contingent upon the underlying characteristics of the affected portfolio and macroeconomic and internal forecasts at adoption date. We do not expect any material allowance on held to maturity securities since the majority of this portfolio consists of agency-backed securities that inherently have an immaterial risk of loss. Leases - In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) which supersedes Topic 840. The guidance requires lessees to recognize substantially all leases on their balance sheet as a right-of-use asset and a lease liability. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Classification will be based on criteria that are largely similar to those applied in current lease accounting. ASU 2016-02 is effective retrospectively for fiscal years beginning after December 15, 2018 and early adoption is permitted. Additional guidance per ASU 2018-11 provides the practical expedient of forgoing the restatement of comparative periods and we intend on exercising this option. Upon adoption and implementation, we expect to gross up assets and liabilities due to the recognition of lease liabilities and right-of-use assets associated with the underlying lease contracts. We do not expect the adoption of the guidance to have a material impact on our Consolidated Statements of Operations given our current inventory of leases. 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: Standard Description Effective Date 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 2018-11 Leases (Topic 842): Targeted Improvements January 1, 2019 ASU 2018-10 Codification Improvements to Topic 842, Leases January 1, 2019 ASU 2018-07 Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting January 1, 2019 ASU 2017-11 Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Non-controlling Interests with a Scope. January 1, 2019 ASU 2017-08 Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities January 1, 2019 ASU 2017-06 Plan Accounting - Defined Benefit Pension Plans (Topic 960), Defined Contribution Pension Plans (Topic 962), Health and Welfare Benefit Plans (Topic 965): Employee Benefit Plan Master Trust Reporting January 1, 2019 ASU 2017-04 Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment January 1, 2020

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule of Trading and Available-for-sale Securities	The following table presents our investment securities: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Dollars in millions) September 30, 2018 Available-for-sale securities Agency - Commercial $ 1,142 $ — $ (48 ) $ 1,094 Agency - Residential 713 — (39 ) 674 Municipal obligations 33 — (1 ) 32 Corporate debt obligations 41 — — 41 Other MBS 16 — — 16 Total available-for-sale securities (1) $ 1,945 $ — $ (88 ) $ 1,857 Held-to-maturity securities Agency - Commercial $ 357 $ — $ (17 ) $ 340 Agency - Residential 367 — (17 ) 350 Total held-to-maturity securities (1) $ 724 $ — $ (34 ) $ 690 December 31, 2017 Available-for-sale securities Agency - Commercial $ 1,004 $ — $ (17 ) $ 987 Agency - Residential 811 — (17 ) 794 Municipal obligations 35 — (1 ) 34 Corporate debt obligations 37 1 — 38 Total available-for-sale securities (1) $ 1,887 $ 1 $ (35 ) $ 1,853 Held-to-maturity securities Agency - Commercial $ 526 $ — $ (9 ) $ 517 Agency - Residential 413 — (6 ) 407 Total held-to-maturity securities (1) $ 939 $ — $ (15 ) $ 924 (1) There were no securities of a single issuer, which are not governmental or government-sponsored, that exceeded 10 percent of stockholders’ equity at September 30, 2018 or December 31, 2017 .
Debt Securities, Available-for-sale	The following table summarizes, by duration, the unrealized loss positions on investment securities: Unrealized Loss Position with Duration 12 Months and Over Unrealized Loss Position with Duration Under 12 Months Fair Value Number of Securities Unrealized Loss Fair Value Number of Securities Unrealized Loss (Dollars in millions) September 30, 2018 Available-for-sale securities Agency - Commercial $ 819 54 $ (41 ) $ 274 23 $ (7 ) Agency - Residential 535 57 (34 ) 139 27 (5 ) Municipal obligations 25 11 (1 ) 6 10 — Corporate debt obligations — — — 13 4 — Other MBS — — — 14 1 — Held-to-maturity securities Agency - Commercial $ 330 25 $ (17 ) $ 10 1 $ — Agency - Residential 292 46 (15 ) 58 14 (2 ) December 31, 2017 Available-for-sale securities Agency - Commercial $ 218 20 $ (7 ) $ 744 41 $ (11 ) Agency - Residential 452 36 (14 ) 263 33 (3 ) Municipal obligations 6 3 — 22 9 — Corporate debt obligations — — — 3 1 — Held-to-maturity securities Agency - Commercial $ 348 25 $ (8 ) $ 99 8 $ (1 ) Agency - Residential 111 16 (3 ) 293 43 (3 )
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	The following table summarizes, by duration, the unrealized loss positions on investment securities: Unrealized Loss Position with Duration 12 Months and Over Unrealized Loss Position with Duration Under 12 Months Fair Value Number of Securities Unrealized Loss Fair Value Number of Securities Unrealized Loss (Dollars in millions) September 30, 2018 Available-for-sale securities Agency - Commercial $ 819 54 $ (41 ) $ 274 23 $ (7 ) Agency - Residential 535 57 (34 ) 139 27 (5 ) Municipal obligations 25 11 (1 ) 6 10 — Corporate debt obligations — — — 13 4 — Other MBS — — — 14 1 — Held-to-maturity securities Agency - Commercial $ 330 25 $ (17 ) $ 10 1 $ — Agency - Residential 292 46 (15 ) 58 14 (2 ) December 31, 2017 Available-for-sale securities Agency - Commercial $ 218 20 $ (7 ) $ 744 41 $ (11 ) Agency - Residential 452 36 (14 ) 263 33 (3 ) Municipal obligations 6 3 — 22 9 — Corporate debt obligations — — — 3 1 — Held-to-maturity securities Agency - Commercial $ 348 25 $ (8 ) $ 99 8 $ (1 ) Agency - Residential 111 16 (3 ) 293 43 (3 )
Schedule of Available-for-sale Securities, by Contractual Maturity Date	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 Cost Fair Value Weighted Average Yield Amortized Cost Fair Value Weighted Average Yield (Dollars in millions) September 30, 2018 Due after one year through five years $ 60 $ 58 2.51 % $ 10 $ 10 2.45 % Due after five years through 10 years 60 59 4.40 % 11 11 2.21 % Due after 10 years 1,825 1,740 2.43 % 703 669 2.46 % Total $ 1,945 $ 1,857 $ 724 $ 690

Loans Held-for-Investment (Tabl

Loans Held-for-Investment (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Schedule of Loans Held-for-investment	The following table presents our loans held-for-investment: September 30, 2018 December 31, 2017 (Dollars in millions) Consumer loans Residential first mortgage $ 3,085 $ 2,754 Home equity 704 664 Other 150 25 Total consumer loans 3,939 3,443 Commercial loans Commercial real estate 2,160 1,932 Commercial and industrial 1,317 1,196 Warehouse lending 1,550 1,142 Total commercial loans 5,027 4,270 Total loans held-for-investment $ 8,966 $ 7,713 The following table presents the UPB of our loan sales and purchases in the loans held-for-investment portfolio: Nine Months Ended September 30, 2018 2017 (Dollars in millions) Loans Sold (1) Performing loans $ 4 $ 78 Nonperforming loans — 25 Total performing and nonperforming loans sold $ 4 $ 103 Net gain associated with loan sales (2) $ — $ 1 Loans Purchased Residential first mortgage loans $ — $ 6 HELOC — 100 Total loans purchased $ — $ 106 Premium associated with loans purchased $ — $ 4 (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 Consolidated Statement of Operations
Allowance for Loan Losses	The following table presents changes in ALLL, by class of loan: Residential First Mortgage (1) Home Equity Other Consumer Commercial Real Estate Commercial and Industrial Warehouse Lending Total (Dollars in millions) Three Months Ended September 30, 2018 Beginning balance ALLL $ 45 $ 19 $ 1 $ 45 $ 21 $ 6 $ 137 Charge-offs (2 ) — — — — — (2 ) Recoveries 1 — — — — — 1 Provision (benefit) (4 ) 1 1 1 (1 ) — (2 ) Ending balance ALLL $ 40 $ 20 $ 2 $ 46 $ 20 $ 6 $ 134 Three Months Ended September 30, 2017 Beginning balance ALLL $ 56 $ 19 $ 1 $ 37 $ 21 $ 6 $ 140 Charge-offs (1 ) (2 ) — — — — (3 ) Recoveries — 1 — — — — 1 Provision (benefit) (3 ) 2 — 5 (2 ) — 2 Ending balance ALLL $ 52 $ 20 $ 1 $ 42 $ 19 $ 6 $ 140 Nine Months Ended September 30, 2018 Beginning balance ALLL $ 47 $ 22 $ 1 $ 45 $ 19 $ 6 $ 140 Charge-offs (3 ) (2 ) (1 ) — — — (6 ) Recoveries 1 2 — — — — 3 Provision (benefit) (5 ) (2 ) 2 1 1 — (3 ) Ending balance ALLL $ 40 $ 20 $ 2 $ 46 $ 20 $ 6 $ 134 Nine Months Ended September 30, 2017 Beginning balance ALLL $ 65 $ 24 $ 1 $ 28 $ 17 $ 7 $ 142 Charge-offs (6 ) (3 ) (1 ) — — — (10 ) Recoveries 1 2 1 — — — 4 Provision (benefit) (8 ) (3 ) — 14 2 (1 ) 4 Ending balance ALLL $ 52 $ 20 $ 1 $ 42 $ 19 $ 6 $ 140 (1) Includes loans with government guarantees. The following table sets forth the method of evaluation, by class of loan: Residential First Mortgage (1) Home Equity Other Consumer Commercial Real Estate Commercial and Industrial Warehouse Lending Total (Dollars in millions) September 30, 2018 Loans held-for-investment (2) Individually evaluated $ 33 $ 24 $ — $ — $ — $ — $ 57 Collectively evaluated 3,044 677 150 2,160 1,317 1,550 8,898 Total loans $ 3,077 $ 701 $ 150 $ 2,160 $ 1,317 $ 1,550 $ 8,955 Allowance for loan losses (2) Individually evaluated $ 5 $ 8 $ — $ — $ — $ — $ 13 Collectively evaluated 35 12 2 46 20 6 121 Total allowance for loan losses $ 40 $ 20 $ 2 $ 46 $ 20 $ 6 $ 134 December 31, 2017 Loans held-for-investment (2) Individually evaluated $ 34 $ 27 $ — $ — $ — $ — $ 61 Collectively evaluated 2,712 633 25 1,932 1,196 1,142 7,640 Total loans $ 2,746 $ 660 $ 25 $ 1,932 $ 1,196 $ 1,142 $ 7,701 Allowance for loan losses (2) Individually evaluated $ 6 $ 10 $ — $ — $ — $ — $ 16 Collectively evaluated 41 12 1 45 19 6 124 Total allowance for loan losses $ 47 $ 22 $ 1 $ 45 $ 19 $ 6 $ 140 (1) Includes allowance related to loans with government guarantees. (2) Excludes loans carried under the fair value option.
Past Due Loans	The following table sets forth the LHFI aging analysis of past due and current loans: 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due (1)(2) Total Past Due Current Total LHFI (Dollars in millions) September 30, 2018 Consumer loans Residential first mortgage $ 1 $ 1 $ 20 $ 22 $ 3,063 $ 3,085 Home equity 1 — 5 6 698 704 Other — — — — 150 150 Total consumer loans 2 1 25 28 3,911 3,939 Commercial loans Commercial real estate — — — — 2,160 2,160 Commercial and industrial — — — — 1,317 1,317 Warehouse lending — — — — 1,550 1,550 Total commercial loans — — — — 5,027 5,027 Total loans $ 2 $ 1 $ 25 $ 28 $ 8,938 $ 8,966 December 31, 2017 Consumer loans Residential first mortgage $ 2 $ 2 $ 23 $ 27 $ 2,727 $ 2,754 Home Equity 1 — 6 7 657 664 Other — — — — 25 25 Total consumer loans 3 2 29 34 3,409 3,443 Commercial loans Commercial real estate — — — — 1,932 1,932 Commercial and industrial — — — — 1,196 1,196 Warehouse lending — — — — 1,142 1,142 Total commercial loans — — — — 4,270 4,270 Total loans $ 3 $ 2 $ 29 $ 34 $ 7,679 $ 7,713 (1) Includes less than 90 day past due performing loans which are deemed nonaccrual. Interest is not being accrued on these loans. (2) Includes $4 million of loans accounted for under the fair value option at both September 30, 2018 and December 31, 2017
Troubled Debt Restructurings	The following table provides a summary of TDRs by type and performing status: TDRs Performing Nonperforming Total (Dollars in millions) September 30, 2018 Consumer loans Residential first mortgage $ 22 $ 9 $ 31 Home equity 21 4 25 Total TDRs (1)(2) $ 43 $ 13 $ 56 December 31, 2017 Consumer loans Residential first mortgage $ 19 $ 12 $ 31 Home Equity 24 4 28 Total TDRs (1)(2) $ 43 $ 16 $ 59 (1) The ALLL on TDR loans totaled $11 million and $13 million at September 30, 2018 and December 31, 2017 , respectively. (2) Includes $3 million of TDR loans accounted for under the fair value option at both September 30, 2018 and December 31, 2017 . The following table provides a summary of newly modified TDRs: New TDRs Number of Accounts Pre-Modification Unpaid Principal Balance Post-Modification Unpaid Principal Balance (1) Increase in Allowance at Modification (Dollars in millions) Three Months Ended September 30, 2018 Residential first mortgages 2 $ — $ — $ — Home equity (2)(3) 6 1 1 — Total TDR loans 8 $ 1 $ 1 $ — Three Months Ended September 30, 2017 Residential first mortgages 9 $ 3 $ 3 $ — Home equity (2)(3) 37 2 2 1 Total TDR loans 46 $ 5 $ 5 $ 1 Nine Months Ended September 30, 2018 Residential first mortgages 13 $ 2 $ 2 $ — Home equity (2)(3) 14 1 1 — Total TDR loans 27 $ 3 $ 3 $ — Nine Months Ended September 30, 2017 Residential first mortgages 17 $ 4 $ 4 $ — Home equity (2)(3) 71 5 5 2 Other consumer 1 — — — Total TDR loans 89 $ 9 $ 9 $ 2 (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 the fair value option.
Impaired Loans	The following table presents individually evaluated impaired loans and the associated allowance: September 30, 2018 December 31, 2017 Recorded Investment Net Unpaid Principal Balance Related Allowance Recorded Investment Net Unpaid Principal Balance Related Allowance (Dollars in millions) With no related allowance recorded Consumer loans Residential first mortgage $ 13 $ 16 $ — $ 11 $ 12 $ — Home equity 1 4 — — — — Total loans with no related allowance recorded $ 14 $ 20 $ — $ 11 $ 12 $ — With an allowance recorded Consumer loans Residential first mortgage $ 20 $ 21 $ 5 $ 22 $ 22 $ 6 Home equity 23 24 8 24 27 10 Total loans with an allowance recorded $ 43 $ 45 $ 13 $ 46 $ 49 $ 16 Total Impaired loans Consumer Loans Residential first mortgage $ 33 $ 37 $ 5 $ 33 $ 34 $ 6 Home equity 24 28 8 24 27 10 Total impaired loans $ 57 $ 65 $ 13 $ 57 $ 61 $ 16 The following table presents average impaired loans and the interest income recognized: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in millions) Consumer loans Residential first mortgage $ 34 $ 1 $ 37 $ 1 $ 34 $ 1 $ 39 $ 1 Home equity 24 — 28 — 25 1 28 1 Commercial loans Commercial real estate — — 1 — — — — — Commercial and industrial — — — — 2 — — — Total impaired loans $ 58 $ 1 $ 66 $ 1 $ 61 $ 2 $ 67 $ 2
Loan Credit Quality Indicators	September 30, 2018 Pass Watch Special Mention Substandard Total Loans (Dollars in millions) Consumer Loans Residential first mortgage $ 3,037 $ 27 $ — $ 21 $ 3,085 Home equity 678 21 — 5 704 Other consumer 150 — — — 150 Total consumer loans $ 3,865 $ 48 $ — $ 26 $ 3,939 Commercial Loans Commercial real estate $ 2,135 $ 23 $ — $ 2 $ 2,160 Commercial and industrial 1,228 52 37 — 1,317 Warehouse 1,445 90 15 — 1,550 Total commercial loans $ 4,808 $ 165 $ 52 $ 2 $ 5,027 December 31, 2017 Pass Watch Special Mention Substandard Total Loans (Dollars in millions) Consumer Loans Residential first mortgage $ 2,706 $ 23 $ — $ 25 $ 2,754 Home equity 633 25 — 6 664 Other consumer 25 — — — 25 Total consumer loans $ 3,364 $ 48 $ — $ 31 $ 3,443 Commercial Loans Commercial real estate $ 1,902 $ 23 $ 7 $ — $ 1,932 Commercial and industrial 1,135 32 24 5 1,196 Warehouse 1,014 128 — — 1,142 Total commercial loans $ 4,051 $ 183 $ 31 $ 5 $ 4,270

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	9 Months Ended
	Sep. 30, 2018
Transfers and Servicing [Abstract]
Schedule of Servicing Assets at Fair Value	Changes in the fair value of residential first mortgage MSRs were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Balance at beginning of period $ 257 $ 184 $ 291 $ 335 Additions from loans sold with servicing retained 100 75 283 178 Reductions from sales (51 ) (4 ) (273 ) (260 ) Changes in fair value due to (1): Decrease in MSR value due to pay-offs, pay-downs and run-off (3 ) (5 ) (11 ) (15 ) Changes in estimates of fair value (2) 10 (4 ) 23 8 Fair value of MSRs at end of period $ 313 $ 246 $ 313 $ 246 (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.
Schedule of Sensitivity Analysis of Fair Value	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: September 30, 2018 December 31, 2017 Fair value impact due to Fair value impact due to Actual 10% adverse change 20% adverse change Actual 10% adverse change 20% adverse change (Dollars in millions) (Dollars in millions) Option adjusted spread 5.03 % $ 308 $ 304 6.29 % $ 286 $ 282 Constant prepayment rate 8.98 % 303 294 9.93 % 283 277 Weighted average cost to service per loan $ 80.79 310 307 $ 73.00 288 286
Schedule of Servicing Assets at Fair Value, Servicing Fees	The following table summarizes income and fees associated with owned mortgage servicing rights: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Net return on mortgage servicing rights Servicing fees, ancillary income and late fees (1) $ 17 $ 14 $ 46 $ 43 Changes in fair value 7 (9 ) 12 (7 ) Gain (loss) on MSR derivatives (2) (11 ) — (27 ) (3 ) Net transaction costs — 1 (5 ) (7 ) Total return included in net return on mortgage servicing rights $ 13 $ 6 $ 26 $ 26 (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: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Loan administration income on mortgage loans subserviced Servicing fees, ancillary income and late fees (1) $ 14 $ 9 $ 36 $ 26 Other servicing charges (9 ) (4 ) (21 ) (10 ) Total income on mortgage loans subserviced, included in loan administration $ 5 $ 5 $ 15 $ 16 (1) Servicing fees are recorded on an accrual basis. Ancillary income and late fees are recorded on cash basis.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Financial Instruments	The following table presents the net gain (loss) recognized on designated instruments, net of the impact of offsetting positions: Amount Recorded in Net Interest Income (1) Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Gain on cash flow hedging relationships in interest contracts Amount of gain reclassified from AOCI into income $ 1 $ — $ — $ 5 Total gain on hedges $ 1 $ — $ — $ 5 (1) We had no gain/(loss) on fair value hedging relationships in interest contracts for the three and nine months ending September 30, 2018 and September 30, 2017 . The following table presents the notional amount, estimated fair value and maturity of our derivative financial instruments: September 30, 2018 (1) Notional Amount Fair Value (2) Expiration Dates (Dollars in millions) Derivatives in fair value hedge relationships: Liabilities Interest rate swaps on CDs $ 30 $ — 2019 Derivatives not designated as hedging instruments: Assets Futures $ 2,494 $ — 2018-2023 Mortgage backed securities forwards 4,670 19 2018 Rate lock commitments 3,121 20 2018-2019 Interest rate swaps and swaptions 2,195 23 2018-2038 Total derivative assets $ 12,480 $ 62 Liabilities Futures $ 309 $ — 2018-2023 Mortgage backed securities forwards 1,903 6 2018 Rate lock commitments 419 1 2018 Interest rate swaps 765 13 2018-2048 Total derivative liabilities $ 3,396 $ 20 December 31, 2017 (1) Notional Amount Fair Value (2) Expiration Dates (Dollars in millions) Derivatives in cash flow hedge relationships: Liabilities Interest rate swaps on FHLB advances $ 830 $ 1 2023-2026 Derivatives not designated as hedging instruments: Assets Futures $ 1,597 $ — 2018-2022 Mortgage backed securities forwards 2,646 4 2018 Rate lock commitments 3,629 24 2018 Interest rate swaps and swaptions 1,441 11 2018-2048 Total derivative assets $ 9,313 $ 39 Liabilities Futures $ 209 $ — 2018-2021 Mortgage backed securities forwards 3,197 6 2018 Rate lock commitments 214 — 2018 Interest rate swaps 617 4 2018-2027 Total derivative liabilities $ 4,237 $ 10 (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.
Offsetting of Derivatives	The following tables present the derivatives subject to a master netting arrangement, including the cash pledged as collateral: Gross Amounts Netted in the Statement of Financial Position Net Amount Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Gross Amount Financial Instruments Cash Collateral (Dollars in millions) September 30, 2018 Derivatives not designated as hedging instruments: Assets Mortgage backed securities forwards $ 19 $ — $ 19 $ — $ 18 Interest rate swaps and swaptions (1) 23 — 23 — 26 Total derivative assets $ 42 $ — $ 42 $ — $ 44 Liabilities Futures $ — $ — $ — $ — $ 2 Mortgage backed securities forwards 6 — 6 — 2 Interest rate swaps (1) 13 — 13 — 20 Total derivative liabilities $ 19 $ — $ 19 $ — $ 24 December 31, 2017 Derivatives designated as hedging instruments: Liabilities Interest rate swaps on FHLB advances (1) $ 1 $ — $ 1 $ — $ 17 Derivatives not designated as hedging instruments: Assets Mortgage-backed securities forwards $ 4 $ — $ 4 $ — $ 8 Interest rate swaps and swaptions (1) 11 — 11 — 10 Total derivative assets $ 15 $ — $ 15 $ — $ 18 Liabilities Futures $ — $ — $ — $ — $ 2 Mortgage-backed securities forwards 6 — 6 — 2 Interest rate swaps (1) 4 — 4 — 5 Total derivative liabilities $ 10 $ — $ 10 $ — $ 9 (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 Changes in Fair Value of Derivative Instruments	The following table presents net gain (loss) recognized in income on derivative instruments, net of the impact of offsetting positions: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Derivatives not designated as hedging instruments: Location of Gain (Loss) Futures Net return on mortgage servicing rights $ (1 ) $ (1 ) $ (4 ) $ (1 ) Interest rate swaps and swaptions Net return on mortgage servicing rights (8 ) (2 ) (16 ) (7 ) Mortgage-backed securities forwards Net return on mortgage servicing rights (2 ) 2 (6 ) 5 Rate lock commitments and forward agency and loan sales Net gain on loan sales 21 (8 ) 12 (16 ) Interest rate swaps (1) Other noninterest income 1 — 2 1 Total derivative gain (loss) $ 11 $ (9 ) $ (12 ) $ (18 ) (1) Includes customer-initiated commercial interest rate swaps.

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Schedule of FHLB Advances, by Interest Rate Type	The following is a breakdown of our FHLB advances outstanding: September 30, 2018 December 31, 2017 Amount Rate Amount Rate (Dollars in millions) Short-term fixed rate term advances $ 3,194 2.18 % $ 4,260 1.40 % Short-term variable adjustable rate (1) 5 2.54 % — — % Total Short-term Federal Home Loan Bank advances 3,199 4,260 Long-term LIBOR adjustable advances 1,130 2.55 % 1,130 1.76 % Long-term fixed rate advances (2) 150 1.53 % 275 1.41 % Total Long-term Federal Home Loan Bank advances 1,280 1,405 Total Federal Home Loan Bank advances $ 4,479 $ 5,665 (1) Includes short-term variable adjustable rate federal funds line of credit. (2) Includes the current portion of fixed rate advances of $50 million and $125 million at September 30, 2018 and December 31, 2017 , respectively.
Schedule of FHLB Advances, Disclosures	The following table contains detailed information on our FHLB advances and other borrowings: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Maximum outstanding at any month end $ 5,085 $ 5,365 $ 5,740 $ 5,365 Average outstanding balance 4,745 5,043 4,996 4,239 Average remaining borrowing capacity 2,165 1,182 1,830 1,297 Weighted average interest rate 2.08 % 1.36 % 1.88 % 1.26 %
Schedule of FHLB, Advances, Maturity Summary	The following table outlines the maturity dates of our FHLB advances and other borrowings: September 30, 2018 (Dollars in millions) 2018 $ 3,199 2019 50 2020 — 2021 — Thereafter 1,230 Total $ 4,479
Schedule of Long-Term Debt Instruments	The following table presents long-term debt, net of debt issuance costs: September 30, 2018 December 31, 2017 Amount Interest Rate Amount Interest Rate (Dollars in millions) Senior Notes Senior notes, matures 2021 $ 248 6.125 % $ 247 6.125 % Trust Preferred Securities Floating Three Month LIBOR Plus: 3.25%, matures 2032 $ 26 5.62 % $ 26 4.92 % 3.25%, matures 2033 26 5.59 % 26 4.61 % 3.25%, matures 2033 26 5.59 % 26 4.94 % 2.00%, matures 2035 26 4.34 % 26 3.36 % 2.00%, matures 2035 26 4.34 % 26 3.36 % 1.75%, matures 2035 51 4.08 % 51 3.34 % 1.50%, matures 2035 25 3.84 % 25 2.86 % 1.45%, matures 2037 25 3.78 % 25 3.04 % 2.50%, matures 2037 16 4.83 % 16 4.09 % Total Trust Preferred Securities 247 247 Total other long-term debt $ 495 $ 494

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table sets forth the components in accumulated other comprehensive income (loss): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Investment securities Beginning balance $ (56 ) $ (6 ) $ (18 ) $ (8 ) Unrealized gain (loss) (11 ) — (55 ) 2 Less: Tax provision (benefit) (2 ) — (13 ) 1 Net unrealized gain (loss) (9 ) — (42 ) 1 Reclassifications out of AOCI (1) — 1 — 3 Less: Tax provision — — — 1 Net unrealized gain reclassified out of AOCI — 1 — 2 Reclassification of certain income tax effects (2) — — (5 ) — Other comprehensive income (loss), net of tax (9 ) 1 (47 ) 3 Ending balance $ (65 ) $ (5 ) $ (65 ) $ (5 ) Cash Flow Hedges Beginning balance $ 24 $ (3 ) $ 2 $ 1 Unrealized gain (loss) — — 28 (2 ) Less: Tax provision (benefit) — — 7 (1 ) Net unrealized gain (loss) — — 21 (1 ) Reclassifications out of AOCI (1) (1 ) — — (5 ) Less: Tax provision (benefit) — — — (2 ) Net unrealized gain (loss) reclassified out of AOCI (1 ) — — (3 ) Other comprehensive income (loss), net of tax (1 ) — 21 (4 ) Ending balance $ 23 $ (3 ) $ 23 $ (3 ) (1) Reclassifications are reported in interest expense 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)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Earnings	The following table sets forth the computation of basic and diluted earnings per share of common stock: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions, except share data) Net income $ 48 $ 40 $ 133 $ 108 Weighted Average Shares Weighted average common shares outstanding 57,600,360 57,162,025 57,483,802 57,062,696 Effect of dilutive securities May Investor Warrants — — — 16,383 Stock-based awards 732,238 1,024,568 818,118 1,054,217 Weighted average diluted common shares 58,332,598 58,186,593 58,301,920 58,133,296 Earnings per common share Basic earnings per common share $ 0.84 $ 0.71 $ 2.32 $ 1.90 Effect of dilutive securities May Investor Warrants — — — — Stock-based awards (0.01 ) (0.01 ) (0.04 ) (0.04 ) Diluted earnings per common share $ 0.83 $ 0.70 $ 2.28 $ 1.86

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	The following table summarizes restricted stock and restricted stock units activity: Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Shares Weighted — Average Grant-Date Fair Value per Share Shares Weighted — Average Grant-Date Fair Value per Share Restricted Stock and Restricted Stock Units Non-vested balance at beginning of period 1,796,628 $ 27.33 1,290,450 $ 20.52 Granted — — 863,342 34.36 Vested (4,901 ) 26.73 (239,688 ) 19.68 Canceled and forfeited (8,312 ) 31.23 (130,689 ) 20.72 Non-vested balance at end of period 1,783,415 $ 27.32 1,783,415 $ 27.32

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Provision (Benefit)	The following table presents our provision for income tax and effective tax provision rate: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Provision for income taxes $ 12 $ 20 $ 33 $ 52 Effective tax provision rate 20.0 % 32.4 % 20.1 % 32.3 %

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2018
Regulatory Capital Requirements [Abstract]
Schedule of Regulatory Capital Ratios	The following tables present the regulatory capital ratios as of the dates indicated: Flagstar Bancorp Actual For Capital Adequacy Purposes Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in millions) September 30, 2018 Tangible capital (to adjusted avg. total assets) $ 1,540 8.36 % N/A N/A N/A N/A Tier 1 leverage (to adjusted avg. total assets) 1,540 8.36 % $ 737 4.00 % $ 921 5.00 % Common equity Tier 1 capital (to RWA) 1,300 11.01 % 532 4.50 % 768 6.50 % Tier 1 capital (to RWA) 1,540 13.04 % 709 6.00 % 945 8.00 % Total capital (to RWA) 1,677 14.20 % 945 8.00 % 1,181 10.00 % December 31, 2017 Tangible capital (to adjusted avg. total assets) $ 1,442 8.51 % N/A N/A N/A N/A Tier 1 leverage (to adjusted avg. total assets) 1,442 8.51 % $ 678 4.0 % $ 848 5.0 % Common equity Tier 1 capital (to RWA) 1,216 11.50 % 476 4.5 % 688 6.5 % Tier 1 capital (to RWA) 1,442 13.63 % 635 6.0 % 846 8.0 % Total capital (to RWA) 1,576 14.90 % 846 8.0 % 1,058 10.0 % N/A - Not applicable Flagstar Bank Actual For Capital Adequacy Purposes Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in millions) September 30, 2018 Tangible capital (to adjusted avg. total assets) $ 1,617 8.77 % N/A N/A N/A N/A Tier 1 leverage (to adjusted avg. total assets) 1,617 8.77 % $ 737 4.00 % $ 922 5.00 % Common equity tier 1 capital (to RWA) 1,617 13.68 % 532 4.50 % 768 6.50 % Tier 1 capital (to RWA) 1,617 13.68 % 709 6.00 % 945 8.00 % Total capital (to RWA) 1,753 14.84 % 945 8.00 % 1,182 10.00 % December 31, 2017 Tangible capital (to adjusted avg. total assets) $ 1,531 9.04 % N/A N/A N/A N/A Tier 1 leverage (to adjusted avg. total assets) 1,531 9.04 % $ 677 4.0 % $ 847 5.0 % Common equity tier 1 capital (to RWA) 1,531 14.46 % 476 4.5 % 688 6.5 % Tier 1 capital (to RWA) 1,531 14.46 % 635 6.0 % 847 8.0 % Total capital (to RWA) 1,664 15.72 % 847 8.0 % 1,059 10.0 % N/A - Not applicable

Legal Proceedings, Contingenc_2

Legal Proceedings, Contingencies and Commitments (Tables)	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Summary of Contractual Amount of Significant Commitments	The following table is a summary of the contractual amount of significant commitments: September 30, 2018 December 31, 2017 (Dollars in millions) Commitments to extend credit Mortgage loans interest-rate lock commitments $ 3,567 $ 3,667 Warehouse loan commitments 2,422 1,618 Commercial and industrial commitments 728 695 Other commercial commitments 1,063 1,021 HELOC commitments 395 283 Other consumer commitments 123 15 Standby and commercial letters of credit 66 50

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables present the financial instruments carried at fair value by caption on the Consolidated Statement of Financial Condition and by level in the valuation hierarchy. September 30, 2018 Level 1 Level 2 Level 3 Total Fair Value (Dollars in millions) Investment securities available-for-sale Agency - Commercial $ — $ 1,094 $ — $ 1,094 Agency - Residential — 674 — 674 Municipal obligations — 32 — 32 Corporate debt obligations — 41 — 41 Other MBS — 16 — 16 Loans held-for-sale Residential first mortgage loans — 4,815 — 4,815 Loans held-for-investment Residential first mortgage loans — 8 — 8 Home equity — — 3 3 Mortgage servicing rights — — 313 313 Derivative assets Rate lock commitments (fallout-adjusted) — — 20 20 Mortgage-backed securities forwards — 19 — 19 Interest rate swaps and swaptions — 23 — 23 Total assets at fair value $ — $ 6,722 $ 336 $ 7,058 Derivative liabilities Rate lock commitments (fallout-adjusted) $ — $ — $ (1 ) $ (1 ) Mortgage backed securities forwards — (6 ) — (6 ) Interest rate swaps — (13 ) — (13 ) DOJ litigation settlement — — (60 ) (60 ) Contingent consideration — — (11 ) (11 ) Total liabilities at fair value $ — $ (19 ) $ (72 ) $ (91 ) December 31, 2017 Level 1 Level 2 Level 3 Total Fair Value (Dollars in millions) Investment securities available-for-sale Agency - Commercial $ — $ 987 $ — $ 987 Agency - Residential — 794 — 794 Municipal obligations — 34 — 34 Corporate debt obligations — 38 — 38 Loans held-for-sale Residential first mortgage loans — 4,300 — 4,300 Loans held-for-investment Residential first mortgage loans — 8 — 8 Home equity — — 4 4 Mortgage servicing rights — — 291 291 Derivative assets Rate lock commitments (fallout-adjusted) — — 24 24 Mortgage-backed securities forwards — 4 — 4 Interest rate swaps and swaptions — 11 — 11 Total assets at fair value $ — $ 6,176 $ 319 $ 6,495 Derivative liabilities Interest rate swap on FHLB advances $ — $ (1 ) $ — $ (1 ) Mortgage-backed securities forwards — (6 ) — (6 ) Interest rate swaps — (4 ) — (4 ) DOJ litigation settlement — — (60 ) (60 ) Contingent consideration — — (25 ) (25 ) Total liabilities at fair value $ — $ (11 ) $ (85 ) $ (96 ) There were no transfers between Level 1 and Level 2 during the nine months ended September 30, 2018 .
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	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 Beginning of Period Total Gains (Losses) Recorded in Earnings (1) Purchases / Originations Sales Settlements Transfers In (Out) Balance at End of Period (Dollars in millions) Three Months Ended September 30, 2018 Assets Loans held-for-investment Home equity $ 3 $ — $ — $ — $ — $ — $ 3 Mortgage servicing rights (2) 257 7 100 (51 ) — — 313 Rate lock commitments (net) (2)(3) 32 (5 ) 60 — — (68 ) 19 Totals $ 292 $ 2 $ 160 $ (51 ) $ — $ (68 ) $ 335 Liabilities DOJ litigation settlement $ (60 ) $ — $ — $ — $ — $ — $ (60 ) Contingent consideration (18 ) 3 — — 4 — (11 ) Totals $ (78 ) $ 3 $ — $ — $ 4 $ — $ (71 ) Three Months Ended September 30, 2017 Assets Loans held-for-investment Home equity $ 5 $ — $ — $ — $ (1 ) $ — $ 4 Mortgage servicing rights (2) 184 (9 ) 75 (4 ) — — 246 Rate lock commitments (net) (2)(3) 26 21 82 — — (97 ) 32 Totals $ 215 $ 12 $ 157 $ (4 ) $ (1 ) $ (97 ) $ 282 Liabilities DOJ litigation settlement $ (60 ) $ — $ — $ — $ — $ — $ (60 ) Contingent consideration (23 ) (1 ) (2 ) — — — (26 ) Totals $ (83 ) $ (1 ) $ (2 ) $ — $ — $ — $ (86 ) (1) There were no unrealized gains (losses) recorded in OCI during the three months ended September 30, 2018 and 2017 . (2) 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. (3) 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. Balance at Total Gains (Losses) Recorded in Earnings (1) Purchases / Originations Sales Settlements Transfers In (Out) Balance at (Dollars in millions) Nine Months Ended September 30, 2018 Assets Loans held-for-investment Home equity $ 4 $ — $ — $ — $ (1 ) $ — $ 3 Mortgage servicing rights (2) 291 12 283 (273 ) — — 313 Rate lock commitments (net) (2)(3) 24 (37 ) 191 — — (159 ) 19 Totals $ 319 $ (25 ) $ 474 $ (273 ) $ (1 ) $ (159 ) $ 335 Liabilities DOJ litigation settlement $ (60 ) $ — $ — $ — $ — $ — $ (60 ) Contingent consideration (25 ) 8 — — 6 — (11 ) Totals $ (85 ) $ 8 $ — $ — $ 6 $ — $ (71 ) Nine Months Ended September 30, 2017 Assets Loans held-for-sale Home equity $ — $ 1 $ — $ (52 ) $ (1 ) $ 52 $ — Loans held-for-investment Home equity 65 1 — — (7 ) (55 ) 4 Mortgage servicing rights (2) 335 (7 ) 178 (260 ) — — 246 Rate lock commitments (net) (2)(3) 18 55 199 — — (240 ) 32 Totals $ 418 $ 50 $ 377 $ (312 ) $ (8 ) $ (243 ) $ 282 Liabilities DOJ litigation settlement $ (60 ) $ — $ — $ — $ — $ — $ (60 ) Contingent consideration — (1 ) (25 ) — — — (26 ) Totals $ (60 ) $ (1 ) $ (25 ) $ — $ — $ — $ (86 ) (1) There were no unrealized gains (losses) recorded in OCI during the nine months ended September 30, 2018 and 2017 . (2) 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. (3) 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.
Fair Value Inputs, Assets and Liabilities Measured on Recurring Basis, Quantitative Information	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) September 30, 2018 Assets Loans held-for-investment Home equity $ 3 Discounted cash flows Discount rate 7.2% - 10.8% (9.0%) Mortgage servicing rights $ 313 Discounted cash flows Option adjusted spread 2.1% -25.3% (5.0%) Rate lock commitments (net) $ 19 Consensus pricing Origination pull-through rate 79.8% - 87.2% (81.3%) Liabilities DOJ litigation settlement $ (60 ) Discounted cash flows Discount rate 7.2% - 10.8% (9.0%) Contingent consideration $ (11 ) Discounted cash flows Beta 0.6 - 1.6 (1.1) Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars in millions) December 31, 2017 Assets Loans held-for-investment Home equity $ 4 Discounted cash flows Discount rate 7.2% - 10.8% (9.0%) Mortgage servicing rights $ 291 Discounted cash flows Option adjusted spread 5.0% - 7.5% (6.3%) Rate lock commitments (net) $ 24 Consensus pricing Origination pull-through rate 64.7% - 97.1% (82.0%) Liabilities DOJ litigation settlement $ (60 ) Discounted cash flows Discount rate 7.8% - 11.7% (9.7%) Contingent consideration $ (25 ) Discounted cash flows Beta 0.6 - 1.6 (1.1)
Fair Value Measurements, Nonrecurring	We also have assets that under certain conditions are subject to measurement 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) September 30, 2018 Loans held-for-sale (2) $ 6 $ 6 $ — $ (1 ) Impaired loans held-for-investment (2) Residential first mortgage loans 12 — 12 (5 ) Repossessed assets (3) 7 — 7 (3 ) Totals $ 25 $ 6 $ 19 $ (9 ) December 31, 2017 Loans held-for-sale (2) $ 6 $ 6 $ — $ (1 ) Impaired loans held-for-investment (2) Residential first mortgage loans 21 — 21 (10 ) Repossessed assets (3) 8 — 8 (4 ) Totals $ 35 $ 6 $ 29 $ (15 ) (1) The fair values are determined at various dates during the three months ended September 30, 2018 and the year ended December 31, 2017 , respectively. (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.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques	The following tables present 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) September 30, 2018 Impaired loans held-for-investment Loans held-for-investment $ 12 Fair value of collateral Loss severity discount 25% - 30% (28.3%) Repossessed assets $ 7 Fair value of collateral Loss severity discount 0% - 100% (26.4%) December 31, 2017 Impaired loans held-for-investment Loans held-for-investment $ 21 Fair value of collateral Loss severity discount 25% - 30% (27.9%) Repossessed assets $ 8 Fair value of collateral Loss severity discount 0% - 100% (70.9%)
Fair Value, by Balance Sheet Grouping	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: September 30, 2018 Estimated Fair Value Carrying Value Total Level 1 Level 2 Level 3 (Dollars in millions) Assets Cash and cash equivalents $ 264 $ 264 $ 264 $ — $ — Investment securities available-for-sale 1,857 1,857 — 1,857 — Investment securities held-to-maturity 724 690 — 690 — Loans held-for-sale 4,835 4,836 — 4,836 — Loans held-for-investment 8,966 8,839 — 8 8,831 Loans with government guarantees 305 274 — 274 — Mortgage servicing rights 313 313 — — 313 Federal Home Loan Bank stock 303 303 — 303 — Bank owned life insurance 338 338 — 338 — Repossessed assets 7 7 — — 7 Other assets, foreclosure claims 58 58 — 58 — Derivative financial instruments, assets 62 62 — 42 20 Liabilities Retail deposits Demand deposits and savings accounts $ (5,469 ) $ (4,891 ) $ — $ (4,891 ) $ — Certificates of deposit (2,208 ) (2,199 ) — (2,199 ) — Wholesale deposits (653 ) (651 ) — (651 ) — Government deposits (1,466 ) (1,421 ) — (1,421 ) — Custodial deposits (1,793 ) (1,709 ) — (1,709 ) — Federal Home Loan Bank advances (4,479 ) (4,463 ) — (4,463 ) — Long-term debt (495 ) (459 ) — (459 ) — DOJ litigation settlement (60 ) (60 ) — — (60 ) Contingent consideration (11 ) (11 ) — — (11 ) Derivative financial instruments, liabilities (20 ) (20 ) — (19 ) (1 ) December 31, 2017 Estimated Fair Value Carrying Value Total Level 1 Level 2 Level 3 (Dollars in millions) Assets Cash and cash equivalents $ 204 $ 204 $ 204 $ — $ — Investment securities available-for-sale 1,853 1,853 — 1,853 — Investment securities held-to-maturity 939 924 — 924 — Loans held-for-sale 4,321 4,322 — 4,322 — Loans held-for-investment 7,713 7,667 — 8 7,659 Loans with government guarantees 271 261 — 261 — Mortgage servicing rights 291 291 — — 291 Federal Home Loan Bank stock 303 303 — 303 — Bank owned life insurance 330 330 — 330 — Repossessed assets 8 8 — — 8 Other assets, foreclosure claims 84 84 — 84 — Derivative financial instruments, assets 39 39 — 15 24 Liabilities Retail deposits Demand deposits and savings accounts $ (5,003 ) $ (4,557 ) $ — $ (4,557 ) $ — Certificates of deposit (1,494 ) (1,498 ) — (1,498 ) — Wholesale deposits (43 ) (43 ) — (43 ) — Government deposits (1,073 ) (1,048 ) — (1,048 ) — Custodial deposits (1,321 ) (1,311 ) — (1,311 ) — Federal Home Loan Bank advances (5,665 ) (5,662 ) — (5,662 ) — Long-term debt (494 ) (417 ) — (417 ) — DOJ litigation settlement (60 ) (60 ) — — (60 ) Contingent consideration (25 ) (25 ) — — (25 ) Derivative financial instruments, liabilities (11 ) (11 ) — (11 ) —
Schedule of 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: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in millions) Assets Loans held-for-sale Net gain on loan sales $ 7 $ 92 $ (61 ) $ 260 Loans held-for-investment Other noninterest income $ — $ — $ — $ 1
Fair Value, Option, Quantitative Disclosures	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: September 30, 2018 December 31, 2017 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 $ 7 $ 7 $ — $ 6 $ 5 $ (1 ) Loans held-for-investment 5 4 (1 ) 5 4 (1 ) Total nonaccrual loans $ 12 $ 11 $ (1 ) $ 11 $ 9 $ (2 ) Other performing loans Loans held-for-sale $ 4,692 $ 4,808 $ 116 $ 4,167 $ 4,295 $ 128 Loans held-for-investment 8 7 (1 ) 10 8 (2 ) Total other performing loans $ 4,700 $ 4,815 $ 115 $ 4,177 $ 4,303 $ 126 Total loans Loans held-for-sale $ 4,699 $ 4,815 $ 116 $ 4,173 $ 4,300 $ 127 Loans held-for-investment 13 11 (2 ) 15 12 (3 ) Total loans $ 4,712 $ 4,826 $ 114 $ 4,188 $ 4,312 $ 124 Liabilities Litigation settlement (1) $ (118 ) $ (60 ) $ 58 $ (118 ) $ (60 ) $ 58 (1) We are obligated to pay $118 million in installment payments upon meeting certain performance conditions, as described in Note 16 - Legal Proceedings, Contingencies and Commitments.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following tables present financial information by business segment for the periods indicated: Three Months Ended September 30, 2018 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 81 $ 36 $ 2 $ 5 $ 124 Net gain (loss) on loan sales (3 ) 46 — — 43 Other noninterest income 10 30 24 — 64 Total net interest income and noninterest income 88 112 26 5 231 (Provision) benefit for loan losses (1 ) — — 3 2 Compensation and benefits (17 ) (26 ) (4 ) (29 ) (76 ) Other noninterest expense and directly allocated overhead (27 ) (41 ) (18 ) (11 ) (97 ) Total noninterest expense (44 ) (67 ) (22 ) (40 ) (173 ) Income (loss) before indirect overhead allocations and income taxes 43 45 4 (32 ) 60 Provision (benefit) for income taxes 7 6 — (1 ) 12 Overhead allocations (9 ) (16 ) (5 ) 30 — Net income (loss) $ 27 $ 23 $ (1 ) $ (1 ) $ 48 Intersegment (expense) revenue $ 1 $ 4 $ 5 $ (10 ) $ — Average balances Loans held-for-sale $ 10 $ 4,383 $ — $ — $ 4,393 Loans with government guarantees — 292 — — 292 Loans held-for-investment (2) 8,868 11 — 29 8,908 Total assets 9,028 5,676 29 3,878 18,611 Deposits 9,170 — 2,072 94 11,336 (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. Three Months Ended September 30, 2017 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 63 $ 34 $ 4 $ 2 $ 103 Net gain (loss) on loan sales (4 ) 79 — — 75 Other noninterest income 8 27 14 6 55 Total net interest income and noninterest income 67 140 18 8 233 (Provision) benefit for loan losses (1 ) (1 ) — — (2 ) Compensation and benefits (15 ) (28 ) (4 ) (29 ) (76 ) Other noninterest expense and directly allocated overhead (25 ) (49 ) (13 ) (8 ) (95 ) Total noninterest expense (40 ) (77 ) (17 ) (37 ) (171 ) Income (loss) before indirect overhead allocations and income taxes 26 62 1 (29 ) 60 Provision (benefit) for income taxes 6 16 (1 ) (1 ) 20 Overhead allocations (10 ) (15 ) (6 ) 31 — Net income (loss) $ 10 $ 31 $ (4 ) $ 3 $ 40 Intersegment (expense) revenue $ (4 ) $ 2 $ 5 $ (3 ) $ — Average balances Loans held-for-sale $ 14 $ 4,462 $ — $ — $ 4,476 Loans with government guarantees — 264 — — 264 Loans held-for-investment (2) 6,789 10 — 29 6,828 Total assets 6,843 5,743 30 3,823 16,439 Deposits 7,498 — 1,507 — 9,005 (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. Nine Months Ended September 30, 2018 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 231 $ 100 $ 5 $ 9 $ 345 Net gain (loss) on loan sales (10 ) 176 — — 166 Other noninterest income 27 76 65 7 175 Total net interest income and noninterest income 248 352 70 16 686 (Provision) benefit for loan losses (2 ) (1 ) — 6 3 Compensation and benefits (51 ) (83 ) (13 ) (89 ) (236 ) Other noninterest expense and directly allocated overhead (81 ) (129 ) (49 ) (28 ) (287 ) Total noninterest expense (132 ) (212 ) (62 ) (117 ) (523 ) Income (loss) before indirect overhead allocations and income taxes 114 139 8 (95 ) 166 Provision (benefit) for income taxes 18 18 (2 ) (1 ) 33 Overhead allocations (29 ) (51 ) (15 ) 95 — Net income (loss) $ 67 $ 70 $ (5 ) $ 1 $ 133 Intersegment (expense) revenue $ (1 ) $ 6 $ 14 $ (19 ) $ — Average balances Loans held-for-sale $ 11 $ 4,254 $ — $ — $ 4,265 Loans with government guarantees — 288 — — 288 Loans held-for-investment (2) 8,250 9 — 29 8,288 Total assets 8,425 5,477 30 3,902 17,834 Deposits 8,581 — 1,800 — 10,381 (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. Nine Months Ended September 30, 2017 Community Banking Mortgage Originations Mortgage Servicing Other (1) Total (Dollars in millions) Summary of Operations Net interest income $ 171 $ 96 $ 9 $ 7 $ 283 Net gain (loss) on loan sales (7 ) 196 — — 189 Other noninterest income 22 77 47 11 157 Total net interest income and noninterest income 186 369 56 18 629 (Provision) benefit for loan losses (3 ) (3 ) — 2 (4 ) Compensation and benefits (46 ) (72 ) (12 ) (89 ) (219 ) Other noninterest expense and directly allocated overhead (67 ) (114 ) (45 ) (20 ) (246 ) Total noninterest expense (113 ) (186 ) (57 ) (109 ) (465 ) Income (loss) before indirect overhead allocations and income taxes 70 180 (1 ) (89 ) 160 Provision (benefit) for income taxes 14 47 (6 ) (3 ) 52 Overhead allocations (30 ) (46 ) (17 ) 93 — Net income (loss) $ 26 $ 87 $ (12 ) $ 7 $ 108 Intersegment (expense) revenue $ (5 ) $ 3 $ 14 $ (12 ) $ — Average balances Loans held-for-sale $ 16 $ 3,998 $ — $ — $ 4,014 Loans with government guarantees — 300 — — 300 Loans held-for-investment (2) 6,201 7 — 29 6,237 Total assets 6,262 5,307 36 3,801 15,406 Deposits 7,438 — 1,409 — 8,847 (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.

Recently Issued Accounting Pr_3

Recently Issued Accounting Pronouncements (Tables)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	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: Standard Description Effective Date 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 2018-11 Leases (Topic 842): Targeted Improvements January 1, 2019 ASU 2018-10 Codification Improvements to Topic 842, Leases January 1, 2019 ASU 2018-07 Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting January 1, 2019 ASU 2017-11 Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Non-controlling Interests with a Scope. January 1, 2019 ASU 2017-08 Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities January 1, 2019 ASU 2017-06 Plan Accounting - Defined Benefit Pension Plans (Topic 960), Defined Contribution Pension Plans (Topic 962), Health and Welfare Benefit Plans (Topic 965): Employee Benefit Plan Master Trust Reporting January 1, 2019 ASU 2017-04 Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment January 1, 2020 We adopted the following accounting standard updates (ASU) during 2018 , none of which had a material impact to our financial statements: Standard Description Effective Date ASU 2018-03 Technical Corrections and Improvements to Financial Instruments—Overall (Subtopic 825-10) - Update to 2016-01 January 1, 2018 ASU 2018-02 Income Statement-Reporting Comprehensive Income (Topic 220); Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income January 1, 2019 ASU 2017-09 Update 2017-09—Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting January 1, 2018 ASU 2017-05 Other Income - Gains and Losses from the De-recognition of Non-financial Assets (Subtopic 610-20): Clarifying the Scope of Asset De-recognition Guidance and Accounting for Partial Sales of Non-financial Assets January 1, 2018 ASU 2017-01 Business Combinations (Topic 805): Clarifying the Definition of a Business January 1, 2018 ASU 2016-18 Statement of Cash Flows (Topic 230): Restricted Cash January 1, 2018 ASU 2016-16 Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory January 1, 2018 ASU 2016-15 Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments January 1, 2018 ASU 2016-01 Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities January 1, 2018
Revenue	The disaggregation of our revenue from contracts with customers is provided below. Three Months Ended September 30, Nine Months Ended September 30, Location of Revenue (1) 2018 2017 2018 2017 (Dollars in millions) Deposit account and other banking income Deposit fees and charges $ 4 $ 4 $ 12 $ 11 Interchange fees Deposit fees and charges 1 1 3 3 Interchange fees Other noninterest income — 1 1 1 Wealth management Other noninterest income 3 2 7 5 Total $ 8 $ 8 $ 23 $ 20 (1) Recognized within the Community Banking segment.

Basis of Presentation (Narrativ

Basis of Presentation (Narratives) (Details) $ in Millions	Jun. 04, 2018USD ($)branch	Mar. 19, 2018USD ($)branch	Mar. 12, 2018USD ($)
Wells Fargo
Business Acquisition
Number of bank branches | branch	52
Deposits	$ 2,000
Loans assumed	$ 100
Santandar Bank
Business Acquisition
Outstanding loan receivable acquired			$ 499
Commitments assumed			$ 1,700
Desert Community Bank
Business Acquisition
Number of bank branches | branch		8
Deposits		$ 614
Outstanding loan receivable acquired		59
Intangible assets and goodwill acquired		$ 51

Investment Securities (Details)

Investment Securities (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Investment securities
Amortized Cost	$ 1,945,000,000		$ 1,945,000,000		$ 1,887,000,000
Gross Unrealized Gains	0		0		1,000,000
Gross Unrealized Losses	(88,000,000)		(88,000,000)		(35,000,000)
Fair Value	1,857,000,000		1,857,000,000		1,853,000,000
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	724,000,000		724,000,000		939,000,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(34,000,000)		(34,000,000)		(15,000,000)
Fair Value	690,000,000		690,000,000		924,000,000
Other than temporary impairments	0	$ 0	0	$ 0
Agency - Commercial
Investment securities
Amortized Cost	1,142,000,000		1,142,000,000		1,004,000,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(48,000,000)		(48,000,000)		(17,000,000)
Fair Value	1,094,000,000		1,094,000,000		987,000,000
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	357,000,000		357,000,000		526,000,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(17,000,000)		(17,000,000)		(9,000,000)
Fair Value	340,000,000		340,000,000		517,000,000
Agency - Residential
Investment securities
Amortized Cost	713,000,000		713,000,000		811,000,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(39,000,000)		(39,000,000)		(17,000,000)
Fair Value	674,000,000		674,000,000		794,000,000
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	367,000,000		367,000,000		413,000,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(17,000,000)		(17,000,000)		(6,000,000)
Fair Value	350,000,000		350,000,000		407,000,000
Municipal obligations
Investment securities
Amortized Cost	33,000,000		33,000,000		35,000,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(1,000,000)		(1,000,000)		(1,000,000)
Fair Value	32,000,000		32,000,000		34,000,000
Corporate debt obligations
Investment securities
Amortized Cost	41,000,000		41,000,000		37,000,000
Gross Unrealized Gains	0		0		1,000,000
Gross Unrealized Losses	0		0		0
Fair Value	41,000,000		41,000,000		$ 38,000,000
Other MBS
Investment securities
Amortized Cost	16,000,000		16,000,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	0		0
Fair Value	$ 16,000,000		$ 16,000,000
Federal government
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Percentage of total investment	97.00%		97.00%

Investment Securities (Availabl

Investment Securities (Available-for-sale and Held-to-maturity Securities, Unrealized Losses) (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2018USD ($)security	Mar. 31, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)security	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)security
Debt Securities, Available-for-sale [Line Items]
Purchase of investment securities AFS				$ 48,000,000	$ 593,000,000
Sales of AFS securities	$ 0		$ 227,000,000	0	289,000,000
Gain from sale of AFS securities			2,000,000		3,000,000
Transfer of held to maturity securities		$ 144,000,000
Purchase of investment securities HTM	0		0	0	0
Collateral Pledged
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities pledged as collateral	2,000,000,000			2,000,000,000		$ 2,000,000,000
Corporate debt obligations
Debt Securities, Available-for-sale [Line Items]
Purchase of investment securities AFS	43,000,000			48,000,000
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value	$ 0			$ 0		$ 0
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Securities | security	0			0		0
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Unrealized Loss	$ 0			$ 0		$ 0
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value	$ 13,000,000			$ 13,000,000		$ 3,000,000
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss | security	4			4		1
Available-for-sale Debt Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0			$ 0		$ 0
Other MBS
Debt Securities, Available-for-sale [Line Items]
Interest income	0			16,000,000
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value	$ 0			$ 0
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Securities | security	0			0
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Unrealized Loss	$ 0			$ 0
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value	$ 14,000,000			$ 14,000,000
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss | security	1			1
Available-for-sale Debt Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0			$ 0
US Government-sponsored Enterprises Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Purchase of investment securities AFS			$ 300,000,000		$ 600,000,000
Agency - Commercial
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value	$ 819,000,000			$ 819,000,000		$ 218,000,000
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Securities | security	54			54		20
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Unrealized Loss	$ (41,000,000)			$ (41,000,000)		$ (7,000,000)
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value	$ 274,000,000			$ 274,000,000		$ 744,000,000
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss | security	23			23		41
Available-for-sale Debt Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (7,000,000)			$ (7,000,000)		$ (11,000,000)
Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value	$ 330,000,000			$ 330,000,000		$ 348,000,000
Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Positions | security	25			25		25
Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months or Over, Unrealized Loss	$ (17,000,000)			$ (17,000,000)		$ (8,000,000)
Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value	$ 10,000,000			$ 10,000,000		$ 99,000,000
Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Number of Positions | security	1			1		8
Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss	$ 0			$ 0		$ (1,000,000)
Agency - Residential
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value	$ 535,000,000			$ 535,000,000		$ 452,000,000
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Securities | security	57			57		36
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Unrealized Loss	$ (34,000,000)			$ (34,000,000)		$ (14,000,000)
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value	$ 139,000,000			$ 139,000,000		$ 263,000,000
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss | security	27			27		33
Available-for-sale Debt Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (5,000,000)			$ (5,000,000)		$ (3,000,000)
Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value	$ 292,000,000			$ 292,000,000		$ 111,000,000
Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Positions | security	46			46		16
Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months or Over, Unrealized Loss	$ (15,000,000)			$ (15,000,000)		$ (3,000,000)
Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value	$ 58,000,000			$ 58,000,000		$ 293,000,000
Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Number of Positions | security	14			14		43
Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss	$ (2,000,000)			$ (2,000,000)		$ (3,000,000)
Municipal obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value	$ 25,000,000			$ 25,000,000		$ 6,000,000
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Securities | security	11			11		3
Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Unrealized Loss	$ (1,000,000)			$ (1,000,000)		$ 0
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value	$ 6,000,000			$ 6,000,000		$ 22,000,000
Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss | security	10			10		9
Available-for-sale Debt Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0			$ 0		$ 0

Investment Securities (Contract

Investment Securities (Contractual Maturity) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Investment Securities Available-for-Sale, Amortized Cost
Due after one year through five years, amortized cost	$ 60
Due after five years through 10 years, amortized cost	60
Due after 10 years, amortized cost	1,825
Amortized Cost	1,945	$ 1,887
Investment Securities Available-for-Sale, Estimated Fair Value
Due after one year through five years, fair value	58
Due after five years through 10 years, fair value	59
Due after 10 years, fair value	1,740
Fair Value	$ 1,857	$ 1,853
Investment Securities Available-for-Sale, Weighted-Average Yield
Due after one year through five years, weighted average yield (as a percent)	2.51%
Due after five years through 10 years, weighted average yield (as a percent)	4.40%
Due after 10 years, weighted average yield (as a percent)	2.43%
Investment Securities Held-to-maturity, Amortized cost
Due after one year through five years, amortized cost	$ 10
Due after five years through 10 years, amortized cost	11
Due after 10 years, amortized cost	703
Amortized Cost	724
Investment Securities Held-to-maturity, Estimated Fair Value
Due after one year through five years, fair value	10
Due after five years through 10 years, fair value	11
Due after 10 years, fair value	669
Fair Value	$ 690
Investment Securities Held-to-maturity, Weighted-Average Yield
Due after one year through five years, weighted average yield (as a percent)	2.45%
Due after five years through 10 years, weighted average yield (as a percent)	2.21%
Due after 10 years, weighted average yield (as a percent)	2.46%

Loans Held-for-Sale (Details)

Loans Held-for-Sale (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Receivables Held-for-sale [Abstract]
Loans held-for-sale	$ 4,835		$ 4,835		$ 4,321
Net gain (loss) on loan sales	43	$ 75	166	$ 189
Loans held-for-sale, other	$ 20		$ 20		$ 21

Loans Held-for-Investment (Deta

Loans Held-for-Investment (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable, Net Amount [Abstract]
Total loans held-for-investment	$ 8,966	$ 7,713
Residential first mortgage loans
Loans and Leases Receivable, Net Amount [Abstract]
Total loans held-for-investment	3,085	2,754
Home equity
Loans and Leases Receivable, Net Amount [Abstract]
Total loans held-for-investment	704	664
Other
Loans and Leases Receivable, Net Amount [Abstract]
Total loans held-for-investment	150	25
Consumer loans
Loans and Leases Receivable, Net Amount [Abstract]
Total loans held-for-investment	3,939	3,443
Commercial real estate
Loans and Leases Receivable, Net Amount [Abstract]
Total loans held-for-investment	2,160	1,932
Commercial and industrial
Loans and Leases Receivable, Net Amount [Abstract]
Total loans held-for-investment	1,317	1,196
Warehouse lending
Loans and Leases Receivable, Net Amount [Abstract]
Total loans held-for-investment	1,550	1,142
Commercial loans
Loans and Leases Receivable, Net Amount [Abstract]
Total loans held-for-investment	$ 5,027	$ 4,270

Loans Held-for-Investment (UPB

Loans Held-for-Investment (UPB Loan Sales and Purchases) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable
Loans purchased	$ 0	$ 106
Premium associated with loans purchased	0	4
Residential first mortgage loans
Accounts, Notes, Loans and Financing Receivable
Loans sold	4	103
Net gain on loans sold	0	1
Loans purchased	0	6
Residential first mortgage loans | Performing
Accounts, Notes, Loans and Financing Receivable
Loans sold	4	78
Residential first mortgage loans | Nonperforming
Accounts, Notes, Loans and Financing Receivable
Loans sold	0	25
Net gain on loans sold		1
HELOC commitments
Accounts, Notes, Loans and Financing Receivable
Loans purchased	$ 0	$ 100

Loans Held-for-Investment (Narr

Loans Held-for-Investment (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Loans pledged as collateral	$ 7,700	$ 7,100
Loans greater than 90 days past due accounted for under the fair value option	$ 4	$ 4

Loans Held-for-Investment (Allo

Loans Held-for-Investment (Allowance for Loan Losses Rollforward) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Allowance for Loan Losses [Roll Forward]
Beginning balance ALLL	$ 137	$ 140	$ 140	$ 142
Charge-offs	(2)	(3)	(6)	(10)
Recoveries	1	1	3	4
Provision (benefit)	(2)	2	(3)	4
Ending balance ALLL	134	140	134	140
Residential first mortgage
Allowance for Loan Losses [Roll Forward]
Beginning balance ALLL	45	56	47	65
Charge-offs	(2)	(1)	(3)	(6)
Recoveries	1	0	1	1
Provision (benefit)	(4)	(3)	(5)	(8)
Ending balance ALLL	40	52	40	52
Home equity
Allowance for Loan Losses [Roll Forward]
Beginning balance ALLL	19	19	22	24
Charge-offs	0	(2)	(2)	(3)
Recoveries	0	1	2	2
Provision (benefit)	1	2	(2)	(3)
Ending balance ALLL	20	20	20	20
Other Consumer
Allowance for Loan Losses [Roll Forward]
Beginning balance ALLL	1	1	1	1
Charge-offs	0	0	(1)	(1)
Recoveries	0	0	0	1
Provision (benefit)	1	0	2	0
Ending balance ALLL	2	1	2	1
Commercial real estate
Allowance for Loan Losses [Roll Forward]
Beginning balance ALLL	45	37	45	28
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (benefit)	1	5	1	14
Ending balance ALLL	46	42	46	42
Commercial and industrial
Allowance for Loan Losses [Roll Forward]
Beginning balance ALLL	21	21	19	17
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (benefit)	(1)	(2)	1	2
Ending balance ALLL	20	19	20	19
Warehouse lending
Allowance for Loan Losses [Roll Forward]
Beginning balance ALLL	6	6	6	7
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (benefit)	0	0	0	(1)
Ending balance ALLL	$ 6	$ 6	$ 6	$ 6

Loans Held-for-Investment (Al_2

Loans Held-for-Investment (Allowance Additional Disclosure) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Allowance for Loan Losses [Line Items]
Individually evaluated	$ 57		$ 61
Collectively evaluated	8,898		7,640
Total loans	8,955		7,701
Individually evaluated	13		16
Collectively evaluated	121		124
Total allowance for loan losses	134	$ 137	140	$ 140	$ 140	$ 142
Residential first mortgage
Allowance for Loan Losses [Line Items]
Individually evaluated	33		34
Collectively evaluated	3,044		2,712
Total loans	3,077		2,746
Individually evaluated	5		6
Collectively evaluated	35		41
Total allowance for loan losses	40	45	47	52	56	65
Home equity
Allowance for Loan Losses [Line Items]
Individually evaluated	24		27
Collectively evaluated	677		633
Total loans	701		660
Individually evaluated	8		10
Collectively evaluated	12		12
Total allowance for loan losses	20	19	22	20	19	24
Other Consumer
Allowance for Loan Losses [Line Items]
Individually evaluated	0		0
Collectively evaluated	150		25
Total loans	150		25
Individually evaluated	0		0
Collectively evaluated	2		1
Total allowance for loan losses	2	1	1	1	1	1
Commercial real estate
Allowance for Loan Losses [Line Items]
Individually evaluated	0		0
Collectively evaluated	2,160		1,932
Total loans	2,160		1,932
Individually evaluated	0		0
Collectively evaluated	46		45
Total allowance for loan losses	46	45	45	42	37	28
Commercial and industrial
Allowance for Loan Losses [Line Items]
Individually evaluated	0		0
Collectively evaluated	1,317		1,196
Total loans	1,317		1,196
Individually evaluated	0		0
Collectively evaluated	20		19
Total allowance for loan losses	20	21	19	19	21	17
Warehouse lending
Allowance for Loan Losses [Line Items]
Individually evaluated	0		0
Collectively evaluated	1,550		1,142
Total loans	1,550		1,142
Individually evaluated	0		0
Collectively evaluated	6		6
Total allowance for loan losses	$ 6	$ 6	$ 6	$ 6	$ 6	$ 7

Loans Held-for-Investment (Past

Loans Held-for-Investment (Past Due Loans) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Loans, Aging [Abstract]
Total Past Due	$ 28,000,000		$ 28,000,000		$ 34,000,000
Current	8,938,000,000		8,938,000,000		7,679,000,000
Total LHFI	8,966,000,000		8,966,000,000		7,713,000,000
Loans greater than 90 days past due accounted for under the fair value option	4,000,000		4,000,000		4,000,000
Accrued interest on nonaccrual loans	1,000,000	$ 0	1,000,000	$ 1,000,000
90 Days and Still Accruing	0		0		0
Residential first mortgage
Loans, Aging [Abstract]
Total Past Due	22,000,000		22,000,000		27,000,000
Current	3,063,000,000		3,063,000,000		2,727,000,000
Total LHFI	3,085,000,000		3,085,000,000		2,754,000,000
Home equity
Loans, Aging [Abstract]
Total Past Due	6,000,000		6,000,000		7,000,000
Current	698,000,000		698,000,000		657,000,000
Total LHFI	704,000,000		704,000,000		664,000,000
Other
Loans, Aging [Abstract]
Total Past Due	0		0		0
Current	150,000,000		150,000,000		25,000,000
Total LHFI	150,000,000		150,000,000		25,000,000
Consumer loans
Loans, Aging [Abstract]
Total Past Due	28,000,000		28,000,000		34,000,000
Current	3,911,000,000		3,911,000,000		3,409,000,000
Total LHFI	3,939,000,000		3,939,000,000		3,443,000,000
Commercial real estate
Loans, Aging [Abstract]
Total Past Due	0		0		0
Current	2,160,000,000		2,160,000,000		1,932,000,000
Total LHFI	2,160,000,000		2,160,000,000		1,932,000,000
Commercial and industrial
Loans, Aging [Abstract]
Total Past Due	0		0		0
Current	1,317,000,000		1,317,000,000		1,196,000,000
Total LHFI	1,317,000,000		1,317,000,000		1,196,000,000
Warehouse lending
Loans, Aging [Abstract]
Total Past Due	0		0		0
Current	1,550,000,000		1,550,000,000		1,142,000,000
Total LHFI	1,550,000,000		1,550,000,000		1,142,000,000
Commercial loans
Loans, Aging [Abstract]
Total Past Due	0		0		0
Current	5,027,000,000		5,027,000,000		4,270,000,000
Total LHFI	5,027,000,000		5,027,000,000		4,270,000,000
30-59 Days Past Due
Loans, Aging [Abstract]
Total Past Due	2,000,000		2,000,000		3,000,000
30-59 Days Past Due | Residential first mortgage
Loans, Aging [Abstract]
Total Past Due	1,000,000		1,000,000		2,000,000
30-59 Days Past Due | Home equity
Loans, Aging [Abstract]
Total Past Due	1,000,000		1,000,000		1,000,000
30-59 Days Past Due | Other
Loans, Aging [Abstract]
Total Past Due	0		0		0
30-59 Days Past Due | Consumer loans
Loans, Aging [Abstract]
Total Past Due	2,000,000		2,000,000		3,000,000
30-59 Days Past Due | Commercial real estate
Loans, Aging [Abstract]
Total Past Due	0		0		0
30-59 Days Past Due | Commercial and industrial
Loans, Aging [Abstract]
Total Past Due	0		0		0
30-59 Days Past Due | Warehouse lending
Loans, Aging [Abstract]
Total Past Due	0		0		0
30-59 Days Past Due | Commercial loans
Loans, Aging [Abstract]
Total Past Due	0		0		0
60-89 Days Past Due
Loans, Aging [Abstract]
Total Past Due	1,000,000		1,000,000		2,000,000
60-89 Days Past Due | Residential first mortgage
Loans, Aging [Abstract]
Total Past Due	1,000,000		1,000,000		2,000,000
60-89 Days Past Due | Home equity
Loans, Aging [Abstract]
Total Past Due	0		0		0
60-89 Days Past Due | Other
Loans, Aging [Abstract]
Total Past Due	0		0		0
60-89 Days Past Due | Consumer loans
Loans, Aging [Abstract]
Total Past Due	1,000,000		1,000,000		2,000,000
60-89 Days Past Due | Commercial real estate
Loans, Aging [Abstract]
Total Past Due	0		0		0
60-89 Days Past Due | Commercial and industrial
Loans, Aging [Abstract]
Total Past Due	0		0		0
60-89 Days Past Due | Warehouse lending
Loans, Aging [Abstract]
Total Past Due	0		0		0
60-89 Days Past Due | Commercial loans
Loans, Aging [Abstract]
Total Past Due	0		0		0
90 Days or Greater Past Due
Loans, Aging [Abstract]
Total Past Due	25,000,000		25,000,000		29,000,000
90 Days or Greater Past Due | Residential first mortgage
Loans, Aging [Abstract]
Total Past Due	20,000,000		20,000,000		23,000,000
90 Days or Greater Past Due | Home equity
Loans, Aging [Abstract]
Total Past Due	5,000,000		5,000,000		6,000,000
90 Days or Greater Past Due | Other
Loans, Aging [Abstract]
Total Past Due	0		0		0
90 Days or Greater Past Due | Consumer loans
Loans, Aging [Abstract]
Total Past Due	25,000,000		25,000,000		29,000,000
90 Days or Greater Past Due | Commercial real estate
Loans, Aging [Abstract]
Total Past Due	0		0		0
90 Days or Greater Past Due | Commercial and industrial
Loans, Aging [Abstract]
Total Past Due	0		0		0
90 Days or Greater Past Due | Warehouse lending
Loans, Aging [Abstract]
Total Past Due	0		0		0
90 Days or Greater Past Due | Commercial loans
Loans, Aging [Abstract]
Total Past Due	$ 0		$ 0		$ 0

Loans Held-for-Investment (Trou

Loans Held-for-Investment (Troubled Debt Restructurings) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Troubled Debt Restructurings
TDR Balance	$ 56	$ 59
Allowance for loan losses on TDR loans	11	13
TDR loans under fair value option	3	3
Consumer loans | Residential first mortgage
Troubled Debt Restructurings
TDR Balance	31	31
Consumer loans | Home equity
Troubled Debt Restructurings
TDR Balance	25	28
Performing
Troubled Debt Restructurings
TDR Balance	43	43
Performing | Consumer loans | Residential first mortgage
Troubled Debt Restructurings
TDR Balance	22	19
Performing | Consumer loans | Home equity
Troubled Debt Restructurings
TDR Balance	21	24
Nonperforming
Troubled Debt Restructurings
TDR Balance	13	16
Nonperforming | Consumer loans | Residential first mortgage
Troubled Debt Restructurings
TDR Balance	9	12
Nonperforming | Consumer loans | Home equity
Troubled Debt Restructurings
TDR Balance	$ 4	$ 4

Loans Held-for-Investment (Tr_2

Loans Held-for-Investment (Troubled Debt Restructuring, New ) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)loan	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)loan
Troubled Debt Restructurings
Number of Accounts | loan	8	46	27	89
Pre-Modification Unpaid Principal Balance	$ 1,000,000	$ 5,000,000	$ 3,000,000	$ 9,000,000
Post-Modification Unpaid Principal Balance	1,000,000	5,000,000	3,000,000	9,000,000
Increase in Allowance at Modification	$ 0	$ 1,000,000	0	$ 2,000,000
Modifications subsequent to default			$ 0
Residential first mortgage
Troubled Debt Restructurings
Number of Accounts | loan	2	9	13	17
Pre-Modification Unpaid Principal Balance	$ 0	$ 3,000,000	$ 2,000,000	$ 4,000,000
Post-Modification Unpaid Principal Balance	0	3,000,000	2,000,000	4,000,000
Increase in Allowance at Modification	$ 0	0	$ 0	$ 0
Number of loans modified in previous 12 months that have defaulted | loan			0	1
Modifications subsequent to default		$ 1,000,000		$ 1,000,000
Home equity
Troubled Debt Restructurings
Number of Accounts | loan	6	37	14	71
Pre-Modification Unpaid Principal Balance	$ 1,000,000	$ 2,000,000	$ 1,000,000	$ 5,000,000
Post-Modification Unpaid Principal Balance	1,000,000	2,000,000	1,000,000	5,000,000
Increase in Allowance at Modification	$ 0	$ 1,000,000	$ 0	$ 2,000,000
Other Consumer
Troubled Debt Restructurings
Number of Accounts | loan				1
Pre-Modification Unpaid Principal Balance				$ 0
Post-Modification Unpaid Principal Balance				0
Increase in Allowance at Modification				$ 0

Loans Held-for-Investment (Impa

Loans Held-for-Investment (Impaired Loans) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Impaired Loans
With no related allowance recorded, recorded investment	$ 14		$ 14		$ 11
With no related allowance recorded, unpaid principal balance	20		20		12
With an allowance recorded, recorded investment	43		43		46
With an allowance recorded, unpaid principal balance	45		45		49
With an allowance recorded, related allowance	13		13		16
Total recorded investment	57		57		57
Total unpaid principal balance	65		65		61
Average Recorded Investment	58	$ 66	61	$ 67
Interest Income Recognized	1	1	2	2
Residential first mortgage
Impaired Loans
With no related allowance recorded, recorded investment	13		13		11
With no related allowance recorded, unpaid principal balance	16		16		12
With an allowance recorded, recorded investment	20		20		22
With an allowance recorded, unpaid principal balance	21		21		22
With an allowance recorded, related allowance	5		5		6
Total recorded investment	33		33		33
Total unpaid principal balance	37		37		34
Average Recorded Investment	34	37	34	39
Interest Income Recognized	1	1	1	1
Home equity
Impaired Loans
With no related allowance recorded, recorded investment	1		1		0
With no related allowance recorded, unpaid principal balance	4		4		0
With an allowance recorded, recorded investment	23		23		24
With an allowance recorded, unpaid principal balance	24		24		27
With an allowance recorded, related allowance	8		8		10
Total recorded investment	24		24		24
Total unpaid principal balance	28		28		$ 27
Average Recorded Investment	24	28	25	28
Interest Income Recognized	0	0	1	1
Commercial real estate
Impaired Loans
Average Recorded Investment	0	1	0	0
Interest Income Recognized	0	0	0	0
Commercial and industrial
Impaired Loans
Average Recorded Investment	0	0	2	0
Interest Income Recognized	$ 0	$ 0	$ 0	$ 0

Loans Held-for-Investment (Cred

Loans Held-for-Investment (Credit Quality Indicators) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Loans held-for-investment
Loans held-for-investment	$ 8,955	$ 7,701
Total loans	8,966	7,713
Consumer loans
Loans held-for-investment
Total loans	3,939	3,443
Residential first mortgage
Loans held-for-investment
Loans held-for-investment	3,077	2,746
Total loans	3,085	2,754
Home equity
Loans held-for-investment
Loans held-for-investment	701	660
Total loans	704	664
Other Consumer
Loans held-for-investment
Loans held-for-investment	150	25
Total loans	150	25
Commercial loans
Loans held-for-investment
Total loans	5,027	4,270
Commercial real estate
Loans held-for-investment
Loans held-for-investment	2,160	1,932
Total loans	2,160	1,932
Commercial and industrial
Loans held-for-investment
Loans held-for-investment	1,317	1,196
Total loans	1,317	1,196
Warehouse lending
Loans held-for-investment
Loans held-for-investment	1,550	1,142
Total loans	1,550	1,142
Pass | Consumer loans
Loans held-for-investment
Loans held-for-investment	3,865	3,364
Pass | Residential first mortgage
Loans held-for-investment
Loans held-for-investment	3,037	2,706
Pass | Home equity
Loans held-for-investment
Loans held-for-investment	678	633
Pass | Other Consumer
Loans held-for-investment
Loans held-for-investment	150	25
Pass | Commercial loans
Loans held-for-investment
Loans held-for-investment	4,808	4,051
Pass | Commercial real estate
Loans held-for-investment
Loans held-for-investment	2,135	1,902
Pass | Commercial and industrial
Loans held-for-investment
Loans held-for-investment	1,228	1,135
Pass | Warehouse lending
Loans held-for-investment
Loans held-for-investment	1,445	1,014
Watch | Consumer loans
Loans held-for-investment
Loans held-for-investment	48	48
Watch | Residential first mortgage
Loans held-for-investment
Loans held-for-investment	27	23
Watch | Home equity
Loans held-for-investment
Loans held-for-investment	21	25
Watch | Other Consumer
Loans held-for-investment
Loans held-for-investment	0	0
Watch | Commercial loans
Loans held-for-investment
Loans held-for-investment	165	183
Watch | Commercial real estate
Loans held-for-investment
Loans held-for-investment	23	23
Watch | Commercial and industrial
Loans held-for-investment
Loans held-for-investment	52	32
Watch | Warehouse lending
Loans held-for-investment
Loans held-for-investment	90	128
Special Mention | Consumer loans
Loans held-for-investment
Loans held-for-investment	0	0
Special Mention | Residential first mortgage
Loans held-for-investment
Loans held-for-investment	0	0
Special Mention | Home equity
Loans held-for-investment
Loans held-for-investment	0	0
Special Mention | Other Consumer
Loans held-for-investment
Loans held-for-investment	0	0
Special Mention | Commercial loans
Loans held-for-investment
Loans held-for-investment	52	31
Special Mention | Commercial real estate
Loans held-for-investment
Loans held-for-investment	0	7
Special Mention | Commercial and industrial
Loans held-for-investment
Loans held-for-investment	37	24
Special Mention | Warehouse lending
Loans held-for-investment
Loans held-for-investment	15	0
Substandard | Consumer loans
Loans held-for-investment
Loans held-for-investment	26	31
Substandard | Residential first mortgage
Loans held-for-investment
Loans held-for-investment	21	25
Substandard | Home equity
Loans held-for-investment
Loans held-for-investment	5	6
Substandard | Other Consumer
Loans held-for-investment
Loans held-for-investment	0	0
Substandard | Commercial loans
Loans held-for-investment
Loans held-for-investment	2	5
Substandard | Commercial real estate
Loans held-for-investment
Loans held-for-investment	2	0
Substandard | Commercial and industrial
Loans held-for-investment
Loans held-for-investment	0	5
Substandard | Warehouse lending
Loans held-for-investment
Loans held-for-investment	$ 0	$ 0

Loans with Government Guarant_2

Loans with Government Guarantees (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Abstract]
Debt instrument, term (in years)	10 years
Loans with government guarantees	$ 305	$ 271
Repossessed assets and associated claims	$ 58	$ 84

Variable Interest Entities (Det

Variable Interest Entities (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018USD ($)loanentity	Dec. 31, 2017USD ($)loanentity
Private-label Securitizations
Number of VIEs | entity	0	0
Agency - Commercial
Private-label Securitizations
Ownership interest investment	5.00%
FSTAR 2007-1 Mortgage Securitization
Private-label Securitizations
Number of mortgage securitization trust loans | loan	1,598	1,911
Aggregate principal balance | $	$ 53	$ 65

Mortgage Servicing Rights (Deta

Mortgage Servicing Rights (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Servicing Asset at Fair Value [Roll Forward]
Balance at beginning of period			$ 291
Changes in fair value due to
Fair value of MSRs at end of period	$ 313		313
Residential first mortgage loans
Servicing Asset at Fair Value [Roll Forward]
Balance at beginning of period	257	$ 184	291	$ 335
Additions from loans sold with servicing retained	100	75	283	178
Reductions from sales	(51)	(4)	(273)	(260)
Changes in fair value due to
Decrease in MSR value due to pay-offs, pay-downs and run-off	(3)	(5)	(11)	(15)
Changes in estimates of fair value	10	(4)	23	8
Fair value of MSRs at end of period	$ 313	$ 246	$ 313	$ 246

Mortgage Servicing Rights (Sche

Mortgage Servicing Rights (Schedule of Sensitivity Analysis of Fair Value) (Details) - Mortgage servicing rights $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018USD ($)$ / loan	Dec. 31, 2017USD ($)$ / loan
Servicing Assets at Fair Value [Line Items]
Option adjusted spread, Actual (as a percent)	5.03%	6.29%
Option adjusted spread, Decline in fair value due to 10% adverse change	$ 308	$ 286
Option adjusted spread, Decline in fair value due to 20% adverse change	$ 304	$ 282
Constant prepayment rate, Actual (as a percent)	8.98%	9.93%
Constant prepayment rate, Decline in fair value due to 10% adverse change	$ 303	$ 283
Constant prepayment rate, Decline in fair value due to 20% adverse change	$ 294	$ 277
Weighted average annual cost to service per loan, Actual (in usd per loan) | $ / loan	80.79	73
Weighted average annual cost to service per loan, Decline in fair value due to 10% adverse change	$ 310	$ 288
Weighted average annual cost to service per loan, Decline in fair value due to 20% adverse change	$ 307	$ 286

Mortgage Servicing Rights (Inco

Mortgage Servicing Rights (Income and Fees from Associated with Mortgage Servicing Asset and Mortgage Loan Subserviced) (Details) - Residential first mortgage - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Servicing Assets at Fair Value [Line Items]
Total return included in net return on mortgage servicing rights	$ 13	$ 6	$ 26	$ 26
Net return (loss) on mortgage servicing rights
Servicing Assets at Fair Value [Line Items]
Servicing fees, ancillary income and late fees	17	14	46	43
Changes in fair value	7	(9)	12	(7)
Gain (loss) on MSR derivatives	(11)	0	(27)	(3)
Net transaction costs	0	1	(5)	(7)
Net Loan Administration Income
Servicing Assets at Fair Value [Line Items]
Servicing fees, ancillary income and late fees	14	9	36	26
Other servicing charges	(9)	(4)	(21)	(10)
Total income on mortgage loans subserviced, included in loan administration	$ 5	$ 5	$ 15	$ 16

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Details) - USD ($)	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Derivative
Stockholders' equity	$ 1,518,000,000		$ 1,399,000,000	$ 1,451,000,000		$ 1,336,000,000
Estimated amount to be reclassified from OCI into earnings during next 12 months	3,000,000
Right to reclaim cash	24,000,000		26,000,000
Obligation to return cash	44,000,000		18,000,000
Carrying Value | Interest rate swaps
Derivative
Derivative instrument	30,000,000		0
Changes in Value | Interest rate swaps
Derivative
Derivative instrument	0		0
Derivatives not designated as hedging instruments
Derivative
Right to reclaim cash	24,000,000		9,000,000
Obligation to receive cash irrespective of position	4,000,000		7,000,000
Obligation to return cash	44,000,000		18,000,000
Derivatives designated as hedging instruments
Derivative
Right to reclaim cash	20,000,000		19,000,000
Derivatives designated as hedging instruments | Interest rate swaps
Derivative
Right to reclaim cash			17,000,000
Accumulated other comprehensive income, cash flow hedge
Derivative
Stockholders' equity	$ 23,000,000	$ 24,000,000	$ 2,000,000	$ (3,000,000)	$ (3,000,000)	$ 1,000,000

Derivative Financial Instrume_4

Derivative Financial Instruments (Notional Amount, Estimated Fair Value and Maturity) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Other liabilities
Derivative
Derivative liability, Notional Amount	$ 3,396	$ 4,237
Derivative liability, Fair Value	20	10
Derivatives designated as hedging instruments | Interest rate swaps
Derivative
Derivative liability, Fair Value		1
Derivatives designated as hedging instruments | Other liabilities | Interest rate swaps
Derivative
Derivative liability, Notional Amount	30	830
Derivative liability, Fair Value	0	1
Derivatives not designated as hedging instruments
Derivative
Derivative asset, Fair Value	42	15
Derivative liability, Fair Value	19	10
Derivatives not designated as hedging instruments | Futures
Derivative
Derivative liability, Fair Value	0	0
Derivatives not designated as hedging instruments | Mortgage backed securities forwards
Derivative
Derivative asset, Fair Value	19	4
Derivative liability, Fair Value	6	6
Derivatives not designated as hedging instruments | Interest rate swaps and swaptions
Derivative
Derivative asset, Fair Value	23	11
Derivatives not designated as hedging instruments | Interest rate swaps
Derivative
Derivative liability, Fair Value	13	4
Derivatives not designated as hedging instruments | Other assets
Derivative
Derivative asset, Notional Amount	12,480	9,313
Derivative asset, Fair Value	62	39
Derivatives not designated as hedging instruments | Other assets | Futures
Derivative
Derivative asset, Notional Amount	2,494	1,597
Derivative asset, Fair Value	0	0
Derivatives not designated as hedging instruments | Other assets | Mortgage backed securities forwards
Derivative
Derivative asset, Notional Amount	4,670	2,646
Derivative asset, Fair Value	19	4
Derivatives not designated as hedging instruments | Other assets | Rate lock commitments
Derivative
Derivative asset, Notional Amount	3,121	3,629
Derivative asset, Fair Value	20	24
Derivatives not designated as hedging instruments | Other assets | Interest rate swaps and swaptions
Derivative
Derivative asset, Notional Amount	2,195	1,441
Derivative asset, Fair Value	23	11
Derivatives not designated as hedging instruments | Other liabilities | Futures
Derivative
Derivative liability, Notional Amount	309	209
Derivative liability, Fair Value	0	0
Derivatives not designated as hedging instruments | Other liabilities | Mortgage backed securities forwards
Derivative
Derivative liability, Notional Amount	1,903	3,197
Derivative liability, Fair Value	6	6
Derivatives not designated as hedging instruments | Other liabilities | Rate lock commitments
Derivative
Derivative liability, Notional Amount	419	214
Derivative liability, Fair Value	1	0
Derivatives not designated as hedging instruments | Other liabilities | Interest rate swaps
Derivative
Derivative liability, Notional Amount	765	617
Derivative liability, Fair Value	$ 13	$ 4

Derivative Financial Instrume_5

Derivative Financial Instruments (Master Netting Schedule) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Derivative Asset
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	$ 44	$ 18
Derivative Liability
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	24	26
Derivatives not designated as hedging instruments
Derivative Asset
Gross Amount	42	15
Gross Amounts Netted in the Statement of Financial Position	0	0
Net Amount Presented in the Statement of Financial Position	42	15
Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	44	18
Derivative Liability
Gross Amount	19	10
Gross Amounts Netted in the Statement of Financial Position	0	0
Net Amount Presented in the Statement of Financial Position	19	10
Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	24	9
Derivatives not designated as hedging instruments | Mortgage backed securities forwards
Derivative Asset
Gross Amount	19	4
Gross Amounts Netted in the Statement of Financial Position	0	0
Net Amount Presented in the Statement of Financial Position	19	4
Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	18	8
Derivative Liability
Gross Amount	6	6
Gross Amounts Netted in the Statement of Financial Position	0	0
Net Amount Presented in the Statement of Financial Position	6	6
Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	2	2
Derivatives not designated as hedging instruments | Interest rate swaps and swaptions
Derivative Asset
Gross Amount	23	11
Gross Amounts Netted in the Statement of Financial Position	0	0
Net Amount Presented in the Statement of Financial Position	23	11
Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	26	10
Derivatives not designated as hedging instruments | Futures
Derivative Liability
Gross Amount	0	0
Gross Amounts Netted in the Statement of Financial Position	0	0
Net Amount Presented in the Statement of Financial Position	0	0
Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	2	2
Derivatives not designated as hedging instruments | Interest rate swaps
Derivative Liability
Gross Amount	13	4
Gross Amounts Netted in the Statement of Financial Position	0	0
Net Amount Presented in the Statement of Financial Position	13	4
Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	20	5
Derivatives designated as hedging instruments
Derivative Liability
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral	$ 20	19
Derivatives designated as hedging instruments | Interest rate swaps
Derivative Liability
Gross Amount		1
Gross Amounts Netted in the Statement of Financial Position		0
Net Amount Presented in the Statement of Financial Position		1
Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments		0
Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral		$ 17

Derivative Financial Instrume_6

Derivative Financial Instruments (Gain Recognized in Income) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss)
Amount of gain reclassified from AOCI into income	$ 124,000,000	$ 103,000,000	$ 345,000,000	$ 283,000,000
Fair Value Hedges
Derivative Instruments, Gain (Loss)
Net gain (loss) recognized in income on derivative instruments	0	0	0	0
Derivatives designated as hedging instruments
Derivative Instruments, Gain (Loss)
Net gain (loss) recognized in income on derivative instruments	1,000,000	0	0	5,000,000
Derivatives designated as hedging instruments | Accumulated other comprehensive income, cash flow hedge | Reclassification out of accumulated other comprehensive income
Derivative Instruments, Gain (Loss)
Amount of gain reclassified from AOCI into income	$ 1,000,000	$ 0	$ 0	$ 5,000,000

Derivative Financial Instrume_7

Derivative Financial Instruments (Schedule of Unrealized Gains or Losses) (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative
Net gain (loss) recognized in income on derivative instruments	$ 11	$ (9)	$ (12)	$ (18)
Futures | Net return (loss) on mortgage servicing rights
Derivative
Net gain (loss) recognized in income on derivative instruments	(1)	(1)	(4)	(1)
Interest rate swaps | Net return (loss) on mortgage servicing rights
Derivative
Net gain (loss) recognized in income on derivative instruments	(8)	(2)	(16)	(7)
Interest rate swaps | Other noninterest income
Derivative
Net gain (loss) recognized in income on derivative instruments	1	0	2	1
Mortgage backed securities forwards | Net return (loss) on mortgage servicing rights
Derivative
Net gain (loss) recognized in income on derivative instruments	(2)	2	(6)	5
Rate lock commitments and forward agency and loan sales | Net (loss) gain on loan sales
Derivative
Net gain (loss) recognized in income on derivative instruments	$ 21	$ (8)	$ 12	$ (16)

Borrowings (FHLB Advances) (Det

Borrowings (FHLB Advances) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Short term debt FHLB advances and other	$ 3,199	$ 4,260
Current portion of fixed rate advances	1,280	1,405
Federal Home Loan Bank advances	4,479	5,665
Long-term fixed rate advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Current portion of fixed rate advances	50	125
Short-term adjustable rate
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Short term debt FHLB advances and other	$ 3,194	$ 4,260
Federal Home Loan Bank advances, rate (as a percent)	2.18%	1.40%
Short-term variable adjustable rate
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Short term debt FHLB advances and other	$ 5	$ 0
Federal Home Loan Bank advances, rate (as a percent)	2.54%	0.00%
Long-term LIBOR adjustable advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank advances, rate (as a percent)	2.55%	1.76%
Current portion of fixed rate advances	$ 1,130	$ 1,130
Long-term fixed rate advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank advances, rate (as a percent)	1.53%	1.41%
Current portion of fixed rate advances	$ 150	$ 275

Borrowings (Narrative) (Details

Borrowings (Narrative) (Details) - USD ($)	Jul. 11, 2016	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument
FHLB line of credit, maximum amount available		$ 10,000,000,000
FHLB line of credit, available collateral amount		4,500,000,000
FHLB advances, line of credit		2,100,000,000
Current portion of fixed rate advances		1,280,000,000	$ 1,405,000,000
Payment of interest on trust preferred securities		0
Senior Note Maturing 2021 | 6.125% senior notes
Debt Instrument
Debt instrument face amount	$ 250,000,000
Debt instrument redemption rate	100.00%
Three Month LIBOR
Debt Instrument
Current portion of fixed rate advances		$ 1,130,000,000	$ 1,130,000,000
Three Month LIBOR
Debt Instrument
Debt instrument, variable interest rate, term		3 months
FHLB advances, prepayment notification period (in months)		3 months
Treasury Rate | Senior Note Maturing 2021 | 6.125% senior notes
Debt Instrument
Variable rate on interest rate	0.50%

Borrowings (Schedule of FHLB Ad

Borrowings (Schedule of FHLB Advances, Disclosures) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Debt Disclosure [Abstract]
Maximum outstanding at any month end	$ 5,085	$ 5,365	$ 5,740	$ 5,365
Average outstanding balance	4,745	5,043	4,996	4,239
Average remaining borrowing capacity	$ 2,165	$ 1,182	$ 1,830	$ 1,297
Weighted average interest rate (as a percent)	2.08%	1.36%	1.88%	1.26%

Borrowings (Schedule of FHLB, A

Borrowings (Schedule of FHLB, Advances, Maturity Summary) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,018	$ 3,199
2,019	50
2,020	0
2,021	0
Thereafter	1,230
Federal Home Loan Bank advances	$ 4,479	$ 5,665

Borrowings (Senior Notes and Tr

Borrowings (Senior Notes and Trust Preferred Securities) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 247	$ 247
Long-term debt	495	494
6.125% senior notes, matures 2021
Trust Preferred Securities [Abstract]
Senior note	$ 248	$ 247
Interest rate	6.125%	6.125%
3ML plus 3.25% maturing 2032
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 26	$ 26
Interest rate	5.62%	4.92%
3ML plus 3.25% maturing 2033 A
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 26	$ 26
Interest rate	5.59%	4.61%
3ML plus 3.25% maturing 2033 B
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 26	$ 26
Interest rate	5.59%	4.94%
3ML plus 2.00% maturing 2035 A
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 26	$ 26
Interest rate	4.34%	3.36%
3ML plus 2.00% maturing 2035 B
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 26	$ 26
Interest rate	4.34%	3.36%
3ML plus 1.75% maturing 2035
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 51	$ 51
Interest rate	4.08%	3.34%
3ML plus 1.50% maturing 2035
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 25	$ 25
Interest rate	3.84%	2.86%
3ML plus 1.45% maturing 2037
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 25	$ 25
Interest rate	3.78%	3.04%
3ML plus 2.50% maturing 2037
Trust Preferred Securities [Abstract]
Trust preferred securities	$ 16	$ 16
Interest rate	4.83%	4.09%
Three Month LIBOR | 3ML plus 3.25% maturing 2032
Trust Preferred Securities [Abstract]
Variable rate on interest rate	3.25%
Three Month LIBOR | 3ML plus 3.25% maturing 2033 A
Trust Preferred Securities [Abstract]
Variable rate on interest rate	3.25%
Three Month LIBOR | 3ML plus 3.25% maturing 2033 B
Trust Preferred Securities [Abstract]
Variable rate on interest rate	3.25%
Three Month LIBOR | 3ML plus 2.00% maturing 2035 A
Trust Preferred Securities [Abstract]
Variable rate on interest rate	2.00%
Three Month LIBOR | 3ML plus 2.00% maturing 2035 B
Trust Preferred Securities [Abstract]
Variable rate on interest rate	2.00%
Three Month LIBOR | 3ML plus 1.75% maturing 2035
Trust Preferred Securities [Abstract]
Variable rate on interest rate	1.75%
Three Month LIBOR | 3ML plus 1.50% maturing 2035
Trust Preferred Securities [Abstract]
Variable rate on interest rate	1.50%
Three Month LIBOR | 3ML plus 1.45% maturing 2037
Trust Preferred Securities [Abstract]
Variable rate on interest rate	1.45%
Three Month LIBOR | 3ML plus 2.50% maturing 2037
Trust Preferred Securities [Abstract]
Variable rate on interest rate	2.50%

Warrants (Narratives) (Details)

Warrants (Narratives) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Jan. 30, 2009
Preferred Stock
Class of Warrant or Right [Line Items]
Preferred stock, shares outstanding (in shares)			266,657
May Investors
Class of Warrant or Right [Line Items]
Warrants exercised (in shares)	237,627
Warrants outstanding (in shares)		0
Liability from warrants		$ 0
May Investors | Common Stock
Class of Warrant or Right [Line Items]
Shares issued (in shares)	154,313
Troubled Asset Relief Program
Class of Warrant or Right [Line Items]
Number of shares auctioned by warrants			645,138
Warrants exercised (usd per share)			$ 62

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated other comprehensive income (loss)
Beginning balance			$ 1,399	$ 1,336
Other comprehensive income (loss), net of tax	$ (10)	$ 1	(26)	(1)
Ending balance	1,518	1,451	1,518	1,451
Investment securities
Accumulated other comprehensive income (loss)
Beginning balance	(56)	(6)	(18)	(8)
Unrealized gain (loss)	(11)	0	(55)	2
Less: Tax provision (benefit)	(2)	0	(13)	1
Net unrealized loss, net of tax	(9)	0	(42)	1
Reclassification out of AOCI	0	1	0	3
Less: Tax provision (benefit)	0	0	0	1
Net unrealized gain reclassified out of AOCI	0	1	0	2
Reclassification of certain income tax effects	0	0	(5)	0
Other comprehensive income (loss), net of tax	(9)	1	(47)	3
Ending balance	(65)	(5)	(65)	(5)
Cash Flow Hedges
Accumulated other comprehensive income (loss)
Beginning balance	24	(3)	2	1
Unrealized gain (loss)	0	0	28	(2)
Less: Tax provision (benefit)	0	0	7	(1)
Net unrealized loss, net of tax	0	0	21	(1)
Reclassification out of AOCI	(1)	0	0	(5)
Less: Tax provision (benefit)	0	0	0	(2)
Net unrealized gain reclassified out of AOCI	(1)	0	0	(3)
Other comprehensive income (loss), net of tax	(1)	0	21	(4)
Ending balance	$ 23	$ (3)	$ 23	$ (3)

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income	$ 48	$ 40	$ 133	$ 108
Weighted Average Shares
Weighted average common shares outstanding (in shares)	57,600,360	57,162,025	57,483,802	57,062,696
Effect of dilutive securities
May Investor Warrants (in shares)	0	0	0	16,383
Stock-based awards (in shares)	732,238	1,024,568	818,118	1,054,217
Weighted average diluted common shares (in shares)	58,332,598	58,186,593	58,301,920	58,133,296
Earnings per common share
Basic earnings per common share (in usd per share)	$ 0.84	$ 0.71	$ 2.32	$ 1.90
Effect of dilutive securities
May Investors Warrants (in usd per share)	0	0	0	0
Stock-based awards (in usd per share)	(0.01)	(0.01)	(0.04)	(0.04)
Diluted earnings per common share (in usd per share)	$ 0.83	$ 0.70	$ 2.28	$ 1.86

Stock-Based Compensation (Narra

Stock-Based Compensation (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jul. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ 4	$ 2	$ 8	$ 8
Employee Stock Purchase Plan | 2017 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation shares authorized (in shares)					800,000
Shares issued during period (in shares)	23,623		88,566

Stock-Based Compensation (Restr

Stock-Based Compensation (Restricted Stock Units) (Details) - Restricted Stock and Restricted Stock Units - $ / shares	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Shares
Non-vested balance at beginning of period (in shares)	1,796,628	1,290,450
Granted (in shares)	0	863,342
Vested (in shares)	(4,901)	(239,688)
Canceled and forfeited (in shares)	(8,312)	(130,689)
Non-vested balance at end of period (in shares)	1,783,415	1,783,415
Weighted — Average Grant-Date Fair Value per Share
Non-vested balance at beginning of period (in usd per share)	$ 27.33	$ 20.52
Granted (in usd per share)	0	34.36
Vested (in usd per share)	26.73	19.68
Canceled and forfeited (in usd per share)	31.23	20.72
Non-vested balance at end of period (in usd per share)	$ 27.32	$ 27.32

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 12	$ 20	$ 33	$ 52
Effective tax provision rate (as a percent)	20.00%	32.40%	20.10%	32.30%
Unrecognized tax benefits, recognition period (in months)			12 months

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tangible capital (to tangible assets), Actual, Amount	$ 1,540	$ 1,442
Tangible capital (to tangible assets), Actual, Ratio	8.36%	8.51%
Tier 1 capital (to adjusted tangible assets), Actual, Amount	$ 1,540	$ 1,442
Tier 1 capital (to adjusted tangible assets), Actual, Ratio (as a percent)	8.36%	8.51%
Tier 1 capital (to adjusted tangible assets), For Capital Adequacy Purposes, Amount	$ 737	$ 678
Tier 1 capital (to adjusted tangible assets), For Required Adequacy Purposes, Ratio (as a percent)	4.00%	4.00%
Tier 1 capital (to adjusted tangible assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 921	$ 848
Tier 1 capital (to adjusted tangible assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	5.00%	5.00%
Common equity Tier 1 capital (to RWA), Actual, Amount	$ 1,300	$ 1,216
Common equity Tier 1 capital (to RWA), Actual, Ratio (as a percent)	11.01%	11.50%
Common equity Tier 1 capital (to RWA), Required for Capital Adequacy, Amount	$ 532	$ 476
Common equity Tier 1 capital (to RWA), Required for Capital Adequacy, Ratio (as a percent)	4.50%	4.50%
Common equity Tier 1 capital (to RWA), Required to Be Well Capitalized, Amount	$ 768	$ 688
Common equity Tier 1 capital (to RWA), Required to Be Well Capitalized, Ratio (as a percent)	6.50%	6.50%
Tier 1 capital (to risk-weighted assets), Actual, Amount	$ 1,540	$ 1,442
Tier 1 capital (to risk-weighted assets), Actual, Ratio (as a percent)	13.04%	13.63%
Tier 1 capital (to risk-weighted assets), For Capital Adequacy Purposes, Amount	$ 709	$ 635
Tier 1 capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio (as a percent)	6.00%	6.00%
Tier 1 capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 945	$ 846
Tier 1 capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	8.00%	8.00%
Total capital (to risk-weighted assets), Actual, Amount	$ 1,677	$ 1,576
Total capital (to risk-weighted assets), Actual, Ratio (as a percent)	14.20%	14.90%
Total capital (to risk-weighted assets), For Capital Adequacy Purposes, Amount	$ 945	$ 846
Total capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio (as a percent)	8.00%	8.00%
Total capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,181	$ 1,058
Total capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	10.00%	10.00%
Flagstar Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tangible capital (to tangible assets), Actual, Amount	$ 1,617	$ 1,531
Tangible capital (to tangible assets), Actual, Ratio	8.77%	9.04%
Tier 1 capital (to adjusted tangible assets), Actual, Amount	$ 1,617	$ 1,531
Tier 1 capital (to adjusted tangible assets), Actual, Ratio (as a percent)	8.77%	9.04%
Tier 1 capital (to adjusted tangible assets), For Capital Adequacy Purposes, Amount	$ 737	$ 677
Tier 1 capital (to adjusted tangible assets), For Required Adequacy Purposes, Ratio (as a percent)	4.00%	4.00%
Tier 1 capital (to adjusted tangible assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 922	$ 847
Tier 1 capital (to adjusted tangible assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	5.00%	5.00%
Common equity Tier 1 capital (to RWA), Actual, Amount	$ 1,617	$ 1,531
Common equity Tier 1 capital (to RWA), Actual, Ratio (as a percent)	13.68%	14.46%
Common equity Tier 1 capital (to RWA), Required for Capital Adequacy, Amount	$ 532	$ 476
Common equity Tier 1 capital (to RWA), Required for Capital Adequacy, Ratio (as a percent)	4.50%	4.50%
Common equity Tier 1 capital (to RWA), Required to Be Well Capitalized, Amount	$ 768	$ 688
Common equity Tier 1 capital (to RWA), Required to Be Well Capitalized, Ratio (as a percent)	6.50%	6.50%
Tier 1 capital (to risk-weighted assets), Actual, Amount	$ 1,617	$ 1,531
Tier 1 capital (to risk-weighted assets), Actual, Ratio (as a percent)	13.68%	14.46%
Tier 1 capital (to risk-weighted assets), For Capital Adequacy Purposes, Amount	$ 709	$ 635
Tier 1 capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio (as a percent)	6.00%	6.00%
Tier 1 capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 945	$ 847
Tier 1 capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	8.00%	8.00%
Total capital (to risk-weighted assets), Actual, Amount	$ 1,753	$ 1,664
Total capital (to risk-weighted assets), Actual, Ratio (as a percent)	14.84%	15.72%
Total capital (to risk-weighted assets), For Capital Adequacy Purposes, Amount	$ 945	$ 847
Total capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio (as a percent)	8.00%	8.00%
Total capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,182	$ 1,059
Total capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	10.00%	10.00%

Legal Proceedings, Contingenc_3

Legal Proceedings, Contingencies and Commitments (Narratives) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Loss Contingencies
Tier 1 leverage capital ratio	5.00%	5.00%
Business acquisition threshold	33.30%
Accrued reserve for contingent liabilities	$ 1	$ 1
Letter of credit, reserve amount	$ 3	$ 3
Flagstar Bank
Loss Contingencies
Tier 1 leverage capital ratio	5.00%	5.00%
DOJ Agreement | Flagstar Bank
Loss Contingencies
Tier 1 leverage capital ratio	11.00%
DOJ Agreement
Loss Contingencies
Litigation settlement, initial payment	$ 15
Litigation settlement payment amount	118
Litigation settlement liability	60	$ 60
DOJ Agreement | Additional payments
Loss Contingencies
Annual payments (up to)	$ 25

Legal Proceedings, Contingenc_4

Legal Proceedings, Contingencies and Commitments (Credit Commitments) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Mortgage loans interest-rate lock commitments
Loss Contingencies
Commitments to extend credit	$ 3,567	$ 3,667
Warehouse loan commitments
Loss Contingencies
Commitments to extend credit	2,422	1,618
Commercial and industrial commitments
Loss Contingencies
Commitments to extend credit	728	695
Other commercial commitments
Loss Contingencies
Commitments to extend credit	1,063	1,021
HELOC commitments
Loss Contingencies
Commitments to extend credit	395	283
Other consumer commitments
Loss Contingencies
Commitments to extend credit	123	15
Standby and commercial letters of credit
Loss Contingencies
Commitments to extend credit	$ 66	$ 50

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	$ 1,857	$ 1,853
Loans held-for-sale, fair value	4,815	4,300
Loans held-for-investment	11	12
Mortgage servicing rights	313	291
Total assets at fair value	4,826	4,312
Agency - Commercial
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	1,094	987
Agency - Residential
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	674	794
Municipal obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	32	34
Corporate debt obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	41	38
Total Fair Value
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	1,857	1,853
Loans held-for-sale, fair value	4,836	4,322
Loans held-for-investment	8,839	7,667
Mortgage servicing rights	313	291
Liabilities, Fair Value Disclosure [Abstract]
Contingent consideration	(11)	(25)
Level 1 | Total Fair Value
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	0
Loans held-for-sale, fair value	0	0
Loans held-for-investment	0	0
Mortgage servicing rights	0	0
Liabilities, Fair Value Disclosure [Abstract]
Contingent consideration	0	0
Level 2 | Total Fair Value
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	1,857	1,853
Loans held-for-sale, fair value	4,836	4,322
Loans held-for-investment	8	8
Mortgage servicing rights	0	0
Liabilities, Fair Value Disclosure [Abstract]
Contingent consideration	0	0
Level 3 | Total Fair Value
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	0
Loans held-for-sale, fair value	0	0
Loans held-for-investment	8,831	7,659
Mortgage servicing rights	313	291
Liabilities, Fair Value Disclosure [Abstract]
Contingent consideration	(11)	(25)
Recurring | Total Fair Value
Assets, Fair Value Disclosure [Abstract]
Mortgage servicing rights	313	291
Total assets at fair value	7,058	6,495
Liabilities, Fair Value Disclosure [Abstract]
DOJ litigation settlement	(60)	(60)
Total liabilities at fair value	(91)	(96)
Recurring | Total Fair Value | Rate lock commitments
Assets, Fair Value Disclosure [Abstract]
Derivative assets	20	24
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	(1)
Recurring | Total Fair Value | Mortgage-backed securities forwards
Assets, Fair Value Disclosure [Abstract]
Derivative assets	19	4
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	(6)	(6)
Recurring | Total Fair Value | Interest rate swaps and swaptions
Assets, Fair Value Disclosure [Abstract]
Derivative assets	23	11
Recurring | Total Fair Value | Interest rate swap on FHLB advances
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities		(1)
Recurring | Total Fair Value | Interest rate swaps
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	(13)	(4)
Recurring | Total Fair Value | Contingent consideration
Liabilities, Fair Value Disclosure [Abstract]
Contingent consideration	(11)	(25)
Recurring | Total Fair Value | Residential first mortgage loans
Assets, Fair Value Disclosure [Abstract]
Loans held-for-sale, fair value	4,815	4,300
Loans held-for-investment	8	8
Recurring | Total Fair Value | Home equity
Assets, Fair Value Disclosure [Abstract]
Loans held-for-investment	3	4
Recurring | Total Fair Value | Agency - Commercial
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	1,094	987
Recurring | Total Fair Value | Agency - Residential
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	674	794
Recurring | Total Fair Value | Municipal obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	32	34
Recurring | Total Fair Value | Corporate debt obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	41	38
Recurring | Total Fair Value | Other MBS
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	16
Recurring | Level 1
Assets, Fair Value Disclosure [Abstract]
Mortgage servicing rights	0	0
Total assets at fair value	0	0
Liabilities, Fair Value Disclosure [Abstract]
DOJ litigation settlement	0	0
Total liabilities at fair value	0	0
Recurring | Level 1 | Rate lock commitments
Assets, Fair Value Disclosure [Abstract]
Derivative assets	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	0
Recurring | Level 1 | Mortgage-backed securities forwards
Assets, Fair Value Disclosure [Abstract]
Derivative assets	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	0	0
Recurring | Level 1 | Interest rate swaps and swaptions
Assets, Fair Value Disclosure [Abstract]
Derivative assets	0	0
Recurring | Level 1 | Interest rate swap on FHLB advances
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities		0
Recurring | Level 1 | Interest rate swaps
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	0	0
Recurring | Level 1 | Contingent consideration
Liabilities, Fair Value Disclosure [Abstract]
Contingent consideration	0	0
Recurring | Level 1 | Residential first mortgage loans
Assets, Fair Value Disclosure [Abstract]
Loans held-for-sale, fair value	0	0
Loans held-for-investment	0	0
Recurring | Level 1 | Home equity
Assets, Fair Value Disclosure [Abstract]
Loans held-for-investment	0	0
Recurring | Level 1 | Agency - Commercial
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	0
Recurring | Level 1 | Agency - Residential
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	0
Recurring | Level 1 | Municipal obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	0
Recurring | Level 1 | Corporate debt obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	0
Recurring | Level 1 | Other MBS
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0
Recurring | Level 2
Assets, Fair Value Disclosure [Abstract]
Mortgage servicing rights	0	0
Total assets at fair value	6,722	6,176
Liabilities, Fair Value Disclosure [Abstract]
DOJ litigation settlement	0	0
Total liabilities at fair value	(19)	(11)
Recurring | Level 2 | Rate lock commitments
Assets, Fair Value Disclosure [Abstract]
Derivative assets	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	0
Recurring | Level 2 | Mortgage-backed securities forwards
Assets, Fair Value Disclosure [Abstract]
Derivative assets	19	4
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	(6)	(6)
Recurring | Level 2 | Interest rate swaps and swaptions
Assets, Fair Value Disclosure [Abstract]
Derivative assets	23	11
Recurring | Level 2 | Interest rate swap on FHLB advances
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities		(1)
Recurring | Level 2 | Interest rate swaps
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	(13)	(4)
Recurring | Level 2 | Contingent consideration
Liabilities, Fair Value Disclosure [Abstract]
Contingent consideration	0	0
Recurring | Level 2 | Residential first mortgage loans
Assets, Fair Value Disclosure [Abstract]
Loans held-for-sale, fair value	4,815	4,300
Loans held-for-investment	8	8
Recurring | Level 2 | Home equity
Assets, Fair Value Disclosure [Abstract]
Loans held-for-investment	0	0
Recurring | Level 2 | Agency - Commercial
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	1,094	987
Recurring | Level 2 | Agency - Residential
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	674	794
Recurring | Level 2 | Municipal obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	32	34
Recurring | Level 2 | Corporate debt obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	41	38
Recurring | Level 2 | Other MBS
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	16
Recurring | Level 3
Assets, Fair Value Disclosure [Abstract]
Mortgage servicing rights	313	291
Total assets at fair value	336	319
Liabilities, Fair Value Disclosure [Abstract]
DOJ litigation settlement	(60)	(60)
Total liabilities at fair value	(72)	(85)
Recurring | Level 3 | Rate lock commitments
Assets, Fair Value Disclosure [Abstract]
Derivative assets	20	24
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	(1)
Recurring | Level 3 | Mortgage-backed securities forwards
Assets, Fair Value Disclosure [Abstract]
Derivative assets	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	0	0
Recurring | Level 3 | Interest rate swaps and swaptions
Assets, Fair Value Disclosure [Abstract]
Derivative assets	0	0
Recurring | Level 3 | Interest rate swap on FHLB advances
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities		0
Recurring | Level 3 | Interest rate swaps
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	0	0
Recurring | Level 3 | Contingent consideration
Liabilities, Fair Value Disclosure [Abstract]
Contingent consideration	(11)	(25)
Recurring | Level 3 | Residential first mortgage loans
Assets, Fair Value Disclosure [Abstract]
Loans held-for-sale, fair value	0	0
Loans held-for-investment	0	0
Recurring | Level 3 | Home equity
Assets, Fair Value Disclosure [Abstract]
Loans held-for-investment	3	4
Recurring | Level 3 | Agency - Commercial
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	0
Recurring | Level 3 | Agency - Residential
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	0
Recurring | Level 3 | Municipal obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	0
Recurring | Level 3 | Corporate debt obligations
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	0	$ 0
Recurring | Level 3 | Other MBS
Assets, Fair Value Disclosure [Abstract]
Investment securities available-for-sale	$ 0

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details)	9 Months Ended
	Sep. 30, 2018USD ($)
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers of assets or liabilities at fair value between fair value levels	$ 0

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Measurements Using Significant Unobservable Inputs) (Details) - Recurring - Level 3 - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Assets, Unobservable Input Reconciliation
Balance at Beginning of Period	$ 292	$ 215	$ 319	$ 418
Total Gains (Losses) Recorded in Earnings	2	12	(25)	50
Purchases / Originations	160	157	474	377
Sales	(51)	(4)	(273)	(312)
Settlements	0	(1)	(1)	(8)
Transfers In (Out)	(68)	(97)	(159)	(243)
Balance at End of Period	335	282	335	282
Liabilities, Unobservable Input Reconciliation
Balance at Beginning of Period	(78)	(83)	(85)	(60)
Total unrealized gains/(losses) recorded in earnings	3	(1)	8	(1)
Purchases / Originations	0	(2)	0	(25)
Sales	0	0	0	0
Settlements	4	0	6	0
Transfers In (Out)	0	0	0	0
Balance at End of Period	(71)	(86)	(71)	(86)
Home equity
Assets, Unobservable Input Reconciliation
Balance at Beginning of Period	3	5	4	65
Total Gains (Losses) Recorded in Earnings	0	0	0	1
Purchases / Originations	0	0	0	0
Sales	0	0	0	0
Settlements	0	(1)	(1)	(7)
Transfers In (Out)	0	0	0	(55)
Balance at End of Period	3	4	3	4
Home equity | Loans held-for-sale
Assets, Unobservable Input Reconciliation
Balance at Beginning of Period				0
Total Gains (Losses) Recorded in Earnings				1
Purchases / Originations				0
Sales				(52)
Settlements				(1)
Transfers In (Out)				52
Balance at End of Period		0		0
Mortgage servicing rights
Assets, Unobservable Input Reconciliation
Balance at Beginning of Period	257	184	291	335
Total Gains (Losses) Recorded in Earnings	7	(9)	12	(7)
Purchases / Originations	100	75	283	178
Sales	(51)	(4)	(273)	(260)
Settlements	0	0	0	0
Transfers In (Out)	0	0	0	0
Balance at End of Period	313	246	313	246
Rate lock commitments
Assets, Unobservable Input Reconciliation
Balance at Beginning of Period	32	26	24	18
Total Gains (Losses) Recorded in Earnings	(5)	21	(37)	55
Purchases / Originations	60	82	191	199
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers In (Out)	(68)	(97)	(159)	(240)
Balance at End of Period	19	32	19	32
DOJ litigation settlement
Liabilities, Unobservable Input Reconciliation
Balance at Beginning of Period	(60)	(60)	(60)	(60)
Total unrealized gains/(losses) recorded in earnings	0	0	0	0
Purchases / Originations	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers In (Out)	0	0	0	0
Balance at End of Period	(60)	(60)	(60)	(60)
Contingent consideration
Liabilities, Unobservable Input Reconciliation
Balance at Beginning of Period	(18)	(23)	(25)	0
Total unrealized gains/(losses) recorded in earnings	3	(1)	8	(1)
Purchases / Originations	0	(2)	0	(25)
Sales	0	0	0	0
Settlements	4	0	6	0
Transfers In (Out)	0	0	0	0
Balance at End of Period	$ (11)	$ (26)	$ (11)	$ (26)

Fair Value Measurements (Level

Fair Value Measurements (Level 3 Quantitative Information) (Details) - Recurring - Level 3 $ in Millions	Sep. 30, 2018USD ($)$ / loan	Dec. 31, 2017USD ($)$ / loan
Home equity
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held-for-investment	$ 3	$ 4
Home equity | Discount rate | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for investment, fair value input (as a percent)	0.072	0.072
Home equity | Discount rate | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for investment, fair value input (as a percent)	0.108	0.108
Home equity | Discount rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for investment, fair value input (as a percent)	0.090	0.090
Home equity | Constant prepayment rate | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for investment, fair value input (as a percent)	0.153	0.051
Home equity | Constant prepayment rate | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for investment, fair value input (as a percent)	0.229	0.077
Home equity | Constant prepayment rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for investment, fair value input (as a percent)	0.191	0.064
Home equity | Constant default rate | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for investment, fair value input (as a percent)	0.030	0.030
Home equity | Constant default rate | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for investment, fair value input (as a percent)	0.045	0.045
Home equity | Constant default rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for investment, fair value input (as a percent)	0.036	0.036
Mortgage servicing rights
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage servicing rights	$ 313	$ 291
Mortgage servicing rights | Constant prepayment rate | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Weighted average cost to service per loan (usd per loan)	0	0.080
Mortgage servicing rights | Constant prepayment rate | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Weighted average cost to service per loan (usd per loan)	0.106	0.118
Mortgage servicing rights | Constant prepayment rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Weighted average cost to service per loan (usd per loan)	0.090	0.099
Mortgage servicing rights | Weighted average cost to service per loan | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Weighted average cost to service per loan (usd per loan) | $ / loan	67	58
Mortgage servicing rights | Weighted average cost to service per loan | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Weighted average cost to service per loan (usd per loan) | $ / loan	95	87
Mortgage servicing rights | Weighted average cost to service per loan | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Weighted average cost to service per loan (usd per loan) | $ / loan	81	73
Mortgage servicing rights | Option adjusted spread | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Weighted average cost to service per loan (usd per loan)	0.021	0.050
Mortgage servicing rights | Option adjusted spread | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Weighted average cost to service per loan (usd per loan)	0.253	0.075
Mortgage servicing rights | Option adjusted spread | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Weighted average cost to service per loan (usd per loan)	0.050	0.063
Rate lock commitments
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative assets	$ 19	$ 24
Rate lock commitments | Origination pull-through rate | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Rate lock commitment, fair value input (as a percent)	0.798	0.647
Rate lock commitments | Origination pull-through rate | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Rate lock commitment, fair value input (as a percent)	0.872	0.971
Rate lock commitments | Origination pull-through rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Rate lock commitment, fair value input (as a percent)	0.813	0.820
DOJ litigation settlement
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
DOJ litigation settlement	$ (60)	$ (60)
DOJ litigation settlement | Discount rate | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
DOJ litigation settlement, fair value input (as a percent)	0.072	0.078
DOJ litigation settlement | Discount rate | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
DOJ litigation settlement, fair value input (as a percent)	0.108	0.117
DOJ litigation settlement | Discount rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
DOJ litigation settlement, fair value input (as a percent)	0.090	0.097
DOJ litigation settlement | Asset growth rate | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
DOJ litigation settlement, fair value input (as a percent)	0.042	0.056
DOJ litigation settlement | Asset growth rate | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
DOJ litigation settlement, fair value input (as a percent)	0.175	0.174
DOJ litigation settlement | Asset growth rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
DOJ litigation settlement, fair value input (as a percent)	0.060	0.063
Contingent consideration
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Contingent consideration	$ 11	$ 25
Contingent consideration | Beta | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value inputs, equity volatility	0.6	0.6
Contingent consideration | Beta | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value inputs, equity volatility	1.6	1.6
Contingent consideration | Beta | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value inputs, equity volatility	1.10	1.10
Contingent consideration | Equity volatility | Lower range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value inputs, equity volatility	0.266	0.266
Contingent consideration | Equity volatility | Upper range
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value inputs, equity volatility	0.589	0.589
Contingent consideration | Equity volatility | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value inputs, equity volatility	0.400	0.400

Fair Value Measurements (Fair_2

Fair Value Measurements (Fair Value Inputs, Assets, Quantitative Disclosures) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Level 3 | Residential mortgage servicing rights capitalized | Expected Term
Fair Value Inputs, Assets, Quantitative Information
Weighted average life	6 years 1 month	6 years

Fair Value Measurements (Asse_2

Fair Value Measurements (Assets Measured at Fair Value on a Non-recurring Basis) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	$ 4,815		$ 4,815		$ 4,300
Total assets at fair value	4,826		4,826		4,312
Net gain (loss) on loan sales	43	$ 75	166	$ 189
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Repossessed assets	7		7		8
Total assets at fair value	25		25		35
Fair value losses on repossessed assets			(3)		(4)
Net gain (loss) on loan sales			(9)		(15)
Nonrecurring | Residential first mortgage loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	6		6		6
Impaired loans held-for-investment	12		12		21
Nonrecurring | Residential first mortgage loans | Other noninterest income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value losses on loans			(1)		(1)
Nonrecurring | Residential first mortgage loans | Provision for loan losses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value losses on loans			(5)		(10)
Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Repossessed assets	0		0		0
Total assets at fair value	6		6		6
Nonrecurring | Level 2 | Residential first mortgage loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	6		6		6
Impaired loans held-for-investment	0		0		0
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Repossessed assets	7		7		8
Total assets at fair value	19		19		29
Nonrecurring | Level 3 | Residential first mortgage loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	0		0		0
Impaired loans held-for-investment	$ 12		$ 12		$ 21

Fair Value Measurements (Asse_3

Fair Value Measurements (Assets Measured on a Nonrecurring Basis, Level 3 Quantitative Information) (Details) - Nonrecurring - Level 3 $ in Millions	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Residential first mortgage loans
Fair Value Inputs, Assets, Quantitative Information
Loans held-for-investment	$ 12	$ 21
Residential first mortgage loans | Loss severity discount | Lower range
Fair Value Inputs, Assets, Quantitative Information
Loans held for investment, fair value input (as a percent)	0.25	0.25
Residential first mortgage loans | Loss severity discount | Upper range
Fair Value Inputs, Assets, Quantitative Information
Loans held for investment, fair value input (as a percent)	0.30	0.30
Residential first mortgage loans | Loss severity discount | Weighted Average
Fair Value Inputs, Assets, Quantitative Information
Loans held for investment, fair value input (as a percent)	0.283	0.279
Repossessed assets
Fair Value Inputs, Assets, Quantitative Information
Loans held-for-investment	$ 7
Repossessed assets		$ 8
Repossessed assets | Loss severity discount | Lower range
Fair Value Inputs, Assets, Quantitative Information
Repossessed asset, fair value input (as a percent)	0	0
Repossessed assets | Loss severity discount | Upper range
Fair Value Inputs, Assets, Quantitative Information
Repossessed asset, fair value input (as a percent)	1	1
Repossessed assets | Loss severity discount | Weighted Average
Fair Value Inputs, Assets, Quantitative Information
Repossessed asset, fair value input (as a percent)	0.264	0.709

Fair Value Measurements (Fair_3

Fair Value Measurements (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Assets
Investment securities available-for-sale	$ 1,857	$ 1,853
Investment securities held-to-maturity	690	924
Loans held-for-sale	4,815	4,300
Loans held-for-investment	11	12
Mortgage servicing rights	313	291
Carrying Value
Assets
Cash and cash equivalents	264	204
Investment securities available-for-sale	1,857	1,853
Investment securities held-to-maturity	724	939
Loans held-for-sale	4,835	4,321
Loans held-for-investment	8,966	7,713
Loans with government guarantees	305	271
Mortgage servicing rights	313	291
Federal Home Loan Bank stock	303	303
Bank owned life insurance	338	330
Repossessed assets	7	8
Other assets, foreclosure claims	58	84
Derivative financial instruments, assets	62	39
Liabilities
Federal Home Loan Bank advances	(4,479)	(5,665)
Long-term debt	(495)	(494)
DOJ litigation settlement	(60)	(60)
Contingent consideration	(11)	(25)
Derivative financial instruments, liabilities	(20)	(11)
Carrying Value | Demand deposits and savings accounts
Liabilities
Deposits	(5,469)	(5,003)
Carrying Value | Certificates of deposit
Liabilities
Deposits	(2,208)	(1,494)
Carrying Value | Wholesale deposits
Liabilities
Deposits	(653)	(43)
Carrying Value | Government deposits
Liabilities
Deposits	(1,466)	(1,073)
Carrying Value | Custodial deposits
Liabilities
Deposits	(1,793)	(1,321)
Estimated Fair Value
Assets
Cash and cash equivalents	264	204
Investment securities available-for-sale	1,857	1,853
Investment securities held-to-maturity	690	924
Loans held-for-sale	4,836	4,322
Loans held-for-investment	8,839	7,667
Loans with government guarantees	274	261
Mortgage servicing rights	313	291
Federal Home Loan Bank stock	303	303
Bank owned life insurance	338	330
Repossessed assets	7	8
Other assets, foreclosure claims	58	84
Derivative financial instruments, assets	62	39
Liabilities
Federal Home Loan Bank advances	(4,463)	(5,662)
Long-term debt	(459)	(417)
DOJ litigation settlement	(60)	(60)
Contingent consideration	(11)	(25)
Derivative financial instruments, liabilities	(20)	(11)
Estimated Fair Value | Demand deposits and savings accounts
Liabilities
Deposits	(4,891)	(4,557)
Estimated Fair Value | Certificates of deposit
Liabilities
Deposits	(2,199)	(1,498)
Estimated Fair Value | Wholesale deposits
Liabilities
Deposits	(651)	(43)
Estimated Fair Value | Government deposits
Liabilities
Deposits	(1,421)	(1,048)
Estimated Fair Value | Custodial deposits
Liabilities
Deposits	(1,709)	(1,311)
Estimated Fair Value | Level 1
Assets
Cash and cash equivalents	264	204
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, assets	0	0
Liabilities
Federal Home Loan Bank advances	0	0
Long-term debt	0	0
DOJ litigation settlement	0	0
Contingent consideration	0	0
Derivative financial instruments, liabilities	0	0
Estimated Fair Value | Level 1 | Demand deposits and savings accounts
Liabilities
Deposits	0	0
Estimated Fair Value | Level 1 | Certificates of deposit
Liabilities
Deposits	0	0
Estimated Fair Value | Level 1 | Wholesale deposits
Liabilities
Deposits	0	0
Estimated Fair Value | Level 1 | Government deposits
Liabilities
Deposits	0	0
Estimated Fair Value | Level 1 | Custodial deposits
Liabilities
Deposits	0	0
Estimated Fair Value | Level 2
Assets
Cash and cash equivalents	0	0
Investment securities available-for-sale	1,857	1,853
Investment securities held-to-maturity	690	924
Loans held-for-sale	4,836	4,322
Loans held-for-investment	8	8
Loans with government guarantees	274	261
Mortgage servicing rights	0	0
Federal Home Loan Bank stock	303	303
Bank owned life insurance	338	330
Repossessed assets	0	0
Other assets, foreclosure claims	58	84
Derivative financial instruments, assets	42	15
Liabilities
Federal Home Loan Bank advances	(4,463)	(5,662)
Long-term debt	(459)	(417)
DOJ litigation settlement	0	0
Contingent consideration	0	0
Derivative financial instruments, liabilities	(19)	(11)
Estimated Fair Value | Level 2 | Demand deposits and savings accounts
Liabilities
Deposits	(4,891)	(4,557)
Estimated Fair Value | Level 2 | Certificates of deposit
Liabilities
Deposits	(2,199)	(1,498)
Estimated Fair Value | Level 2 | Wholesale deposits
Liabilities
Deposits	(651)	(43)
Estimated Fair Value | Level 2 | Government deposits
Liabilities
Deposits	(1,421)	(1,048)
Estimated Fair Value | Level 2 | Custodial deposits
Liabilities
Deposits	(1,709)	(1,311)
Estimated 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	8,831	7,659
Loans with government guarantees	0	0
Mortgage servicing rights	313	291
Federal Home Loan Bank stock	0	0
Bank owned life insurance	0	0
Repossessed assets	7	8
Other assets, foreclosure claims	0	0
Derivative financial instruments, assets	20	24
Liabilities
Federal Home Loan Bank advances	0	0
Long-term debt	0	0
DOJ litigation settlement	(60)	(60)
Contingent consideration	(11)	(25)
Derivative financial instruments, liabilities	(1)	0
Estimated Fair Value | Level 3 | Demand deposits and savings accounts
Liabilities
Deposits	0	0
Estimated Fair Value | Level 3 | Certificates of deposit
Liabilities
Deposits	0	0
Estimated Fair Value | Level 3 | Wholesale deposits
Liabilities
Deposits	0	0
Estimated Fair Value | Level 3 | Government deposits
Liabilities
Deposits	0	0
Estimated Fair Value | Level 3 | Custodial deposits
Liabilities
Deposits	$ 0	$ 0

Fair Value Measurements (Fair_4

Fair Value Measurements (Fair Value Option Disclosures) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	$ 4,712		$ 4,712		$ 4,188
Fair Value	4,826		4,826		4,312
Fair Value Over / (Under) Unpaid Principal Balance	114		114		124
Litigation settlement
Fair Value, Option, Quantitative Disclosures [Line Items]
Litigation settlement payment amount			118
Nonperforming
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	12		12		11
Fair Value	11		11		9
Fair Value Over / (Under) Unpaid Principal Balance	(1)		(1)		(2)
Performing
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	4,700		4,700		4,177
Fair Value	4,815		4,815		4,303
Fair Value Over / (Under) Unpaid Principal Balance	115		115		126
Loans held-for-sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	4,699		4,699		4,173
Fair Value	4,815		4,815		4,300
Fair Value Over / (Under) Unpaid Principal Balance	116		116		127
Loans held-for-sale | Nonperforming
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	7		7		6
Fair Value	7		7		5
Fair Value Over / (Under) Unpaid Principal Balance	0		0		(1)
Loans held-for-sale | Performing
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	4,692		4,692		4,167
Fair Value	4,808		4,808		4,295
Fair Value Over / (Under) Unpaid Principal Balance	116		116		128
Loans held-for-investment
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	13		13		15
Fair Value	11		11		12
Fair Value Over / (Under) Unpaid Principal Balance	(2)		(2)		(3)
Loans held-for-investment | Nonperforming
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	5		5		5
Fair Value	4		4		4
Fair Value Over / (Under) Unpaid Principal Balance	(1)		(1)		(1)
Loans held-for-investment | Performing
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid Principal Balance	8		8		10
Fair Value	7		7		8
Fair Value Over / (Under) Unpaid Principal Balance	(1)		(1)		(2)
Litigation settlement
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Contractual Principal Outstanding, Liabilities	(118)		(118)		(118)
Long-term Debt, Fair Value	(60)		(60)		(60)
Fair Value, Option, Aggregate Differences, Long-term Debt Instruments	58		58		$ 58
Net gain on loan sales | Loans held-for-sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Changes in fair value, gain (loss)	7	$ 92	(61)	$ 260
Other noninterest income | Loans held-for-investment
Fair Value, Option, Quantitative Disclosures [Line Items]
Changes in fair value, gain (loss)	$ 0	$ 0	$ 0	$ 1

Segment Information (Details)

Segment Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)segment	Sep. 30, 2017USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment			3
Summary of Operations
Net interest income	$ 124	$ 103	$ 345	$ 283
Net gain (loss) on loan sales	43	75	166	189
Other noninterest income	64	55	175	157
Total net interest income and noninterest income	231	233	686	629
(Provision) benefit for loan losses	2	(2)	3	(4)
Compensation and benefits	(76)	(76)	(236)	(219)
Other noninterest expense and directly allocated overhead	(97)	(95)	(287)	(246)
Total noninterest expense	(173)	(171)	(523)	(465)
Income before income taxes	60	60	166	160
Provision for income taxes	12	20	33	52
Overhead allocations	0	0	0	0
Net income	48	40	133	108
Average balances
Loans held-for-sale	4,393	4,476	4,265	4,014
Loans with government guarantees	292	264	288	300
Loans held-for-investment	8,908	6,828	8,288	6,237
Total assets	18,611	16,439	17,834	15,406
Deposits	11,336	9,005	10,381	8,847
Intersegment Eliminations
Summary of Operations
Total net interest income and noninterest income	0	0	0	0
Community Banking
Summary of Operations
Net interest income	81	63	231	171
Net gain (loss) on loan sales	(3)	(4)	(10)	(7)
Other noninterest income	10	8	27	22
Total net interest income and noninterest income	88	67	248	186
(Provision) benefit for loan losses	(1)	(1)	(2)	(3)
Compensation and benefits	(17)	(15)	(51)	(46)
Other noninterest expense and directly allocated overhead	(27)	(25)	(81)	(67)
Total noninterest expense	(44)	(40)	(132)	(113)
Income before income taxes	43	26	114	70
Provision for income taxes	7	6	18	14
Overhead allocations	(9)	(10)	(29)	(30)
Net income	27	10	67	26
Average balances
Loans held-for-sale	10	14	11	16
Loans with government guarantees	0	0	0	0
Loans held-for-investment	8,868	6,789	8,250	6,201
Total assets	9,028	6,843	8,425	6,262
Deposits	9,170	7,498	8,581	7,438
Community Banking | Intersegment Eliminations
Summary of Operations
Total net interest income and noninterest income	1	(4)	(1)	(5)
Mortgage Originations
Summary of Operations
Net interest income	36	34	100	96
Net gain (loss) on loan sales	46	79	176	196
Other noninterest income	30	27	76	77
Total net interest income and noninterest income	112	140	352	369
(Provision) benefit for loan losses	0	(1)	(1)	(3)
Compensation and benefits	(26)	(28)	(83)	(72)
Other noninterest expense and directly allocated overhead	(41)	(49)	(129)	(114)
Total noninterest expense	(67)	(77)	(212)	(186)
Income before income taxes	45	62	139	180
Provision for income taxes	6	16	18	47
Overhead allocations	(16)	(15)	(51)	(46)
Net income	23	31	70	87
Average balances
Loans held-for-sale	4,383	4,462	4,254	3,998
Loans with government guarantees	292	264	288	300
Loans held-for-investment	11	10	9	7
Total assets	5,676	5,743	5,477	5,307
Deposits	0	0	0	0
Mortgage Originations | Intersegment Eliminations
Summary of Operations
Total net interest income and noninterest income	4	2	6	3
Mortgage Servicing
Summary of Operations
Net interest income	2	4	5	9
Net gain (loss) on loan sales	0	0	0	0
Other noninterest income	24	14	65	47
Total net interest income and noninterest income	26	18	70	56
(Provision) benefit for loan losses	0	0	0	0
Compensation and benefits	(4)	(4)	(13)	(12)
Other noninterest expense and directly allocated overhead	(18)	(13)	(49)	(45)
Total noninterest expense	(22)	(17)	(62)	(57)
Income before income taxes	4	1	8	(1)
Provision for income taxes	0	(1)	(2)	(6)
Overhead allocations	(5)	(6)	(15)	(17)
Net income	(1)	(4)	(5)	(12)
Average balances
Loans held-for-sale	0	0	0	0
Loans with government guarantees	0	0	0	0
Loans held-for-investment	0	0	0	0
Total assets	29	30	30	36
Deposits	2,072	1,507	1,800	1,409
Mortgage Servicing | Intersegment Eliminations
Summary of Operations
Total net interest income and noninterest income	5	5	14	14
Other
Summary of Operations
Net interest income	5	2	9	7
Net gain (loss) on loan sales	0	0	0	0
Other noninterest income	0	6	7	11
Total net interest income and noninterest income	5	8	16	18
(Provision) benefit for loan losses	3	0	6	2
Compensation and benefits	(29)	(29)	(89)	(89)
Other noninterest expense and directly allocated overhead	(11)	(8)	(28)	(20)
Total noninterest expense	(40)	(37)	(117)	(109)
Income before income taxes	(32)	(29)	(95)	(89)
Provision for income taxes	(1)	(1)	(1)	(3)
Overhead allocations	30	31	95	93
Net income	(1)	3	1	7
Average balances
Loans held-for-sale	0	0	0	0
Loans with government guarantees	0	0	0	0
Loans held-for-investment	29	29	29	29
Total assets	3,878	3,823	3,902	3,801
Deposits	94	0	0	0
Other | Intersegment Eliminations
Summary of Operations
Total net interest income and noninterest income	$ (10)	$ (3)	$ (19)	$ (12)

Recently Issued Accounting Pr_4

Recently Issued Accounting Pronouncements - Disaggregate Revenue (Details) - Community Banking - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition
Revenue	$ 8	$ 8	$ 23	$ 20
Deposit account and other banking income
Revenue, Initial Application Period Cumulative Effect Transition
Revenue	4	4	12	11
Interchange fees | Deposit fees and charges
Revenue, Initial Application Period Cumulative Effect Transition
Revenue	1	1	3	3
Interchange fees | Other noninterest income
Revenue, Initial Application Period Cumulative Effect Transition
Revenue	0	1	1	1
Wealth management
Revenue, Initial Application Period Cumulative Effect Transition
Revenue	$ 3	$ 2	$ 7	$ 5

Recently Issued Accounting Pr_5

Recently Issued Accounting Pronouncements - Narratives (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounting Policies [Abstract]
Merchant fee income (less than)	$ 1	$ 1	$ 1	$ 1
HTM securities transferred to AFS			$ 144