The Bank of New York Mellon Corporation (BK) 10-Q 8 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	3 Months Ended
	Mar. 31, 2017shares
Documentand Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Trading Symbol	BK
Entity Registrant Name	Bank of New York Mellon CORP
Entity Central Index Key	1,390,777
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding (shares)	1,039,877,020

Consolidated Income Statement

Consolidated Income Statement - USD ($) shares in Thousands, $ in Millions		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Investment services fees:
Asset servicing		$ 1,063	$ 1,068	$ 1,040
Clearing services		376	355	350
Issuer services		251	211	244
Treasury services		139	140	131
Total investment services fees		1,829	1,774	1,765
Investment management and performance fees		842	848	812
Foreign exchange and other trading revenue		164	161	175
Financing-related fees		55	50	54
Distribution and servicing		41	41	39
Investment and other income		77	70	105
Total fee revenue		3,008	2,944	2,950
Net securities gains — including other-than-temporary impairment		10	12	19
Noncredit-related portion of other-than-temporary impairment (recognized in other comprehensive income)		0	2	(1)
Net securities gains		10	10	20
Total fee and other revenue		3,018	2,954	2,970
Operations of consolidated investment management funds
Investment income (loss)		37	8	(3)
Interest of investment management fund note holders		4	3	3
Income (loss) from consolidated investment management funds		33	5	(6)
Net interest revenue
Interest revenue		960	928	883
Interest expense		168	97	117
Net interest revenue		792	831	766
Total revenue		3,843	3,790	3,730
Provision for credit losses		(5)	7	10
Noninterest expense
Staff		1,472	1,395	1,459
Professional, legal and other purchased services		312	325	278
Software		166	177	154
Net occupancy		136	153	142
Distribution and servicing		100	98	100
Sub-custodian		64	57	59
Bank assessment charges	[1]	57	53	53
Furniture and equipment		57	60	65
Business development		51	71	57
Other	[1]	167	175	188
Amortization of intangible assets		52	60	57
Merger and integration, litigation and restructuring charges		8	7	17
Total noninterest expense		2,642	2,631	2,629
Income
Income before income taxes		1,206	1,152	1,091
Provision for income taxes		269	280	283
Net income		937	872	808
Net (income) loss attributable to noncontrolling interests (includes $(18), $(4) and $7 related to consolidated investment management funds, respectively)		(15)	(2)	9
Net income applicable to shareholders of The Bank of New York Mellon Corporation		922	870	817
Preferred stock dividends		(42)	(48)	(13)
Net income applicable to common shareholders of The Bank of New York Mellon Corporation		880	822	804
Net income applicable to common shareholders of The Bank of New York Mellon Corporation used for the earnings per share calculation
Net income applicable to common shareholders of The Bank of New York Mellon Corporation		880	822	804
Less: Earnings allocated to participating securities		14	13	11
Net income applicable to the common shareholders of The Bank of New York Mellon Corporation after required adjustment for the calculation of basic and diluted earnings per common share		$ 866	$ 809	$ 793
Average common shares and equivalents outstanding of The Bank of New York Mellon Corporation
Basic (shares)		1,041,158	1,050,888	1,079,641
Common stock equivalents (shares)		17,886	16,643	14,963
Less: Participating securities (shares)		(11,298)	(10,713)	(9,320)
Diluted (shares)		1,047,746	1,056,818	1,085,284
Anti-dilutive securities (shares)	[2]	17,359	22,770	33,720
Earnings per share applicable to the common shareholders of The Bank of New York Mellon Corporation
Basic (usd per share)	[3]	$ 0.83	$ 0.77	$ 0.73
Diluted (usd per share)	[3]	$ 0.83	$ 0.77	$ 0.73
[1]	In the first quarter of 2017, we began disclosing bank assessment charges on a quarterly basis. The bank assessment charges were previously included in other expense. All prior periods were reclassified.
[2]	Represents stock options, restricted stock, restricted stock units and participating securities outstanding but not included in the computation of diluted average common shares because their effect would be anti-dilutive.
[3]	Basic and diluted earnings per share under the two-class method are determined on the net income applicable to common shareholders of The Bank of New York Mellon Corporation reported on the income statement less earnings allocated to participating securities.

Consolidated Income Statement (

Consolidated Income Statement (unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Net (income) loss attributable to noncontrolling interests	$ (15)	$ (2)	$ 9
Investment Management
Net (income) loss attributable to noncontrolling interests	$ (18)	$ (4)	$ 7

Consolidated Comprehensive Inco

Consolidated Comprehensive Income Statement - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Other comprehensive income		$ 241	$ (980)	$ 210
Net income		937	872	808
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments		125	(417)	37
Unrealized gain (loss) on assets available-for-sale:
Unrealized gain (loss) arising during the period		94	(469)	163
Reclassification adjustment		(6)	(6)	(15)
Total unrealized gain (loss) on assets available-for-sale		88	(475)	148
Defined benefit plans:
Net gain (loss) arising during the period		2	(110)	2
Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost		18	14	15
Total defined benefit plans		20	(96)	17
Net unrealized gain on cash flow hedges		10	0	3
Total other comprehensive (loss), net of tax	[1]	243	(988)	205
Total comprehensive income (loss)		1,180	(116)	1,013
Net (income) loss attributable to noncontrolling interests		(15)	(2)	9
Other comprehensive (income) loss attributable to noncontrolling interests		(2)	8	5
Comprehensive income (loss) applicable to the shareholders of The Bank of New York Mellon Corporation		$ 1,163	$ (110)	$ 1,027
[1]	Other comprehensive income (loss) attributable to The Bank of New York Mellon Corporation shareholders was $241 million for the quarter ended March 31, 2017, $(980) million for the quarter ended Dec. 31, 2016 and $210 million for the quarter ended March 31, 2016.

Consolidated Comprehensive Inc5

Consolidated Comprehensive Income Statement (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Other comprehensive income	$ 241	$ (980)	$ 210

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Securities:
Held-to-maturity (fair value of $40,066 and $40,669)		$ 40,254
Loans		60,868	$ 64,458
Allowance for loan losses		(164)	(169)
Goodwill		17,355	17,316
Intangible assets		3,549	3,598
Other assets (includes $956 and $1,339, at fair value)		21,515	20,954
Total assets		337,536	333,469
Deposits:
Total liabilities		297,705	293,889
Temporary equity
Redeemable noncontrolling interests		159	151
Permanent equity
Preferred stock – par value $0.01 per share; authorized 100,000,000 shares; issued 35,826 and 35,826 shares		3,542	3,542
Common stock – par value $0.01 per share; authorized 3,500,000,000 shares; issued 1,345,247,459 and 1,333,706,427 shares		13	13
Additional paid-in capital		26,248	25,962
Retained earnings		23,300	22,621
Accumulated other comprehensive loss, net of tax		(3,524)	(3,765)
Less: Treasury stock of 305,370,439 and 286,218,126 common shares, at cost		(10,441)	(9,562)
Total The Bank of New York Mellon Corporation shareholders’ equity		39,138	38,811
Nonredeemable noncontrolling interests of consolidated investment management funds		534	618
Total permanent equity	[1]	39,672	39,429
Total liabilities, temporary equity and permanent equity		337,536	333,469
Investment Management funds
Securities:
Trading assets		883	979
Fair value of assets		1,027	1,231
Deposits:
Financial and Nonfinancial Liabilities, Fair Value Disclosure		209	315
Operating segments
Cash and due from:
Banks		5,366	4,822
Interest-bearing deposits with the Federal Reserve and other central banks		65,086	58,041
Interest-bearing deposits with banks		14,554	15,086
Federal funds sold and securities purchased under resale agreements		25,776	25,801
Securities:
Held-to-maturity (fair value of $40,066 and $40,669)		40,254	40,905
Available-for-sale		75,580	73,822
Total securities		115,834	114,727
Trading assets		4,912	5,733
Loans		60,868	64,458
Allowance for loan losses		(164)	(169)
Net loans		60,704	64,289
Premises and equipment		1,307	1,303
Accrued interest receivable		551	568
Goodwill		17,355	17,316
Intangible assets		3,549	3,598
Other assets (includes $956 and $1,339, at fair value)		21,515	20,954
Total assets		336,509	332,238
Deposits:
Noninterest-bearing (principally U.S. offices)		79,771	78,342
Interest-bearing deposits in U.S. offices		50,991	52,049
Interest-bearing deposits in Non-U.S. offices		90,529	91,099
Total deposits		221,291	221,490
Federal funds purchased and securities sold under repurchase agreements		11,149	9,989
Trading liabilities		2,816	4,389
Payables to customers and broker-dealers		21,306	20,987
Commercial Paper		2,543	0
Other borrowed funds		1,022	754
Accrued taxes and other expenses		5,290	5,867
Other liabilities (including allowance for lending-related commitments of $112 and $112, also includes $555 and $597, at fair value)		5,733	5,635
Long-term debt (includes $364 and $363, at fair value)		26,346	24,463
Total liabilities		297,496	293,574
Operating segments | Investment Management funds
Securities:
Fair value of assets		1,027	1,231
Deposits:
Financial and Nonfinancial Liabilities, Fair Value Disclosure		$ 209	$ 315
[1]	Includes total The Bank of New York Mellon Corporation common shareholders’ equity of $35,269 million at Dec. 31, 2016 and $35,596 million at March 31, 2017.

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	100,000,000	100,000,000
Preferred stock, issued (shares)	35,826	35,826
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, authorized	3,500,000,000	3,500,000,000
Common stock, issued (shares)	1,345,247,459	1,333,706,427
Treasury stock, common shares (shares)	305,370,439	286,218,126
Operating segments
Held-to-maturity, fair value	$ 40,066	$ 40,669
Other assets	956	1,339
Other liabilities, allowance for lending related commitments	112	112
Other liabilities, fair value,	555	597
Long-term debt, fair value	$ 364	$ 363

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Operating activities
Net income	$ 937	$ 872	$ 808
Net (income) loss attributable to noncontrolling interests	(15)	(2)	9
Net income applicable to shareholders of The Bank of New York Mellon Corporation	922	870	817
Adjustments to reconcile net income to net cash (used for) provided by operating activities:
Provision for credit losses	(5)	7	10
Pension plan contributions	(5)		(10)
Depreciation and amortization	347		364
Deferred tax (benefit)	130		(10)
Net securities (gains)	(10)	(10)	(20)
Change in trading assets and liabilities	(751)		1,624
Originations of loans held-for-sale	0		(142)
Proceeds from the sales of loans originated for sale	0		199
Change in accruals and other, net	(1,861)		(1,038)
Net cash (used for) provided by operating activities	(1,233)		1,794
Investing activities
Change in interest-bearing deposits with banks	738		873
Change in interest-bearing deposits with the Federal Reserve and other central banks	(6,569)		17,927
Purchases of securities held-to-maturity	(2,896)		(1,240)
Paydowns of securities held-to-maturity	1,067		979
Maturities of securities held-to-maturity	2,469		1,831
Purchases of securities available-for-sale	(5,510)		(7,018)
Sales of securities available-for-sale	924		1,989
Paydowns of securities available-for-sale	2,023		2,032
Maturities of securities available-for-sale	1,462		3,393
Net change in loans	3,618		1,942
Sales of loans and other real estate	72		168
Change in federal funds sold and securities purchased under resale agreements	26		(2,510)
Net change in seed capital investments	72		50
Purchases of premises and equipment/capitalized software	(286)		(148)
Other, net	499		(188)
Net cash (used for) provided by investing activities	(2,291)		20,080
Financing activities
Change in deposits	(1,201)		(23,675)
Change in federal funds purchased and securities sold under repurchase agreements	1,160		(199)
Change in payables to customers and broker-dealers	311		102
Change in other borrowed funds	233		251
Change in commercial paper	2,543		0
Net proceeds from the issuance of long-term debt	2,243		997
Repayments of long-term debt	(296)		(1,200)
Proceeds from the exercise of stock options	145		42
Issuance of common stock	7		6
Treasury stock acquired	(879)		(577)
Common cash dividends paid	(201)		(186)
Preferred cash dividends paid	(42)		(13)
Other, net	9		(35)
Net cash provided by (used for) financing activities	4,032		(24,487)
Effect of exchange rate changes on cash	36		4
Change in cash and due from banks
Change in cash and due from banks	544		(2,609)
Cash and due from banks at beginning of period	4,822		6,537
Cash and due from banks at end of period	5,366	$ 4,822	3,928
Supplemental disclosures
Interest paid	211		170
Income taxes paid	100		83
Income taxes refunded	$ 1		$ 25

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity - 3 months ended Mar. 31, 2017 - USD ($) $ in Millions	Total		Preferred stock	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive (loss) income, net of tax	Treasury stock	Non- redeemable noncontrolling interests of consolidated investment management funds	Redeemable non- controlling interests/ temporary equity
Beginning Balance at Dec. 31, 2016	$ 39,429	[1]	$ 3,542	$ 13	$ 25,962	$ 22,621	$ (3,765)	$ (9,562)	$ 618	$ 151
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued to shareholders of noncontrolling interests										13
Redemption of subsidiary shares from noncontrolling interests										(15)
Other net changes in noncontrolling interests	(108)				(6)				(102)	11
Net income (loss)	940					922			18	(3)
Other comprehensive income	241						241			2
Dividends:
Common stock	(201)					(201)
Preferred stock	(42)					(42)
Repurchase of common stock	(879)							(879)
Common stock issued under:
Employee benefit plans	9				9
Direct stock purchase and dividend reinvestment plan	5				5
Stock awards and options exercised	278				278
Ending Balance at Mar. 31, 2017	$ 39,672	[1]	$ 3,542	$ 13	$ 26,248	$ 23,300	$ (3,524)	$ (10,441)	$ 534	$ 159
[1]	Includes total The Bank of New York Mellon Corporation common shareholders’ equity of $35,269 million at Dec. 31, 2016 and $35,596 million at March 31, 2017.

Consolidated Statement of Cha10

Consolidated Statement of Changes in Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
The Bank of New York Mellon Corporation shareholders’ equity	$ 39,138	$ 38,811
Dividends on common stock, cash paid (dollars per share)	$ 0.19
Common stock
The Bank of New York Mellon Corporation shareholders’ equity	$ 35,596	$ 35,269

Basis of presentation

Basis of presentation	3 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation Basis of presentation The accounting and financial reporting policies of BNY Mellon, a global financial services company, conform to U.S. generally accepted accounting principles (“GAAP”) and prevailing industry practices. The accompanying consolidated financial statements are unaudited. In the opinion of management, all adjustments necessary for a fair presentation of financial position, results of operations and cash flows for the periods presented have been made. These financial statements should be read in conjunction with BNY Mellon’s Annual Report on Form 10-K for the year ended Dec. 31, 2016 . Certain immaterial reclassifications have been made to prior periods to place them on a basis comparable with current period presentation. Use of estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates based upon assumptions about future economic and market conditions which affect reported amounts and related disclosures in our financial statements. Although our current estimates contemplate current conditions and how we expect them to change in the future, it is reasonably possible that actual conditions could be worse than anticipated in those estimates, which could materially affect our results of operations and financial condition. Amounts subject to estimates are items such as the allowance for loan losses and lending-related commitments, the fair value of financial instruments and derivatives, other-than-temporary impairment, goodwill and other intangibles and pension accounting. Among other effects, such changes in estimates could result in future impairments of investment securities, goodwill and intangible assets and establishment of allowances for loan losses and lending-related commitments as well as changes in pension and post-retirement expense.

Accounting change and new accou

Accounting change and new accounting guidance	3 Months Ended
	Mar. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Accounting change and new accounting guidance	Accounting change and new accounting guidance ASU 2016-09, Compensation – Stock Compensation In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation . This ASU simplifies several aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The adoption of this ASU results in increased volatility to the Company’s income tax expense. The income tax volatility is dependent on the Company’s stock price at dates restricted stock units vest, which occur on award vesting dates primarily in the first quarter of each year, and when employees choose to exercise stock options. The Company adopted this ASU effective Jan. 1, 2017. As a result of applying this ASU, in the first quarter of 2017, we recorded an income tax benefit of approximately $32 million , or $0.03 per common share, related to the annual vesting of stock awards and our stock price appreciating above the awards’ original grant price. Our effective tax rate in the first quarter of 2017 also benefited by approximately 3% . We also determined that we will continue applying the accounting policy election to estimate forfeitures. Additionally, we are reporting excess tax benefits as operating activities on the statement of cash flows on a prospective basis and the employee taxes paid will continue to be reported as financing activities.

Acquisitions and dispositions

Acquisitions and dispositions	3 Months Ended
	Mar. 31, 2017
Business Acquisitions and Dispositions [Abstract]
Acquisitions and dispositions	Acquisitions and dispositions We sometimes structure our acquisitions with both an initial payment and later contingent payments tied to post-closing revenue or income growth. There were no contingent payments in the first quarter of 2017 . At March 31, 2017 , we are potentially obligated to pay additional consideration which, using reasonable assumptions, could range from $0 million to $18 million over the next two years , but could be higher as certain of the arrangements do not contain a contractual maximum. The acquisition described below did not have a material impact on BNY Mellon’s results of operations. Acquisition in 2016 On April 1, 2016 , BNY Mellon acquired the assets of Atherton Lane Advisers, LLC, a U.S.-based investment manager with approximately $2.45 billion in AUM and servicer for approximately 700 high net worth clients, for cash of $38 million , plus contingent payments measured at $22 million . Goodwill related to this acquisition totaled $29 million and is included in the Investment Management business. The customer relationship intangible asset related to this acquisition is included in the Investment Management business, with an estimated life of 14 years , and totaled $30 million at acquisition.

Securities

Securities	3 Months Ended
	Mar. 31, 2017
Securities [Abstract]
Securities	Securities The following tables present the amortized cost, the gross unrealized gains and losses and the fair value of securities at March 31, 2017 and Dec. 31, 2016 . Securities at March 31, 2017 Gross unrealized Amortized cost Fair value (in millions) Gains Losses Available-for-sale: U.S. Treasury $ 15,692 $ 133 $ 158 $ 15,667 U.S. government agencies 357 1 7 351 State and political subdivisions 3,294 54 43 3,305 Agency RMBS 22,912 142 320 22,734 Non-agency RMBS 577 30 10 597 Other RMBS 454 4 7 451 Commercial MBS 913 7 9 911 Agency commercial MBS 7,148 36 73 7,111 CLOs 2,561 9 — 2,570 Other asset-backed securities 1,454 5 3 1,456 Foreign covered bonds 2,052 22 7 2,067 Corporate bonds 1,361 20 15 1,366 Sovereign debt/sovereign guaranteed 11,976 218 23 12,171 Other debt securities 2,659 18 8 2,669 Equity securities 2 1 — 3 Money market funds 853 — — 853 Non-agency RMBS (a) 1,016 287 5 1,298 Total securities available-for-sale (b) $ 75,281 $ 987 $ 688 $ 75,580 Held-to-maturity: U.S. Treasury $ 10,596 $ 20 $ 37 $ 10,579 U.S. government agencies 1,614 — 6 1,608 State and political subdivisions 18 — 1 17 Agency RMBS 25,132 85 271 24,946 Non-agency RMBS 71 4 2 73 Other RMBS 136 — 4 132 Commercial MBS 7 — — 7 Agency commercial MBS 829 2 10 821 Foreign covered bonds 75 2 — 77 Sovereign debt/sovereign guaranteed 1,750 31 1 1,780 Other debt securities 26 — — 26 Total securities held-to-maturity $ 40,254 $ 144 $ 332 $ 40,066 Total securities $ 115,535 $ 1,131 $ 1,020 $ 115,646 (a) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (b) Includes gross unrealized gains of $59 million and gross unrealized losses of $179 million recorded in accumulated other comprehensive income related to investment securities that were transferred from available-for-sale to held-to-maturity. The unrealized gains and losses are primarily related to Agency RMBS and will be amortized into net interest revenue over the contractual lives of the securities. Securities at Dec. 31, 2016 Gross Amortized cost Fair value (in millions) Gains Losses Available-for-sale: U.S. Treasury $ 14,373 $ 115 $ 181 $ 14,307 U.S. government agencies 366 2 9 359 State and political subdivisions 3,392 38 52 3,378 Agency RMBS 22,929 148 341 22,736 Non-agency RMBS 620 31 13 638 Other RMBS 517 4 8 513 Commercial MBS 931 8 11 928 Agency commercial MBS 6,505 28 84 6,449 CLOs 2,593 6 1 2,598 Other asset-backed securities 1,729 4 6 1,727 Foreign covered bonds 2,126 24 9 2,141 Corporate bonds 1,391 22 17 1,396 Sovereign debt/sovereign guaranteed 12,248 261 20 12,489 Other debt securities 1,952 19 10 1,961 Equity securities 2 1 — 3 Money market funds 842 — — 842 Non-agency RMBS (a) 1,080 286 9 1,357 Total securities available-for-sale (b) $ 73,596 $ 997 $ 771 $ 73,822 Held-to-maturity: U.S. Treasury $ 11,117 $ 22 $ 41 $ 11,098 U.S. government agencies 1,589 — 6 1,583 State and political subdivisions 19 — 1 18 Agency RMBS 25,221 57 299 24,979 Non-agency RMBS 78 4 2 80 Other RMBS 142 — 4 138 Commercial MBS 7 — — 7 Agency commercial MBS 721 1 10 712 Foreign covered bonds 74 1 — 75 Sovereign debt/sovereign guaranteed 1,911 42 — 1,953 Other debt securities 26 — — 26 Total securities held-to-maturity $ 40,905 $ 127 $ 363 $ 40,669 Total securities $ 114,501 $ 1,124 $ 1,134 $ 114,491 (a) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (b) Includes gross unrealized gains of $62 million and gross unrealized losses of $190 million recorded in accumulated other comprehensive income related to investment securities that were transferred from available-for-sale to held-to-maturity. The unrealized gains and losses are primarily related to Agency RMBS and will be amortized into net interest revenue over the contractual lives of the securities. The following table presents the gross securities gains, losses and impairments. Net securities gains (losses) (in millions) 1Q17 4Q16 1Q16 Realized gross gains $ 11 $ 15 $ 22 Realized gross losses — (3 ) — Recognized gross impairments (1 ) (2 ) (2 ) Total net securities gains $ 10 $ 10 $ 20 Temporarily impaired securities At March 31, 2017 , the unrealized losses on the investment securities portfolio were primarily attributable to an increase in interest rates from date of purchase, and for certain securities that were transferred from available-for-sale to held-to-maturity, an increase in interest rates through the date they were transferred. Specifically, $179 million of the unrealized losses at March 31, 2017 and $190 million at Dec. 31, 2016 reflected in the available-for-sale sections of the tables below relate to certain securities (primarily Agency RMBS) that were transferred in prior periods from available-for-sale to held-to-maturity. The unrealized losses will be amortized into net interest revenue over the contractual lives of the securities. The transfer created a new cost basis for the securities. As a result, if these securities have experienced unrealized losses since the date of transfer, the corresponding fair value and unrealized losses would be reflected in the held-to-maturity sections of the following tables. We do not intend to sell these securities and it is not more likely than not that we will have to sell these securities. The following tables show the aggregate related fair value of investments with a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 months or more at March 31, 2017 and Dec. 31, 2016 . Temporarily impaired securities at March 31, 2017 Less than 12 months 12 months or more Total (in millions) Fair Unrealized Fair Unrealized Fair Unrealized Available-for-sale: U.S. Treasury $ 9,290 $ 158 $ — $ — $ 9,290 $ 158 U.S. government agencies 300 7 — — 300 7 State and political subdivisions 593 24 129 19 722 43 Agency RMBS 13,412 132 1,771 188 15,183 320 Non-agency RMBS 27 — 319 10 346 10 Other RMBS 7 — 148 7 155 7 Commercial MBS 360 7 149 2 509 9 Agency commercial MBS 2,542 65 651 8 3,193 73 Other asset-backed securities 243 — 182 3 425 3 Corporate bonds 562 15 8 — 570 15 Sovereign debt/sovereign guaranteed 1,488 23 57 — 1,545 23 Non-agency RMBS (a) 31 1 36 4 67 5 Other debt securities 853 8 25 — 878 8 Foreign covered bonds 773 7 — — 773 7 Total securities available-for-sale (b) $ 30,481 $ 447 $ 3,475 $ 241 $ 33,956 $ 688 Held-to-maturity: U.S. Treasury $ 8,166 $ 37 $ — $ — $ 8,166 $ 37 U.S. government agencies 1,558 6 — — 1,558 6 State and political subdivisions — — 4 1 4 1 Agency RMBS 19,369 268 177 3 19,546 271 Non-agency RMBS 3 — 45 2 48 2 Agency commercial MBS 558 10 — — 558 10 Sovereign debt/sovereign guaranteed 156 1 — — 156 1 Other RMBS — — 110 4 110 4 Total securities held-to-maturity $ 29,810 $ 322 $ 336 $ 10 $ 30,146 $ 332 Total temporarily impaired securities $ 60,291 $ 769 $ 3,811 $ 251 $ 64,102 $ 1,020 (a) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (b) Gross unrealized losses for 12 months or more of $179 million were recorded in accumulated other comprehensive income and related to investment securities that were transferred from available-for-sale to held-to-maturity. The unrealized losses are primarily related to Agency RMBS and will be amortized into net interest revenue over the contractual lives of the securities. There were no gross unrealized losses for less than 12 months. Temporarily impaired securities at Dec. 31, 2016 Less than 12 months 12 months or more Total (in millions) Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses Available-for-sale: U.S. Treasury $ 8,489 $ 181 $ — $ — $ 8,489 $ 181 U.S. government agencies 257 9 — — 257 9 State and political subdivisions 1,058 33 131 19 1,189 52 Agency RMBS 14,766 141 1,673 200 16,439 341 Non-agency RMBS 21 — 332 13 353 13 Other RMBS 26 — 136 8 162 8 Commercial MBS 302 7 163 4 465 11 Agency commercial MBS 3,570 78 589 6 4,159 84 CLOs 443 1 404 — 847 1 Other asset-backed securities 276 1 357 5 633 6 Corporate bonds 594 16 7 1 601 17 Sovereign debt/sovereign guaranteed 1,521 20 63 — 1,584 20 Non-agency RMBS (a) 25 — 47 9 72 9 Other debt securities 742 10 50 — 792 10 Foreign covered bonds 712 9 — — 712 9 Total securities available-for-sale (b) $ 32,802 $ 506 $ 3,952 $ 265 $ 36,754 $ 771 Held-to-maturity: U.S. Treasury $ 6,112 $ 41 $ — $ — $ 6,112 $ 41 U.S. government agencies 1,533 6 — — 1,533 6 State and political subdivisions — — 4 1 4 1 Agency RMBS 19,498 297 102 2 19,600 299 Non-agency RMBS 4 — 48 2 52 2 Agency commercial MBS 621 10 — — 621 10 Other RMBS 15 — 123 4 138 4 Total securities held-to-maturity $ 27,783 $ 354 $ 277 $ 9 $ 28,060 $ 363 Total temporarily impaired securities $ 60,585 $ 860 $ 4,229 $ 274 $ 64,814 $ 1,134 (a) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (b) Includes gross unrealized losses for 12 months or more of $190 million recorded in accumulated other comprehensive income related to investment securities that were transferred from available-for-sale to held-to-maturity. The unrealized losses are primarily related to Agency RMBS and will be amortized into net interest revenue over the contractual lives of the securities. There were no gross unrealized losses for less than 12 months. The following table shows the maturity distribution by carrying amount and yield (on a tax equivalent basis) of our investment securities portfolio at March 31, 2017 . Maturity distribution and yield on investment securities at March 31, 2017 U.S. Treasury U.S. government agencies State and political subdivisions Other bonds, notes and debentures Mortgage/ asset-backed and equity securities (dollars in millions) Amount Yield (a) Amount Yield (a) Amount Yield (a) Amount Yield (a) Amount Yield (a) Total Securities available-for-sale: One year or less $ 2,934 0.98 % $ — — % $ 276 2.55 % $ 3,580 0.94 % $ — — % $ 6,790 Over 1 through 5 years 5,057 1.51 114 1.30 1,732 2.98 12,348 1.02 — — 19,251 Over 5 through 10 years 4,302 1.88 237 2.35 1,085 3.52 2,177 1.09 — — 7,801 Over 10 years 3,374 3.11 — — 212 2.04 168 1.67 — — 3,754 Mortgage-backed securities — — — — — — — — 33,102 2.75 33,102 Asset-backed securities — — — — — — — — 4,026 2.10 4,026 Equity securities (b) — — — — — — — — 856 — 856 Total $ 15,667 1.86 % $ 351 2.01 % $ 3,305 3.06 % $ 18,273 1.02 % $ 37,984 2.62 % $ 75,580 Securities held-to-maturity: One year or less $ 3,999 0.89 % $ 475 0.91 % $ — — % $ 438 0.62 % $ — — % $ 4,912 Over 1 through 5 years 5,092 1.47 1,089 1.23 1 7.06 752 0.62 — — 6,934 Over 5 through 10 years 1,505 1.94 50 2.02 3 6.71 661 0.71 — — 2,219 Over 10 years — — — — 14 5.34 — — — — 14 Mortgage-backed securities — — — — — — — — 26,175 2.75 26,175 Total $ 10,596 1.32 % $ 1,614 1.16 % $ 18 5.69 % $ 1,851 0.65 % $ 26,175 2.75 % $ 40,254 (a) Yields are based upon the amortized cost of securities. (b) Includes money market funds. Other-than-temporary impairment We routinely conduct periodic reviews of all securities to determine whether OTTI has occurred. Such reviews may incorporate the use of economic models. Various inputs to the economic models are used to determine if an unrealized loss on securities is other-than-temporary. For example, the most significant inputs related to non-agency RMBS are: • Default rate - the number of mortgage loans expected to go into default over the life of the transaction, which is driven by the roll rate of loans in each performance bucket that will ultimately migrate to default; and • Severity - the loss expected to be realized when a loan defaults. To determine if an unrealized loss is other-than-temporary, we project total estimated defaults of the underlying assets (mortgages) and multiply that calculated amount by an estimate of realizable value upon sale of these assets in the marketplace (severity) in order to determine the projected collateral loss. In determining estimated default rate and severity assumptions, we review the performance of the underlying securities, industry studies, market forecasts, as well as our view of the economic outlook affecting collateral. We also evaluate the current credit enhancement underlying the bond to determine the impact on cash flows. If we determine that a given security will be subject to a write-down or loss, we record the expected credit loss as a charge to earnings. The table below shows the projected weighted-average default rates and loss severities for the 2007, 2006 and late 2005 non-agency RMBS and the securities previously held in the Grantor Trust that we established in connection with the restructuring of our investment securities portfolio in 2009, at March 31, 2017 and Dec. 31, 2016 . Projected weighted-average default rates and loss severities March 31, 2017 Dec. 31, 2016 Default rate Severity Default rate Severity Alt-A 30 % 54 % 30 % 54 % Subprime 49 % 67 % 49 % 70 % Prime 18 % 39 % 18 % 39 % The following table presents pre-tax net securities gains (losses) by type. Net securities gains (losses) (in millions) 1Q17 4Q16 1Q16 Agency RMBS $ 1 $ — $ 8 Non-agency RMBS (1 ) 7 (2 ) Other 10 3 14 Total net securities gains $ 10 $ 10 $ 20 The following table reflects investment securities credit losses recorded in earnings. The beginning balance represents the credit loss component for which OTTI occurred on debt securities in prior periods. The additions represent the first time a debt security was credit impaired or when subsequent credit impairments have occurred. The deductions represent credit losses on securities that have been sold, are required to be sold, or for which it is our intention to sell. Debt securities credit loss roll forward (in millions) 1Q17 1Q16 Beginning balance as of Jan.1 $ 88 $ 91 Add: Initial OTTI credit losses — — Subsequent OTTI credit losses 1 2 Less: Realized losses for securities sold — — Ending balance as of March 31 $ 89 $ 93 Pledged assets At March 31, 2017 , BNY Mellon had pledged assets of $100 billion , including $84 billion pledged as collateral for potential borrowings at the Federal Reserve Discount Window. The components of the assets pledged at March 31, 2017 included $85 billion of securities, $8 billion of loans, $5 billion of interest-bearing deposits with banks and $2 billion of trading assets. If there has been no borrowing at the Federal Reserve Discount Window, the Federal Reserve generally allows banks to freely move assets in and out of their pledged assets account to sell or repledge the assets for other purposes. BNY Mellon regularly moves assets in and out of its pledged assets account at the Federal Reserve. At Dec. 31, 2016 , BNY Mellon had pledged assets of $102 billion , including $84 billion pledged as collateral for potential borrowing at the Federal Reserve Discount Window. The components of the assets pledged at Dec. 31, 2016 included $87 billion of securities, $8 billion of loans, $4 billion of interest-bearing deposits with banks and $3 billion of trading assets. At March 31, 2017 and Dec. 31, 2016 , pledged assets included $5 billion and $6 billion , respectively, for which the recipients were permitted to sell or repledge the assets delivered. We also obtain securities as collateral, including receipts under resale agreements, securities borrowed, derivative contracts and custody agreements on terms which permit us to sell or repledge the securities to others. At March 31, 2017 and Dec. 31, 2016 , the market value of the securities received that can be sold or repledged was $50 billion and $50 billion , respectively. We routinely sell or repledge these securities through delivery to third parties. As of March 31, 2017 and Dec. 31, 2016 , the market value of securities collateral sold or repledged was $23 billion and $20 billion , respectively. Restricted cash and securities Cash and securities may also be segregated under federal and other regulations or requirements. At March 31, 2017 and Dec. 31, 2016 , cash segregated under federal and other regulations or requirements was $3 billion and $3 billion , respectively. Restricted cash is included in interest-bearing deposits with banks on the consolidated balance sheet. Securities segregated for these purposes were $2 billion at March 31, 2017 and $2 billion at Dec. 31, 2016 . Restricted securities were sourced from securities purchased under resale agreements at March 31, 2017 and Dec. 31, 2016 and are included in federal funds sold and securities purchased under resale agreements on the consolidated balance sheet.

Loans and asset quality

Loans and asset quality	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Loans and asset quality	Loans and asset quality Loans The table below provides the details of our loan portfolio and industry concentrations of credit risk at March 31, 2017 and Dec. 31, 2016 . Loans March 31, 2017 Dec. 31, 2016 (in millions) Domestic: Financial institutions $ 5,387 $ 6,342 Commercial 2,543 2,286 Wealth management loans and mortgages 15,909 15,555 Commercial real estate 4,698 4,639 Lease financings 846 989 Other residential mortgages 817 854 Overdrafts 673 1,055 Other 1,119 1,202 Margin loans 16,081 17,503 Total domestic 48,073 50,425 Foreign: Financial institutions 7,954 8,347 Commercial 347 331 Wealth management loans and mortgages 114 99 Commercial real estate 19 15 Lease financings 739 736 Other (primarily overdrafts) 3,554 4,418 Margin loans 68 87 Total foreign 12,795 14,033 Total loans (a) $ 60,868 $ 64,458 (a) Net of unearned income of $511 million at March 31, 2017 and $527 million at Dec. 31, 2016 primarily on domestic and foreign lease financings. Our loan portfolio consists of three portfolio segments: commercial, lease financings and mortgages. We manage our portfolio at the class level which consists of six classes of financing receivables: commercial, commercial real estate, financial institutions, lease financings, wealth management loans and mortgages and other residential mortgages. The following tables are presented for each class of financing receivable, and provide additional information about our credit risks and the adequacy of our allowance for credit losses. Allowance for credit losses Transactions in the allowance for credit losses are summarized as follows. Allowance for credit losses activity for the quarter ended March 31, 2017 Wealth management loans and mortgages Other residential mortgages (in millions) Commercial Commercial real estate Financial institutions Lease financings All Other Foreign Total Beginning balance $ 82 $ 73 $ 26 $ 13 $ 23 $ 28 $ — $ 36 $ 281 Charge-offs — — — — — (1 ) — — (1 ) Recoveries — — — — — 1 — — 1 Net recoveries — — — — — — — — — Provision — — (3 ) (3 ) 3 (3 ) — 1 (5 ) Ending balance $ 82 $ 73 $ 23 $ 10 $ 26 $ 25 $ — $ 37 $ 276 Allowance for: Loan losses $ 24 $ 54 $ 5 $ 10 $ 22 $ 25 $ — $ 24 $ 164 Lending-related commitments 58 19 18 — 4 — — 13 112 Individually evaluated for impairment: Loan balance $ — $ — $ — $ — $ 5 $ — $ — $ — $ 5 Allowance for loan losses — — — — 3 — — — 3 Collectively evaluated for impairment: Loan balance $ 2,543 $ 4,698 $ 5,387 $ 846 $ 15,904 $ 817 $ 17,873 (a) $ 12,795 $ 60,863 Allowance for loan losses 24 54 5 10 19 25 — 24 161 (a) Includes $673 million of domestic overdrafts, $16,081 million of margin loans and $1,119 million of other loans at March 31, 2017 . Allowance for credit losses activity for the quarter ended Dec. 31, 2016 Wealth management loans and mortgages Other residential mortgages (in millions) Commercial Commercial real estate Financial institutions Lease financings All Other Foreign Total Beginning balance $ 91 $ 63 $ 29 $ 14 $ 18 $ 28 $ — $ 31 $ 274 Charge-offs — — — — — (1 ) — — (1 ) Recoveries — — — — — 1 — — 1 Net recoveries — — — — — — — — — Provision (9 ) 10 (3 ) (1 ) 5 — — 5 7 Ending balance $ 82 $ 73 $ 26 $ 13 $ 23 $ 28 $ — $ 36 $ 281 Allowance for: Loan losses $ 25 $ 52 $ 8 $ 13 $ 19 $ 28 $ — $ 24 $ 169 Lending-related commitments 57 21 18 — 4 — — 12 112 Individually evaluated for impairment: Loan balance $ — $ — $ — $ 4 $ 5 $ — $ — $ — $ 9 Allowance for loan losses — — — 2 3 — — — 5 Collectively evaluated for impairment: Loan balance $ 2,286 $ 4,639 $ 6,342 $ 985 $ 15,550 $ 854 $ 19,760 (a) $ 14,033 $ 64,449 Allowance for loan losses 25 52 8 11 16 28 — 24 164 (a) Includes $1,055 million of domestic overdrafts, $17,503 million of margin loans and $1,202 million of other loans at Dec. 31, 2016 . Allowance for credit losses activity for the quarter ended March 31, 2016 Wealth management loans and mortgages Other residential mortgages All Other Foreign Total (in millions) Commercial Commercial real estate Financial institutions Lease financings Beginning balance $ 82 $ 59 $ 31 $ 15 $ 19 $ 34 $ — $ 35 $ 275 Charge-offs — — — — — — — — — Recoveries — — — — — 2 — — 2 Net recoveries — — — — — 2 — — 2 Provision 6 3 1 1 (1 ) (4 ) — 4 10 Ending balance $ 88 $ 62 $ 32 $ 16 $ 18 $ 32 $ — $ 39 $ 287 Allowance for: Loan losses $ 25 $ 40 $ 11 $ 16 $ 15 $ 32 $ — $ 23 $ 162 Lending-related commitments 63 22 21 — 3 — — 16 125 Individually evaluated for impairment: Loan balance $ — $ 2 $ 171 $ 5 $ 8 $ — $ — $ — $ 186 Allowance for loan losses — 1 — 2 1 — — — 4 Collectively evaluated for impairment: Loan balance $ 2,130 $ 3,927 $ 5,415 $ 973 $ 13,874 $ 993 $ 20,697 (a) $ 13,044 $ 61,053 Allowance for loan losses 25 39 11 14 14 32 — 23 158 (a) Includes $917 million of domestic overdrafts, $18,674 million of margin loans and $1,106 million of other loans at March 31, 2016 . Nonperforming assets The table below presents the distribution of our nonperforming assets. Nonperforming assets (in millions) March 31, 2017 Dec. 31, 2016 Nonperforming loans: Other residential mortgages $ 88 $ 91 Wealth management loans and mortgages 10 8 Lease financings — 4 Total nonperforming loans 98 103 Other assets owned 9 4 Total nonperforming assets $ 107 $ 107 At March 31, 2017 , undrawn commitments to borrowers whose loans were classified as nonaccrual or reduced rate were not material. Lost interest The table below presents the amount of lost interest income. Lost interest (in millions) 1Q17 4Q16 1Q16 Amount by which interest income recognized on nonperforming loans exceeded reversals $ — $ — $ — Amount by which interest income would have increased if nonperforming loans at period end had been performing for the entire period $ 1 $ 1 $ 1 Impaired loans The tables below provide information about our impaired loans. We use the discounted cash flow method as the primary method for valuing impaired loans. Impaired loans Quarter ended March 31, 2017 Dec. 31, 2016 March 31, 2016 (in millions) Average recorded investment Interest Average recorded investment Interest income recognized Average recorded investment Interest income recognized Impaired loans with an allowance: Commercial real estate $ — $ — $ — $ — $ 1 $ — Wealth management loans and mortgages 3 — 2 — 6 — Lease financings 2 — 4 — 2 — Total impaired loans with an allowance 5 — 6 — 9 — Impaired loans without an allowance : Commercial real estate — — — — 1 — Financial institutions — — — — 171 — Wealth management loans and mortgages 2 — 3 — 2 — Total impaired loans without an allowance (a) 2 — 3 — 174 — Total impaired loans $ 7 $ — $ 9 $ — $ 183 $ — (a) When the discounted cash flows, collateral value or market price equals or exceeds the carrying value of the loan, then the loan does not require an allowance under the accounting standard related to impaired loans. Impaired loans March 31, 2017 Dec. 31, 2016 (in millions) Recorded investment Unpaid principal balance Related allowance (a) Recorded investment Unpaid principal balance Related allowance (a) Impaired loans with an allowance: Commercial real estate $ — $ 3 $ — $ — $ 3 $ — Wealth management loans and mortgages 3 3 3 3 3 3 Lease financings — — — 4 4 2 Total impaired loans with an allowance 3 6 3 7 10 5 Impaired loans without an allowance : Wealth management loans and mortgages 2 2 N/A 2 2 N/A Total impaired loans without an allowance (b) 2 2 N/A 2 2 N/A Total impaired loans (c) $ 5 $ 8 $ 3 $ 9 $ 12 $ 5 (a) The allowance for impaired loans is included in the allowance for loan losses. (b) When the discounted cash flows, collateral value or market price equals or exceeds the carrying value of the loan, then the loan does not require an allowance under the accounting standard related to impaired loans. (c) Excludes an aggregate of less than $1 million of impaired loans in amounts individually less than $1 million at both March 31, 2017 and Dec. 31, 2016 , respectively. The allowance for loan loss associated with these loans totaled less than $1 million at both March 31, 2017 and Dec. 31, 2016 , respectively. Past due loans The table below sets forth information about our past due loans. Past due loans and still accruing interest March 31, 2017 Dec. 31, 2016 Days past due Total past due Days past due Total past due (in millions) 30-59 60-89 >90 30-59 60-89 >90 Wealth management loans and mortgages $ 25 $ 3 $ — $ 28 $ 21 $ 2 $ — $ 23 Commercial real estate 21 — — 21 78 — — 78 Other residential mortgages 13 2 4 19 20 6 7 33 Financial institutions — — — — 1 27 — 28 Total past due loans $ 59 $ 5 $ 4 $ 68 $ 120 $ 35 $ 7 $ 162 Troubled debt restructurings (“TDRs”) A modified loan is considered a TDR if the debtor is experiencing financial difficulties and the creditor grants a concession to the debtor that would not otherwise be considered. A TDR may include a transfer of real estate or other assets from the debtor to the creditor, or a modification of the term of the loan. Not all modified loans are considered TDRs. The following table presents TDRs that occurred in the first quarter of 2017 , fourth quarter of 2016 and first quarter of 2016 . TDRs 1Q17 4Q16 1Q16 Outstanding recorded investment Outstanding recorded investment Outstanding recorded investment (dollars in millions) Number of contracts Pre-modification Post-modification Number of contracts Pre-modification Post-modification Number of contracts Pre-modification Post-modification Other residential mortgages 6 $ 2 $ 2 17 $ 3 $ 4 13 $ 3 $ 3 Wealth management loans and mortgages 1 4 4 — — — 2 — — Total TDRs 7 $ 6 $ 6 17 $ 3 $ 4 15 $ 3 $ 3 Other residential mortgages The modifications of the other residential mortgage loans in the first quarter of 2017 , fourth quarter of 2016 and first quarter of 2016 consisted of reducing the stated interest rates and, in certain cases, a forbearance of default and extending the maturity dates. The modified loans are primarily collateral dependent for which the value is based on the fair value of the collateral. TDRs that subsequently defaulted There were seven residential mortgage loans and one wealth management loan and mortgage that had been restructured in a TDR during the previous 12 months and have subsequently defaulted in the first quarter of 2017 . The total recorded investment of these loans was $2 million . Credit quality indicators Our credit strategy is to focus on investment grade clients that are active users of our non-credit services. Each customer is assigned an internal credit rating, which is mapped to an external rating agency grade equivalent, if possible, based upon a number of dimensions, which are continually evaluated and may change over time. The following tables set forth information about credit quality indicators. Commercial loan portfolio Commercial loan portfolio – Credit risk profile by creditworthiness category Commercial Commercial real estate Financial institutions March 31, Dec. 31, 2016 March 31, Dec. 31, 2016 March 31, Dec. 31, 2016 (in millions) Investment grade $ 2,697 $ 2,397 $ 3,903 $ 3,823 $ 10,255 $ 11,459 Non-investment grade 193 220 814 831 3,086 3,230 Total $ 2,890 $ 2,617 $ 4,717 $ 4,654 $ 13,341 $ 14,689 The commercial loan portfolio is divided into investment grade and non-investment grade categories based on rating criteria largely consistent with those of the public rating agencies. Each customer in the portfolio is assigned an internal credit rating. These internal credit ratings are generally consistent with the ratings categories of the public rating agencies. Customers with ratings consistent with BBB- (S&P)/Baa3 (Moody’s) or better are considered to be investment grade. Those clients with ratings lower than this threshold are considered to be non-investment grade. Wealth management loans and mortgages Wealth management loans and mortgages – Credit risk profile by internally assigned grade (in millions) March 31, Dec. 31, 2016 Wealth management loans: Investment grade $ 7,300 $ 7,127 Non-investment grade 155 260 Wealth management mortgages 8,568 8,267 Total $ 16,023 $ 15,654 Wealth management non-mortgage loans are not typically rated by external rating agencies. A majority of the wealth management loans are secured by the customers’ investment management accounts or custody accounts. Eligible assets pledged for these loans are typically investment grade fixed-income securities, equities and/or mutual funds. Internal ratings for this portion of the wealth management portfolio, therefore, would equate to investment grade external ratings. Wealth management loans are provided to select customers based on the pledge of other types of assets, including business assets, fixed assets or a modest amount of commercial real estate. For the loans collateralized by other assets, the credit quality of the obligor is carefully analyzed, but we do not consider this portfolio of loans to be investment grade. Credit quality indicators for wealth management mortgages are not correlated to external ratings. Wealth management mortgages are typically loans to high net worth individuals, which are secured primarily by residential property. These loans are primarily interest-only, adjustable rate mortgages with a weighted-average loan-to-value ratio of 61% at origination. In the wealth management portfolio, less than 1% of the mortgages were past due at March 31, 2017 . At March 31, 2017 , the wealth management mortgage portfolio consisted of the following geographic concentrations: California - 24% ; New York - 19% ; Massachusetts - 12% ; Florida - 7% ; and other - 38% . Other residential mortgages The other residential mortgage portfolio primarily consists of 1-4 family residential mortgage loans and totaled $ 817 million at March 31, 2017 and $854 million at Dec. 31, 2016 . These loans are not typically correlated to external ratings. Included in this portfolio at March 31, 2017 are $208 million of mortgage loans purchased in 2005, 2006 and the first quarter of 2007 that are predominantly prime mortgage loans, with a small portion of Alt-A loans. As of March 31, 2017 , the purchased loans in this portfolio had a weighted-average loan-to-value ratio of 76% at origination and 14% of the serviced loan balance was at least 60 days delinquent. The properties securing the prime and Alt-A mortgage loans were located (in order of concentration) in California, Florida, Virginia, the tri-state area (New York, New Jersey and Connecticut) and Maryland. Overdrafts Overdrafts primarily relate to custody and securities clearance clients and totaled $4.2 billion at March 31, 2017 and $5.5 billion at Dec. 31, 2016 . Overdrafts occur on a daily basis in the custody and securities clearance business and are generally repaid within two business days. Other loans Other loans primarily include loans to consumers that are fully collateralized with equities, mutual funds and fixed income securities. Margin loans We had $16.1 billion of secured margin loans on our balance sheet at March 31, 2017 compared with $17.6 billion at Dec. 31, 2016 . Margin loans are collateralized with marketable securities and borrowers are required to maintain a daily collateral margin in excess of 100% of the value of the loan. We have rarely suffered a loss on these types of loans and do not allocate any of our allowance for credit losses to margin loans. Reverse repurchase agreements Reverse repurchase agreements are transactions fully collateralized with high-quality liquid securities. These transactions carry minimal credit risk and therefore are not allocated an allowance for credit losses.

Goodwill and intangible assets

Goodwill and intangible assets	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and intangible assets	Goodwill and intangible assets Goodwill The tables below provide a breakdown of goodwill by business. Goodwill by business (in millions) Investment Investment Other Consolidated Balance at Dec. 31, 2016 $ 9,000 $ 8,269 $ 47 $ 17,316 Foreign currency translation 21 18 — 39 Balance at March 31, 2017 $ 9,021 $ 8,287 $ 47 $ 17,355 Goodwill by business (in millions) Investment Investment Other Consolidated Balance at Dec. 31, 2015 $ 9,207 $ 8,366 $ 45 $ 17,618 Foreign currency translation (32 ) 18 — (14 ) Balance at March 31, 2016 $ 9,175 $ 8,384 $ 45 $ 17,604 Intangible assets The tables below provide a breakdown of intangible assets by business. Intangible assets – net carrying amount by business (in millions) Investment Investment Other Consolidated Balance at Dec. 31, 2016 $ 1,717 $ 1,032 $ 849 $ 3,598 Amortization (15 ) (37 ) — (52 ) Foreign currency translation 3 — — 3 Balance at March 31, 2017 $ 1,705 $ 995 $ 849 $ 3,549 Intangible assets – net carrying amount by business (in millions) Investment Investment Other Consolidated Balance at Dec. 31, 2015 $ 1,807 $ 1,186 $ 849 $ 3,842 Amortization (19 ) (38 ) — (57 ) Foreign currency translation (6 ) 2 — (4 ) Balance at March 31, 2016 $ 1,782 $ 1,150 $ 849 $ 3,781 The table below provides a breakdown of intangible assets by type. Intangible assets March 31, 2017 Dec. 31, 2016 (in millions) Gross carrying amount Accumulated amortization Net carrying amount Remaining weighted- average amortization period Gross Accumulated Net carrying amount Subject to amortization : (a) Customer relationships—Investment Management $ 1,444 $ (1,154 ) $ 290 11 years $ 1,439 $ (1,136 ) $ 303 Customer contracts—Investment Services 2,251 (1,629 ) 622 10 years 2,249 (1,590 ) 659 Other 38 (34 ) 4 2 years 37 (33 ) 4 Total subject to amortization 3,733 (2,817 ) 916 10 years 3,725 (2,759 ) 966 Not subject to amortization: (b) Trade name 1,348 N/A 1,348 N/A 1,348 N/A 1,348 Customer relationships 1,285 N/A 1,285 N/A 1,284 N/A 1,284 Total not subject to amortization 2,633 N/A 2,633 N/A 2,632 N/A 2,632 Total intangible assets $ 6,366 $ (2,817 ) $ 3,549 N/A $ 6,357 $ (2,759 ) $ 3,598 (a) Excludes fully amortized intangible assets. (b) Intangible assets not subject to amortization have an indefinite life. Estimated annual amortization expense for current intangibles for the next five years is as follows: For the year ended Estimated amortization expense (in millions) 2017 $ 208 2018 178 2019 108 2020 98 2021 75 Impairment testing The goodwill impairment test is performed at least annually at the reporting unit level. Intangible assets not subject to amortization are tested for impairment annually or more often if events or circumstances indicate they may be impaired.

Other assets

Other assets	3 Months Ended
	Mar. 31, 2017
Other Assets [Abstract]
Other assets	Other assets The following table provides the components of other assets presented on the balance sheet. Other assets March 31, 2017 Dec. 31, 2016 (in millions) Corporate/bank-owned life insurance $ 4,806 $ 4,789 Accounts receivable 4,684 4,060 Fails to deliver 2,260 1,732 Software 1,458 1,451 Renewable energy investments 1,266 1,282 Income taxes receivable 1,214 1,172 Equity in a joint venture and other investments 1,067 1,063 Tax advantaged low income housing investments 900 914 Prepaid pension assets 874 836 Prepaid expenses 522 438 Fair value of hedging derivatives 482 784 Federal Reserve Bank stock 469 466 Seed capital 303 395 Due from customers on acceptances 129 340 Private equity 46 43 Other 1,035 1,189 Total other assets $ 21,515 $ 20,954 Certain seed capital and private equity investments valued using net asset value per share In our Investment Management business, we manage investment assets, including equities, fixed income, money market and alternative investment funds for institutions and other investors. As part of that activity, we make seed capital investments in certain funds. BNY Mellon also holds private equity investments, specifically in small business investment companies (“SBICs”), which are compliant with the Volcker Rule. Seed capital and private equity investments are included in other assets. The fair value of certain of these investments has been estimated using the NAV per share of BNY Mellon’s ownership interest in the funds. The table below presents information about BNY Mellon’s investments in seed capital and private equity investments that have been valued using NAV. Seed capital and private equity investments valued using NAV March 31, 2017 Dec. 31, 2016 (dollar amounts in millions) Fair value Unfunded commitments Redemption frequency Redemption notice period Fair value Unfunded commitments Redemption frequency Redemption notice period Seed capital and other funds (a) $ 104 $ 1 Daily-quarterly 1-95 days $ 171 $ 1 Daily-quarterly 1-180 days Private equity investments (SBICs) (b) 46 45 N/A N/A 43 46 N/A N/A Total $ 150 $ 46 $ 214 $ 47 (a) Other funds include various leveraged loans, hedge funds and structured credit funds. Redemption notice periods vary by fund. (b) Private equity investments primarily include Volcker Rule-compliant investments in SBICs that invest in various sectors of the economy. Private equity investments do not have redemption rights. Distributions from such investments will be received as the underlying investments in the private equity investments are liquidated. Qualified affordable housing project investments We invest in affordable housing projects primarily to satisfy the Company’s requirements under the Community Reinvestment Act. Our total investment in qualified affordable housing projects totaled $900 million at March 31, 2017 and $914 million at Dec. 31, 2016 . Commitments to fund future investments in qualified affordable housing projects totaled $355 million at March 31, 2017 and $369 million at Dec. 31, 2016 . A summary of the commitments to fund future investments is as follows: 2017 – $126 million ; 2018 – $132 million ; 2019 – $81 million ; 2020 – $2 million ; 2021 – $1 million ; and 2022 and thereafter – $13 million . Tax credits and other tax benefits recognized were $38 million in the first quarter 2017 , $38 million in the first quarter of 2016 and $40 million in the fourth quarter of 2016 . Amortization expense included in the provision for income taxes was $27 million in the first quarter 2017 , $28 million in the first quarter of 2016 and $29 million in the fourth quarter of 2016 .

Net interest revenue

Net interest revenue	3 Months Ended
	Mar. 31, 2017
Interest Revenue (Expense), Net [Abstract]
Net interest revenue	Net interest revenue The following table provides the components of net interest revenue presented on the consolidated income statement. Net interest revenue Quarter ended March 31, 2017 Dec. 31, 2016 March 31, 2016 (in millions) Interest revenue Non-margin loans $ 245 $ 236 $ 205 Margin loans 75 71 63 Securities: Taxable 461 465 444 Exempt from federal income taxes 17 17 18 Total securities 478 482 462 Deposits with banks 22 28 26 Deposits with the Federal Reserve and other central banks 57 28 61 Federal funds sold and securities purchased under resale agreements 67 66 49 Trading assets 16 17 17 Total interest revenue 960 928 883 Interest expense Deposits 9 (5 ) 15 Federal funds purchased and securities sold under repurchase agreements 24 8 9 Trading liabilities 2 1 2 Other borrowed funds 2 3 2 Commercial paper 5 — — Customer payables 7 3 4 Long-term debt 119 87 85 Total interest expense 168 97 117 Net interest revenue 792 831 766 Provision for credit losses (5 ) 7 10 Net interest revenue after provision for credit losses $ 797 $ 824 $ 756

Employee benefit plans

Employee benefit plans	3 Months Ended
	Mar. 31, 2017
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Employee benefit plans	Employee benefit plans The components of net periodic benefit (credit) cost are as follows. Net periodic benefit (credit) cost Quarter ended March 31, 2017 March 31, 2016 (in millions) Domestic pension benefits Foreign pension benefits Health care benefits Domestic pension benefits Foreign pension benefits Health care benefits Service cost $ — $ 7 $ — $ — $ 8 $ 1 Interest cost 45 8 2 45 9 2 Expected return on assets (81 ) (12 ) (2 ) (82 ) (13 ) (2 ) Other 17 9 (1 ) 18 4 (1 ) Net periodic benefit (credit) cost $ (19 ) $ 12 $ (1 ) $ (19 ) $ 8 $ —

Income taxes

Income taxes	3 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income taxes	Income taxes BNY Mellon recorded an income tax provision of $ 269 million ( 22.3% effective tax rate) in the first quarter of 2017 and $283 million ( 25.9% effective tax rate) in the first quarter of 2016 . The effective tax rate for the first quarter of 2017 reflects an approximate 3% benefit primarily driven by applying the new accounting guidance included in ASU 2016-09, Compensation – Stock Compensation , to the annual vesting of stock awards and our stock price appreciating above the awards’ original grant price. Our total tax reserves as of March 31, 2017 were $150 million compared with $146 million at Dec. 31, 2016 . If these tax reserves were unnecessary, $150 million would affect the effective tax rate in future periods. We recognize accrued interest and penalties, if applicable, related to income taxes in income tax expense. Included in the balance sheet at March 31, 2017 is accrued interest, where applicable, of $21 million . The additional tax expense related to interest for the three months ended March 31, 2017 was $2 million , compared with $2 million for the three months ended March 31, 2016 . It is reasonably possible the total reserve for uncertain tax positions could decrease within the next 12 months by approximately $13 million as a result of adjustments related to tax years that are still subject to examination. Our federal income tax returns are closed to examination through 2013. Our New York State, New York City and UK income tax returns are closed to examination through 2012.

Securitizations and variable in

Securitizations and variable interest entities	3 Months Ended
	Mar. 31, 2017
Securitizations And Variable Interest Entities Disclosure [Abstract]
Securitizations and variable interest entities	Securitizations and variable interest entities BNY Mellon has variable interests in VIEs, which include investments in retail, institutional and alternative investment funds, including collateralized loan obligation (“CLO”) structures in which we provide asset management services, some of which are consolidated. The investment funds are offered to our retail and institutional clients to provide them with access to investment vehicles with specific investment objectives and strategies that address the client’s investment needs. BNY Mellon earns management fees from these funds as well as performance fees in certain funds and may also provide start-up capital for its new funds. The funds are primarily financed by our customers’ investments in the funds’ equity or debt. Additionally, BNY Mellon invests in qualified affordable housing and renewable energy projects, which are designed to generate a return primarily through the realization of tax credits by the Company. The projects, which are structured as limited partnerships and LLCs, are also VIEs, but are not consolidated. The VIEs discussed above are included in the scope of ASU 2015-02, which was adopted effective Jan. 1, 2015, and are reviewed for consolidation based on the guidance in ASC 810, Consolidation . We reconsider and reassess whether or not we are the primary beneficiary of a VIE when governing documents or contractual arrangements are changed that would reallocate the obligation to absorb expected losses or receive expected residual returns between BNY Mellon and the other investors. This could occur when BNY Mellon disposes of its variable interests in the fund, when additional variable interests are issued to other investors or when we acquire additional variable interests in the VIE. The following tables present the incremental assets and liabilities included in BNY Mellon’s consolidated financial statements, after applying intercompany eliminations, as of March 31, 2017 and Dec. 31, 2016 . The net assets of any consolidated VIE are solely available to settle the liabilities of the VIE and to settle any investors’ ownership liquidation requests, including any seed capital invested in the VIE by BNY Mellon. Investments consolidated at March 31, 2017 (in millions) Investment Management funds Securitizations Total consolidated investments Available-for-sale securities $ — $ 400 $ 400 Trading assets 883 — 883 Other assets 144 — 144 Total assets $ 1,027 (a) $ 400 $ 1,427 Other liabilities $ 209 $ 364 $ 573 Total liabilities $ 209 (a) $ 364 $ 573 Nonredeemable noncontrolling interests $ 534 (a) $ — $ 534 (a) Includes voting model entities (“VMEs”) with assets of $85 million , liabilities of $1 million and nonredeemable noncontrolling interests of $14 million . Investments consolidated at Dec. 31, 2016 (in millions) Investment Management funds Securitizations Total consolidated investments Available-for-sale securities $ — $ 400 $ 400 Trading assets 979 — 979 Other assets 252 — 252 Total assets $ 1,231 (a) $ 400 $ 1,631 Trading liabilities $ 282 $ — $ 282 Other liabilities 33 363 396 Total liabilities $ 315 (a) $ 363 $ 678 Nonredeemable noncontrolling interests $ 618 (a) $ — $ 618 (a) Includes VMEs with assets of $114 million , liabilities of $3 million and nonredeemable noncontrolling interests of $25 million . BNY Mellon has not provided financial or other support that was not otherwise contractually required to be provided to our VIEs. Additionally, creditors of any consolidated VIEs do not have any recourse to the general credit of BNY Mellon. Non-consolidated VIEs As of March 31, 2017 and Dec. 31, 2016 , the following assets and liabilities related to the VIEs where BNY Mellon is not the primary beneficiary are included in our consolidated financial statements. Non-consolidated VIEs at March 31, 2017 (in millions) Assets Liabilities Maximum loss exposure Other $ 2,451 $ 355 $ 2,806 Non-consolidated VIEs at Dec. 31, 2016 (in millions) Assets Liabilities Maximum loss exposure Other $ 2,442 $ 369 $ 2,811 The maximum loss exposure indicated in the above tables relates solely to BNY Mellon’s investments in, and unfunded commitments to, the VIEs.

Preferred stock

Preferred stock	3 Months Ended
	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Preferred stock	Preferred stock BNY Mellon has 100 million authorized shares of preferred stock with a par value of $0.01 per share. The following table summarizes BNY Mellon’s preferred stock issued and outstanding at March 31, 2017 and Dec. 31, 2016 . Preferred stock summary (a) Total shares issued and outstanding Carrying value (b) (in millions) Per annum dividend rate March 31, 2017 Dec. 31, 2016 March 31, 2017 Dec. 31, 2016 Series A Greater of (i) three-month LIBOR plus 0.565% for the related distribution period; or (ii) 4.000% 5,001 5,001 $ 500 $ 500 Series C 5.2% 5,825 5,825 568 568 Series D 4.50% to but excluding June 20, 2023, then a floating rate equal to the three-month LIBOR plus 2.46% 5,000 5,000 494 494 Series E 4.95% to and including June 20, 2020, then a floating rate equal to the three-month LIBOR plus 3.42% 10,000 10,000 990 990 Series F 4.625% to and including Sept. 20, 2026, then a floating rate equal to the three-month LIBOR plus 3.131% 10,000 10,000 990 990 Total 35,826 35,826 $ 3,542 $ 3,542 (a) All outstanding preferred stock is noncumulative perpetual preferred stock with a liquidation preference of $100,000 per share. (b) The carrying value of the Series C, Series D, Series E and Series F preferred stock is recorded net of issuance costs. On March 20, 2017, The Bank of New York Mellon Corporation paid the following dividends for the noncumulative perpetual preferred stock for the dividend period ending in March 2017 to holders of record as of the close of business on March 5, 2017: • $1,000.00 per share on the Series A Preferred Stock (equivalent to $10.0000 per Normal Preferred Capital Security of Mellon Capital IV, each representing a 1/100th interest in a share of the Series A Preferred Stock); • $1,300.00 per share on the Series C Preferred Stock (equivalent to $0.3250 per depositary share, each representing a 1/4,000th interest in a share of the Series C Preferred Stock); and • $2,942.01 per share on the Series F Preferred Stock (equivalent to $29.4201 per depositary share, each representing a 1/100th interest in a share of the Series F Preferred Stock). For additional information on the preferred stock, see Note 13 of the Notes to Consolidated Financial Statements in our 2016 Annual Report. Terms of the Series A, Series C, Series D, Series E and Series F preferred stock are more fully described in each of their Certificates of Designations, each of which is filed as an Exhibit to this Form 10-Q.

Other comprehensive income (los

Other comprehensive income (loss)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Other comprehensive income (loss)	Other comprehensive income (loss) Components of other comprehensive income (loss) Quarter ended March 31, 2017 Dec. 31, 2016 March 31, 2016 (in millions) Pre-tax amount Tax (expense) benefit After-tax amount Pre-tax amount Tax (expense) benefit After-tax amount Pre-tax amount Tax (expense) benefit After-tax amount Foreign currency translation: Foreign currency translation adjustments arising during the period (a) $ 96 $ 29 $ 125 $ (295 ) $ (122 ) $ (417 ) $ 45 $ (8 ) $ 37 Total foreign currency translation 96 29 125 (295 ) (122 ) (417 ) 45 (8 ) 37 Unrealized gain (loss) on assets available-for-sale: Unrealized gain (loss) arising during period 164 (70 ) 94 (726 ) 257 (469 ) 243 (80 ) 163 Reclassification adjustment (b) (10 ) 4 (6 ) (10 ) 4 (6 ) (20 ) 5 (15 ) Net unrealized gain (loss) on assets available-for-sale 154 (66 ) 88 (736 ) 261 (475 ) 223 (75 ) 148 Defined benefit plans: Net gain (loss) arising during the period 3 (1 ) 2 (154 ) 44 (110 ) 3 (1 ) 2 Foreign exchange adjustment — — — (1 ) 1 — — — — Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost (b) 25 (7 ) 18 23 (9 ) 14 22 (7 ) 15 Total defined benefit plans 28 (8 ) 20 (132 ) 36 (96 ) 25 (8 ) 17 Unrealized gain (loss) on cash flow hedges: Unrealized hedge gain (loss) arising during period 14 (5 ) 9 63 (20 ) 43 (81 ) 27 (54 ) Reclassification adjustment (b) 1 — 1 (65 ) 22 (43 ) 86 (29 ) 57 Net unrealized gain (loss) on cash flow hedges 15 (5 ) 10 (2 ) 2 — 5 (2 ) 3 Total other comprehensive income (loss) $ 293 $ (50 ) $ 243 $ (1,165 ) $ 177 $ (988 ) $ 298 $ (93 ) $ 205 (a) Includes the impact of hedges of net investments in foreign subsidiaries. See Note 16 for additional information. (b) The reclassification adjustment related to the unrealized gain (loss) on assets available-for-sale is recorded as net securities gains on the Consolidated Income Statement. The amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost is recorded as staff expense on the Consolidated Income Statement. See Note 16 of the Notes to Consolidated Financial Statements for the location of the reclassification adjustment related to cash flow hedges on the Consolidated Income Statement.

Fair value measurement

Fair value measurement	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair value measurement	Fair value measurement Fair value is defined as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants at the measurement date. A three-level hierarchy for fair value measurements is utilized based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. BNY Mellon’s own creditworthiness is considered when valuing liabilities. See Note 18 of the Notes to Consolidated Financial Statements in our 2016 Annual Report for information on how we determine fair value and the fair value hierarchy. The following tables present the financial instruments carried at fair value at March 31, 2017 and Dec. 31, 2016 , by caption on the consolidated balance sheet and by the three-level valuation hierarchy. We have included credit ratings information in certain of the tables because the information indicates the degree of credit risk to which we are exposed, and significant changes in ratings classifications could result in increased risk for us. There were no material transfers between Level 1 and Level 2 during the first quarter of 2017 . Assets measured at fair value on a recurring basis at March 31, 2017 Total carrying (dollar amounts in millions) Level 1 Level 2 Level 3 Netting (a) Available-for-sale securities: U.S. Treasury $ 15,667 $ — $ — $ — $ 15,667 U.S. government agencies — 351 — — 351 Sovereign debt/sovereign guaranteed 68 12,103 — — 12,171 State and political subdivisions — 3,305 — — 3,305 Agency RMBS — 22,734 — — 22,734 Non-agency RMBS — 597 — — 597 Other RMBS — 451 — — 451 Commercial MBS — 911 — — 911 Agency commercial MBS — 7,111 — — 7,111 CLOs — 2,570 — — 2,570 Other asset-backed securities — 1,456 — — 1,456 Equity securities 3 — — — 3 Money market funds (b) 853 — — — 853 Corporate bonds — 1,366 — — 1,366 Other debt securities — 2,669 — — 2,669 Foreign covered bonds 1,897 170 — — 2,067 Non-agency RMBS (c) — 1,298 — — 1,298 Total available-for-sale securities 18,488 57,092 — — 75,580 Trading assets: Debt and equity instruments (b) 340 2,109 — — 2,449 Derivative assets not designated as hedging: Interest rate 3 6,885 — (5,365 ) 1,523 Foreign exchange — 3,119 — (2,195 ) 924 Equity and other contracts — 51 — (35 ) 16 Total derivative assets not designated as hedging 3 10,055 — (7,595 ) 2,463 Total trading assets 343 12,164 — (7,595 ) 4,912 Other assets: Derivative assets designated as hedging: Interest rate — 327 — — 327 Foreign exchange — 155 — — 155 Total derivative assets designated as hedging — 482 — — 482 Other assets (d) 283 41 — — 324 Other assets measured at net asset value (d) 150 Total other assets 283 523 — — 956 Subtotal assets of operations at fair value 19,114 69,779 — (7,595 ) 81,448 Percentage of assets prior to netting 22 % 78 % — % Assets of consolidated investment management funds 363 664 — — 1,027 Total assets $ 19,477 $ 70,443 $ — $ (7,595 ) $ 82,475 Percentage of assets prior to netting 22 % 78 % — % Liabilities measured at fair value on a recurring basis at March 31, 2017 Total carrying (dollar amounts in millions) Level 1 Level 2 Level 3 Netting (a) Trading liabilities: Debt and equity instruments $ 777 $ 190 $ — $ — $ 967 Derivative liabilities not designated as hedging: Interest rate 2 6,899 — (6,529 ) 372 Foreign exchange — 3,055 — (1,645 ) 1,410 Equity and other contracts — 121 — (54 ) 67 Total derivative liabilities not designated as hedging 2 10,075 — (8,228 ) 1,849 Total trading liabilities 779 10,265 — (8,228 ) 2,816 Long-term debt (b) — 364 — — 364 Other liabilities – derivative liabilities designated as hedging: Interest rate — 467 — — 467 Foreign exchange — 88 — — 88 Total other liabilities – derivative liabilities designated as hedging — 555 — — 555 Subtotal liabilities of operations at fair value 779 11,184 — (8,228 ) 3,735 Percentage of liabilities prior to netting 7 % 93 % — % Liabilities of consolidated investment management funds 1 208 — — 209 Total liabilities $ 780 $ 11,392 $ — $ (8,228 ) $ 3,944 Percentage of liabilities prior to netting 6 % 94 % — % (a) ASC 815, Derivatives and Hedging, permits the netting of derivative receivables and derivative payables under legally enforceable master netting agreements and permits the netting of cash collateral. Netting is applicable to derivatives not designated as hedging instruments included in trading assets or trading liabilities, and derivatives designated as hedging instruments included in other assets or other liabilities. Netting is allocated to the derivative products based on the net fair value of each product. (b) Includes certain interests in securitizations. (c) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (d) Includes private equity investments and seed capital. Assets measured at fair value on a recurring basis at Dec. 31, 2016 Total carrying value (dollar amounts in millions) Level 1 Level 2 Level 3 Netting (a) Available-for-sale securities: U.S. Treasury $ 14,307 $ — $ — $ — $ 14,307 U.S. government agencies — 359 — — 359 Sovereign debt/sovereign guaranteed 66 12,423 — — 12,489 State and political subdivisions — 3,378 — — 3,378 Agency RMBS — 22,736 — — 22,736 Non-agency RMBS — 638 — — 638 Other RMBS — 513 — — 513 Commercial MBS — 928 — — 928 Agency commercial MBS — 6,449 — — 6,449 CLOs — 2,598 — — 2,598 Other asset-backed securities — 1,727 — — 1,727 Equity securities 3 — — — 3 Money market funds (b) 842 — — — 842 Corporate bonds — 1,396 — — 1,396 Other debt securities — 1,961 — — 1,961 Foreign covered bonds 1,876 265 — — 2,141 Non-agency RMBS (c) — 1,357 — — 1,357 Total available-for-sale securities 17,094 56,728 — — 73,822 Trading assets: Debt and equity instruments (b) 240 2,013 — — 2,253 Derivative assets not designated as hedging: Interest rate 4 7,583 — (6,047 ) 1,540 Foreign exchange — 6,104 — (4,172 ) 1,932 Equity and other contracts — 46 — (38 ) 8 Total derivative assets not designated as hedging 4 13,733 — (10,257 ) 3,480 Total trading assets 244 15,746 — (10,257 ) 5,733 Other assets : Derivative assets designated as hedging: Interest rate — 415 — — 415 Foreign exchange — 369 — — 369 Total derivative assets designated as hedging — 784 — — 784 Other assets (d) 268 73 — — 341 Other assets measured at net asset value (d) 214 Total other assets 268 857 — — 1,339 Subtotal assets of operations at fair value 17,606 73,331 — (10,257 ) 80,894 Percentage of assets prior to netting 19 % 81 % — % Assets of consolidated investment management funds 464 767 — — 1,231 Total assets $ 18,070 $ 74,098 $ — $ (10,257 ) $ 82,125 Percentage of assets prior to netting 20 % 80 % — % Liabilities measured at fair value on a recurring basis at Dec. 31, 2016 Total carrying value (dollar amounts in millions) Level 1 Level 2 Level 3 Netting (a) Trading liabilities: Debt and equity instruments $ 349 $ 236 $ — $ — $ 585 Derivative liabilities not designated as hedging: Interest rate 4 7,629 — (6,634 ) 999 Foreign exchange — 6,103 — (3,363 ) 2,740 Equity and other contracts — 115 — (50 ) 65 Total derivative liabilities not designated as hedging 4 13,847 — (10,047 ) 3,804 Total trading liabilities 353 14,083 — (10,047 ) 4,389 Long-term debt ( b ) — 363 — — 363 Other liabilities – derivative liabilities designated as hedging: Interest rate — 545 — — 545 Foreign exchange — 52 — — 52 Total other liabilities – derivative liabilities designated as hedging — 597 — — 597 Subtotal liabilities of operations at fair value 353 15,043 — (10,047 ) 5,349 Percentage of liabilities prior to netting 2 % 98 % — % Liabilities of consolidated investment management funds 3 312 — — 315 Total liabilities $ 356 $ 15,355 $ — $ (10,047 ) $ 5,664 Percentage of liabilities prior to netting 2 % 98 % — % (a) ASC 815, Derivatives and Hedging, permits the netting of derivative receivables and derivative payables under legally enforceable master netting agreements and permits the netting of cash collateral. Netting is applicable to derivatives not designated as hedging instruments included in trading assets or trading liabilities, and derivatives designated as hedging instruments included in other assets or other liabilities. Netting is allocated to the derivative products based on the net fair value of each product. (b) Includes certain interests in securitizations. (c) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (d) Includes private equity investments and seed capital. Details of certain items measured at fair value on a recurring basis March 31, 2017 Dec. 31, 2016 Total carrying value (a) Ratings Total carrying value (a) Ratings AAA/ AA- A+/ A- BBB+/ BBB- BB+ and lower AAA/ AA- A+/ A- BBB+/ BBB- BB+ and lower (dollar amounts in millions) Non-agency RMBS, originated in: 2007 $ 51 — % — % — % 100 % $ 58 — % — % — % 100 % 2006 93 — — — 100 98 — — — 100 2005 169 24 3 7 66 180 23 5 9 63 2004 and earlier 284 5 3 23 69 302 5 3 24 68 Total non-agency RMBS $ 597 9 % 2 % 13 % 76 % $ 638 9 % 3 % 14 % 74 % Commercial MBS - Domestic, originated in: 2009-2017 $ 705 86 % 14 % — % — % $ 674 84 % 16 % — % — % 2008 13 100 — — — 14 100 — — — 2007 142 62 38 — — 190 71 29 — — 2006 2 6 3 — 91 3 7 93 — — Total commercial MBS - Domestic $ 862 82 % 18 % — % — % $ 881 81 % 19 % — % — % Foreign covered bonds: Canada $ 1,468 100 % — % — % — % $ 1,320 100 % — % — % — % United Kingdom 112 100 — — — 280 100 — — — Netherlands 162 100 — — — 160 100 — — — Other 325 100 — — — 381 100 — — — Total foreign covered bonds $ 2,067 100 % — % — % — % $ 2,141 100 % — % — % — % European floating rate notes - available-for-sale: United Kingdom $ 321 88 % 12 % — % — % $ 379 90 % 10 % — % — % Netherlands 121 100 — — — 125 100 — — — Ireland 58 — — 100 — 58 — — 100 — Total European floating rate notes - available-for-sale $ 500 81 % 7 % 12 % — % $ 562 83 % 7 % 10 % — % Sovereign debt/sovereign guaranteed: United Kingdom $ 2,816 100 % — % — % — % $ 3,209 100 % — % — % — % France 2,005 100 — — — 1,998 100 — — — Spain 1,774 — — 100 — 1,749 — — 100 — Germany 1,394 100 — — — 1,347 100 — — — Italy 1,138 — — 100 — 1,130 — — 100 — Netherlands 1,019 100 — — — 1,061 100 — — — Belgium 958 100 — — — 1,005 100 — — — Ireland 735 — 100 — — 736 — 100 — — Other (b) 332 58 — — 42 254 71 — — 29 Total sovereign debt/sovereign guaranteed $ 12,171 69 % 6 % 24 % 1 % $ 12,489 70 % 6 % 23 % 1 % Non-agency RMBS (c) , originated in: 2007 $ 376 — % — % — % 100 % $ 387 — % — % — % 100 % 2006 373 — — — 100 391 — — — 100 2005 414 — 2 1 97 437 — 2 1 97 2004 and earlier 135 2 2 17 79 142 2 2 17 79 Total non-agency RMBS (c) $ 1,298 — % 1 % 2 % 97 % $ 1,357 — % 1 % 2 % 97 % (a) At March 31, 2017 and Dec. 31, 2016 , foreign covered bonds and sovereign debt were included in Level 1 and Level 2 in the valuation hierarchy. All other assets in the table are Level 2 assets in the valuation hierarchy. (b) Included noninvestment grade sovereign debt related to Brazil of $140 million at March 31, 2017 and $73 million at Dec. 31, 2016 . (c) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. Changes in Level 3 fair value measurements Our classification of a financial instrument in Level 3 of the valuation hierarchy is based on the significance of the unobservable factors to the overall fair value measurement. However, these instruments generally include other observable components that are actively quoted or validated to third-party sources; accordingly, the gains and losses in the table below include changes in fair value due to observable parameters as well as the unobservable parameters in our valuation methodologies. We also manage the risks of Level 3 financial instruments using securities and derivatives positions that are Level 1 or 2 instruments which are not included in the table; accordingly, the gains or losses below do not reflect the effect of our risk management activities related to the Level 3 instruments. The Company has a Level 3 Pricing Committee which evaluates the valuation techniques used in determining the fair value of Level 3 assets and liabilities. The table below includes a roll forward of the balance sheet amount for the quarter ended March 31, 2016 (including the change in fair value), for financial instruments classified in Level 3 of the valuation hierarchy. Fair value measurements for assets using significant unobservable inputs for the quarter ended March 31, 2016 (in millions) Loans Fair value at Dec. 31, 2015 $ — Transfers into Level 3 19 Total gains or (losses) for the period included in earnings 2 (a) Purchases 48 Fair value at March 31, 2016 $ 69 Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period $ 2 (a) Reported in investment and other income. Assets and liabilities measured at fair value on a nonrecurring basis Under certain circumstances, we make adjustments to fair value our assets, liabilities and unfunded lending-related commitments although they are not measured at fair value on an ongoing basis. An example would be the recording of an impairment of an asset. The following tables present the financial instruments carried on the consolidated balance sheet by caption and by level in the fair value hierarchy as of March 31, 2017 and Dec. 31, 2016 , for which a nonrecurring change in fair value has been recorded during the quarters ended March 31, 2017 and Dec. 31, 2016 . Assets measured at fair value on a nonrecurring basis at March 31, 2017 Total carrying value (in millions) Level 1 Level 2 Level 3 Loans (a) $ — $ 83 $ 3 $ 86 Other assets (b) — 5 35 40 Total assets at fair value on a nonrecurring basis $ — $ 88 $ 38 $ 126 Assets measured at fair value on a nonrecurring basis at Dec. 31, 2016 Total carrying value (in millions) Level 1 Level 2 Level 3 Loans (a) $ — $ 84 $ 7 $ 91 Other assets (b) — 4 — 4 Total assets at fair value on a nonrecurring basis $ — $ 88 $ 7 $ 95 (a) During the quarters ended March 31, 2017 and Dec. 31, 2016 , the fair value of these loans decreased less than $1 million and $1 million , respectively, based on the fair value of the underlying collateral based on guidance in ASC 310, Receivables, with an offset to the allowance for credit losses. (b) Includes other assets received in satisfaction of debt. Estimated fair value of financial instruments The following tables present the estimated fair value and the carrying amount of financial instruments not carried at fair value on the consolidated balance sheet at March 31, 2017 and Dec. 31, 2016 , by caption on the consolidated balance sheet and by the valuation hierarchy. See Note 18 of the Notes to Consolidated Financial Statements in our 2016 Annual Report for additional information regarding the financial instruments within the scope of this disclosure, and the methods and significant assumptions used to estimate their fair value. Summary of financial instruments March 31, 2017 (in millions) Level 1 Level 2 Level 3 Total estimated fair value Carrying amount Assets: Interest-bearing deposits with the Federal Reserve and other central banks $ — $ 65,086 $ — $ 65,086 $ 65,086 Interest-bearing deposits with banks — 14,554 — 14,554 14,554 Federal funds sold and securities purchased under resale agreements — 25,776 — 25,776 25,776 Securities held-to-maturity 10,656 29,410 — 40,066 40,254 Loans (a) — 59,399 — 59,399 59,119 Other financial assets 5,366 1,098 — 6,464 6,464 Total $ 16,022 $ 195,323 $ — $ 211,345 $ 211,253 Liabilities: Noninterest-bearing deposits $ — $ 79,771 $ — $ 79,771 $ 79,771 Interest-bearing deposits — 139,777 — 139,777 141,520 Federal funds purchased and securities sold under repurchase agreements — 11,149 — 11,149 11,149 Payables to customers and broker-dealers — 21,306 — 21,306 21,306 Commercial paper — 2,543 — 2,543 2,543 Borrowings — 1,185 — 1,185 1,185 Long-term debt — 26,149 — 26,149 25,982 Total $ — $ 281,880 $ — $ 281,880 $ 283,456 (a) Does not include the leasing portfolio. Summary of financial instruments Dec. 31, 2016 (in millions) Level 1 Level 2 Level 3 Total estimated Carrying Assets: Interest-bearing deposits with the Federal Reserve and other central banks $ — $ 58,041 $ — $ 58,041 $ 58,041 Interest-bearing deposits with banks — 15,091 — 15,091 15,086 Federal funds sold and securities purchased under resale agreements — 25,801 — 25,801 25,801 Securities held-to-maturity 11,173 29,496 — 40,669 40,905 Loans (a) — 62,829 — 62,829 62,564 Other financial assets 4,822 1,112 — 5,934 5,934 Total $ 15,995 $ 192,370 $ — $ 208,365 $ 208,331 Liabilities: Noninterest-bearing deposits $ — $ 78,342 $ — $ 78,342 $ 78,342 Interest-bearing deposits — 141,418 — 141,418 143,148 Federal funds purchased and securities sold under repurchase agreements — 9,989 — 9,989 9,989 Payables to customers and broker-dealers — 20,987 — 20,987 20,987 Borrowings — 960 — 960 960 Long-term debt — 24,184 — 24,184 24,100 Total $ — $ 275,880 $ — $ 275,880 $ 277,526 (a) Does not include the leasing portfolio. The table below summarizes the carrying amount of the hedged financial instruments, the notional amount of the hedge and the unrealized gain (loss) (estimated fair value) of the derivatives. Hedged financial instruments Carrying amount Notional amount of hedge Unrealized (in millions) Gain (Loss) March 31, 2017 Securities available-for-sale $ 10,494 $ 10,549 $ 96 $ (271 ) Long-term debt 22,192 22,200 228 (196 ) Dec. 31, 2016 Securities available-for-sale $ 9,184 $ 9,233 $ 83 $ (342 ) Long-term debt 20,511 20,450 330 (203 )

Fair value option

Fair value option	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair value option	Fair value option We elected fair value as an alternative measurement for selected financial assets and financial liabilities. The following table presents the assets and liabilities, by type, of consolidated investment management funds recorded at fair value. Assets and liabilities of consolidated investment management funds, at fair value March 31, 2017 Dec. 31, 2016 (in millions) Assets of consolidated investment management funds: Trading assets $ 883 $ 979 Other assets 144 252 Total assets of consolidated investment management funds $ 1,027 $ 1,231 Liabilities of consolidated investment management funds: Trading liabilities $ — $ 282 Other liabilities 209 33 Total liabilities of consolidated investment management funds $ 209 $ 315 BNY Mellon values the assets and liabilities of its consolidated asset management funds using quoted prices for identical assets or liabilities in active markets or observable inputs such as quoted prices for similar assets or liabilities. Quoted prices for either identical or similar assets or liabilities in inactive markets may also be used. Accordingly, fair value best reflects the interests BNY Mellon holds in the economic performance of the consolidated asset management funds. Changes in the value of the assets and liabilities are recorded in the income statement as investment income of consolidated investment management funds and in the interest of investment management fund note holders, respectively. We have elected the fair value option on $240 million of long-term debt. The fair value of this long-term debt was $364 million at March 31, 2017 and $363 million at Dec. 31, 2016 . The long-term debt is valued using observable market inputs and is included in Level 2 of the valuation hierarchy. The following table presents the changes in fair value of long-term debt and certain loans for which we elected the fair value option that we previously held in 2016, and the location of the changes in the consolidated income statement. Impact of changes in fair value in the income statement (a) Quarter ended (in millions) March 31, 2017 Dec. 31, 2016 March 31, 2016 Loans: Investment and other income $ — $ (1 ) $ 9 Long-term debt: Foreign exchange and other trading (loss) revenue $ (1 ) $ 13 $ (13 ) (a) The changes in fair value of the loans and long-term debt are approximately offset by economic hedges included in foreign exchange and other trading revenue.

Commitments and contingent liab

Commitments and contingent liabilities	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingent liabilities	Commitments and contingent liabilities In the normal course of business, various commitments and contingent liabilities are outstanding that are not reflected in the accompanying consolidated balance sheets. Our significant trading and off-balance sheet risks are securities, foreign currency and interest rate risk management products, commercial lending commitments, letters of credit and securities lending indemnifications. We assume these risks to reduce interest rate and foreign currency risks, to provide customers with the ability to meet credit and liquidity needs and to hedge foreign currency and interest rate risks. These items involve, to varying degrees, credit, foreign currency and interest rate risk not recognized in the balance sheet. Our off-balance sheet risks are managed and monitored in manners similar to those used for on-balance sheet risks. Significant industry concentrations related to credit exposure at March 31, 2017 are disclosed in the financial institutions portfolio exposure and the commercial portfolio exposure tables below. Financial institutions portfolio exposure (in billions) March 31, 2017 Loans Unfunded commitments Total exposure Securities industry $ 3.1 $ 19.3 $ 22.4 Banks 7.2 1.9 9.1 Asset managers 1.6 6.2 7.8 Insurance 0.1 3.5 3.6 Government 0.1 0.9 1.0 Other 1.2 1.6 2.8 Total $ 13.3 $ 33.4 $ 46.7 Commercial portfolio exposure (in billions) March 31, 2017 Loans Unfunded commitments Total exposure Manufacturing $ 1.4 $ 6.6 $ 8.0 Energy and utilities 0.5 4.7 5.2 Services and other 0.7 4.2 4.9 Media and telecom 0.3 1.8 2.1 Total $ 2.9 $ 17.3 $ 20.2 Major concentrations in securities lending are primarily to broker-dealers and are generally collateralized with cash. Securities lending transactions are discussed below. The following table presents a summary of our off-balance sheet credit risks, net of participations. Off-balance sheet credit risks March 31, 2017 Dec. 31, 2016 (in millions) Lending commitments $ 51,293 $ 51,270 Standby letters of credit (a) 3,932 4,185 Commercial letters of credit 286 339 Securities lending indemnifications (b) 338,705 317,690 (a) Net of participations totaling $684 million at March 31, 2017 and $662 million at Dec. 31, 2016 . (b) Excludes the indemnification for securities for which BNY Mellon acts as an agent on behalf of CIBC Mellon clients , which totaled $64 billion at March 31, 2017 and $61 billion at Dec. 31, 2016 . The total potential loss on undrawn lending commitments, standby and commercial letters of credit, and securities lending indemnifications is equal to the total notional amount if drawn upon, which does not consider the value of any collateral. Since many of the commitments are expected to expire without being drawn upon, the total amount does not necessarily represent future cash requirements. A summary of lending commitment maturities is as follows: $29.4 billion in less than one year, $21.5 billion in one to five years and $411 million over five years. Standby letters of credit (“SBLC”) principally support corporate obligations and were collateralized with cash and securities of $283 million at March 31, 2017 and $293 million at Dec. 31, 2016 . At March 31, 2017 , $2.4 billion of the SBLCs will expire within one year and $1.5 billion in one to five years. We must recognize, at the inception of an SBLC and foreign and other guarantees, a liability for the fair value of the obligation undertaken in issuing the guarantee. The fair value of the liability, which was recorded with a corresponding asset in other assets, was estimated as the present value of contractual customer fees. The estimated liability for losses related to these commitments and SBLCs, if any, is included in the allowance for lending-related commitments. The allowance for lending-related commitments was $112 million at March 31, 2017 and $112 million at Dec. 31, 2016 . Payment/performance risk of SBLCs is monitored using both historical performance and internal ratings criteria. BNY Mellon’s historical experience is that SBLCs typically expire without being funded. SBLCs below investment grade are monitored closely for payment/performance risk. The table below shows SBLCs by investment grade: Standby letters of credit March 31, 2017 Dec. 31, 2016 Investment grade 88 % 89 % Non-investment grade 12 % 11 % A commercial letter of credit is normally a short-term instrument used to finance a commercial contract for the shipment of goods from a seller to a buyer. Although the commercial letter of credit is contingent upon the satisfaction of specified conditions, it represents a credit exposure if the buyer defaults on the underlying transaction. As a result, the total contractual amounts do not necessarily represent future cash requirements. Commercial letters of credit totaled $286 million at March 31, 2017 and $339 million at Dec. 31, 2016 . A securities lending transaction is a fully collateralized transaction in which the owner of a security agrees to lend the security (typically through an agent, in our case, The Bank of New York Mellon), to a borrower, usually a broker-dealer or bank, on an open, overnight or term basis, under the terms of a prearranged contract, which normally matures in less than 90 days. We typically lend securities with indemnification against borrower default. We generally require the borrower to provide collateral with a minimum value of 102% of the fair value of the securities borrowed, which is monitored on a daily basis, thus reducing credit risk. Market risk can also arise in securities lending transactions. These risks are controlled through policies limiting the level of risk that can be undertaken. Securities lending transactions are generally entered into only with highly rated counterparties. Securities lending indemnifications were secured by collateral of $353 billion at March 31, 2017 and $331 billion at Dec. 31, 2016 . CIBC Mellon, a joint venture between BNY Mellon and the Canadian Imperial Bank of Commerce (“CIBC”), engages in securities lending activities. CIBC Mellon, BNY Mellon and CIBC jointly and severally indemnify securities lenders against specific types of borrower default. At March 31, 2017 and Dec. 31, 2016 , $64 billion and $61 billion , respectively, of borrowings at CIBC Mellon for which BNY Mellon acts as agent on behalf of CIBC Mellon clients, were secured by collateral of $67 billion and $64 billion , respectively. If, upon a default, a borrower’s collateral was not sufficient to cover its related obligations, certain losses related to the indemnification could be covered by the indemnitors. We expect many of these guarantees to expire without the need to advance any cash. The revenue associated with guarantees frequently depends on the credit rating of the obligor and the structure of the transaction, including collateral, if any. Exposure for certain administrative errors In connection with certain offshore tax-exempt funds that we manage, we may be liable to the funds for certain administrative errors. The errors relate to the resident status of such funds, potentially exposing the Company to a tax liability related to the funds’ earnings. The Company is in discussions with tax authorities regarding the funds. With the charge recorded in 2014 for this matter, we believe we are appropriately accrued and the additional reasonably possible exposure is not significant. Indemnification arrangements We have provided standard representations for underwriting agreements, acquisition and divestiture agreements, sales of loans and commitments, and other similar types of arrangements and customary indemnification for claims and legal proceedings related to providing financial services that are not otherwise included above. Insurance has been purchased to mitigate certain of these risks. Generally, there are no stated or notional amounts included in these indemnifications and the contingencies triggering the obligation for indemnification are not expected to occur. Furthermore, often counterparties to these transactions provide us with comparable indemnifications. We are unable to develop an estimate of the maximum payout under these indemnifications for several reasons. In addition to the lack of a stated or notional amount in a majority of such indemnifications, we are unable to predict the nature of events that would trigger indemnification or the level of indemnification for a certain event. We believe, however, that the possibility that we will have to make any material payments for these indemnifications is remote. At March 31, 2017 and Dec. 31, 2016 , we have not recorded any material liabilities under these arrangements. Clearing and settlement exchanges We are a noncontrolling equity investor in, and/or member of, several industry clearing or settlement exchanges through which foreign exchange, securities, derivatives or other transactions settle. Certain of these industry clearing and settlement exchanges require their members to guarantee their obligations and liabilities and/or to provide liquidity support in the event other members do not honor their obligations. We believe the likelihood that a clearing or settlement exchange (of which we are a member) would become insolvent is remote. Additionally, certain settlement exchanges have implemented loss allocation policies that enable the exchange to allocate settlement losses to the members of the exchange. It is not possible to quantify such mark-to-market loss until the loss occurs. In addition, any ancillary costs that occur as a result of any mark-to-market loss cannot be quantified. At March 31, 2017 and Dec. 31, 2016 , we have not recorded any material liabilities under these arrangements. Legal proceedings In the ordinary course of business, BNY Mellon and its subsidiaries are routinely named as defendants in or made parties to pending and potential legal actions. We also are subject to governmental and regulatory examinations, information-gathering requests, investigations and proceedings (both formal and informal). Claims for significant monetary damages are often asserted in many of these legal actions, while claims for disgorgement, restitution, penalties and/or other remedial actions or sanctions may be sought in governmental and regulatory matters. It is inherently difficult to predict the eventual outcomes of such matters given their complexity and the particular facts and circumstances at issue in each of these matters. However, on the basis of our current knowledge and understanding, we do not believe that judgments, settlements or orders, if any, arising from these matters (either individually or in the aggregate, after giving effect to applicable reserves and insurance coverage) will have a material adverse effect on the consolidated financial position or liquidity of BNY Mellon, although they could have a material effect on net income in a given period. In view of the inherent unpredictability of outcomes in litigation and governmental and regulatory matters, particularly where (i) the damages sought are substantial or indeterminate, (ii) the proceedings are in the early stages, or (iii) the matters involve novel legal theories or a large number of parties, as a matter of course there is considerable uncertainty surrounding the timing or ultimate resolution of litigation and governmental and regulatory matters, including a possible eventual loss, fine, penalty or business impact, if any, associated with each such matter. In accordance with applicable accounting guidance, BNY Mellon establishes accruals for litigation and governmental and regulatory matters when those matters proceed to a stage where they present loss contingencies that are both probable and reasonably estimable. In such cases, there may be a possible exposure to loss in excess of any amounts accrued. BNY Mellon will continue to monitor such matters for developments that could affect the amount of the accrual, and will adjust the accrual amount as appropriate. If the loss contingency in question is not both probable and reasonably estimable, BNY Mellon does not establish an accrual and the matter will continue to be monitored for any developments that would make the loss contingency both probable and reasonably estimable. BNY Mellon believes that its accruals for legal proceedings are appropriate and, in the aggregate, are not material to the consolidated financial position of BNY Mellon, although future accruals could have a material effect on net income in a given period. For certain of those matters described here for which a loss contingency may, in the future, be reasonably possible (whether in excess of a related accrued liability or where there is no accrued liability), BNY Mellon is currently unable to estimate a range of reasonably possible loss. For those matters described here where BNY Mellon is able to estimate a reasonably possible loss, the aggregate range of such reasonably possible loss is up to $920 million in excess of the accrued liability (if any) related to those matters. The following describes certain judicial, regulatory and arbitration proceedings involving BNY Mellon: Mortgage-Securitization Trusts Proceedings The Bank of New York Mellon has been named as a defendant in a number of legal actions brought by MBS investors alleging that the trustee has expansive duties under the governing agreements, including the duty to investigate and pursue breach of representation and warranty claims against other parties to the MBS transactions. These actions include a lawsuit brought in New York State court on June 18, 2014, and later re-filed in federal court, by a group of institutional investors who purport to sue on behalf of 253 MBS trusts. Matters Related to R. Allen Stanford In late December 2005, Pershing LLC (“Pershing”) became a clearing firm for Stanford Group Co. (“SGC”), a registered broker-dealer that was part of a group of entities ultimately controlled by R. Allen Stanford (“Stanford”). Stanford International Bank (“SIB”), also controlled by Stanford, issued certificates of deposit (“CDs”). Some investors allegedly wired funds from their SGC accounts to purchase CDs. In 2009, the SEC charged Stanford with operating a Ponzi scheme in connection with the sale of CDs, and SGC was placed into receivership. Alleged purchasers of CDs have filed 15 lawsuits against Pershing that are pending in Texas, including two putative class actions. The purchasers allege that Pershing, as SGC’s clearing firm, assisted Stanford in a fraudulent scheme and assert contractual, statutory and common law claims. In addition, one FINRA arbitration matter brought by alleged purchasers remains pending. Brazilian Postalis Litigation BNY Mellon Servicos Financeiros DTVM S.A. (“DTVM”), a subsidiary that provides a number of asset services in Brazil, acts as administrator for certain investment funds in which the exclusive investor is a public pension fund for postal workers called Postalis-Instituto de Seguridade Social dos Correios e Telégrafos (“Postalis”). On Aug. 22, 2014, Postalis sued DTVM in Rio de Janeiro, Brazil for losses related to a Postalis investment fund for which DTVM serves as fund administrator. Postalis alleges that DTVM failed to properly perform alleged duties, including duties to conduct due diligence of and exert control over the fund manager, Atlântica Administração de Recursos (“Atlântica”), and Atlântica’s investments. On March 12, 2015, Postalis filed a lawsuit in Rio de Janeiro against DTVM and BNY Mellon Administração de Ativos Ltda. (“Ativos”) alleging failure to properly perform alleged duties relating to another fund of which DTVM is administrator and Ativos is investment manager. On Dec. 14, 2015, Associaceão Dos Profissionais Dos Correiros, a Brazilian postal workers association, filed a lawsuit in São Paulo against DTVM and other defendants alleging that DTVM improperly contributed to investment losses in the Postalis portfolio. On March 20, 2017, the lawsuit was dismissed without prejudice. On Dec. 17, 2015, Postalis filed three additional lawsuits in Rio de Janeiro against DTVM and Ativos alleging failure to properly perform alleged duties and liabilities for losses with respect to investments in several other funds. On Feb. 4, 2016, Postalis filed another lawsuit in Brasilia against DTVM, Ativos and BNY Mellon Alocação de Patrimônio Ltda., an investment management subsidiary, alleging failure to properly perform duties and liability for losses with respect to investments in various other funds of which the defendants were administrator and/or manager. The lawsuit has been transferred to São Paulo. Depositary Receipt Matters Between late December 2015 and February 2016, four putative class action lawsuits were filed against BNY Mellon asserting claims relating to BNY Mellon’s foreign exchange pricing when converting dividends and other distributions from non-U.S. companies in its role as depositary bank to Depositary Receipt issuers. The claims are for breach of contract and violations of ERISA. The lawsuits have been consolidated into two suits that are pending in federal court in the Southern District of New York. Brazilian Silverado Litigation DTVM acts as administrator for the Fundo de Investimento em Direitos Creditórios Multisetorial Silverado Maximum (“Silverado Maximum Fund”), which invests in commercial credit receivables. On June 2, 2016, the Silverado Maximum Fund sued DTVM in its capacity as administrator, along with Deutsche Bank S.A. - Banco Alemão in its capacity as custodian and Silverado Gestão e Investimentos Ltda. in its capacity as investment manager. The Fund alleges that each of the defendants failed to fulfill its respective duty, and caused losses to the Fund for which the defendants are jointly and severally liable.

Derivative instruments

Derivative instruments	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative instruments	Derivative instruments We use derivatives to manage exposure to market risk including interest rate risk, equity price risk and foreign currency risk, as well as credit risk. Our trading activities are focused on acting as a market-maker for our customers and facilitating customer trades in compliance with the Volcker Rule. The notional amounts for derivative financial instruments express the dollar volume of the transactions; however, credit risk is much smaller. We perform credit reviews and enter into netting agreements and collateral arrangements to minimize the credit risk of derivative financial instruments. We enter into offsetting positions to reduce exposure to foreign currency, interest rate and equity price risk. Use of derivative financial instruments involves reliance on counterparties. Failure of a counterparty to honor its obligation under a derivative contract is a risk we assume whenever we engage in a derivative contract. There were no counterparty default losses recorded in the first quarter of 2017 or the first quarter of 2016 . Hedging derivatives We utilize interest rate swap agreements to manage our exposure to interest rate fluctuations. For hedges of available-for-sale investment securities, deposits and long-term debt, the hedge documentation specifies the terms of the hedged items and the interest rate swaps and indicates that the derivative is hedging a fixed rate item and is a fair value hedge, that the hedge exposure is to the changes in the fair value of the hedged item due to changes in benchmark interest rates, and that the strategy is to eliminate fair value variability by converting fixed rate interest payments to LIBOR. The available-for-sale investment securities hedged consist of U.S. Treasury bonds, agency commercial mortgage-backed securities, sovereign debt and covered bonds that had original maturities of 30 years or less at initial purchase. The swaps on all of these investment securities are not callable. All of these securities are hedged with “pay fixed rate, receive variable rate” swaps of similar maturity, repricing and fixed rate coupon. At March 31, 2017 , $10.5 billion face amount of securities were hedged with interest rate swaps that had notional values of $10.5 billion . The fixed rate long-term debt instruments hedged generally have original maturities of five to 30 years. We issue both callable and non-callable debt. The non-callable debt is hedged with “receive fixed rate, pay variable rate” swaps with similar maturity, repricing and fixed rate coupon. Callable debt is hedged with callable swaps where the call dates of the swaps exactly match the call dates of the debt. At March 31, 2017 , $22.2 billion par value of debt was hedged with interest rate swaps that had notional values of $22.2 billion . In addition, we enter into foreign exchange hedges. We use forward foreign exchange contracts with maturities of nine months or less to hedge our Indian rupee, British pound, Hong Kong dollar, Singapore dollar, euro and Canadian dollar foreign exchange exposure with respect to foreign currency forecasted revenue and expense transactions in entities that have the U.S. dollar as their functional currency. As of March 31, 2017 , the hedged forecasted foreign currency transactions and designated forward foreign exchange contract hedges were $341 million (notional), with a pre-tax loss of $8 million recorded in accumulated other comprehensive income. This loss will be reclassified to income or expense over the next nine months. Forward foreign exchange contracts are also used to hedge the value of our net investments in foreign subsidiaries. These forward foreign exchange contracts have maturities of less than two years. The derivatives employed are designated as hedges of changes in value of our foreign investments due to exchange rates. Changes in the value of the forward foreign exchange contracts offset the changes in value of the foreign investments due to changes in foreign exchange rates. The change in fair market value of these forward foreign exchange contracts is deferred and reported within foreign currency translation adjustments in shareholders’ equity, net of tax. At March 31, 2017 , forward foreign exchange contracts with notional amounts totaling $7.3 billion were designated as hedges. In addition to forward foreign exchange contracts, we also designate non-derivative financial instruments as hedges of our net investments in foreign subsidiaries. Those non-derivative financial instruments designated as hedges of our net investments in foreign subsidiaries were all long-term liabilities of BNY Mellon in various currencies, and, at March 31, 2017 , had a combined U.S. dollar equivalent value of $163 million . Ineffectiveness related to derivatives and hedging relationships was recorded in income as follows: Ineffectiveness Quarter ended (in millions) March 31, 2017 Dec. 31, 2016 March 31, 2016 Fair value hedges of securities $ 0.6 $ 7.0 $ (1.1 ) Fair value hedges of long-term debt (4.8 ) 17.8 (12.5 ) Cash flow hedges — — — Other (a) — — — Total $ (4.2 ) $ 24.8 $ (13.6 ) (a) Includes ineffectiveness recorded on foreign exchange hedges. The following table summarizes the notional amount and credit exposure of our total derivative portfolio at March 31, 2017 and Dec. 31, 2016 . Impact of derivative instruments on the balance sheet Notional value Asset derivatives fair value Liability derivatives fair value (in millions) March 31, 2017 Dec. 31, 2016 March 31, 2017 Dec. 31, 2016 March 31, 2017 Dec. 31, 2016 Derivatives designated as hedging instruments: (a) Interest rate contracts $ 32,749 $ 29,683 $ 327 $ 415 $ 467 $ 545 Foreign exchange contracts 7,605 7,796 155 369 88 52 Total derivatives designated as hedging instruments $ 482 $ 784 $ 555 $ 597 Derivatives not designated as hedging instruments: (b) Interest rate contracts $ 291,694 $ 325,412 $ 6,888 $ 7,587 $ 6,901 $ 7,633 Foreign exchange contracts 564,599 530,729 3,119 6,104 3,055 6,103 Equity contracts 1,236 1,167 51 46 118 112 Credit contracts 160 160 — — 3 3 Total derivatives not designated as hedging instruments $ 10,058 $ 13,737 $ 10,077 $ 13,851 Total derivatives fair value (c) $ 10,540 $ 14,521 $ 10,632 $ 14,448 Effect of master netting agreements (d) (7,595 ) (10,257 ) (8,228 ) (10,047 ) Fair value after effect of master netting agreements $ 2,945 $ 4,264 $ 2,404 $ 4,401 (a) The fair value of asset derivatives and liability derivatives designated as hedging instruments is recorded as other assets and other liabilities, respectively, on the balance sheet. (b) The fair value of asset derivatives and liability derivatives not designated as hedging instruments is recorded as trading assets and trading liabilities, respectively, on the balance sheet. (c) Fair values are on a gross basis, before consideration of master netting agreements, as required by ASC 815, Derivatives and Hedging. (d) Effect of master netting agreements includes cash collateral received and paid of $752 million and $1,385 million , respectively, at March 31, 2017 , and $1,119 million and $909 million , respectively, at Dec. 31, 2016 . The following tables present the impact of derivative instruments used in fair value, cash flow and net investment hedging relationships on the income statement. Impact of derivative instruments on the income statement (in millions) Derivatives in fair value hedging relationships Location of gain or (loss) recognized in income on derivatives Gain or (loss) recognized in income on derivatives Location of gain or(loss) recognized in income on hedged item Gain or (loss) recognized in hedged item 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 Interest rate contracts Net interest revenue $ 10 $ 171 $ (148 ) Net interest revenue $ (14 ) $ (147 ) $ 134 Derivatives in cash flow hedging relationships Gain or (loss) recognized in accumulated OCI on derivatives (effective portion) Location of gain or (loss) reclassified from accumulated OCI into income (effective portion) Gain or (loss) reclassified from accumulated OCI into income (effective portion) Location of gain or (loss) recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing) Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing) 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 FX contracts $ — $ (2 ) $ 6 Net interest revenue $ — $ (2 ) $ 5 Net interest revenue $ — $ — $ — FX contracts — — — Other revenue — — — Other revenue — — — FX contracts 3 73 (89 ) Trading revenue 3 73 (89 ) Trading revenue — — — FX contracts 11 (8 ) 2 Salary expense (4 ) (6 ) (2 ) Salary expense — — — Total $ 14 $ 63 $ (81 ) $ (1 ) $ 65 $ (86 ) $ — $ — $ — Derivatives in net investment hedging relationships Gain or (loss) recognized in accumulated OCI on derivatives (effective portion) Location of gain or (loss) reclassified from accumulated OCI into income (effective portion) Gain or (loss) reclassified from accumulated OCI into income (effective portion) Location of gain or (loss) recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing) Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing) 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 FX contracts $ (96 ) $ 332 $ (58 ) Net interest revenue $ — $ — $ — Other revenue $ — $ — $ — Trading activities (including trading derivatives) We manage trading risk through a system of position limits, a VaR methodology based on historical simulation and other market sensitivity measures. Risk is monitored and reported to senior management by a separate unit, independent from trading, on a daily basis. Based on certain assumptions, the VaR methodology is designed to capture the potential overnight pre-tax dollar loss from adverse changes in fair values of all trading positions. The calculation assumes a one -day holding period, utilizes a 99% confidence level and incorporates non-linear product characteristics. The VaR model is one of several statistical models used to develop economic capital results, which is allocated to lines of business for computing risk-adjusted performance. As the VaR methodology does not evaluate risk attributable to extraordinary financial, economic or other occurrences, the risk assessment process includes a number of stress scenarios based upon the risk factors in the portfolio and management’s assessment of market conditions. Additional stress scenarios based upon historical market events are also performed. Stress tests may incorporate the impact of reduced market liquidity and the breakdown of historically observed correlations and extreme scenarios. VaR and other statistical measures, stress testing and sensitivity analysis are incorporated in other risk management materials. Revenue from foreign exchange and other trading included the following: Foreign exchange and other trading revenue (in millions) 1Q17 4Q16 1Q16 Foreign exchange $ 154 $ 175 $ 171 Other trading revenue (loss) 10 (14 ) 4 Total foreign exchange and other trading revenue $ 164 $ 161 $ 175 Foreign exchange includes income from purchasing and selling foreign currencies and currency forwards, futures and options. Other trading revenue reflects results from futures and forward contracts, interest rate swaps, structured foreign currency swaps, options, equity derivatives and fixed income and equity securities. Counterparty credit risk and collateral We assess credit risk of our counterparties through regular examination of their financial statements, confidential communication with the management of those counterparties and regular monitoring of publicly available credit rating information. This and other information is used to develop proprietary credit rating metrics used to assess credit quality. Collateral requirements are determined after a comprehensive review of the credit quality of each counterparty. Collateral is generally held or pledged in the form of cash or highly liquid government securities. Collateral requirements are monitored and adjusted daily. Additional disclosures concerning derivative financial instruments are provided in Note 14 of the Notes to Consolidated Financial Statements. Disclosure of contingent features in OTC derivative instruments Certain OTC derivative contracts and/or collateral agreements of The Bank of New York Mellon, our largest banking subsidiary and the subsidiary through which BNY Mellon enters into the substantial majority of its OTC derivative contracts and/or collateral agreements, contain provisions that may require us to take certain actions if The Bank of New York Mellon’s public debt rating fell to a certain level. Early termination provisions, or “close-out” agreements, in those contracts could trigger immediate payment of outstanding contracts that are in net liability positions. Certain collateral agreements would require The Bank of New York Mellon to immediately post additional collateral to cover some or all of The Bank of New York Mellon’s liabilities to a counterparty. The following table shows the fair value of contracts falling under early termination provisions that were in net liability positions as of March 31, 2017 for three key ratings triggers: If The Bank of New York Mellon’s rating was changed to (Moody’s/S&P) Potential close-out exposures (fair value) (a) A3/A- $ 26 million Baa2/BBB $ 540 million Ba1/BB+ $ 1,483 million (a) The amounts represent potential total close-out values if The Bank of New York Mellon’s rating were to immediately drop to the indicated levels. The aggregated fair value of contracts impacting potential trade close-out amounts and collateral obligations can fluctuate from quarter to quarter due to changes in market conditions, changes in the composition of counterparty trades, new business or changes to the agreement definitions establishing close-out or collateral obligations. Additionally, if The Bank of New York Mellon’s debt rating had fallen below investment grade on March 31, 2017 , existing collateral arrangements would have required us to post an additional $116 million of collateral. Offsetting assets and liabilities The following tables present derivative instruments and financial instruments that are either subject to an enforceable netting agreement or offset by collateral arrangements. There were no derivative instruments or financial instruments subject to a legally enforceable netting agreement for which we are not currently netting. Offsetting of derivative assets and financial assets at March 31, 2017 Gross assets recognized Gross amounts offset in the balance sheet Net assets recognized on the balance sheet Gross amounts not offset in the balance sheet (in millions) (a) Financial instruments Cash collateral received Net amount Derivatives subject to netting arrangements: Interest rate contracts $ 6,582 $ 5,365 $ 1,217 $ 277 $ — $ 940 Foreign exchange contracts 2,779 2,195 584 73 — 511 Equity and other contracts 51 35 16 — — 16 Total derivatives subject to netting arrangements 9,412 7,595 1,817 350 — 1,467 Total derivatives not subject to netting arrangements 1,128 — 1,128 — — 1,128 Total derivatives 10,540 7,595 2,945 350 — 2,595 Reverse repurchase agreements 16,730 502 (b) 16,228 16,228 — — Securities borrowing 9,548 — 9,548 9,267 — 281 Total $ 36,818 $ 8,097 $ 28,721 $ 25,845 $ — $ 2,876 (a) Includes the effect of netting agreements and net cash collateral received. The offset related to the OTC derivatives was allocated to the various types of derivatives based on the net positions. (b) Offsetting of reverse repurchase agreements relates to our involvement in the Fixed Income Clearing Corporation, where we settle government securities transactions on a net basis for payment and delivery through the Fedwire system. Offsetting of derivative assets and financial assets at Dec. 31, 2016 Gross assets recognized Gross amounts offset in the balance sheet Net assets recognized on the balance sheet Gross amounts not offset in the balance sheet (in millions) (a) Financial instruments Cash collateral received Net amount Derivatives subject to netting arrangements: Interest rate contracts $ 7,205 $ 6,047 $ 1,158 $ 321 $ — $ 837 Foreign exchange contracts 5,265 4,172 1,093 202 — 891 Equity and other contracts 44 38 6 — — 6 Total derivatives subject to netting arrangements 12,514 10,257 2,257 523 — 1,734 Total derivatives not subject to netting arrangements 2,007 — 2,007 — — 2,007 Total derivatives 14,521 10,257 4,264 523 — 3,741 Reverse repurchase agreements 17,588 481 (b) 17,107 17,104 — 3 Securities borrowing 8,694 — 8,694 8,425 — 269 Total $ 40,803 $ 10,738 $ 30,065 $ 26,052 $ — $ 4,013 (a) Includes the effect of netting agreements and net cash collateral received. The offset related to the OTC derivatives was allocated to the various types of derivatives based on the net positions. (b) Offsetting of reverse repurchase agreements relates to our involvement in the Fixed Income Clearing Corporation, where we settle government securities transactions on a net basis for payment and delivery through the Fedwire system. Offsetting of derivative liabilities and financial liabilities at March 31, 2017 Net liabilities recognized on the balance sheet Gross liabilities recognized Gross amounts offset in the balance sheet Gross amounts not offset in the balance sheet (in millions) (a) Financial instruments Cash collateral pledged Net amount Derivatives subject to netting arrangements: Interest rate contracts $ 7,328 $ 6,529 $ 799 $ 666 $ — $ 133 Foreign exchange contracts 2,560 1,645 915 12 — 903 Equity and other contracts 112 54 58 57 — 1 Total derivatives subject to netting arrangements 10,000 8,228 1,772 735 — 1,037 Total derivatives not subject to netting arrangements 632 — 632 — — 632 Total derivatives 10,632 8,228 2,404 735 — 1,669 Repurchase agreements 9,777 502 (b) 9,275 9,275 — — Securities lending 1,501 — 1,501 1,417 — 84 Total $ 21,910 $ 8,730 $ 13,180 $ 11,427 $ — $ 1,753 (a) Includes the effect of netting agreements and net cash collateral paid. The offset related to the OTC derivatives was allocated to the various types of derivatives based on the net positions. (b) Offsetting of repurchase agreements relates to our involvement in the Fixed Income Clearing Corporation, where we settle government securities transactions on a net basis for payment and delivery through the Fedwire system. Offsetting of derivative liabilities and financial liabilities at Dec. 31, 2016 Net liabilities recognized on the balance sheet Gross liabilities recognized Gross amounts offset in the balance sheet Gross amounts not offset in the balance sheet (in millions) (a) Financial instruments Cash collateral pledged Net amount Derivatives subject to netting arrangements: Interest rate contracts $ 8,116 $ 6,634 $ 1,482 $ 1,266 $ — $ 216 Foreign exchange contracts 4,957 3,363 1,594 355 — 1,239 Equity and other contracts 104 50 54 54 — — Total derivatives subject to netting arrangements 13,177 10,047 3,130 1,675 — 1,455 Total derivatives not subject to netting arrangements 1,271 — 1,271 — — 1,271 Total derivatives 14,448 10,047 4,401 1,675 — 2,726 Repurchase agreements 8,703 481 (b) 8,222 8,222 — — Securities lending 1,615 — 1,615 1,522 — 93 Total $ 24,766 $ 10,528 $ 14,238 $ 11,419 $ — $ 2,819 (a) Includes the effect of netting agreements and net cash collateral paid. The offset related to the OTC derivatives was allocated to the various types of derivatives based on the net positions. (b) Offsetting of repurchase agreements relates to our involvement in the Fixed Income Clearing Corporation, where we settle government securities transactions on a net basis for payment and delivery through the Fedwire system. Secured borrowings The following tables present the contract value of repurchase agreements and securities lending transactions accounted for as secured borrowings by the type of collateral provided to counterparties. Repurchase agreements and securities lending transactions accounted for as secured borrowings at March 31, 2017 Remaining contractual maturity of the agreements (in millions) Overnight and continuous Up to 30 days 30 days or more Total Repurchase agreements: U.S. Treasury $ 3,014 $ 13 $ — $ 3,027 U.S. government agencies 523 64 — 587 Agency RMBS 2,551 348 — 2,899 Corporate bonds 428 — 1,138 1,566 Other debt securities 616 — 390 1,006 Equity securities 435 — 257 692 Total $ 7,567 $ 425 $ 1,785 $ 9,777 Securities lending: U.S. government agencies $ 45 $ — $ — $ 45 Other debt securities 389 — — 389 Equity securities 1,067 — — 1,067 Total $ 1,501 $ — $ — $ 1,501 Total borrowings $ 9,068 $ 425 $ 1,785 $ 11,278 Repurchase agreements and securities lending transactions accounted for as secured borrowings at Dec. 31, 2016 Remaining contractual maturity of the agreements (in millions) Overnight and continuous Up to 30 days 30 days or more Total Repurchase agreements: U.S. Treasury $ 2,488 $ 4 $ — $ 2,492 U.S. government agencies 396 10 — 406 Agency RMBS 3,294 386 — 3,680 Corporate bonds 304 — 694 998 Other debt securities 146 — 563 709 Equity securities 375 — 43 418 Total $ 7,003 $ 400 $ 1,300 $ 8,703 Securities lending: U.S. government agencies $ 39 $ — $ — $ 39 Other debt securities 477 — — 477 Equity securities 1,099 — — 1,099 Total $ 1,615 $ — $ — $ 1,615 Total borrowings $ 8,618 $ 400 $ 1,300 $ 10,318 BNY Mellon’s repurchase agreements and securities lending transactions primarily encounter risk associated with liquidity. We are required to pledge collateral based on predetermined terms within the agreements. If we were to experience a decline in the fair value of the collateral pledged for these transactions, we could be required to provide additional collateral to the counterparty, therefore decreasing the amount of assets available for other liquidity needs that may arise. BNY Mellon also offers tri-party collateral agency services in the tri-party repo market where we are exposed to credit risk. In order to mitigate this risk, we require dealers to fully secure intraday credit.

Lines of business

Lines of business	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Lines of business	Lines of business We have an internal information system that produces performance data along product and service lines for our two principal businesses and the Other segment. Business accounting principles Our business data has been determined on an internal management basis of accounting, rather than the generally accepted accounting principles used for consolidated financial reporting. These measurement principles are designed so that reported results of the businesses will track their economic performance. Business results are subject to reclassification when organizational changes are made or when improvements are made in the measurement principles. The accounting policies of the businesses are the same as those described in Note 1 of the Notes to Consolidated Financial Statements in our 2016 Annual Report. The primary types of revenue for our two principal businesses and the Other segment are presented below: Business Primary types of revenue Investment Management • Investment management and performance fees from: Mutual funds Institutional clients Private clients High net worth individuals and families, endowments and foundations and related entities • Distribution and servicing fees • Other revenue from seed capital investments Investment Services • Asset servicing fees, including custody fees, fund services, broker-dealer services, securities finance and collateral and liquidity services • Issuer services fees, including Depositary Receipts and Corporate Trust • Clearing services fees • Treasury services fees, including global payments, trade finance and cash management • Foreign exchange revenue • Financing-related fees and net interest revenue from credit-related activities Other segment • Net interest revenue and lease-related gains (losses) from leasing operations • Gain (loss) on securities and net interest revenue from corporate treasury activity • Other trading revenue from derivatives and other trading activity • Results of business exits The results of our businesses are presented and analyzed on an internal management reporting basis: • Revenue amounts reflect fee and other revenue generated by each business. Fee and other revenue transferred between businesses under revenue transfer agreements is included within other revenue in each business. • Revenues and expenses associated with specific client bases are included in those businesses. For example, foreign exchange activity associated with clients using custody products is included in Investment Services. • Net interest revenue is allocated to businesses based on the yields on the assets and liabilities generated by each business. We employ a funds transfer pricing system that matches funds with the specific assets and liabilities of each business based on their interest sensitivity and maturity characteristics. • The provision for credit losses associated with the respective credit portfolios is reflected in each business segment. • Incentive expense related to restricted stock is allocated to the businesses. • Support and other indirect expenses are allocated to businesses based on internally developed methodologies. • Recurring FDIC expense is allocated to the businesses based on average deposits generated within each business. • Litigation expense is generally recorded in the business in which the charge occurs. • Management of the investment securities portfolio is a shared service contained in the Other segment. As a result, gains and losses associated with the valuation of the securities portfolio are included in the Other segment. • Client deposits serve as the primary funding source for our investment securities portfolio. We typically allocate all interest revenue to the businesses generating the deposits. Accordingly, accretion related to the portion of the investment securities portfolio restructured in 2009 has been included in the results of the businesses. • M&I expense is a corporate level item and is recorded in the Other segment. • Restructuring charges relate to corporate-level initiatives and were therefore recorded in the Other segment. • Balance sheet assets and liabilities and their related income or expense are specifically assigned to each business. Businesses with a net liability position have been allocated assets. • Goodwill and intangible assets are reflected within individual businesses. The following consolidating schedules show the contribution of our businesses to our overall profitability. For the quarter ended March 31, 2017 Investment Investment Other Consolidated (dollar amounts in millions) Fee and other revenue $ 877 (a) $ 2,084 $ 72 $ 3,033 (a) Net interest revenue (expense) 86 707 (1 ) 792 Total revenue 963 (a) 2,791 71 3,825 (a) Provision for credit losses 3 — (8 ) (5 ) Noninterest expense 683 1,849 107 2,639 (b) Income (loss) before taxes $ 277 (a) $ 942 $ (28 ) $ 1,191 (a)(b) Pre-tax operating margin (c) 29 % 34 % N/M 31 % Average assets $ 31,067 $ 251,027 $ 54,106 $ 336,200 (a) Both fee and other revenue and total revenue include the net income from consolidated investment management funds of $15 million representing $33 million of income and noncontrolling interests of $18 million . Income before taxes is net of noncontrolling interests of $18 million . (b) Noninterest expense includes a loss attributable to noncontrolling interest of $3 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the quarter ended Dec. 31, 2016 Investment Management Investment Services Other Consolidated (dollar amounts in millions) Fee and other revenue $ 880 (a) $ 2,032 $ 42 $ 2,954 (a) Net interest revenue 80 713 38 831 Total revenue 960 (a) 2,745 80 3,785 (a) Provision for credit losses 6 — 1 7 Noninterest expense 694 1,824 110 2,628 (b) Income (loss) before taxes $ 260 (a) $ 921 $ (31 ) $ 1,150 (a)(b) Pre-tax operating margin (c) 27 % 34 % N/M 30 % Average assets $ 30,529 $ 269,036 $ 44,577 $ 344,142 (a) Both fee and other revenue and total revenue include the net income from consolidated investment management funds of $ 1 million , representing $5 million of income and noncontrolling interests of $4 million. Income before taxes is net of noncontrolling interests of $4 million. (b) Noninterest expense includes a loss attributable to noncontrolling interest of $ 3 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the quarter ended March 31, 2016 Investment Investment Other Consolidated (dollar amounts in millions) Fee and other revenue $ 812 (a) $ 2,030 $ 129 $ 2,971 (a) Net interest revenue 83 679 4 766 Total revenue 895 (a) 2,709 133 3,737 (a) Provision for credit losses (1 ) 14 (3 ) 10 Noninterest expense 679 1,808 140 2,627 (b) Income (loss) before taxes $ 217 (a) $ 887 $ (4 ) $ 1,100 (a)(b) Pre-tax operating margin (c) 24 % 33 % N/M 29 % Average assets $ 29,971 $ 273,289 $ 61,294 $ 364,554 (a) Both fee and other revenue and total revenue include net income from consolidated investment management funds of $ 1 million , representing $6 million of losses and a loss attributable to noncontrolling interests of $7 million. Income (loss) before taxes is net of a loss attributable to noncontrolling interests of $7 million. (b) Noninterest expense includes a loss attributable to noncontrolling interest of $ 2 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful.

Supplemental information to the

Supplemental information to the Consolidated Statement of Cash Flows	3 Months Ended
	Mar. 31, 2017
Supplemental Cash Flow Information [Abstract]
Supplemental information to the Consolidated Statement of Cash Flows	Supplemental information to the Consolidated Statement of Cash Flows Noncash investing and financing transactions that, appropriately, are not reflected in the Consolidated Statement of Cash Flows are listed below. Noncash investing and financing transactions Three months ended March 31, (in millions) 2017 2016 Transfers from loans to other assets for other real estate owned (“OREO”) $ 1 $ 1 Change in assets of consolidated VIEs 204 101 Change in liabilities of consolidated VIEs 106 8 Change in nonredeemable noncontrolling interests of consolidated investment management funds 84 81 Securities purchased not settled 580 86 Securities sales not settled 81 356 Premises and equipment/capitalized software funded by capital lease obligations 1 2

Basis of presentation (Policies

Basis of presentation (Policies)	3 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Other-than-temporary impairment	Other-than-temporary impairment We routinely conduct periodic reviews of all securities to determine whether OTTI has occurred. Such reviews may incorporate the use of economic models. Various inputs to the economic models are used to determine if an unrealized loss on securities is other-than-temporary. For example, the most significant inputs related to non-agency RMBS are: • Default rate - the number of mortgage loans expected to go into default over the life of the transaction, which is driven by the roll rate of loans in each performance bucket that will ultimately migrate to default; and • Severity - the loss expected to be realized when a loan defaults. To determine if an unrealized loss is other-than-temporary, we project total estimated defaults of the underlying assets (mortgages) and multiply that calculated amount by an estimate of realizable value upon sale of these assets in the marketplace (severity) in order to determine the projected collateral loss. In determining estimated default rate and severity assumptions, we review the performance of the underlying securities, industry studies, market forecasts, as well as our view of the economic outlook affecting collateral. We also evaluate the current credit enhancement underlying the bond to determine the impact on cash flows. If we determine that a given security will be subject to a write-down or loss, we record the expected credit loss as a charge to earnings.
Fair value measurement	Fair value measurement Fair value is defined as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants at the measurement date. A three-level hierarchy for fair value measurements is utilized based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. BNY Mellon’s own creditworthiness is considered when valuing liabilities. See Note 18 of the Notes to Consolidated Financial Statements in our 2016 Annual Report for information on how we determine fair value and the fair value hierarchy. The following tables present the financial instruments carried at fair value at March 31, 2017 and Dec. 31, 2016 , by caption on the consolidated balance sheet and by the three-level valuation hierarchy. We have included credit ratings information in certain of the tables because the information indicates the degree of credit risk to which we are exposed, and significant changes in ratings classifications could result in increased risk for us.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2017
Securities [Abstract]
Amortized Cost and Fair Values of Securities	The following tables present the amortized cost, the gross unrealized gains and losses and the fair value of securities at March 31, 2017 and Dec. 31, 2016 . Securities at March 31, 2017 Gross unrealized Amortized cost Fair value (in millions) Gains Losses Available-for-sale: U.S. Treasury $ 15,692 $ 133 $ 158 $ 15,667 U.S. government agencies 357 1 7 351 State and political subdivisions 3,294 54 43 3,305 Agency RMBS 22,912 142 320 22,734 Non-agency RMBS 577 30 10 597 Other RMBS 454 4 7 451 Commercial MBS 913 7 9 911 Agency commercial MBS 7,148 36 73 7,111 CLOs 2,561 9 — 2,570 Other asset-backed securities 1,454 5 3 1,456 Foreign covered bonds 2,052 22 7 2,067 Corporate bonds 1,361 20 15 1,366 Sovereign debt/sovereign guaranteed 11,976 218 23 12,171 Other debt securities 2,659 18 8 2,669 Equity securities 2 1 — 3 Money market funds 853 — — 853 Non-agency RMBS (a) 1,016 287 5 1,298 Total securities available-for-sale (b) $ 75,281 $ 987 $ 688 $ 75,580 Held-to-maturity: U.S. Treasury $ 10,596 $ 20 $ 37 $ 10,579 U.S. government agencies 1,614 — 6 1,608 State and political subdivisions 18 — 1 17 Agency RMBS 25,132 85 271 24,946 Non-agency RMBS 71 4 2 73 Other RMBS 136 — 4 132 Commercial MBS 7 — — 7 Agency commercial MBS 829 2 10 821 Foreign covered bonds 75 2 — 77 Sovereign debt/sovereign guaranteed 1,750 31 1 1,780 Other debt securities 26 — — 26 Total securities held-to-maturity $ 40,254 $ 144 $ 332 $ 40,066 Total securities $ 115,535 $ 1,131 $ 1,020 $ 115,646 (a) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (b) Includes gross unrealized gains of $59 million and gross unrealized losses of $179 million recorded in accumulated other comprehensive income related to investment securities that were transferred from available-for-sale to held-to-maturity. The unrealized gains and losses are primarily related to Agency RMBS and will be amortized into net interest revenue over the contractual lives of the securities. Securities at Dec. 31, 2016 Gross Amortized cost Fair value (in millions) Gains Losses Available-for-sale: U.S. Treasury $ 14,373 $ 115 $ 181 $ 14,307 U.S. government agencies 366 2 9 359 State and political subdivisions 3,392 38 52 3,378 Agency RMBS 22,929 148 341 22,736 Non-agency RMBS 620 31 13 638 Other RMBS 517 4 8 513 Commercial MBS 931 8 11 928 Agency commercial MBS 6,505 28 84 6,449 CLOs 2,593 6 1 2,598 Other asset-backed securities 1,729 4 6 1,727 Foreign covered bonds 2,126 24 9 2,141 Corporate bonds 1,391 22 17 1,396 Sovereign debt/sovereign guaranteed 12,248 261 20 12,489 Other debt securities 1,952 19 10 1,961 Equity securities 2 1 — 3 Money market funds 842 — — 842 Non-agency RMBS (a) 1,080 286 9 1,357 Total securities available-for-sale (b) $ 73,596 $ 997 $ 771 $ 73,822 Held-to-maturity: U.S. Treasury $ 11,117 $ 22 $ 41 $ 11,098 U.S. government agencies 1,589 — 6 1,583 State and political subdivisions 19 — 1 18 Agency RMBS 25,221 57 299 24,979 Non-agency RMBS 78 4 2 80 Other RMBS 142 — 4 138 Commercial MBS 7 — — 7 Agency commercial MBS 721 1 10 712 Foreign covered bonds 74 1 — 75 Sovereign debt/sovereign guaranteed 1,911 42 — 1,953 Other debt securities 26 — — 26 Total securities held-to-maturity $ 40,905 $ 127 $ 363 $ 40,669 Total securities $ 114,501 $ 1,124 $ 1,134 $ 114,491 (a) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (b) Includes gross unrealized gains of $62 million and gross unrealized losses of $190 million recorded in accumulated other comprehensive income related to investment securities that were transferred from available-for-sale to held-to-maturity. The unrealized gains and losses are primarily related to Agency RMBS and will be amortized into net interest revenue over the contractual lives of the securities.
Schedule of Realized Gain (Loss)	The following table presents the gross securities gains, losses and impairments. Net securities gains (losses) (in millions) 1Q17 4Q16 1Q16 Realized gross gains $ 11 $ 15 $ 22 Realized gross losses — (3 ) — Recognized gross impairments (1 ) (2 ) (2 ) Total net securities gains $ 10 $ 10 $ 20
Aggregate Fair Value of Investments with Continuous Unrealized Loss Position	The following tables show the aggregate related fair value of investments with a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 months or more at March 31, 2017 and Dec. 31, 2016 . Temporarily impaired securities at March 31, 2017 Less than 12 months 12 months or more Total (in millions) Fair Unrealized Fair Unrealized Fair Unrealized Available-for-sale: U.S. Treasury $ 9,290 $ 158 $ — $ — $ 9,290 $ 158 U.S. government agencies 300 7 — — 300 7 State and political subdivisions 593 24 129 19 722 43 Agency RMBS 13,412 132 1,771 188 15,183 320 Non-agency RMBS 27 — 319 10 346 10 Other RMBS 7 — 148 7 155 7 Commercial MBS 360 7 149 2 509 9 Agency commercial MBS 2,542 65 651 8 3,193 73 Other asset-backed securities 243 — 182 3 425 3 Corporate bonds 562 15 8 — 570 15 Sovereign debt/sovereign guaranteed 1,488 23 57 — 1,545 23 Non-agency RMBS (a) 31 1 36 4 67 5 Other debt securities 853 8 25 — 878 8 Foreign covered bonds 773 7 — — 773 7 Total securities available-for-sale (b) $ 30,481 $ 447 $ 3,475 $ 241 $ 33,956 $ 688 Held-to-maturity: U.S. Treasury $ 8,166 $ 37 $ — $ — $ 8,166 $ 37 U.S. government agencies 1,558 6 — — 1,558 6 State and political subdivisions — — 4 1 4 1 Agency RMBS 19,369 268 177 3 19,546 271 Non-agency RMBS 3 — 45 2 48 2 Agency commercial MBS 558 10 — — 558 10 Sovereign debt/sovereign guaranteed 156 1 — — 156 1 Other RMBS — — 110 4 110 4 Total securities held-to-maturity $ 29,810 $ 322 $ 336 $ 10 $ 30,146 $ 332 Total temporarily impaired securities $ 60,291 $ 769 $ 3,811 $ 251 $ 64,102 $ 1,020 (a) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (b) Gross unrealized losses for 12 months or more of $179 million were recorded in accumulated other comprehensive income and related to investment securities that were transferred from available-for-sale to held-to-maturity. The unrealized losses are primarily related to Agency RMBS and will be amortized into net interest revenue over the contractual lives of the securities. There were no gross unrealized losses for less than 12 months. Temporarily impaired securities at Dec. 31, 2016 Less than 12 months 12 months or more Total (in millions) Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses Available-for-sale: U.S. Treasury $ 8,489 $ 181 $ — $ — $ 8,489 $ 181 U.S. government agencies 257 9 — — 257 9 State and political subdivisions 1,058 33 131 19 1,189 52 Agency RMBS 14,766 141 1,673 200 16,439 341 Non-agency RMBS 21 — 332 13 353 13 Other RMBS 26 — 136 8 162 8 Commercial MBS 302 7 163 4 465 11 Agency commercial MBS 3,570 78 589 6 4,159 84 CLOs 443 1 404 — 847 1 Other asset-backed securities 276 1 357 5 633 6 Corporate bonds 594 16 7 1 601 17 Sovereign debt/sovereign guaranteed 1,521 20 63 — 1,584 20 Non-agency RMBS (a) 25 — 47 9 72 9 Other debt securities 742 10 50 — 792 10 Foreign covered bonds 712 9 — — 712 9 Total securities available-for-sale (b) $ 32,802 $ 506 $ 3,952 $ 265 $ 36,754 $ 771 Held-to-maturity: U.S. Treasury $ 6,112 $ 41 $ — $ — $ 6,112 $ 41 U.S. government agencies 1,533 6 — — 1,533 6 State and political subdivisions — — 4 1 4 1 Agency RMBS 19,498 297 102 2 19,600 299 Non-agency RMBS 4 — 48 2 52 2 Agency commercial MBS 621 10 — — 621 10 Other RMBS 15 — 123 4 138 4 Total securities held-to-maturity $ 27,783 $ 354 $ 277 $ 9 $ 28,060 $ 363 Total temporarily impaired securities $ 60,585 $ 860 $ 4,229 $ 274 $ 64,814 $ 1,134 (a) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (b) Includes gross unrealized losses for 12 months or more of $190 million recorded in accumulated other comprehensive income related to investment securities that were transferred from available-for-sale to held-to-maturity. The unrealized losses are primarily related to Agency RMBS and will be amortized into net interest revenue over the contractual lives of the securities. There were no gross unrealized losses for less than 12 months.
Maturity Distribution by Carrying Amount and Yield (on Tax Equivalent Basis) of Investment Securities Portfolio	The following table shows the maturity distribution by carrying amount and yield (on a tax equivalent basis) of our investment securities portfolio at March 31, 2017 . Maturity distribution and yield on investment securities at March 31, 2017 U.S. Treasury U.S. government agencies State and political subdivisions Other bonds, notes and debentures Mortgage/ asset-backed and equity securities (dollars in millions) Amount Yield (a) Amount Yield (a) Amount Yield (a) Amount Yield (a) Amount Yield (a) Total Securities available-for-sale: One year or less $ 2,934 0.98 % $ — — % $ 276 2.55 % $ 3,580 0.94 % $ — — % $ 6,790 Over 1 through 5 years 5,057 1.51 114 1.30 1,732 2.98 12,348 1.02 — — 19,251 Over 5 through 10 years 4,302 1.88 237 2.35 1,085 3.52 2,177 1.09 — — 7,801 Over 10 years 3,374 3.11 — — 212 2.04 168 1.67 — — 3,754 Mortgage-backed securities — — — — — — — — 33,102 2.75 33,102 Asset-backed securities — — — — — — — — 4,026 2.10 4,026 Equity securities (b) — — — — — — — — 856 — 856 Total $ 15,667 1.86 % $ 351 2.01 % $ 3,305 3.06 % $ 18,273 1.02 % $ 37,984 2.62 % $ 75,580 Securities held-to-maturity: One year or less $ 3,999 0.89 % $ 475 0.91 % $ — — % $ 438 0.62 % $ — — % $ 4,912 Over 1 through 5 years 5,092 1.47 1,089 1.23 1 7.06 752 0.62 — — 6,934 Over 5 through 10 years 1,505 1.94 50 2.02 3 6.71 661 0.71 — — 2,219 Over 10 years — — — — 14 5.34 — — — — 14 Mortgage-backed securities — — — — — — — — 26,175 2.75 26,175 Total $ 10,596 1.32 % $ 1,614 1.16 % $ 18 5.69 % $ 1,851 0.65 % $ 26,175 2.75 % $ 40,254 (a) Yields are based upon the amortized cost of securities. (b) Includes money market funds.
Projected Weighted-Average Default Rates and Loss Severities	The table below shows the projected weighted-average default rates and loss severities for the 2007, 2006 and late 2005 non-agency RMBS and the securities previously held in the Grantor Trust that we established in connection with the restructuring of our investment securities portfolio in 2009, at March 31, 2017 and Dec. 31, 2016 . Projected weighted-average default rates and loss severities March 31, 2017 Dec. 31, 2016 Default rate Severity Default rate Severity Alt-A 30 % 54 % 30 % 54 % Subprime 49 % 67 % 49 % 70 % Prime 18 % 39 % 18 % 39 %
Pre-Tax Securities Gains (Losses) by Type	The following table presents pre-tax net securities gains (losses) by type. Net securities gains (losses) (in millions) 1Q17 4Q16 1Q16 Agency RMBS $ 1 $ — $ 8 Non-agency RMBS (1 ) 7 (2 ) Other 10 3 14 Total net securities gains $ 10 $ 10 $ 20
Debt Securities Credit Losses Roll Forward Recorded in Earnings	The following table reflects investment securities credit losses recorded in earnings. The beginning balance represents the credit loss component for which OTTI occurred on debt securities in prior periods. The additions represent the first time a debt security was credit impaired or when subsequent credit impairments have occurred. The deductions represent credit losses on securities that have been sold, are required to be sold, or for which it is our intention to sell. Debt securities credit loss roll forward (in millions) 1Q17 1Q16 Beginning balance as of Jan.1 $ 88 $ 91 Add: Initial OTTI credit losses — — Subsequent OTTI credit losses 1 2 Less: Realized losses for securities sold — — Ending balance as of March 31 $ 89 $ 93

Loans and asset quality (Tables

Loans and asset quality (Tables)	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Schedule of Loan Portfolio and Industry Concentrations of Credit Risk	The table below provides the details of our loan portfolio and industry concentrations of credit risk at March 31, 2017 and Dec. 31, 2016 . Loans March 31, 2017 Dec. 31, 2016 (in millions) Domestic: Financial institutions $ 5,387 $ 6,342 Commercial 2,543 2,286 Wealth management loans and mortgages 15,909 15,555 Commercial real estate 4,698 4,639 Lease financings 846 989 Other residential mortgages 817 854 Overdrafts 673 1,055 Other 1,119 1,202 Margin loans 16,081 17,503 Total domestic 48,073 50,425 Foreign: Financial institutions 7,954 8,347 Commercial 347 331 Wealth management loans and mortgages 114 99 Commercial real estate 19 15 Lease financings 739 736 Other (primarily overdrafts) 3,554 4,418 Margin loans 68 87 Total foreign 12,795 14,033 Total loans (a) $ 60,868 $ 64,458 (a) Net of unearned income of $511 million at March 31, 2017 and $527 million at Dec. 31, 2016 primarily on domestic and foreign lease financings.
Summary of Transactions in the Allowance for Credit Losses	Transactions in the allowance for credit losses are summarized as follows. Allowance for credit losses activity for the quarter ended March 31, 2017 Wealth management loans and mortgages Other residential mortgages (in millions) Commercial Commercial real estate Financial institutions Lease financings All Other Foreign Total Beginning balance $ 82 $ 73 $ 26 $ 13 $ 23 $ 28 $ — $ 36 $ 281 Charge-offs — — — — — (1 ) — — (1 ) Recoveries — — — — — 1 — — 1 Net recoveries — — — — — — — — — Provision — — (3 ) (3 ) 3 (3 ) — 1 (5 ) Ending balance $ 82 $ 73 $ 23 $ 10 $ 26 $ 25 $ — $ 37 $ 276 Allowance for: Loan losses $ 24 $ 54 $ 5 $ 10 $ 22 $ 25 $ — $ 24 $ 164 Lending-related commitments 58 19 18 — 4 — — 13 112 Individually evaluated for impairment: Loan balance $ — $ — $ — $ — $ 5 $ — $ — $ — $ 5 Allowance for loan losses — — — — 3 — — — 3 Collectively evaluated for impairment: Loan balance $ 2,543 $ 4,698 $ 5,387 $ 846 $ 15,904 $ 817 $ 17,873 (a) $ 12,795 $ 60,863 Allowance for loan losses 24 54 5 10 19 25 — 24 161 (a) Includes $673 million of domestic overdrafts, $16,081 million of margin loans and $1,119 million of other loans at March 31, 2017 . Allowance for credit losses activity for the quarter ended Dec. 31, 2016 Wealth management loans and mortgages Other residential mortgages (in millions) Commercial Commercial real estate Financial institutions Lease financings All Other Foreign Total Beginning balance $ 91 $ 63 $ 29 $ 14 $ 18 $ 28 $ — $ 31 $ 274 Charge-offs — — — — — (1 ) — — (1 ) Recoveries — — — — — 1 — — 1 Net recoveries — — — — — — — — — Provision (9 ) 10 (3 ) (1 ) 5 — — 5 7 Ending balance $ 82 $ 73 $ 26 $ 13 $ 23 $ 28 $ — $ 36 $ 281 Allowance for: Loan losses $ 25 $ 52 $ 8 $ 13 $ 19 $ 28 $ — $ 24 $ 169 Lending-related commitments 57 21 18 — 4 — — 12 112 Individually evaluated for impairment: Loan balance $ — $ — $ — $ 4 $ 5 $ — $ — $ — $ 9 Allowance for loan losses — — — 2 3 — — — 5 Collectively evaluated for impairment: Loan balance $ 2,286 $ 4,639 $ 6,342 $ 985 $ 15,550 $ 854 $ 19,760 (a) $ 14,033 $ 64,449 Allowance for loan losses 25 52 8 11 16 28 — 24 164 (a) Includes $1,055 million of domestic overdrafts, $17,503 million of margin loans and $1,202 million of other loans at Dec. 31, 2016 . Allowance for credit losses activity for the quarter ended March 31, 2016 Wealth management loans and mortgages Other residential mortgages All Other Foreign Total (in millions) Commercial Commercial real estate Financial institutions Lease financings Beginning balance $ 82 $ 59 $ 31 $ 15 $ 19 $ 34 $ — $ 35 $ 275 Charge-offs — — — — — — — — — Recoveries — — — — — 2 — — 2 Net recoveries — — — — — 2 — — 2 Provision 6 3 1 1 (1 ) (4 ) — 4 10 Ending balance $ 88 $ 62 $ 32 $ 16 $ 18 $ 32 $ — $ 39 $ 287 Allowance for: Loan losses $ 25 $ 40 $ 11 $ 16 $ 15 $ 32 $ — $ 23 $ 162 Lending-related commitments 63 22 21 — 3 — — 16 125 Individually evaluated for impairment: Loan balance $ — $ 2 $ 171 $ 5 $ 8 $ — $ — $ — $ 186 Allowance for loan losses — 1 — 2 1 — — — 4 Collectively evaluated for impairment: Loan balance $ 2,130 $ 3,927 $ 5,415 $ 973 $ 13,874 $ 993 $ 20,697 (a) $ 13,044 $ 61,053 Allowance for loan losses 25 39 11 14 14 32 — 23 158 (a) Includes $917 million of domestic overdrafts, $18,674 million of margin loans and $1,106 million of other loans at March 31, 2016 .
Distribution of Nonperforming Assets	The table below presents the distribution of our nonperforming assets. Nonperforming assets (in millions) March 31, 2017 Dec. 31, 2016 Nonperforming loans: Other residential mortgages $ 88 $ 91 Wealth management loans and mortgages 10 8 Lease financings — 4 Total nonperforming loans 98 103 Other assets owned 9 4 Total nonperforming assets $ 107 $ 107
Schedule of Lost Interest Income	The table below presents the amount of lost interest income. Lost interest (in millions) 1Q17 4Q16 1Q16 Amount by which interest income recognized on nonperforming loans exceeded reversals $ — $ — $ — Amount by which interest income would have increased if nonperforming loans at period end had been performing for the entire period $ 1 $ 1 $ 1
Information about Impaired Loans	The tables below provide information about our impaired loans. We use the discounted cash flow method as the primary method for valuing impaired loans. Impaired loans Quarter ended March 31, 2017 Dec. 31, 2016 March 31, 2016 (in millions) Average recorded investment Interest Average recorded investment Interest income recognized Average recorded investment Interest income recognized Impaired loans with an allowance: Commercial real estate $ — $ — $ — $ — $ 1 $ — Wealth management loans and mortgages 3 — 2 — 6 — Lease financings 2 — 4 — 2 — Total impaired loans with an allowance 5 — 6 — 9 — Impaired loans without an allowance : Commercial real estate — — — — 1 — Financial institutions — — — — 171 — Wealth management loans and mortgages 2 — 3 — 2 — Total impaired loans without an allowance (a) 2 — 3 — 174 — Total impaired loans $ 7 $ — $ 9 $ — $ 183 $ — (a) When the discounted cash flows, collateral value or market price equals or exceeds the carrying value of the loan, then the loan does not require an allowance under the accounting standard related to impaired loans. Impaired loans March 31, 2017 Dec. 31, 2016 (in millions) Recorded investment Unpaid principal balance Related allowance (a) Recorded investment Unpaid principal balance Related allowance (a) Impaired loans with an allowance: Commercial real estate $ — $ 3 $ — $ — $ 3 $ — Wealth management loans and mortgages 3 3 3 3 3 3 Lease financings — — — 4 4 2 Total impaired loans with an allowance 3 6 3 7 10 5 Impaired loans without an allowance : Wealth management loans and mortgages 2 2 N/A 2 2 N/A Total impaired loans without an allowance (b) 2 2 N/A 2 2 N/A Total impaired loans (c) $ 5 $ 8 $ 3 $ 9 $ 12 $ 5 (a) The allowance for impaired loans is included in the allowance for loan losses. (b) When the discounted cash flows, collateral value or market price equals or exceeds the carrying value of the loan, then the loan does not require an allowance under the accounting standard related to impaired loans. (c) Excludes an aggregate of less than $1 million of impaired loans in amounts individually less than $1 million at both March 31, 2017 and Dec. 31, 2016 , respectively. The allowance for loan loss associated with these loans totaled less than $1 million at both March 31, 2017 and Dec. 31, 2016 , respectively.
Information about Past Due Loans	The table below sets forth information about our past due loans. Past due loans and still accruing interest March 31, 2017 Dec. 31, 2016 Days past due Total past due Days past due Total past due (in millions) 30-59 60-89 >90 30-59 60-89 >90 Wealth management loans and mortgages $ 25 $ 3 $ — $ 28 $ 21 $ 2 $ — $ 23 Commercial real estate 21 — — 21 78 — — 78 Other residential mortgages 13 2 4 19 20 6 7 33 Financial institutions — — — — 1 27 — 28 Total past due loans $ 59 $ 5 $ 4 $ 68 $ 120 $ 35 $ 7 $ 162
Troubled Debt Restructurings	The following table presents TDRs that occurred in the first quarter of 2017 , fourth quarter of 2016 and first quarter of 2016 . TDRs 1Q17 4Q16 1Q16 Outstanding recorded investment Outstanding recorded investment Outstanding recorded investment (dollars in millions) Number of contracts Pre-modification Post-modification Number of contracts Pre-modification Post-modification Number of contracts Pre-modification Post-modification Other residential mortgages 6 $ 2 $ 2 17 $ 3 $ 4 13 $ 3 $ 3 Wealth management loans and mortgages 1 4 4 — — — 2 — — Total TDRs 7 $ 6 $ 6 17 $ 3 $ 4 15 $ 3 $ 3
Credit Quality Indicators - Commercial Portfolio - Credit Risk Profile by Creditworthiness Category	The following tables set forth information about credit quality indicators. Commercial loan portfolio Commercial loan portfolio – Credit risk profile by creditworthiness category Commercial Commercial real estate Financial institutions March 31, Dec. 31, 2016 March 31, Dec. 31, 2016 March 31, Dec. 31, 2016 (in millions) Investment grade $ 2,697 $ 2,397 $ 3,903 $ 3,823 $ 10,255 $ 11,459 Non-investment grade 193 220 814 831 3,086 3,230 Total $ 2,890 $ 2,617 $ 4,717 $ 4,654 $ 13,341 $ 14,689
Credit Quality Indicators - Wealth Management Loans and Mortgages - Credit Risk Profile by Internally Assigned Grade	Wealth management loans and mortgages Wealth management loans and mortgages – Credit risk profile by internally assigned grade (in millions) March 31, Dec. 31, 2016 Wealth management loans: Investment grade $ 7,300 $ 7,127 Non-investment grade 155 260 Wealth management mortgages 8,568 8,267 Total $ 16,023 $ 15,654

Goodwill and intangible assets

Goodwill and intangible assets (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Breakdown of Goodwill by Business	The tables below provide a breakdown of goodwill by business. Goodwill by business (in millions) Investment Investment Other Consolidated Balance at Dec. 31, 2016 $ 9,000 $ 8,269 $ 47 $ 17,316 Foreign currency translation 21 18 — 39 Balance at March 31, 2017 $ 9,021 $ 8,287 $ 47 $ 17,355 Goodwill by business (in millions) Investment Investment Other Consolidated Balance at Dec. 31, 2015 $ 9,207 $ 8,366 $ 45 $ 17,618 Foreign currency translation (32 ) 18 — (14 ) Balance at March 31, 2016 $ 9,175 $ 8,384 $ 45 $ 17,604
Breakdown of Intangible Assets by Business	The tables below provide a breakdown of intangible assets by business. Intangible assets – net carrying amount by business (in millions) Investment Investment Other Consolidated Balance at Dec. 31, 2016 $ 1,717 $ 1,032 $ 849 $ 3,598 Amortization (15 ) (37 ) — (52 ) Foreign currency translation 3 — — 3 Balance at March 31, 2017 $ 1,705 $ 995 $ 849 $ 3,549 Intangible assets – net carrying amount by business (in millions) Investment Investment Other Consolidated Balance at Dec. 31, 2015 $ 1,807 $ 1,186 $ 849 $ 3,842 Amortization (19 ) (38 ) — (57 ) Foreign currency translation (6 ) 2 — (4 ) Balance at March 31, 2016 $ 1,782 $ 1,150 $ 849 $ 3,781
Breakdown of Intangible Assets by Type	The table below provides a breakdown of intangible assets by type. Intangible assets March 31, 2017 Dec. 31, 2016 (in millions) Gross carrying amount Accumulated amortization Net carrying amount Remaining weighted- average amortization period Gross Accumulated Net carrying amount Subject to amortization : (a) Customer relationships—Investment Management $ 1,444 $ (1,154 ) $ 290 11 years $ 1,439 $ (1,136 ) $ 303 Customer contracts—Investment Services 2,251 (1,629 ) 622 10 years 2,249 (1,590 ) 659 Other 38 (34 ) 4 2 years 37 (33 ) 4 Total subject to amortization 3,733 (2,817 ) 916 10 years 3,725 (2,759 ) 966 Not subject to amortization: (b) Trade name 1,348 N/A 1,348 N/A 1,348 N/A 1,348 Customer relationships 1,285 N/A 1,285 N/A 1,284 N/A 1,284 Total not subject to amortization 2,633 N/A 2,633 N/A 2,632 N/A 2,632 Total intangible assets $ 6,366 $ (2,817 ) $ 3,549 N/A $ 6,357 $ (2,759 ) $ 3,598 (a) Excludes fully amortized intangible assets. (b) Intangible assets not subject to amortization have an indefinite life.
Estimated Annual Amortization Expense	Estimated annual amortization expense for current intangibles for the next five years is as follows: For the year ended Estimated amortization expense (in millions) 2017 $ 208 2018 178 2019 108 2020 98 2021 75

Other assets (Tables)

Other assets (Tables)	3 Months Ended
	Mar. 31, 2017
Other Assets [Abstract]
Other Assets	Other assets March 31, 2017 Dec. 31, 2016 (in millions) Corporate/bank-owned life insurance $ 4,806 $ 4,789 Accounts receivable 4,684 4,060 Fails to deliver 2,260 1,732 Software 1,458 1,451 Renewable energy investments 1,266 1,282 Income taxes receivable 1,214 1,172 Equity in a joint venture and other investments 1,067 1,063 Tax advantaged low income housing investments 900 914 Prepaid pension assets 874 836 Prepaid expenses 522 438 Fair value of hedging derivatives 482 784 Federal Reserve Bank stock 469 466 Seed capital 303 395 Due from customers on acceptances 129 340 Private equity 46 43 Other 1,035 1,189 Total other assets $ 21,515 $ 20,954
Seed Capital and Private Equity Investments Valued Using Net Asset Value	The table below presents information about BNY Mellon’s investments in seed capital and private equity investments that have been valued using NAV. Seed capital and private equity investments valued using NAV March 31, 2017 Dec. 31, 2016 (dollar amounts in millions) Fair value Unfunded commitments Redemption frequency Redemption notice period Fair value Unfunded commitments Redemption frequency Redemption notice period Seed capital and other funds (a) $ 104 $ 1 Daily-quarterly 1-95 days $ 171 $ 1 Daily-quarterly 1-180 days Private equity investments (SBICs) (b) 46 45 N/A N/A 43 46 N/A N/A Total $ 150 $ 46 $ 214 $ 47 (a) Other funds include various leveraged loans, hedge funds and structured credit funds. Redemption notice periods vary by fund. (b) Private equity investments primarily include Volcker Rule-compliant investments in SBICs that invest in various sectors of the economy. Private equity investments do not have redemption rights. Distributions from such investments will be received as the underlying investments in the private equity investments are liquidated.

Net interest revenue (Tables)

Net interest revenue (Tables)	3 Months Ended
	Mar. 31, 2017
Interest Revenue (Expense), Net [Abstract]
Components of Net Interest Revenue	The following table provides the components of net interest revenue presented on the consolidated income statement. Net interest revenue Quarter ended March 31, 2017 Dec. 31, 2016 March 31, 2016 (in millions) Interest revenue Non-margin loans $ 245 $ 236 $ 205 Margin loans 75 71 63 Securities: Taxable 461 465 444 Exempt from federal income taxes 17 17 18 Total securities 478 482 462 Deposits with banks 22 28 26 Deposits with the Federal Reserve and other central banks 57 28 61 Federal funds sold and securities purchased under resale agreements 67 66 49 Trading assets 16 17 17 Total interest revenue 960 928 883 Interest expense Deposits 9 (5 ) 15 Federal funds purchased and securities sold under repurchase agreements 24 8 9 Trading liabilities 2 1 2 Other borrowed funds 2 3 2 Commercial paper 5 — — Customer payables 7 3 4 Long-term debt 119 87 85 Total interest expense 168 97 117 Net interest revenue 792 831 766 Provision for credit losses (5 ) 7 10 Net interest revenue after provision for credit losses $ 797 $ 824 $ 756

Employee benefit plans (Tables)

Employee benefit plans (Tables)	3 Months Ended
	Mar. 31, 2017
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Net Periodic Benefit (Credit) Cost	The components of net periodic benefit (credit) cost are as follows. Net periodic benefit (credit) cost Quarter ended March 31, 2017 March 31, 2016 (in millions) Domestic pension benefits Foreign pension benefits Health care benefits Domestic pension benefits Foreign pension benefits Health care benefits Service cost $ — $ 7 $ — $ — $ 8 $ 1 Interest cost 45 8 2 45 9 2 Expected return on assets (81 ) (12 ) (2 ) (82 ) (13 ) (2 ) Other 17 9 (1 ) 18 4 (1 ) Net periodic benefit (credit) cost $ (19 ) $ 12 $ (1 ) $ (19 ) $ 8 $ —

Securitizations and variable 37

Securitizations and variable interest entities (Tables)	3 Months Ended
	Mar. 31, 2017
Variable Interest Entity [Line Items]
Incremental Assets and Liabilities Included in Consolidated Financial Statements	March 31, 2017 and Dec. 31, 2016 . The net assets of any consolidated VIE are solely available to settle the liabilities of the VIE and to settle any investors’ ownership liquidation requests, including any seed capital invested in the VIE by BNY Mellon. Investments consolidated at March 31, 2017 (in millions) Investment Management funds Securitizations Total consolidated investments Available-for-sale securities $ — $ 400 $ 400 Trading assets 883 — 883 Other assets 144 — 144 Total assets $ 1,027 (a) $ 400 $ 1,427 Other liabilities $ 209 $ 364 $ 573 Total liabilities $ 209 (a) $ 364 $ 573 Nonredeemable noncontrolling interests $ 534 (a) $ — $ 534 (a) Includes voting model entities (“VMEs”) with assets of $85 million , liabilities of $1 million and nonredeemable noncontrolling interests of $14 million . Investments consolidated at Dec. 31, 2016 (in millions) Investment Management funds Securitizations Total consolidated investments Available-for-sale securities $ — $ 400 $ 400 Trading assets 979 — 979 Other assets 252 — 252 Total assets $ 1,231 (a) $ 400 $ 1,631 Trading liabilities $ 282 $ — $ 282 Other liabilities 33 363 396 Total liabilities $ 315 (a) $ 363 $ 678 Nonredeemable noncontrolling interests $ 618 (a) $ — $ 618 (a) Includes VMEs with assets of $114 million , liabilities of $3 million and nonredeemable noncontrolling interests of $25 million .
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	March 31, 2017 and Dec. 31, 2016 , the following assets and liabilities related to the VIEs where BNY Mellon is not the primary beneficiary are included in our consolidated financial statements. Non-consolidated VIEs at March 31, 2017 (in millions) Assets Liabilities Maximum loss exposure Other $ 2,451 $ 355 $ 2,806 Non-consolidated VIEs at Dec. 31, 2016 (in millions) Assets Liabilities Maximum loss exposure Other $ 2,442 $ 369 $ 2,811

Preferred stock (Tables)

Preferred stock (Tables)	3 Months Ended
	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Preferred Stock Summary	BNY Mellon has 100 million authorized shares of preferred stock with a par value of $0.01 per share. The following table summarizes BNY Mellon’s preferred stock issued and outstanding at March 31, 2017 and Dec. 31, 2016 . Preferred stock summary (a) Total shares issued and outstanding Carrying value (b) (in millions) Per annum dividend rate March 31, 2017 Dec. 31, 2016 March 31, 2017 Dec. 31, 2016 Series A Greater of (i) three-month LIBOR plus 0.565% for the related distribution period; or (ii) 4.000% 5,001 5,001 $ 500 $ 500 Series C 5.2% 5,825 5,825 568 568 Series D 4.50% to but excluding June 20, 2023, then a floating rate equal to the three-month LIBOR plus 2.46% 5,000 5,000 494 494 Series E 4.95% to and including June 20, 2020, then a floating rate equal to the three-month LIBOR plus 3.42% 10,000 10,000 990 990 Series F 4.625% to and including Sept. 20, 2026, then a floating rate equal to the three-month LIBOR plus 3.131% 10,000 10,000 990 990 Total 35,826 35,826 $ 3,542 $ 3,542 (a) All outstanding preferred stock is noncumulative perpetual preferred stock with a liquidation preference of $100,000 per share. (b) The carrying value of the Series C, Series D, Series E and Series F preferred stock is recorded net of issuance costs. The following table summarizes BNY Mellon’s preferred stock issued and outstanding at March 31, 2017 and Dec. 31, 2016 . Preferred stock summary (a) Total shares issued and outstanding Carrying value (b) (in millions) Per annum dividend rate March 31, 2017 Dec. 31, 2016 March 31, 2017 Dec. 31, 2016 Series A Greater of (i) three-month LIBOR plus 0.565% for the related distribution period; or (ii) 4.000% 5,001 5,001 $ 500 $ 500 Series C 5.2% 5,825 5,825 568 568 Series D 4.50% to but excluding June 20, 2023, then a floating rate equal to the three-month LIBOR plus 2.46% 5,000 5,000 494 494 Series E 4.95% to and including June 20, 2020, then a floating rate equal to the three-month LIBOR plus 3.42% 10,000 10,000 990 990 Series F 4.625% to and including Sept. 20, 2026, then a floating rate equal to the three-month LIBOR plus 3.131% 10,000 10,000 990 990 Total 35,826 35,826 $ 3,542 $ 3,542 (a) All outstanding preferred stock is noncumulative perpetual preferred stock with a liquidation preference of $100,000 per share. (b) The carrying value of the Series C, Series D, Series E and Series F preferred stock is recorded net of issuance costs.

Other comprehensive income (l39

Other comprehensive income (loss) (Tables)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Components of Other Comprehensive Income (Loss)	Components of other comprehensive income (loss) Quarter ended March 31, 2017 Dec. 31, 2016 March 31, 2016 (in millions) Pre-tax amount Tax (expense) benefit After-tax amount Pre-tax amount Tax (expense) benefit After-tax amount Pre-tax amount Tax (expense) benefit After-tax amount Foreign currency translation: Foreign currency translation adjustments arising during the period (a) $ 96 $ 29 $ 125 $ (295 ) $ (122 ) $ (417 ) $ 45 $ (8 ) $ 37 Total foreign currency translation 96 29 125 (295 ) (122 ) (417 ) 45 (8 ) 37 Unrealized gain (loss) on assets available-for-sale: Unrealized gain (loss) arising during period 164 (70 ) 94 (726 ) 257 (469 ) 243 (80 ) 163 Reclassification adjustment (b) (10 ) 4 (6 ) (10 ) 4 (6 ) (20 ) 5 (15 ) Net unrealized gain (loss) on assets available-for-sale 154 (66 ) 88 (736 ) 261 (475 ) 223 (75 ) 148 Defined benefit plans: Net gain (loss) arising during the period 3 (1 ) 2 (154 ) 44 (110 ) 3 (1 ) 2 Foreign exchange adjustment — — — (1 ) 1 — — — — Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost (b) 25 (7 ) 18 23 (9 ) 14 22 (7 ) 15 Total defined benefit plans 28 (8 ) 20 (132 ) 36 (96 ) 25 (8 ) 17 Unrealized gain (loss) on cash flow hedges: Unrealized hedge gain (loss) arising during period 14 (5 ) 9 63 (20 ) 43 (81 ) 27 (54 ) Reclassification adjustment (b) 1 — 1 (65 ) 22 (43 ) 86 (29 ) 57 Net unrealized gain (loss) on cash flow hedges 15 (5 ) 10 (2 ) 2 — 5 (2 ) 3 Total other comprehensive income (loss) $ 293 $ (50 ) $ 243 $ (1,165 ) $ 177 $ (988 ) $ 298 $ (93 ) $ 205 (a) Includes the impact of hedges of net investments in foreign subsidiaries. See Note 16 for additional information. (b) The reclassification adjustment related to the unrealized gain (loss) on assets available-for-sale is recorded as net securities gains on the Consolidated Income Statement. The amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost is recorded as staff expense on the Consolidated Income Statement. See Note 16 of the Notes to Consolidated Financial Statements for the location of the reclassification adjustment related to cash flow hedges on the Consolidated Income Statement.

Fair value measurement (Tables)

Fair value measurement (Tables)	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	The following tables present the financial instruments carried at fair value at March 31, 2017 and Dec. 31, 2016 , by caption on the consolidated balance sheet and by the three-level valuation hierarchy. We have included credit ratings information in certain of the tables because the information indicates the degree of credit risk to which we are exposed, and significant changes in ratings classifications could result in increased risk for us. There were no material transfers between Level 1 and Level 2 during the first quarter of 2017 . Assets measured at fair value on a recurring basis at March 31, 2017 Total carrying (dollar amounts in millions) Level 1 Level 2 Level 3 Netting (a) Available-for-sale securities: U.S. Treasury $ 15,667 $ — $ — $ — $ 15,667 U.S. government agencies — 351 — — 351 Sovereign debt/sovereign guaranteed 68 12,103 — — 12,171 State and political subdivisions — 3,305 — — 3,305 Agency RMBS — 22,734 — — 22,734 Non-agency RMBS — 597 — — 597 Other RMBS — 451 — — 451 Commercial MBS — 911 — — 911 Agency commercial MBS — 7,111 — — 7,111 CLOs — 2,570 — — 2,570 Other asset-backed securities — 1,456 — — 1,456 Equity securities 3 — — — 3 Money market funds (b) 853 — — — 853 Corporate bonds — 1,366 — — 1,366 Other debt securities — 2,669 — — 2,669 Foreign covered bonds 1,897 170 — — 2,067 Non-agency RMBS (c) — 1,298 — — 1,298 Total available-for-sale securities 18,488 57,092 — — 75,580 Trading assets: Debt and equity instruments (b) 340 2,109 — — 2,449 Derivative assets not designated as hedging: Interest rate 3 6,885 — (5,365 ) 1,523 Foreign exchange — 3,119 — (2,195 ) 924 Equity and other contracts — 51 — (35 ) 16 Total derivative assets not designated as hedging 3 10,055 — (7,595 ) 2,463 Total trading assets 343 12,164 — (7,595 ) 4,912 Other assets: Derivative assets designated as hedging: Interest rate — 327 — — 327 Foreign exchange — 155 — — 155 Total derivative assets designated as hedging — 482 — — 482 Other assets (d) 283 41 — — 324 Other assets measured at net asset value (d) 150 Total other assets 283 523 — — 956 Subtotal assets of operations at fair value 19,114 69,779 — (7,595 ) 81,448 Percentage of assets prior to netting 22 % 78 % — % Assets of consolidated investment management funds 363 664 — — 1,027 Total assets $ 19,477 $ 70,443 $ — $ (7,595 ) $ 82,475 Percentage of assets prior to netting 22 % 78 % — % Liabilities measured at fair value on a recurring basis at March 31, 2017 Total carrying (dollar amounts in millions) Level 1 Level 2 Level 3 Netting (a) Trading liabilities: Debt and equity instruments $ 777 $ 190 $ — $ — $ 967 Derivative liabilities not designated as hedging: Interest rate 2 6,899 — (6,529 ) 372 Foreign exchange — 3,055 — (1,645 ) 1,410 Equity and other contracts — 121 — (54 ) 67 Total derivative liabilities not designated as hedging 2 10,075 — (8,228 ) 1,849 Total trading liabilities 779 10,265 — (8,228 ) 2,816 Long-term debt (b) — 364 — — 364 Other liabilities – derivative liabilities designated as hedging: Interest rate — 467 — — 467 Foreign exchange — 88 — — 88 Total other liabilities – derivative liabilities designated as hedging — 555 — — 555 Subtotal liabilities of operations at fair value 779 11,184 — (8,228 ) 3,735 Percentage of liabilities prior to netting 7 % 93 % — % Liabilities of consolidated investment management funds 1 208 — — 209 Total liabilities $ 780 $ 11,392 $ — $ (8,228 ) $ 3,944 Percentage of liabilities prior to netting 6 % 94 % — % (a) ASC 815, Derivatives and Hedging, permits the netting of derivative receivables and derivative payables under legally enforceable master netting agreements and permits the netting of cash collateral. Netting is applicable to derivatives not designated as hedging instruments included in trading assets or trading liabilities, and derivatives designated as hedging instruments included in other assets or other liabilities. Netting is allocated to the derivative products based on the net fair value of each product. (b) Includes certain interests in securitizations. (c) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (d) Includes private equity investments and seed capital. Assets measured at fair value on a recurring basis at Dec. 31, 2016 Total carrying value (dollar amounts in millions) Level 1 Level 2 Level 3 Netting (a) Available-for-sale securities: U.S. Treasury $ 14,307 $ — $ — $ — $ 14,307 U.S. government agencies — 359 — — 359 Sovereign debt/sovereign guaranteed 66 12,423 — — 12,489 State and political subdivisions — 3,378 — — 3,378 Agency RMBS — 22,736 — — 22,736 Non-agency RMBS — 638 — — 638 Other RMBS — 513 — — 513 Commercial MBS — 928 — — 928 Agency commercial MBS — 6,449 — — 6,449 CLOs — 2,598 — — 2,598 Other asset-backed securities — 1,727 — — 1,727 Equity securities 3 — — — 3 Money market funds (b) 842 — — — 842 Corporate bonds — 1,396 — — 1,396 Other debt securities — 1,961 — — 1,961 Foreign covered bonds 1,876 265 — — 2,141 Non-agency RMBS (c) — 1,357 — — 1,357 Total available-for-sale securities 17,094 56,728 — — 73,822 Trading assets: Debt and equity instruments (b) 240 2,013 — — 2,253 Derivative assets not designated as hedging: Interest rate 4 7,583 — (6,047 ) 1,540 Foreign exchange — 6,104 — (4,172 ) 1,932 Equity and other contracts — 46 — (38 ) 8 Total derivative assets not designated as hedging 4 13,733 — (10,257 ) 3,480 Total trading assets 244 15,746 — (10,257 ) 5,733 Other assets : Derivative assets designated as hedging: Interest rate — 415 — — 415 Foreign exchange — 369 — — 369 Total derivative assets designated as hedging — 784 — — 784 Other assets (d) 268 73 — — 341 Other assets measured at net asset value (d) 214 Total other assets 268 857 — — 1,339 Subtotal assets of operations at fair value 17,606 73,331 — (10,257 ) 80,894 Percentage of assets prior to netting 19 % 81 % — % Assets of consolidated investment management funds 464 767 — — 1,231 Total assets $ 18,070 $ 74,098 $ — $ (10,257 ) $ 82,125 Percentage of assets prior to netting 20 % 80 % — % Liabilities measured at fair value on a recurring basis at Dec. 31, 2016 Total carrying value (dollar amounts in millions) Level 1 Level 2 Level 3 Netting (a) Trading liabilities: Debt and equity instruments $ 349 $ 236 $ — $ — $ 585 Derivative liabilities not designated as hedging: Interest rate 4 7,629 — (6,634 ) 999 Foreign exchange — 6,103 — (3,363 ) 2,740 Equity and other contracts — 115 — (50 ) 65 Total derivative liabilities not designated as hedging 4 13,847 — (10,047 ) 3,804 Total trading liabilities 353 14,083 — (10,047 ) 4,389 Long-term debt ( b ) — 363 — — 363 Other liabilities – derivative liabilities designated as hedging: Interest rate — 545 — — 545 Foreign exchange — 52 — — 52 Total other liabilities – derivative liabilities designated as hedging — 597 — — 597 Subtotal liabilities of operations at fair value 353 15,043 — (10,047 ) 5,349 Percentage of liabilities prior to netting 2 % 98 % — % Liabilities of consolidated investment management funds 3 312 — — 315 Total liabilities $ 356 $ 15,355 $ — $ (10,047 ) $ 5,664 Percentage of liabilities prior to netting 2 % 98 % — % (a) ASC 815, Derivatives and Hedging, permits the netting of derivative receivables and derivative payables under legally enforceable master netting agreements and permits the netting of cash collateral. Netting is applicable to derivatives not designated as hedging instruments included in trading assets or trading liabilities, and derivatives designated as hedging instruments included in other assets or other liabilities. Netting is allocated to the derivative products based on the net fair value of each product. (b) Includes certain interests in securitizations. (c) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011. (d) Includes private equity investments and seed capital.
Details Of Certain Items Measured At Fair Value on Recurring Basis	Details of certain items measured at fair value on a recurring basis March 31, 2017 Dec. 31, 2016 Total carrying value (a) Ratings Total carrying value (a) Ratings AAA/ AA- A+/ A- BBB+/ BBB- BB+ and lower AAA/ AA- A+/ A- BBB+/ BBB- BB+ and lower (dollar amounts in millions) Non-agency RMBS, originated in: 2007 $ 51 — % — % — % 100 % $ 58 — % — % — % 100 % 2006 93 — — — 100 98 — — — 100 2005 169 24 3 7 66 180 23 5 9 63 2004 and earlier 284 5 3 23 69 302 5 3 24 68 Total non-agency RMBS $ 597 9 % 2 % 13 % 76 % $ 638 9 % 3 % 14 % 74 % Commercial MBS - Domestic, originated in: 2009-2017 $ 705 86 % 14 % — % — % $ 674 84 % 16 % — % — % 2008 13 100 — — — 14 100 — — — 2007 142 62 38 — — 190 71 29 — — 2006 2 6 3 — 91 3 7 93 — — Total commercial MBS - Domestic $ 862 82 % 18 % — % — % $ 881 81 % 19 % — % — % Foreign covered bonds: Canada $ 1,468 100 % — % — % — % $ 1,320 100 % — % — % — % United Kingdom 112 100 — — — 280 100 — — — Netherlands 162 100 — — — 160 100 — — — Other 325 100 — — — 381 100 — — — Total foreign covered bonds $ 2,067 100 % — % — % — % $ 2,141 100 % — % — % — % European floating rate notes - available-for-sale: United Kingdom $ 321 88 % 12 % — % — % $ 379 90 % 10 % — % — % Netherlands 121 100 — — — 125 100 — — — Ireland 58 — — 100 — 58 — — 100 — Total European floating rate notes - available-for-sale $ 500 81 % 7 % 12 % — % $ 562 83 % 7 % 10 % — % Sovereign debt/sovereign guaranteed: United Kingdom $ 2,816 100 % — % — % — % $ 3,209 100 % — % — % — % France 2,005 100 — — — 1,998 100 — — — Spain 1,774 — — 100 — 1,749 — — 100 — Germany 1,394 100 — — — 1,347 100 — — — Italy 1,138 — — 100 — 1,130 — — 100 — Netherlands 1,019 100 — — — 1,061 100 — — — Belgium 958 100 — — — 1,005 100 — — — Ireland 735 — 100 — — 736 — 100 — — Other (b) 332 58 — — 42 254 71 — — 29 Total sovereign debt/sovereign guaranteed $ 12,171 69 % 6 % 24 % 1 % $ 12,489 70 % 6 % 23 % 1 % Non-agency RMBS (c) , originated in: 2007 $ 376 — % — % — % 100 % $ 387 — % — % — % 100 % 2006 373 — — — 100 391 — — — 100 2005 414 — 2 1 97 437 — 2 1 97 2004 and earlier 135 2 2 17 79 142 2 2 17 79 Total non-agency RMBS (c) $ 1,298 — % 1 % 2 % 97 % $ 1,357 — % 1 % 2 % 97 % (a) At March 31, 2017 and Dec. 31, 2016 , foreign covered bonds and sovereign debt were included in Level 1 and Level 2 in the valuation hierarchy. All other assets in the table are Level 2 assets in the valuation hierarchy. (b) Included noninvestment grade sovereign debt related to Brazil of $140 million at March 31, 2017 and $73 million at Dec. 31, 2016 . (c) Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011.
Unobservable Input Reconciliation of Assets and Liabilities Measured on a Recurring Basis	The table below includes a roll forward of the balance sheet amount for the quarter ended March 31, 2016 (including the change in fair value), for financial instruments classified in Level 3 of the valuation hierarchy. Fair value measurements for assets using significant unobservable inputs for the quarter ended March 31, 2016 (in millions) Loans Fair value at Dec. 31, 2015 $ — Transfers into Level 3 19 Total gains or (losses) for the period included in earnings 2 (a) Purchases 48 Fair value at March 31, 2016 $ 69 Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period $ 2 (a) Reported in investment and other income.
Assets Measured at Fair Value on Nonrecurring Basis	The following tables present the financial instruments carried on the consolidated balance sheet by caption and by level in the fair value hierarchy as of March 31, 2017 and Dec. 31, 2016 , for which a nonrecurring change in fair value has been recorded during the quarters ended March 31, 2017 and Dec. 31, 2016 . Assets measured at fair value on a nonrecurring basis at March 31, 2017 Total carrying value (in millions) Level 1 Level 2 Level 3 Loans (a) $ — $ 83 $ 3 $ 86 Other assets (b) — 5 35 40 Total assets at fair value on a nonrecurring basis $ — $ 88 $ 38 $ 126 Assets measured at fair value on a nonrecurring basis at Dec. 31, 2016 Total carrying value (in millions) Level 1 Level 2 Level 3 Loans (a) $ — $ 84 $ 7 $ 91 Other assets (b) — 4 — 4 Total assets at fair value on a nonrecurring basis $ — $ 88 $ 7 $ 95 (a) During the quarters ended March 31, 2017 and Dec. 31, 2016 , the fair value of these loans decreased less than $1 million and $1 million , respectively, based on the fair value of the underlying collateral based on guidance in ASC 310, Receivables, with an offset to the allowance for credit losses. (b) Includes other assets received in satisfaction of debt.
Summary of Financial Instruments Not Carried at Fair Value	The following tables present the estimated fair value and the carrying amount of financial instruments not carried at fair value on the consolidated balance sheet at March 31, 2017 and Dec. 31, 2016 , by caption on the consolidated balance sheet and by the valuation hierarchy. See Note 18 of the Notes to Consolidated Financial Statements in our 2016 Annual Report for additional information regarding the financial instruments within the scope of this disclosure, and the methods and significant assumptions used to estimate their fair value. Summary of financial instruments March 31, 2017 (in millions) Level 1 Level 2 Level 3 Total estimated fair value Carrying amount Assets: Interest-bearing deposits with the Federal Reserve and other central banks $ — $ 65,086 $ — $ 65,086 $ 65,086 Interest-bearing deposits with banks — 14,554 — 14,554 14,554 Federal funds sold and securities purchased under resale agreements — 25,776 — 25,776 25,776 Securities held-to-maturity 10,656 29,410 — 40,066 40,254 Loans (a) — 59,399 — 59,399 59,119 Other financial assets 5,366 1,098 — 6,464 6,464 Total $ 16,022 $ 195,323 $ — $ 211,345 $ 211,253 Liabilities: Noninterest-bearing deposits $ — $ 79,771 $ — $ 79,771 $ 79,771 Interest-bearing deposits — 139,777 — 139,777 141,520 Federal funds purchased and securities sold under repurchase agreements — 11,149 — 11,149 11,149 Payables to customers and broker-dealers — 21,306 — 21,306 21,306 Commercial paper — 2,543 — 2,543 2,543 Borrowings — 1,185 — 1,185 1,185 Long-term debt — 26,149 — 26,149 25,982 Total $ — $ 281,880 $ — $ 281,880 $ 283,456 (a) Does not include the leasing portfolio. Summary of financial instruments Dec. 31, 2016 (in millions) Level 1 Level 2 Level 3 Total estimated Carrying Assets: Interest-bearing deposits with the Federal Reserve and other central banks $ — $ 58,041 $ — $ 58,041 $ 58,041 Interest-bearing deposits with banks — 15,091 — 15,091 15,086 Federal funds sold and securities purchased under resale agreements — 25,801 — 25,801 25,801 Securities held-to-maturity 11,173 29,496 — 40,669 40,905 Loans (a) — 62,829 — 62,829 62,564 Other financial assets 4,822 1,112 — 5,934 5,934 Total $ 15,995 $ 192,370 $ — $ 208,365 $ 208,331 Liabilities: Noninterest-bearing deposits $ — $ 78,342 $ — $ 78,342 $ 78,342 Interest-bearing deposits — 141,418 — 141,418 143,148 Federal funds purchased and securities sold under repurchase agreements — 9,989 — 9,989 9,989 Payables to customers and broker-dealers — 20,987 — 20,987 20,987 Borrowings — 960 — 960 960 Long-term debt — 24,184 — 24,184 24,100 Total $ — $ 275,880 $ — $ 275,880 $ 277,526 (a) Does not include the leasing portfolio.
Summary of the Carrying Amount, Notional Amount and Unrealized Gain (Loss) of Hedged Financial Instruments	The table below summarizes the carrying amount of the hedged financial instruments, the notional amount of the hedge and the unrealized gain (loss) (estimated fair value) of the derivatives. Hedged financial instruments Carrying amount Notional amount of hedge Unrealized (in millions) Gain (Loss) March 31, 2017 Securities available-for-sale $ 10,494 $ 10,549 $ 96 $ (271 ) Long-term debt 22,192 22,200 228 (196 ) Dec. 31, 2016 Securities available-for-sale $ 9,184 $ 9,233 $ 83 $ (342 ) Long-term debt 20,511 20,450 330 (203 )

Fair value option (Tables)

Fair value option (Tables)	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities, by Type, of Consolidated Investment Management Funds Recorded at Fair Value	The following table presents the assets and liabilities, by type, of consolidated investment management funds recorded at fair value. Assets and liabilities of consolidated investment management funds, at fair value March 31, 2017 Dec. 31, 2016 (in millions) Assets of consolidated investment management funds: Trading assets $ 883 $ 979 Other assets 144 252 Total assets of consolidated investment management funds $ 1,027 $ 1,231 Liabilities of consolidated investment management funds: Trading liabilities $ — $ 282 Other liabilities 209 33 Total liabilities of consolidated investment management funds $ 209 $ 315
Changes in Fair Value of the Loans and Long-Term Debt and the Location of the Changes	The following table presents the changes in fair value of long-term debt and certain loans for which we elected the fair value option that we previously held in 2016, and the location of the changes in the consolidated income statement. Impact of changes in fair value in the income statement (a) Quarter ended (in millions) March 31, 2017 Dec. 31, 2016 March 31, 2016 Loans: Investment and other income $ — $ (1 ) $ 9 Long-term debt: Foreign exchange and other trading (loss) revenue $ (1 ) $ 13 $ (13 ) (a) The changes in fair value of the loans and long-term debt are approximately offset by economic hedges included in foreign exchange and other trading revenue.

Commitments and contingent li42

Commitments and contingent liabilities (Tables)	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Significant Industry Concentrations Related to Credit Exposure	Significant industry concentrations related to credit exposure at March 31, 2017 are disclosed in the financial institutions portfolio exposure and the commercial portfolio exposure tables below. Financial institutions portfolio exposure (in billions) March 31, 2017 Loans Unfunded commitments Total exposure Securities industry $ 3.1 $ 19.3 $ 22.4 Banks 7.2 1.9 9.1 Asset managers 1.6 6.2 7.8 Insurance 0.1 3.5 3.6 Government 0.1 0.9 1.0 Other 1.2 1.6 2.8 Total $ 13.3 $ 33.4 $ 46.7 Commercial portfolio exposure (in billions) March 31, 2017 Loans Unfunded commitments Total exposure Manufacturing $ 1.4 $ 6.6 $ 8.0 Energy and utilities 0.5 4.7 5.2 Services and other 0.7 4.2 4.9 Media and telecom 0.3 1.8 2.1 Total $ 2.9 $ 17.3 $ 20.2
Summary of Off-Balance Sheet Credit Risks, Net of Participations	The following table presents a summary of our off-balance sheet credit risks, net of participations. Off-balance sheet credit risks March 31, 2017 Dec. 31, 2016 (in millions) Lending commitments $ 51,293 $ 51,270 Standby letters of credit (a) 3,932 4,185 Commercial letters of credit 286 339 Securities lending indemnifications (b) 338,705 317,690 (a) Net of participations totaling $684 million at March 31, 2017 and $662 million at Dec. 31, 2016 . (b) Excludes the indemnification for securities for which BNY Mellon acts as an agent on behalf of CIBC Mellon clients , which totaled $64 billion at March 31, 2017 and $61 billion at Dec. 31, 2016 .
Standby Letters of Credits by Investment Grade	The table below shows SBLCs by investment grade: Standby letters of credit March 31, 2017 Dec. 31, 2016 Investment grade 88 % 89 % Non-investment grade 12 % 11 %

Derivative instruments (Tables)

Derivative instruments (Tables)	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Ineffectiveness Related to Derivatives and Hedging Relationships Recorded in Income	Ineffectiveness related to derivatives and hedging relationships was recorded in income as follows: Ineffectiveness Quarter ended (in millions) March 31, 2017 Dec. 31, 2016 March 31, 2016 Fair value hedges of securities $ 0.6 $ 7.0 $ (1.1 ) Fair value hedges of long-term debt (4.8 ) 17.8 (12.5 ) Cash flow hedges — — — Other (a) — — — Total $ (4.2 ) $ 24.8 $ (13.6 ) (a) Includes ineffectiveness recorded on foreign exchange hedges.
Impact of Derivative Instruments on Balance Sheet	The following table summarizes the notional amount and credit exposure of our total derivative portfolio at March 31, 2017 and Dec. 31, 2016 . Impact of derivative instruments on the balance sheet Notional value Asset derivatives fair value Liability derivatives fair value (in millions) March 31, 2017 Dec. 31, 2016 March 31, 2017 Dec. 31, 2016 March 31, 2017 Dec. 31, 2016 Derivatives designated as hedging instruments: (a) Interest rate contracts $ 32,749 $ 29,683 $ 327 $ 415 $ 467 $ 545 Foreign exchange contracts 7,605 7,796 155 369 88 52 Total derivatives designated as hedging instruments $ 482 $ 784 $ 555 $ 597 Derivatives not designated as hedging instruments: (b) Interest rate contracts $ 291,694 $ 325,412 $ 6,888 $ 7,587 $ 6,901 $ 7,633 Foreign exchange contracts 564,599 530,729 3,119 6,104 3,055 6,103 Equity contracts 1,236 1,167 51 46 118 112 Credit contracts 160 160 — — 3 3 Total derivatives not designated as hedging instruments $ 10,058 $ 13,737 $ 10,077 $ 13,851 Total derivatives fair value (c) $ 10,540 $ 14,521 $ 10,632 $ 14,448 Effect of master netting agreements (d) (7,595 ) (10,257 ) (8,228 ) (10,047 ) Fair value after effect of master netting agreements $ 2,945 $ 4,264 $ 2,404 $ 4,401 (a) The fair value of asset derivatives and liability derivatives designated as hedging instruments is recorded as other assets and other liabilities, respectively, on the balance sheet. (b) The fair value of asset derivatives and liability derivatives not designated as hedging instruments is recorded as trading assets and trading liabilities, respectively, on the balance sheet. (c) Fair values are on a gross basis, before consideration of master netting agreements, as required by ASC 815, Derivatives and Hedging. (d) Effect of master netting agreements includes cash collateral received and paid of $752 million and $1,385 million , respectively, at March 31, 2017 , and $1,119 million and $909 million , respectively, at Dec. 31, 2016 .
Impact of Derivative Instruments on Income Statement	Impact of derivative instruments on the income statement (in millions) Derivatives in fair value hedging relationships Location of gain or (loss) recognized in income on derivatives Gain or (loss) recognized in income on derivatives Location of gain or(loss) recognized in income on hedged item Gain or (loss) recognized in hedged item 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 Interest rate contracts Net interest revenue $ 10 $ 171 $ (148 ) Net interest revenue $ (14 ) $ (147 ) $ 134 Derivatives in cash flow hedging relationships Gain or (loss) recognized in accumulated OCI on derivatives (effective portion) Location of gain or (loss) reclassified from accumulated OCI into income (effective portion) Gain or (loss) reclassified from accumulated OCI into income (effective portion) Location of gain or (loss) recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing) Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing) 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 FX contracts $ — $ (2 ) $ 6 Net interest revenue $ — $ (2 ) $ 5 Net interest revenue $ — $ — $ — FX contracts — — — Other revenue — — — Other revenue — — — FX contracts 3 73 (89 ) Trading revenue 3 73 (89 ) Trading revenue — — — FX contracts 11 (8 ) 2 Salary expense (4 ) (6 ) (2 ) Salary expense — — — Total $ 14 $ 63 $ (81 ) $ (1 ) $ 65 $ (86 ) $ — $ — $ — Derivatives in net investment hedging relationships Gain or (loss) recognized in accumulated OCI on derivatives (effective portion) Location of gain or (loss) reclassified from accumulated OCI into income (effective portion) Gain or (loss) reclassified from accumulated OCI into income (effective portion) Location of gain or (loss) recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing) Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing) 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 1Q17 4Q16 1Q16 FX contracts $ (96 ) $ 332 $ (58 ) Net interest revenue $ — $ — $ — Other revenue $ — $ — $ —
Revenue from Foreign Exchange and Other Trading	Revenue from foreign exchange and other trading included the following: Foreign exchange and other trading revenue (in millions) 1Q17 4Q16 1Q16 Foreign exchange $ 154 $ 175 $ 171 Other trading revenue (loss) 10 (14 ) 4 Total foreign exchange and other trading revenue $ 164 $ 161 $ 175
Fair Value of Derivative Contracts Falling under Early Termination Provisions that were in Net Liability Position	The following table shows the fair value of contracts falling under early termination provisions that were in net liability positions as of March 31, 2017 for three key ratings triggers: If The Bank of New York Mellon’s rating was changed to (Moody’s/S&P) Potential close-out exposures (fair value) (a) A3/A- $ 26 million Baa2/BBB $ 540 million Ba1/BB+ $ 1,483 million (a) The amounts represent potential total close-out values if The Bank of New York Mellon’s rating were to immediately drop to the indicated levels.
Offsetting Assets	The following tables present derivative instruments and financial instruments that are either subject to an enforceable netting agreement or offset by collateral arrangements. There were no derivative instruments or financial instruments subject to a legally enforceable netting agreement for which we are not currently netting. Offsetting of derivative assets and financial assets at March 31, 2017 Gross assets recognized Gross amounts offset in the balance sheet Net assets recognized on the balance sheet Gross amounts not offset in the balance sheet (in millions) (a) Financial instruments Cash collateral received Net amount Derivatives subject to netting arrangements: Interest rate contracts $ 6,582 $ 5,365 $ 1,217 $ 277 $ — $ 940 Foreign exchange contracts 2,779 2,195 584 73 — 511 Equity and other contracts 51 35 16 — — 16 Total derivatives subject to netting arrangements 9,412 7,595 1,817 350 — 1,467 Total derivatives not subject to netting arrangements 1,128 — 1,128 — — 1,128 Total derivatives 10,540 7,595 2,945 350 — 2,595 Reverse repurchase agreements 16,730 502 (b) 16,228 16,228 — — Securities borrowing 9,548 — 9,548 9,267 — 281 Total $ 36,818 $ 8,097 $ 28,721 $ 25,845 $ — $ 2,876 (a) Includes the effect of netting agreements and net cash collateral received. The offset related to the OTC derivatives was allocated to the various types of derivatives based on the net positions. (b) Offsetting of reverse repurchase agreements relates to our involvement in the Fixed Income Clearing Corporation, where we settle government securities transactions on a net basis for payment and delivery through the Fedwire system. Offsetting of derivative assets and financial assets at Dec. 31, 2016 Gross assets recognized Gross amounts offset in the balance sheet Net assets recognized on the balance sheet Gross amounts not offset in the balance sheet (in millions) (a) Financial instruments Cash collateral received Net amount Derivatives subject to netting arrangements: Interest rate contracts $ 7,205 $ 6,047 $ 1,158 $ 321 $ — $ 837 Foreign exchange contracts 5,265 4,172 1,093 202 — 891 Equity and other contracts 44 38 6 — — 6 Total derivatives subject to netting arrangements 12,514 10,257 2,257 523 — 1,734 Total derivatives not subject to netting arrangements 2,007 — 2,007 — — 2,007 Total derivatives 14,521 10,257 4,264 523 — 3,741 Reverse repurchase agreements 17,588 481 (b) 17,107 17,104 — 3 Securities borrowing 8,694 — 8,694 8,425 — 269 Total $ 40,803 $ 10,738 $ 30,065 $ 26,052 $ — $ 4,013 (a) Includes the effect of netting agreements and net cash collateral received. The offset related to the OTC derivatives was allocated to the various types of derivatives based on the net positions. (b) Offsetting of reverse repurchase agreements relates to our involvement in the Fixed Income Clearing Corporation, where we settle government securities transactions on a net basis for payment and delivery through the Fedwire system.
Offsetting Liabilities	Offsetting of derivative liabilities and financial liabilities at March 31, 2017 Net liabilities recognized on the balance sheet Gross liabilities recognized Gross amounts offset in the balance sheet Gross amounts not offset in the balance sheet (in millions) (a) Financial instruments Cash collateral pledged Net amount Derivatives subject to netting arrangements: Interest rate contracts $ 7,328 $ 6,529 $ 799 $ 666 $ — $ 133 Foreign exchange contracts 2,560 1,645 915 12 — 903 Equity and other contracts 112 54 58 57 — 1 Total derivatives subject to netting arrangements 10,000 8,228 1,772 735 — 1,037 Total derivatives not subject to netting arrangements 632 — 632 — — 632 Total derivatives 10,632 8,228 2,404 735 — 1,669 Repurchase agreements 9,777 502 (b) 9,275 9,275 — — Securities lending 1,501 — 1,501 1,417 — 84 Total $ 21,910 $ 8,730 $ 13,180 $ 11,427 $ — $ 1,753 (a) Includes the effect of netting agreements and net cash collateral paid. The offset related to the OTC derivatives was allocated to the various types of derivatives based on the net positions. (b) Offsetting of repurchase agreements relates to our involvement in the Fixed Income Clearing Corporation, where we settle government securities transactions on a net basis for payment and delivery through the Fedwire system. Offsetting of derivative liabilities and financial liabilities at Dec. 31, 2016 Net liabilities recognized on the balance sheet Gross liabilities recognized Gross amounts offset in the balance sheet Gross amounts not offset in the balance sheet (in millions) (a) Financial instruments Cash collateral pledged Net amount Derivatives subject to netting arrangements: Interest rate contracts $ 8,116 $ 6,634 $ 1,482 $ 1,266 $ — $ 216 Foreign exchange contracts 4,957 3,363 1,594 355 — 1,239 Equity and other contracts 104 50 54 54 — — Total derivatives subject to netting arrangements 13,177 10,047 3,130 1,675 — 1,455 Total derivatives not subject to netting arrangements 1,271 — 1,271 — — 1,271 Total derivatives 14,448 10,047 4,401 1,675 — 2,726 Repurchase agreements 8,703 481 (b) 8,222 8,222 — — Securities lending 1,615 — 1,615 1,522 — 93 Total $ 24,766 $ 10,528 $ 14,238 $ 11,419 $ — $ 2,819 (a) Includes the effect of netting agreements and net cash collateral paid. The offset related to the OTC derivatives was allocated to the various types of derivatives based on the net positions. (b) Offsetting of repurchase agreements relates to our involvement in the Fixed Income Clearing Corporation, where we settle government securities transactions on a net basis for payment and delivery through the Fedwire system.
Transfer of Certain Financial Assets Accounted for as Secured Borrowings	The following tables present the contract value of repurchase agreements and securities lending transactions accounted for as secured borrowings by the type of collateral provided to counterparties. Repurchase agreements and securities lending transactions accounted for as secured borrowings at March 31, 2017 Remaining contractual maturity of the agreements (in millions) Overnight and continuous Up to 30 days 30 days or more Total Repurchase agreements: U.S. Treasury $ 3,014 $ 13 $ — $ 3,027 U.S. government agencies 523 64 — 587 Agency RMBS 2,551 348 — 2,899 Corporate bonds 428 — 1,138 1,566 Other debt securities 616 — 390 1,006 Equity securities 435 — 257 692 Total $ 7,567 $ 425 $ 1,785 $ 9,777 Securities lending: U.S. government agencies $ 45 $ — $ — $ 45 Other debt securities 389 — — 389 Equity securities 1,067 — — 1,067 Total $ 1,501 $ — $ — $ 1,501 Total borrowings $ 9,068 $ 425 $ 1,785 $ 11,278 Repurchase agreements and securities lending transactions accounted for as secured borrowings at Dec. 31, 2016 Remaining contractual maturity of the agreements (in millions) Overnight and continuous Up to 30 days 30 days or more Total Repurchase agreements: U.S. Treasury $ 2,488 $ 4 $ — $ 2,492 U.S. government agencies 396 10 — 406 Agency RMBS 3,294 386 — 3,680 Corporate bonds 304 — 694 998 Other debt securities 146 — 563 709 Equity securities 375 — 43 418 Total $ 7,003 $ 400 $ 1,300 $ 8,703 Securities lending: U.S. government agencies $ 39 $ — $ — $ 39 Other debt securities 477 — — 477 Equity securities 1,099 — — 1,099 Total $ 1,615 $ — $ — $ 1,615 Total borrowings $ 8,618 $ 400 $ 1,300 $ 10,318

Lines of business (Tables)

Lines of business (Tables)	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Contribution of Segments to Overall Profitability	The following consolidating schedules show the contribution of our businesses to our overall profitability. For the quarter ended March 31, 2017 Investment Investment Other Consolidated (dollar amounts in millions) Fee and other revenue $ 877 (a) $ 2,084 $ 72 $ 3,033 (a) Net interest revenue (expense) 86 707 (1 ) 792 Total revenue 963 (a) 2,791 71 3,825 (a) Provision for credit losses 3 — (8 ) (5 ) Noninterest expense 683 1,849 107 2,639 (b) Income (loss) before taxes $ 277 (a) $ 942 $ (28 ) $ 1,191 (a)(b) Pre-tax operating margin (c) 29 % 34 % N/M 31 % Average assets $ 31,067 $ 251,027 $ 54,106 $ 336,200 (a) Both fee and other revenue and total revenue include the net income from consolidated investment management funds of $15 million representing $33 million of income and noncontrolling interests of $18 million . Income before taxes is net of noncontrolling interests of $18 million . (b) Noninterest expense includes a loss attributable to noncontrolling interest of $3 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the quarter ended Dec. 31, 2016 Investment Management Investment Services Other Consolidated (dollar amounts in millions) Fee and other revenue $ 880 (a) $ 2,032 $ 42 $ 2,954 (a) Net interest revenue 80 713 38 831 Total revenue 960 (a) 2,745 80 3,785 (a) Provision for credit losses 6 — 1 7 Noninterest expense 694 1,824 110 2,628 (b) Income (loss) before taxes $ 260 (a) $ 921 $ (31 ) $ 1,150 (a)(b) Pre-tax operating margin (c) 27 % 34 % N/M 30 % Average assets $ 30,529 $ 269,036 $ 44,577 $ 344,142 (a) Both fee and other revenue and total revenue include the net income from consolidated investment management funds of $ 1 million , representing $5 million of income and noncontrolling interests of $4 million. Income before taxes is net of noncontrolling interests of $4 million. (b) Noninterest expense includes a loss attributable to noncontrolling interest of $ 3 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the quarter ended March 31, 2016 Investment Investment Other Consolidated (dollar amounts in millions) Fee and other revenue $ 812 (a) $ 2,030 $ 129 $ 2,971 (a) Net interest revenue 83 679 4 766 Total revenue 895 (a) 2,709 133 3,737 (a) Provision for credit losses (1 ) 14 (3 ) 10 Noninterest expense 679 1,808 140 2,627 (b) Income (loss) before taxes $ 217 (a) $ 887 $ (4 ) $ 1,100 (a)(b) Pre-tax operating margin (c) 24 % 33 % N/M 29 % Average assets $ 29,971 $ 273,289 $ 61,294 $ 364,554 (a) Both fee and other revenue and total revenue include net income from consolidated investment management funds of $ 1 million , representing $6 million of losses and a loss attributable to noncontrolling interests of $7 million. Income (loss) before taxes is net of a loss attributable to noncontrolling interests of $7 million. (b) Noninterest expense includes a loss attributable to noncontrolling interest of $ 2 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful.

Supplemental information to t45

Supplemental information to the Consolidated Statement of Cash Flows (Tables)	3 Months Ended
	Mar. 31, 2017
Supplemental Cash Flow Information [Abstract]
Noncash Investing and Financing Transactions that are Not Reflected in Consolidated Statement of Cash Flows	Noncash investing and financing transactions that, appropriately, are not reflected in the Consolidated Statement of Cash Flows are listed below. Noncash investing and financing transactions Three months ended March 31, (in millions) 2017 2016 Transfers from loans to other assets for other real estate owned (“OREO”) $ 1 $ 1 Change in assets of consolidated VIEs 204 101 Change in liabilities of consolidated VIEs 106 8 Change in nonredeemable noncontrolling interests of consolidated investment management funds 84 81 Securities purchased not settled 580 86 Securities sales not settled 81 356 Premises and equipment/capitalized software funded by capital lease obligations 1 2

Accounting change and new acc46

Accounting change and new accounting guidance disclosure (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Provision for income taxes		$ 269	$ 280	$ 283
Diluted (usd per share)	[1]	$ 0.83	$ 0.77	$ 0.73
Effective tax rate		22.30%		25.90%
ASU2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Provision for income taxes		$ (32)
Diluted (usd per share)		$ 0.03
Effective tax rate		3.00%
[1]	Basic and diluted earnings per share under the two-class method are determined on the net income applicable to common shareholders of The Bank of New York Mellon Corporation reported on the income statement less earnings allocated to participating securities.

Acquisitions and dispositions (

Acquisitions and dispositions (Details) $ in Millions	Apr. 01, 2016USD ($)customer	Mar. 31, 2017USD ($)
Business Acquisition [Line Items]
Contingent payments		$ 0
Potential obligation to pay additional consideration, lower range		0
Potential obligation to pay additional consideration, upper range		$ 18
Contingent consideration payment period		2 years
Atherton Lane Acquisition
Acquisitions
Assets under management acquired	$ 2,450
Approximate number of high net worth clients (in customers) | customer	700
Cash paid for assets acquired	$ 38
Business combination, contingent payments	22
Goodwill	$ 29
Useful life	14 years
Finite-lived intangible assets acquired	$ 30

Securities - Amortized Cost, Gr

Securities - Amortized Cost, Gross Unrealized Gains and Losses and Fair Value of Securities (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Gain (Loss) on Investments [Line Items]
Amortized cost	$ 115,535	$ 114,501
Gross unrealized Gains	1,131	1,124
Gross unrealized Losses	1,020	1,134
Fair value	115,646	114,491
AOCI, transfers from AFS to HTM Securities, gross unrealized gains	59	62
AOCI, transfers from AFS to HTM Securities, gross unrealized losses	179	190
Available-for-sale
Gain (Loss) on Investments [Line Items]
Amortized cost	75,281	73,596
Gross unrealized Gains	987	997
Gross unrealized Losses	688	771
Fair value	75,580	73,822
Available-for-sale | U.S. Treasury
Gain (Loss) on Investments [Line Items]
Amortized cost	15,692	14,373
Gross unrealized Gains	133	115
Gross unrealized Losses	158	181
Fair value	15,667	14,307
Available-for-sale | U.S. government agencies
Gain (Loss) on Investments [Line Items]
Amortized cost	357	366
Gross unrealized Gains	1	2
Gross unrealized Losses	7	9
Fair value	351	359
Available-for-sale | State and political subdivisions
Gain (Loss) on Investments [Line Items]
Amortized cost	3,294	3,392
Gross unrealized Gains	54	38
Gross unrealized Losses	43	52
Fair value	3,305	3,378
Available-for-sale | Agency RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	22,912	22,929
Gross unrealized Gains	142	148
Gross unrealized Losses	320	341
Fair value	22,734	22,736
Available-for-sale | Non-agency RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	577	620
Gross unrealized Gains	30	31
Gross unrealized Losses	10	13
Fair value	597	638
Available-for-sale | Other RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	454	517
Gross unrealized Gains	4	4
Gross unrealized Losses	7	8
Fair value	451	513
Available-for-sale | Commercial MBS
Gain (Loss) on Investments [Line Items]
Amortized cost	913	931
Gross unrealized Gains	7	8
Gross unrealized Losses	9	11
Fair value	911	928
Available-for-sale | Agency commercial MBS
Gain (Loss) on Investments [Line Items]
Amortized cost	7,148	6,505
Gross unrealized Gains	36	28
Gross unrealized Losses	73	84
Fair value	7,111	6,449
Available-for-sale | CLOs
Gain (Loss) on Investments [Line Items]
Amortized cost	2,561	2,593
Gross unrealized Gains	9	6
Gross unrealized Losses	0	1
Fair value	2,570	2,598
Available-for-sale | Other asset-backed securities
Gain (Loss) on Investments [Line Items]
Amortized cost	1,454	1,729
Gross unrealized Gains	5	4
Gross unrealized Losses	3	6
Fair value	1,456	1,727
Available-for-sale | Foreign covered bonds
Gain (Loss) on Investments [Line Items]
Amortized cost	2,052	2,126
Gross unrealized Gains	22	24
Gross unrealized Losses	7	9
Fair value	2,067	2,141
Available-for-sale | Corporate bonds
Gain (Loss) on Investments [Line Items]
Amortized cost	1,361	1,391
Gross unrealized Gains	20	22
Gross unrealized Losses	15	17
Fair value	1,366	1,396
Available-for-sale | Sovereign debt/sovereign guaranteed
Gain (Loss) on Investments [Line Items]
Amortized cost	11,976	12,248
Gross unrealized Gains	218	261
Gross unrealized Losses	23	20
Fair value	12,171	12,489
Available-for-sale | Other debt securities
Gain (Loss) on Investments [Line Items]
Amortized cost	2,659	1,952
Gross unrealized Gains	18	19
Gross unrealized Losses	8	10
Fair value	2,669	1,961
Available-for-sale | Equity securities
Gain (Loss) on Investments [Line Items]
Amortized cost	2	2
Gross unrealized Gains	1	1
Gross unrealized Losses	0	0
Fair value	3	3
Available-for-sale | Money market funds
Gain (Loss) on Investments [Line Items]
Amortized cost	853	842
Gross unrealized Gains	0	0
Gross unrealized Losses	0	0
Fair value	853	842
Available-for-sale | Non-agency RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	1,016	1,080
Gross unrealized Gains	287	286
Gross unrealized Losses	5	9
Fair value	1,298	1,357
Held-to-maturity
Gain (Loss) on Investments [Line Items]
Amortized cost	40,254	40,905
Gross unrealized Gains	144	127
Gross unrealized Losses	332	363
Fair value	40,066	40,669
Held-to-maturity | U.S. Treasury
Gain (Loss) on Investments [Line Items]
Amortized cost	10,596	11,117
Gross unrealized Gains	20	22
Gross unrealized Losses	37	41
Fair value	10,579	11,098
Held-to-maturity | U.S. government agencies
Gain (Loss) on Investments [Line Items]
Amortized cost	1,614	1,589
Gross unrealized Gains	0	0
Gross unrealized Losses	6	6
Fair value	1,608	1,583
Held-to-maturity | State and political subdivisions
Gain (Loss) on Investments [Line Items]
Amortized cost	18	19
Gross unrealized Gains	0	0
Gross unrealized Losses	1	1
Fair value	17	18
Held-to-maturity | Agency RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	25,132	25,221
Gross unrealized Gains	85	57
Gross unrealized Losses	271	299
Fair value	24,946	24,979
Held-to-maturity | Non-agency RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	71	78
Gross unrealized Gains	4	4
Gross unrealized Losses	2	2
Fair value	73	80
Held-to-maturity | Other RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	136	142
Gross unrealized Gains	0	0
Gross unrealized Losses	4	4
Fair value	132	138
Held-to-maturity | Commercial MBS
Gain (Loss) on Investments [Line Items]
Amortized cost	7	7
Gross unrealized Gains	0	0
Gross unrealized Losses	0	0
Fair value	7	7
Held-to-maturity | Agency commercial MBS
Gain (Loss) on Investments [Line Items]
Amortized cost	829	721
Gross unrealized Gains	2	1
Gross unrealized Losses	10	10
Fair value	821	712
Held-to-maturity | Foreign covered bonds
Gain (Loss) on Investments [Line Items]
Amortized cost	75	74
Gross unrealized Gains	2	1
Gross unrealized Losses	0	0
Fair value	77	75
Held-to-maturity | Sovereign debt/sovereign guaranteed
Gain (Loss) on Investments [Line Items]
Amortized cost	1,750	1,911
Gross unrealized Gains	31	42
Gross unrealized Losses	1	0
Fair value	1,780	1,953
Held-to-maturity | Other debt securities
Gain (Loss) on Investments [Line Items]
Amortized cost	26	26
Gross unrealized Gains	0	0
Gross unrealized Losses	0	0
Fair value	$ 26	$ 26

Securities - Net Securities Gai

Securities - Net Securities Gains (Losses) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Securities [Abstract]
Realized gross gains	$ 11	$ 15	$ 22
Realized gross losses	0	(3)	0
Recognized gross impairments	(1)	(2)	(2)
Net securities gains	$ 10	$ 10	$ 20

Securities - Aggregate Fair Val

Securities - Aggregate Fair Value of Investments with Continuous Unrealized Loss Position (Detail) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	$ 60,291,000,000	$ 60,585,000,000
Less than 12 months Unrealized losses	769,000,000	860,000,000
12 months or more Fair value	3,811,000,000	4,229,000,000
12 months or more Unrealized losses	251,000,000	274,000,000
Total Fair value	64,102,000,000	64,814,000,000
Total Unrealized losses	1,020,000,000	1,134,000,000
AOCI, transfers from AFS to HTM Securities, gross unrealized losses, greater than 12 months	179,000,000	190,000,000
AOCI, transfers from AFS to HTM Securities, gross unrealized losses, less than 12 months	0	0
Securities available-for-sale
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	30,481,000,000	32,802,000,000
Less than 12 months Unrealized losses	447,000,000	506,000,000
12 months or more Fair value	3,475,000,000	3,952,000,000
12 months or more Unrealized losses	241,000,000	265,000,000
Total Fair value	33,956,000,000	36,754,000,000
Total Unrealized losses	688,000,000	771,000,000
Securities available-for-sale | U.S. Treasury
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	9,290,000,000	8,489,000,000
Less than 12 months Unrealized losses	158,000,000	181,000,000
12 months or more Fair value	0	0
12 months or more Unrealized losses	0	0
Total Fair value	9,290,000,000	8,489,000,000
Total Unrealized losses	158,000,000	181,000,000
Securities available-for-sale | U.S. government agencies
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	300,000,000	257,000,000
Less than 12 months Unrealized losses	7,000,000	9,000,000
12 months or more Fair value	0	0
12 months or more Unrealized losses	0	0
Total Fair value	300,000,000	257,000,000
Total Unrealized losses	7,000,000	9,000,000
Securities available-for-sale | State and political subdivisions
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	593,000,000	1,058,000,000
Less than 12 months Unrealized losses	24,000,000	33,000,000
12 months or more Fair value	129,000,000	131,000,000
12 months or more Unrealized losses	19,000,000	19,000,000
Total Fair value	722,000,000	1,189,000,000
Total Unrealized losses	43,000,000	52,000,000
Securities available-for-sale | Agency RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	13,412,000,000	14,766,000,000
Less than 12 months Unrealized losses	132,000,000	141,000,000
12 months or more Fair value	1,771,000,000	1,673,000,000
12 months or more Unrealized losses	188,000,000	200,000,000
Total Fair value	15,183,000,000	16,439,000,000
Total Unrealized losses	320,000,000	341,000,000
Securities available-for-sale | Non-agency RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	27,000,000	21,000,000
Less than 12 months Unrealized losses	0	0
12 months or more Fair value	319,000,000	332,000,000
12 months or more Unrealized losses	10,000,000	13,000,000
Total Fair value	346,000,000	353,000,000
Total Unrealized losses	10,000,000	13,000,000
Securities available-for-sale | Other RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	7,000,000	26,000,000
Less than 12 months Unrealized losses	0	0
12 months or more Fair value	148,000,000	136,000,000
12 months or more Unrealized losses	7,000,000	8,000,000
Total Fair value	155,000,000	162,000,000
Total Unrealized losses	7,000,000	8,000,000
Securities available-for-sale | Commercial MBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	360,000,000	302,000,000
Less than 12 months Unrealized losses	7,000,000	7,000,000
12 months or more Fair value	149,000,000	163,000,000
12 months or more Unrealized losses	2,000,000	4,000,000
Total Fair value	509,000,000	465,000,000
Total Unrealized losses	9,000,000	11,000,000
Securities available-for-sale | Agency commercial MBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	2,542,000,000	3,570,000,000
Less than 12 months Unrealized losses	65,000,000	78,000,000
12 months or more Fair value	651,000,000	589,000,000
12 months or more Unrealized losses	8,000,000	6,000,000
Total Fair value	3,193,000,000	4,159,000,000
Total Unrealized losses	73,000,000	84,000,000
Securities available-for-sale | CLOs
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value		443,000,000
Less than 12 months Unrealized losses		1,000,000
12 months or more Fair value		404,000,000
12 months or more Unrealized losses		0
Total Fair value		847,000,000
Total Unrealized losses	0	1,000,000
Securities available-for-sale | Other asset-backed securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	243,000,000	276,000,000
Less than 12 months Unrealized losses	0	1,000,000
12 months or more Fair value	182,000,000	357,000,000
12 months or more Unrealized losses	3,000,000	5,000,000
Total Fair value	425,000,000	633,000,000
Total Unrealized losses	3,000,000	6,000,000
Securities available-for-sale | Corporate bonds
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	562,000,000	594,000,000
Less than 12 months Unrealized losses	15,000,000	16,000,000
12 months or more Fair value	8,000,000	7,000,000
12 months or more Unrealized losses	0	1,000,000
Total Fair value	570,000,000	601,000,000
Total Unrealized losses	15,000,000	17,000,000
Securities available-for-sale | Sovereign debt/sovereign guaranteed
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	1,488,000,000	1,521,000,000
Less than 12 months Unrealized losses	23,000,000	20,000,000
12 months or more Fair value	57,000,000	63,000,000
12 months or more Unrealized losses	0	0
Total Fair value	1,545,000,000	1,584,000,000
Total Unrealized losses	23,000,000	20,000,000
Securities available-for-sale | Non-agency RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	31,000,000	25,000,000
Less than 12 months Unrealized losses	1,000,000	0
12 months or more Fair value	36,000,000	47,000,000
12 months or more Unrealized losses	4,000,000	9,000,000
Total Fair value	67,000,000	72,000,000
Total Unrealized losses	5,000,000	9,000,000
Securities available-for-sale | Other debt securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	853,000,000	742,000,000
Less than 12 months Unrealized losses	8,000,000	10,000,000
12 months or more Fair value	25,000,000	50,000,000
12 months or more Unrealized losses	0	0
Total Fair value	878,000,000	792,000,000
Total Unrealized losses	8,000,000	10,000,000
Securities available-for-sale | Foreign covered bonds
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	773,000,000	712,000,000
Less than 12 months Unrealized losses	7,000,000	9,000,000
12 months or more Fair value	0	0
12 months or more Unrealized losses	0	0
Total Fair value	773,000,000	712,000,000
Total Unrealized losses	7,000,000	9,000,000
Held-to-maturity
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	29,810,000,000	27,783,000,000
Less than 12 months Unrealized losses	322,000,000	354,000,000
12 months or more Fair value	336,000,000	277,000,000
12 months or more Unrealized losses	10,000,000	9,000,000
Total Fair value	30,146,000,000	28,060,000,000
Total Unrealized losses	332,000,000	363,000,000
Held-to-maturity | U.S. Treasury
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	8,166,000,000	6,112,000,000
Less than 12 months Unrealized losses	37,000,000	41,000,000
12 months or more Fair value	0	0
12 months or more Unrealized losses	0	0
Total Fair value	8,166,000,000	6,112,000,000
Total Unrealized losses	37,000,000	41,000,000
Held-to-maturity | U.S. government agencies
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	1,558,000,000	1,533,000,000
Less than 12 months Unrealized losses	6,000,000	6,000,000
12 months or more Fair value	0	0
12 months or more Unrealized losses	0	0
Total Fair value	1,558,000,000	1,533,000,000
Total Unrealized losses	6,000,000	6,000,000
Held-to-maturity | State and political subdivisions
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	0	0
Less than 12 months Unrealized losses	0	0
12 months or more Fair value	4,000,000	4,000,000
12 months or more Unrealized losses	1,000,000	1,000,000
Total Fair value	4,000,000	4,000,000
Total Unrealized losses	1,000,000	1,000,000
Held-to-maturity | Agency RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	19,369,000,000	19,498,000,000
Less than 12 months Unrealized losses	268,000,000	297,000,000
12 months or more Fair value	177,000,000	102,000,000
12 months or more Unrealized losses	3,000,000	2,000,000
Total Fair value	19,546,000,000	19,600,000,000
Total Unrealized losses	271,000,000	299,000,000
Held-to-maturity | Non-agency RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	3,000,000	4,000,000
Less than 12 months Unrealized losses	0	0
12 months or more Fair value	45,000,000	48,000,000
12 months or more Unrealized losses	2,000,000	2,000,000
Total Fair value	48,000,000	52,000,000
Total Unrealized losses	2,000,000	2,000,000
Held-to-maturity | Other RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	0	15,000,000
Less than 12 months Unrealized losses	0	0
12 months or more Fair value	110,000,000	123,000,000
12 months or more Unrealized losses	4,000,000	4,000,000
Total Fair value	110,000,000	138,000,000
Total Unrealized losses	4,000,000	4,000,000
Held-to-maturity | Commercial MBS
Investments, Unrealized Loss Position [Line Items]
Total Unrealized losses	0	0
Held-to-maturity | Agency commercial MBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	558,000,000	621,000,000
Less than 12 months Unrealized losses	10,000,000	10,000,000
12 months or more Fair value	0	0
12 months or more Unrealized losses	0	0
Total Fair value	558,000,000	621,000,000
Total Unrealized losses	10,000,000	10,000,000
Held-to-maturity | Sovereign debt/sovereign guaranteed
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	156,000,000
Less than 12 months Unrealized losses	1,000,000
12 months or more Fair value	0
12 months or more Unrealized losses	0
Total Fair value	156,000,000
Total Unrealized losses	1,000,000	0
Held-to-maturity | Other debt securities
Investments, Unrealized Loss Position [Line Items]
Total Unrealized losses	0	0
Held-to-maturity | Foreign covered bonds
Investments, Unrealized Loss Position [Line Items]
Total Unrealized losses	$ 0	$ 0

Securities - Maturity Distribut

Securities - Maturity Distribution by Carrying Amount and Yield (on Tax Equivalent Basis) of Investment Securities Portfolio (Detail) $ in Millions	Mar. 31, 2017USD ($)
Securities available-for-sale:
One year or less	$ 6,790
Over 1 through 5 years	19,251
Over 5 through 10 years	7,801
Over 10 years	3,754
Total	75,580
Securities held-to-maturity:
One year or less	4,912
Over 1 through 5 years	6,934
Over 5 through 10 years	2,219
Over 10 years	14
Total	40,254
Mortgage-backed securities
Securities available-for-sale:
Without single maturity date	33,102
Securities held-to-maturity:
Mortgage-backed securities	26,175
Asset-backed securities
Securities available-for-sale:
Without single maturity date	4,026
Equity securities
Securities available-for-sale:
Without single maturity date	856
U.S. Treasury
Securities available-for-sale:
One year or less	2,934
Over 1 through 5 years	5,057
Over 5 through 10 years	4,302
Over 10 years	3,374
Total	$ 15,667
Securities available-for-sale (Yield):
One year or less	0.98%
Over 1 through 5 years	1.51%
Over 5 through 10 years	1.88%
Over 10 years	3.11%
Total	1.86%
Securities held-to-maturity:
One year or less	$ 3,999
Over 1 through 5 years	5,092
Over 5 through 10 years	1,505
Over 10 years	0
Total	$ 10,596
Securities held-to-maturity (Yield):
One year or less	0.89%
Over 1 through 5 years	1.47%
Over 5 through 10 years	1.94%
Over 10 years	0.00%
Total	1.32%
U.S. government agencies
Securities available-for-sale:
One year or less	$ 0
Over 1 through 5 years	114
Over 5 through 10 years	237
Over 10 years	0
Total	$ 351
Securities available-for-sale (Yield):
One year or less	0.00%
Over 1 through 5 years	1.30%
Over 5 through 10 years	2.35%
Over 10 years	0.00%
Total	2.01%
Securities held-to-maturity:
One year or less	$ 475
Over 1 through 5 years	1,089
Over 5 through 10 years	50
Over 10 years	0
Total	$ 1,614
Securities held-to-maturity (Yield):
One year or less	0.91%
Over 1 through 5 years	1.23%
Over 5 through 10 years	2.02%
Over 10 years	0.00%
Total	1.16%
State and political subdivisions
Securities available-for-sale:
One year or less	$ 276
Over 1 through 5 years	1,732
Over 5 through 10 years	1,085
Over 10 years	212
Total	$ 3,305
Securities available-for-sale (Yield):
One year or less	2.55%
Over 1 through 5 years	2.98%
Over 5 through 10 years	3.52%
Over 10 years	2.04%
Total	3.06%
Securities held-to-maturity:
One year or less	$ 0
Over 1 through 5 years	1
Over 5 through 10 years	3
Over 10 years	14
Total	$ 18
Securities held-to-maturity (Yield):
One year or less	0.00%
Over 1 through 5 years	7.06%
Over 5 through 10 years	6.71%
Over 10 years	5.34%
Total	5.69%
Other bonds, notes and debentures
Securities available-for-sale:
One year or less	$ 3,580
Over 1 through 5 years	12,348
Over 5 through 10 years	2,177
Over 10 years	168
Total	$ 18,273
Securities available-for-sale (Yield):
One year or less	0.94%
Over 1 through 5 years	1.02%
Over 5 through 10 years	1.09%
Over 10 years	1.67%
Total	1.02%
Securities held-to-maturity:
One year or less	$ 438
Over 1 through 5 years	752
Over 5 through 10 years	661
Over 10 years	0
Total	$ 1,851
Securities held-to-maturity (Yield):
One year or less	0.62%
Over 1 through 5 years	0.62%
Over 5 through 10 years	0.71%
Over 10 years	0.00%
Total	0.65%
Mortgage/ asset-backed and equity securities
Securities available-for-sale:
Total	$ 37,984
Securities available-for-sale (Yield):
Total	2.62%
Securities held-to-maturity:
Total	$ 26,175
Securities held-to-maturity (Yield):
Total	2.75%
Mortgage/ asset-backed and equity securities | Mortgage-backed securities
Securities available-for-sale:
Without single maturity date	$ 33,102
Securities available-for-sale (Yield):
Without single maturity date	2.75%
Securities held-to-maturity:
Mortgage-backed securities	$ 26,175
Securities held-to-maturity (Yield):
Without single maturity date	2.75%
Mortgage/ asset-backed and equity securities | Asset-backed securities
Securities available-for-sale:
Without single maturity date	$ 4,026
Securities available-for-sale (Yield):
Without single maturity date	2.10%
Mortgage/ asset-backed and equity securities | Equity securities
Securities available-for-sale:
Without single maturity date	$ 856
Securities available-for-sale (Yield):
Without single maturity date	0.00%

Securities - Projected Weighted

Securities - Projected Weighted-Average Default Rates and Loss Severities (Detail) - Recent Vintage	Mar. 31, 2017	Dec. 31, 2016
Alt-A
Gain (Loss) on Investments [Line Items]
Default rate	30.00%	30.00%
Severity	54.00%	54.00%
Subprime
Gain (Loss) on Investments [Line Items]
Default rate	49.00%	49.00%
Severity	67.00%	70.00%
Prime
Gain (Loss) on Investments [Line Items]
Default rate	18.00%	18.00%
Severity	39.00%	39.00%

Securities - Pre-Tax Net Securi

Securities - Pre-Tax Net Securities Gains (Losses) by Type (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net securities gains	$ 10	$ 10	$ 20
Agency RMBS
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net securities gains	1	0	8
Non-agency RMBS
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net securities gains	(1)	7	(2)
Other
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net securities gains	$ 10	$ 3	$ 14

Securities - Debt Securities Cr

Securities - Debt Securities Credit Losses Roll Forward Recorded in Earnings (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other than Temporary Impairment [Roll Forward]
Beginning balance	$ 88	$ 91
Add: Initial OTTI credit losses	0	0
Subsequent OTTI credit losses	1	2
Less: Realized losses for securities sold	0	0
Ending balance	$ 89	$ 93

Securities - Pledged assets (De

Securities - Pledged assets (Details) - USD ($) $ in Billions	Mar. 31, 2017	Dec. 31, 2016
Securities [Abstract]
Pledged assets	$ 100	$ 102
Pledged collateral for potential borrowings at the Federal Reserve Discount Window	84	84
Pledged securities	85	87
Pledged loans	8	8
Pledged interest-bearing deposits	5	4
Pledged trading assets	2	3
Pledged assets permitted to be sold or repledged	5	6
Market value of securities that can be sold or repledged	50	50
Market value of securities received as collateral that have been sold or repledged	23	20
Cash segregated under federal or other regulations	3	3
Securities segregated under federal or other regulations	$ 2	$ 2

Loans and asset quality - Detai

Loans and asset quality - Details of Loan Distribution and Industry Concentrations of Credit Risk (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 60,868	$ 64,458
Unearned income on lease financings	511	527
Financial institutions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	13,341	14,689
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,890	2,617
Wealth management loans and mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,023	15,654
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,717	4,654
Other residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	817	854
Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,200	5,500
Margin loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,100	17,600
Total Domestic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	48,073	50,425
Total Domestic | Financial institutions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,387	6,342
Total Domestic | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,543	2,286
Total Domestic | Wealth management loans and mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,909	15,555
Total Domestic | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,698	4,639
Total Domestic | Lease financings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	846	989
Total Domestic | Other residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	817	854
Total Domestic | Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	673	1,055	$ 917
Total Domestic | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,119	1,202	1,106
Total Domestic | Margin loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,081	17,503	$ 18,674
Foreign
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	12,795	14,033
Foreign | Financial institutions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,954	8,347
Foreign | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	347	331
Foreign | Wealth management loans and mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	114	99
Foreign | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	19	15
Foreign | Lease financings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	739	736
Foreign | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,554	4,418
Foreign | Margin loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 68	$ 87

Loans and asset quality - Allow

Loans and asset quality - Allowance for Credit Losses Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 281	$ 274	$ 275
Charge-offs	(1)	(1)	0
Recoveries	1	1	2
Net recoveries	0	0	2
Provision	(5)	7	10
Ending balance	276	281	287
Allowance for:
Loan losses	164	169	162
Lending-related commitments	112	112	125
Individually evaluated for impairment:
Loan balance	5	9	186
Allowance for loan losses	3	5	4
Collectively evaluated for impairment:
Loan balance	60,863	64,449	61,053
Allowance for loan losses	161	164	158
Loans	60,868	64,458
Total Domestic
Collectively evaluated for impairment:
Loans	48,073	50,425
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	82	91	82
Charge-offs	0	0	0
Recoveries	0	0	0
Net recoveries	0	0	0
Provision	0	(9)	6
Ending balance	82	82	88
Allowance for:
Loan losses	24	25	25
Lending-related commitments	58	57	63
Individually evaluated for impairment:
Loan balance	0	0	0
Allowance for loan losses	0	0	0
Collectively evaluated for impairment:
Loan balance	2,543	2,286	2,130
Allowance for loan losses	24	25	25
Loans	2,890	2,617
Commercial | Total Domestic
Collectively evaluated for impairment:
Loans	2,543	2,286
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	73	63	59
Charge-offs	0	0	0
Recoveries	0	0	0
Net recoveries	0	0	0
Provision	0	10	3
Ending balance	73	73	62
Allowance for:
Loan losses	54	52	40
Lending-related commitments	19	21	22
Individually evaluated for impairment:
Loan balance	0	0	2
Allowance for loan losses	0	0	1
Collectively evaluated for impairment:
Loan balance	4,698	4,639	3,927
Allowance for loan losses	54	52	39
Loans	4,717	4,654
Commercial real estate | Total Domestic
Collectively evaluated for impairment:
Loans	4,698	4,639
Financial institutions
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	26	29	31
Charge-offs	0	0	0
Recoveries	0	0	0
Net recoveries	0	0	0
Provision	(3)	(3)	1
Ending balance	23	26	32
Allowance for:
Loan losses	5	8	11
Lending-related commitments	18	18	21
Individually evaluated for impairment:
Loan balance	0	0	171
Allowance for loan losses	0	0	0
Collectively evaluated for impairment:
Loan balance	5,387	6,342	5,415
Allowance for loan losses	5	8	11
Loans	13,341	14,689
Financial institutions | Total Domestic
Collectively evaluated for impairment:
Loans	5,387	6,342
Lease financings
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	13	14	15
Charge-offs	0	0	0
Recoveries	0	0	0
Net recoveries	0	0	0
Provision	(3)	(1)	1
Ending balance	10	13	16
Allowance for:
Loan losses	10	13	16
Lending-related commitments	0	0	0
Individually evaluated for impairment:
Loan balance	0	4	5
Allowance for loan losses	0	2	2
Collectively evaluated for impairment:
Loan balance	846	985	973
Allowance for loan losses	10	11	14
Lease financings | Total Domestic
Collectively evaluated for impairment:
Loans	846	989
Wealth management loans and mortgages
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	23	18	19
Charge-offs	0	0	0
Recoveries	0	0	0
Net recoveries	0	0	0
Provision	3	5	(1)
Ending balance	26	23	18
Allowance for:
Loan losses	22	19	15
Lending-related commitments	4	4	3
Individually evaluated for impairment:
Loan balance	5	5	8
Allowance for loan losses	3	3	1
Collectively evaluated for impairment:
Loan balance	15,904	15,550	13,874
Allowance for loan losses	19	16	14
Loans	16,023	15,654
Wealth management loans and mortgages | Total Domestic
Collectively evaluated for impairment:
Loans	15,909	15,555
Other residential mortgages
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	28	28	34
Charge-offs	(1)	(1)	0
Recoveries	1	1	2
Net recoveries	0	0	2
Provision	(3)	0	(4)
Ending balance	25	28	32
Allowance for:
Loan losses	25	28	32
Lending-related commitments	0	0	0
Individually evaluated for impairment:
Loan balance	0	0	0
Allowance for loan losses	0	0	0
Collectively evaluated for impairment:
Loan balance	817	854	993
Allowance for loan losses	25	28	32
Loans	817	854
Other residential mortgages | Total Domestic
Collectively evaluated for impairment:
Loans	817	854
All Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	0	0	0
Charge-offs	0	0	0
Recoveries	0	0	0
Net recoveries	0	0	0
Provision	0	0	0
Ending balance	0	0	0
Allowance for:
Loan losses	0	0	0
Lending-related commitments	0	0	0
Individually evaluated for impairment:
Loan balance	0	0	0
Allowance for loan losses	0	0	0
Collectively evaluated for impairment:
Loan balance	17,873	19,760	20,697
Allowance for loan losses	0	0	0
Foreign
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	36	31	35
Charge-offs	0	0	0
Recoveries	0	0	0
Net recoveries	0	0	0
Provision	1	5	4
Ending balance	37	36	39
Allowance for:
Loan losses	24	24	23
Lending-related commitments	13	12	16
Individually evaluated for impairment:
Loan balance	0	0	0
Allowance for loan losses	0	0	0
Collectively evaluated for impairment:
Loan balance	12,795	14,033	13,044
Allowance for loan losses	24	24	23
Overdrafts
Collectively evaluated for impairment:
Loans	4,200	5,500
Overdrafts | Total Domestic
Collectively evaluated for impairment:
Loans	673	1,055	917
Margin loans
Collectively evaluated for impairment:
Loans	16,100	17,600
Margin loans | Total Domestic
Collectively evaluated for impairment:
Loans	16,081	17,503	18,674
Other | Total Domestic
Collectively evaluated for impairment:
Loans	$ 1,119	$ 1,202	$ 1,106

Loans and asset quality - Nonpe

Loans and asset quality - Nonperforming Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Total nonperforming loans	$ 98	$ 103
Other assets owned	9	4
Total nonperforming assets	107	107
Total Domestic | Other residential mortgages
Financing Receivable, Impaired [Line Items]
Total nonperforming loans	88	91
Total Domestic | Wealth management loans and mortgages
Financing Receivable, Impaired [Line Items]
Total nonperforming loans	10	8
Total Domestic | Lease financings
Financing Receivable, Impaired [Line Items]
Total nonperforming loans	$ 0	$ 4

Loans and asset quality - Lost

Loans and asset quality - Lost Interest (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Loans and Leases Receivable Disclosure [Line Items]
Amount by which interest income recognized on nonperforming loans exceeded reversals	$ 0	$ 0	$ 0
Amount by which interest income would have increased if nonperforming loans at period end had been performing for the entire period	$ 1	$ 1	$ 1

Loans and asset quality - Infor

Loans and asset quality - Information about Impaired Loans (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance, average recorded investment	$ 5	$ 6	$ 9
Impaired loans without an allowance, average recorded investment	2	3	174
Total impaired loans, average recorded investment	7	9	183
Impaired loans with an allowance, interest income recognized	0	0	0
Impaired loans without an allowance, interest income recognized	0	0	0
Total impaired loans, interest income recognized	0	0	0
Impaired loans with an allowance, recorded investment	3	7
Impaired loans without an allowance, recorded investment	2	2
Total impaired loans, recorded investment	5	9
Impaired loans with an allowance, unpaid Principal balance	6	10
Impaired loans without an allowance, unpaid Principal balance	2	2
Total impaired loans, unpaid Principal balance	8	12
Impaired loans with an allowance, related allowance	3	5
Commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance, average recorded investment	0	0	1
Impaired loans without an allowance, average recorded investment	0	0	1
Impaired loans with an allowance, interest income recognized	0	0	0
Impaired loans without an allowance, interest income recognized	0	0	0
Impaired loans with an allowance, recorded investment	0	0
Impaired loans with an allowance, unpaid Principal balance	3	3
Impaired loans with an allowance, related allowance	0	0
Financial institutions
Financing Receivable, Impaired [Line Items]
Impaired loans without an allowance, average recorded investment	0	0	171
Impaired loans without an allowance, interest income recognized	0	0	0
Wealth management loans and mortgages
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance, average recorded investment	3	2	6
Impaired loans without an allowance, average recorded investment	2	3	2
Impaired loans with an allowance, interest income recognized	0	0	0
Impaired loans without an allowance, interest income recognized	0	0	0
Impaired loans with an allowance, recorded investment	3	3
Impaired loans without an allowance, recorded investment	2	2
Impaired loans with an allowance, unpaid Principal balance	3	3
Impaired loans without an allowance, unpaid Principal balance	2	2
Impaired loans with an allowance, related allowance	3	3
Lease financings
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance, average recorded investment	2	4	2
Impaired loans with an allowance, interest income recognized	0	0	$ 0
Impaired loans with an allowance, recorded investment	0	4
Impaired loans with an allowance, unpaid Principal balance	0	4
Impaired loans with an allowance, related allowance	0	2
Loans Individually Less Than 1 Million
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance, recorded investment	1	1
Impaired loans with an allowance, related allowance	1	1
Loans Individually Less Than 1 Million | Maximum
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance, recorded investment	$ 1	$ 1

Loans and asset quality - Inf61

Loans and asset quality - Information about Past Due Loans (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 68	$ 162
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	59	120
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	5	35
Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4	7
Commercial real estate | Total Domestic
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	21	78
Commercial real estate | Total Domestic | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	21	78
Commercial real estate | Total Domestic | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Commercial real estate | Total Domestic | Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financial institutions | Total Domestic
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	28
Financial institutions | Total Domestic | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	1
Financial institutions | Total Domestic | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	27
Financial institutions | Total Domestic | Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Wealth management loans and mortgages | Total Domestic
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	28	23
Wealth management loans and mortgages | Total Domestic | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	25	21
Wealth management loans and mortgages | Total Domestic | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3	2
Wealth management loans and mortgages | Total Domestic | Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Other residential mortgages | Total Domestic
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	19	33
Other residential mortgages | Total Domestic | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	13	20
Other residential mortgages | Total Domestic | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2	6
Other residential mortgages | Total Domestic | Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 4	$ 7

Loans and asset quality- Troubl

Loans and asset quality- Troubled Debt Restructurings (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2017USD ($)Contract	Dec. 31, 2016USD ($)Contract	Mar. 31, 2016USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of contracts | Contract	7	17	15
Outstanding recorded investment Pre-modification	$ 6	$ 3	$ 3
Outstanding recorded investment Post- modification	$ 6	$ 4	$ 3
Other residential mortgages
Financing Receivable, Modifications [Line Items]
Subsequently defaulted number of contracts | Contract	7
Wealth management loans and mortgages
Financing Receivable, Modifications [Line Items]
Subsequently defaulted number of contracts | Contract	1
Total Domestic | Other residential mortgages
Financing Receivable, Modifications [Line Items]
Number of contracts | Contract	6	17	13
Outstanding recorded investment Pre-modification	$ 2	$ 3	$ 3
Outstanding recorded investment Post- modification	$ 2	$ 4	$ 3
Total Domestic | Wealth management loans and mortgages
Financing Receivable, Modifications [Line Items]
Number of contracts | Contract	1	0	2
Outstanding recorded investment Pre-modification	$ 4	$ 0	$ 0
Outstanding recorded investment Post- modification	$ 4	$ 0	$ 0

Loans and asset quality - Credi

Loans and asset quality - Credit Quality Indicators - Wealth Management Loans and Mortgages - Credit Risk Profile by Internally Assigned Grade (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 60,868	$ 64,458
Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	2,890	2,617
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	4,717	4,654
Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Loans	13,341	14,689
Wealth management mortgages
Financing Receivable, Recorded Investment [Line Items]
Loans	8,568	8,267
Wealth management loans and mortgages
Financing Receivable, Recorded Investment [Line Items]
Loans	16,023	15,654
Investment grade | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	2,697	2,397
Investment grade | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	3,903	3,823
Investment grade | Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Loans	10,255	11,459
Investment grade | Wealth management loans
Financing Receivable, Recorded Investment [Line Items]
Loans	7,300	7,127
Non-investment grade | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	193	220
Non-investment grade | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	814	831
Non-investment grade | Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Loans	3,086	3,230
Non-investment grade | Wealth management loans
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 155	$ 260

Loans and asset quality - Addit

Loans and asset quality - Additional Information (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017USD ($)Contract	Dec. 31, 2016USD ($)class_of_receivableSegment	Mar. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of portfolio segments | Segment		3
Number of classes of financing receivables | class_of_receivable		6
Total nonperforming loans	$ 98	$ 103
Loans	60,868	64,458
Financial institutions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 13,341	14,689
Other residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Subsequently defaulted number of contracts | Contract	7
Financing receivable, modifications, subsequent default, recorded investment (less than)	$ 2
Loans	$ 817	854
Wealth management mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan to value ratio at origination	61.00%
Percentage of past due mortgages (less than)	1.00%
Loans	$ 8,568	8,267
Wealth management mortgages | California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentrations	24.00%
Wealth management mortgages | New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentrations	19.00%
Wealth management mortgages | Massachusetts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentrations	12.00%
Wealth management mortgages | Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentrations	7.00%
Wealth management mortgages | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentrations	38.00%
Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 4,200	$ 5,500
Number of business days in which overdrafts are generally repaid		2 days
Margin loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,100	$ 17,600
Total Domestic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	48,073	50,425
Total Domestic | Financial institutions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,387	6,342
Total Domestic | Other residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonperforming loans	88	91
Loans	817	854
Purchased mortgages	$ 208
Purchased residential mortgages, loan to value ratio	76.00%
Percentage of purchased residential mortgages that were at least 60 days delinquent	14.00%
Total Domestic | Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 673	1,055	$ 917
Total Domestic | Margin loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 16,081	$ 17,503	$ 18,674
Total Domestic | Margin loans | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Required daily collateral margin (in excess of)	100.00%

Goodwill and intangible asset65

Goodwill and intangible assets - Goodwill by Business Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill [Roll Forward]
Beginning balance	$ 17,316	$ 17,618
Foreign currency translation	39	(14)
Ending balance	17,355	17,604
Investment Management
Goodwill [Roll Forward]
Beginning balance	9,000	9,207
Foreign currency translation	21	(32)
Ending balance	9,021	9,175
Investment Services
Goodwill [Roll Forward]
Beginning balance	8,269	8,366
Foreign currency translation	18	18
Ending balance	8,287	8,384
Other
Goodwill [Roll Forward]
Beginning balance	47	45
Foreign currency translation	0	0
Ending balance	$ 47	$ 45

Goodwill and intangible asset66

Goodwill and intangible assets - Intangible Assets by Business Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Intangible Assets [Roll Forward]
Beginning Balance	$ 3,598		$ 3,842
Amortization	(52)	$ (60)	(57)
Foreign currency translation	3		(4)
Ending Balance	3,549	3,598	3,781
Investment Management
Intangible Assets [Roll Forward]
Beginning Balance	1,717		1,807
Amortization	(15)		(19)
Foreign currency translation	3		(6)
Ending Balance	1,705	1,717	1,782
Investment Services
Intangible Assets [Roll Forward]
Beginning Balance	1,032		1,186
Amortization	(37)		(38)
Foreign currency translation	0		2
Ending Balance	995	1,032	1,150
Other
Intangible Assets [Roll Forward]
Beginning Balance	849		849
Amortization	0		0
Foreign currency translation	0		0
Ending Balance	$ 849	$ 849	$ 849

Goodwill and intangible asset67

Goodwill and intangible assets - Intangible Assets by Type (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 6,366	$ 6,357
Accumulated amortization	(2,817)	(2,759)
Net carrying amount	3,549	3,598	$ 3,781	$ 3,842
Finite-lived Intangible Assets
Intangible Assets by Major Class [Line Items]
Gross carrying amount	3,733	3,725
Accumulated amortization	(2,817)	(2,759)
Net carrying amount	$ 916	966
Finite-lived Intangible Assets | Weighted Average
Intangible Assets by Major Class [Line Items]
Remaining weighted- average amortization period	10 years
Indefinite-lived Intangible Assets
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 2,633	2,632
Net carrying amount	2,633	2,632
Indefinite-lived Intangible Assets | Trade name
Intangible Assets by Major Class [Line Items]
Gross carrying amount	1,348	1,348
Net carrying amount	1,348	1,348
Indefinite-lived Intangible Assets | Customer relationships
Intangible Assets by Major Class [Line Items]
Gross carrying amount	1,285	1,284
Net carrying amount	1,285	1,284
Customer relationships | Finite-lived Intangible Assets
Intangible Assets by Major Class [Line Items]
Gross carrying amount	1,444	1,439
Accumulated amortization	(1,154)	(1,136)
Net carrying amount	$ 290	303
Customer relationships | Finite-lived Intangible Assets | Weighted Average
Intangible Assets by Major Class [Line Items]
Remaining weighted- average amortization period	11 years
Customer contracts—Investment Services | Finite-lived Intangible Assets
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 2,251	2,249
Accumulated amortization	(1,629)	(1,590)
Net carrying amount	$ 622	659
Customer contracts—Investment Services | Finite-lived Intangible Assets | Weighted Average
Intangible Assets by Major Class [Line Items]
Remaining weighted- average amortization period	10 years
Other | Finite-lived Intangible Assets
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 38	37
Accumulated amortization	(34)	(33)
Net carrying amount	$ 4	$ 4
Other | Finite-lived Intangible Assets | Weighted Average
Intangible Assets by Major Class [Line Items]
Remaining weighted- average amortization period	2 years

Goodwill and intangible asset68

Goodwill and intangible assets - Estimated Annual Amortization Expense (Detail) $ in Millions	Mar. 31, 2017USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,017	$ 208
2,018	178
2,019	108
2,020	98
2,021	$ 75

Other assets (Detail)

Other assets (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Other Assets [Abstract]
Corporate/bank-owned life insurance	$ 4,806	$ 4,789
Accounts receivable	4,684	4,060
Fails to deliver	2,260	1,732
Software	1,458	1,451
Renewable energy investments	1,266	1,282
Income taxes receivable	1,214	1,172
Equity in a joint venture and other investments	1,067	1,063
Tax advantaged low income housing investments	900	914
Prepaid pension assets	874	836
Prepaid expenses	522	438
Fair value of hedging derivatives	482	784
Federal Reserve Bank stock	469	466
Seed capital	303	395
Due from customers on acceptances	129	340
Private equity	46	43
Other	1,035	1,189
Total other assets	$ 21,515	$ 20,954

Other assets - Seed Capital and

Other assets - Seed Capital and Private Equity Investments Valued Using Net Asset Value (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Fair value	$ 150		$ 214
Unfunded commitments	46		47
Seed capital and other funds
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Fair value	104		171
Unfunded commitments	$ 1		$ 1
Redemption frequency	Daily-quarterly		Daily-quarterly
Private equity investments
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Fair value	$ 46		$ 43
Unfunded commitments	$ 45		$ 46
Minimum | Seed capital and other funds
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Redemption notice period	1 day	1 day
Maximum | Seed capital and other funds
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Redemption notice period	95 days	180 days

Other assets - Qualified Afford

Other assets - Qualified Affordable Housing Project Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Other Assets [Abstract]
Tax advantaged low income housing investments	$ 900	$ 914
Qualified affordable housing project investments, commitment	355	369
Qualified affordable housing project commitment - 2017	126
Qualified affordable housing project commitment - 2018	132
Qualified affordable housing project commitment - 2019	81
Qualified affordable housing project commitment - 2020	2
Qualified affordable housing project commitment - 2021	1
Qualified affordable housing project commitment - 2022 and thereafter	13
Tax credits and other tax benefits	38	40	$ 38
Amortization expense included in the provision for income taxes	$ 27	$ 29	$ 28

Net interest revenue (Details)

Net interest revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Interest revenue
Non-margin loans	$ 245	$ 236	$ 205
Margin loans	75	71	63
Securities:
Taxable	461	465	444
Exempt from federal income taxes	17	17	18
Total securities	478	482	462
Deposits with banks	22	28	26
Deposits with the Federal Reserve and other central banks	57	28	61
Federal funds sold and securities purchased under resale agreements	67	66	49
Trading assets	16	17	17
Total interest revenue	960	928	883
Interest expense
Deposits	9	(5)	15
Federal funds purchased and securities sold under repurchase agreements	24	8	9
Trading liabilities	2	1	2
Other borrowed funds	2	3	2
Commercial paper	5	0	0
Customer payables	7	3	4
Long-term debt	119	87	85
Total interest expense	168	97	117
Net interest revenue	792	831	766
Provision	(5)	7	10
Interest Income (Expense), after Provision for Loan Loss	$ 797	$ 824	$ 756

Employee benefit plans (Details

Employee benefit plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Domestic pension benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0
Interest cost	45	45
Expected return on assets	(81)	(82)
Other	17	18
Net periodic benefit (credit) cost	(19)	(19)
Foreign pension benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	8
Interest cost	8	9
Expected return on assets	(12)	(13)
Other	9	4
Net periodic benefit (credit) cost	12	8
Healthcare benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1
Interest cost	2	2
Expected return on assets	(2)	(2)
Other	(1)	(1)
Net periodic benefit (credit) cost	$ (1)	$ 0

Income taxes (Details)

Income taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 269	$ 280	$ 283
Effective tax rate	22.30%		25.90%
Tax reserves	$ 150	$ 146
Impact on effective tax rate if tax reserves were unnecessary	150
Accrued interest, related to income taxes in the balance sheet	21
Additional tax expense related to interest	2		$ 2
Reasonably possible decrease in uncertain tax positions within the next 12 months, if a re-evaluation is required	$ 13

Securitizations and variable 75

Securitizations and variable interest entities - Incremental Assets and Liabilities of Variable Interest Entities Included in Consolidated Financial Statements (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Nonredeemable noncontrolling interests of consolidated investment management funds	$ 534	$ 618
VIE classification of carrying amount, assets	85	114
VIE classification of carrying amount, liabilities	1	3
Noncontrolling interest in VIE	14	25
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Available-for-sale	400	400
Trading assets	883	979
Other assets	144	252
Subtotal assets of consolidated investment management funds, at fair value	1,427	1,631
Trading liabilities		282
Other liabilities	573	396
Subtotal liabilities of consolidated investment management funds, at fair value	573	678
Nonredeemable noncontrolling interests of consolidated investment management funds	534	618
Variable Interest Entity, Primary Beneficiary [Member] | Investment Management funds
Variable Interest Entity [Line Items]
Available-for-sale	0	0
Trading assets	883	979
Other assets	144	252
Subtotal assets of consolidated investment management funds, at fair value	1,027	1,231
Trading liabilities		282
Other liabilities	209	33
Subtotal liabilities of consolidated investment management funds, at fair value	209	315
Nonredeemable noncontrolling interests of consolidated investment management funds	534	618
Variable Interest Entity, Primary Beneficiary [Member] | Securitizations
Variable Interest Entity [Line Items]
Available-for-sale	400	400
Trading assets	0	0
Other assets	0	0
Subtotal assets of consolidated investment management funds, at fair value	400	400
Trading liabilities		0
Other liabilities	364	363
Subtotal liabilities of consolidated investment management funds, at fair value	364	363
Nonredeemable noncontrolling interests of consolidated investment management funds	$ 0	$ 0

Securitizations and variable 76

Securitizations and variable interest entities - Non-consolidated Variable Interest Entities (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Other Assets and Liabilities, Net
Variable Interest Entity [Line Items]
Assets	$ 2,451	$ 2,442
Liabilities	355	369
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum loss exposure	$ 2,806	$ 2,811

Preferred stock - Narrative (De

Preferred stock - Narrative (Details) - $ / shares	Mar. 20, 2017	Mar. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Preferred stock, shares authorized (shares)		100,000,000	100,000,000
Preferred stock, par value (usd per share)		$ 0.01	$ 0.01
Series A Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Dividend paid per share (usd per share)	$ 1,000
Preferred stock, dividend rate per normal preferred capital security (usd per share)	$ 10
Depository share, portion of preferred stock share	1.00%
Series C Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Dividend paid per share (usd per share)	$ 1,300
Preferred stock, dividend rate per depository share (usd per share)	$ 0.325
Depository share, portion of preferred stock share	0.025%
Series F Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Dividend paid per share (usd per share)	$ 2,942.01
Preferred stock, dividend rate per depository share (usd per share)	$ 29.4201
Depository share, portion of preferred stock share	1.00%

Preferred stock - Summary (Deta

Preferred stock - Summary (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 20, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Total shares issued and outstanding (shares)	35,826		35,826
Carrying value	$ 3,542		$ 3,542
Series A Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Per annum dividend rate	Greater of (i) three-month LIBOR plus 0.565% for the related distribution period; or (ii) 4.000%
Per annum dividend rate	4.00%
Liquidation preference per share (usd per share)	$ 100,000
Total shares issued and outstanding (shares)	5,001		5,001
Carrying value	$ 500		$ 500
Depository share, portion of preferred stock share		1.00%
Series A Noncumulative Perpetual Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred stock, basis spread on variable rate	0.565%
Series C Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Per annum dividend rate	5.20%
Liquidation preference per share (usd per share)	$ 100,000
Total shares issued and outstanding (shares)	5,825		5,825
Carrying value	$ 568		$ 568
Depository share, portion of preferred stock share		0.025%
Series D Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Per annum dividend rate	4.50% to but excluding June 20, 2023, then a floating rate equal to the three-month LIBOR plus 2.46%
Per annum dividend rate	4.50%
Liquidation preference per share (usd per share)	$ 100,000
Total shares issued and outstanding (shares)	5,000		5,000
Carrying value	$ 494		$ 494
Series D Noncumulative Perpetual Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred stock, basis spread on variable rate	2.46%
Series E Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Per annum dividend rate	4.95% to and including June 20, 2020, then a floating rate equal to the three-month LIBOR plus 3.42%
Per annum dividend rate	4.95%
Liquidation preference per share (usd per share)	$ 100,000
Total shares issued and outstanding (shares)	10,000		10,000
Carrying value	$ 990		$ 990
Series E Noncumulative Perpetual Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred stock, basis spread on variable rate	3.42%
Series F Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Per annum dividend rate	4.625% to and including Sept. 20, 2026, then a floating rate equal to the three-month LIBOR plus 3.131%
Per annum dividend rate	4.625%
Liquidation preference per share (usd per share)	$ 100,000
Total shares issued and outstanding (shares)	10,000		10,000
Carrying value	$ 990		$ 990
Depository share, portion of preferred stock share		1.00%
Series F Noncumulative Perpetual Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred stock, basis spread on variable rate	3.131%

Other comprehensive income (l79

Other comprehensive income (loss) - Components (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
After-tax amount
Total other comprehensive (loss), net of tax	[1]	$ 243	$ (988)	$ 205
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Pre-tax amount
Total other comprehensive income (loss), Pre-tax amount		293	(1,165)	298
Tax (expense) benefit
Total other comprehensive income (loss), Tax (expense) benefit		(50)	177	(93)
After-tax amount
Total other comprehensive (loss), net of tax		243	(988)	205
Foreign currency translation
Pre-tax amount
Other comprehensive income (loss), Pre-tax amount		96	(295)	45
Total other comprehensive income (loss), Pre-tax amount		96	(295)	45
Tax (expense) benefit
Other comprehensive income (loss), Tax (expense) benefit		29	(122)	(8)
Total other comprehensive income (loss), Tax (expense) benefit		29	(122)	(8)
After-tax amount
Other comprehensive income (loss), After-tax amount		125	(417)	37
Total other comprehensive (loss), net of tax		125	(417)	37
Unrealized gain (loss) on assets available-for-sale
Pre-tax amount
Other comprehensive income (loss), Pre-tax amount		164	(726)	243
Reclassification adjustment, Pre-tax amount		(10)	(10)	(20)
Total other comprehensive income (loss), Pre-tax amount		154	(736)	223
Tax (expense) benefit
Other comprehensive income (loss), Tax (expense) benefit		(70)	257	(80)
Reclassification adjustment, Tax (expense) benefit		4	4	5
Total other comprehensive income (loss), Tax (expense) benefit		(66)	261	(75)
After-tax amount
Other comprehensive income (loss), After-tax amount		94	(469)	163
Reclassification adjustment, After-tax amount		(6)	(6)	(15)
Total other comprehensive (loss), net of tax		88	(475)	148
Net gain (loss) arising during the period
Pre-tax amount
Other comprehensive income (loss), Pre-tax amount		3	(154)	3
Tax (expense) benefit
Other comprehensive income (loss), Tax (expense) benefit		(1)	44	(1)
After-tax amount
Other comprehensive income (loss), After-tax amount		2	(110)	2
Foreign exchange adjustment
Pre-tax amount
Other comprehensive income (loss), Pre-tax amount		0	(1)	0
Tax (expense) benefit
Other comprehensive income (loss), Tax (expense) benefit		0	1	0
After-tax amount
Other comprehensive income (loss), After-tax amount		0	0	0
Defined benefit plans
Pre-tax amount
Reclassification adjustment, Pre-tax amount		25	23	22
Total other comprehensive income (loss), Pre-tax amount		28	(132)	25
Tax (expense) benefit
Reclassification adjustment, Tax (expense) benefit		(7)	(9)	(7)
Total other comprehensive income (loss), Tax (expense) benefit		(8)	36	(8)
After-tax amount
Reclassification adjustment, After-tax amount		18	14	15
Total other comprehensive (loss), net of tax		20	(96)	17
Unrealized gain (loss) on cash flow hedges
Pre-tax amount
Other comprehensive income (loss), Pre-tax amount		14	63	(81)
Reclassification adjustment, Pre-tax amount		1	(65)	86
Total other comprehensive income (loss), Pre-tax amount		15	(2)	5
Tax (expense) benefit
Other comprehensive income (loss), Tax (expense) benefit		(5)	(20)	27
Reclassification adjustment, Tax (expense) benefit		0	22	(29)
Total other comprehensive income (loss), Tax (expense) benefit		(5)	2	(2)
After-tax amount
Other comprehensive income (loss), After-tax amount		9	43	(54)
Reclassification adjustment, After-tax amount		1	(43)	57
Total other comprehensive (loss), net of tax		$ 10	$ 0	$ 3
[1]	Other comprehensive income (loss) attributable to The Bank of New York Mellon Corporation shareholders was $241 million for the quarter ended March 31, 2017, $(980) million for the quarter ended Dec. 31, 2016 and $210 million for the quarter ended March 31, 2016.

Other comprehensive income (l80

Other comprehensive income (loss) Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance		$ 38,811
Change in accumulated other comprehensive income (loss)	[1]	243	$ (988)	$ 205
Ending Balance		39,138	38,811
Foreign currency translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax		29	(122)	(8)
Other comprehensive income (loss), Pre-tax amount		96	(295)	45
Other Comprehensive Income (Loss) before Reclassifications, Tax		29	(122)	(8)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		125	(417)	37
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Change in accumulated other comprehensive income (loss)		125	(417)	37
Other Comprehensive Income (Loss), before Tax		96	(295)	45
Unrealized gain (loss) on assets available-for-sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment, Tax (expense) benefit		4	4	5
Other Comprehensive Income (Loss), Tax		(66)	261	(75)
Other comprehensive income (loss), Pre-tax amount		164	(726)	243
Other Comprehensive Income (Loss) before Reclassifications, Tax		(70)	257	(80)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		94	(469)	163
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Change in accumulated other comprehensive income (loss)		88	(475)	148
Other Comprehensive Income (Loss), before Tax		154	(736)	223
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(6)	(6)	(15)
Reclassification adjustment, Pre-tax amount		(10)	(10)	(20)
Net gain (loss) arising during the period
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), Pre-tax amount		3	(154)	3
Other Comprehensive Income (Loss) before Reclassifications, Tax		(1)	44	(1)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		2	(110)	2
Foreign exchange adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), Pre-tax amount		0	(1)	0
Other Comprehensive Income (Loss) before Reclassifications, Tax		0	1	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		0	0	0
Defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment, Tax (expense) benefit		(7)	(9)	(7)
Other Comprehensive Income (Loss), Tax		(8)	36	(8)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Change in accumulated other comprehensive income (loss)		20	(96)	17
Other Comprehensive Income (Loss), before Tax		28	(132)	25
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		18	14	15
Reclassification adjustment, Pre-tax amount		25	23	22
Unrealized gain (loss) on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment, Tax (expense) benefit		0	22	(29)
Other Comprehensive Income (Loss), Tax		(5)	2	(2)
Other comprehensive income (loss), Pre-tax amount		14	63	(81)
Other Comprehensive Income (Loss) before Reclassifications, Tax		(5)	(20)	27
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		9	43	(54)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Change in accumulated other comprehensive income (loss)		10	0	3
Other Comprehensive Income (Loss), before Tax		15	(2)	5
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		1	(43)	57
Reclassification adjustment, Pre-tax amount		1	(65)	86
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax		(50)	177	(93)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Change in accumulated other comprehensive income (loss)		243	(988)	205
Other Comprehensive Income (Loss), before Tax		$ 293	$ (1,165)	$ 298
[1]	Other comprehensive income (loss) attributable to The Bank of New York Mellon Corporation shareholders was $241 million for the quarter ended March 31, 2017, $(980) million for the quarter ended Dec. 31, 2016 and $210 million for the quarter ended March 31, 2016.

Fair value measurement - Assets

Fair value measurement - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	$ 2,945	$ 4,264
Derivative liabilities	2,404	4,401
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(7,595)	(10,257)
Netting	(8,228)	(10,047)
Fair Value, Measurements, Recurring | Sovereign debt/sovereign guaranteed
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	12,171	12,489
Fair Value, Measurements, Recurring | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	597	638
Fair Value, Measurements, Recurring | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,067	2,141
Fair Value, Measurements, Recurring | Total trading assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(7,595)	(10,257)
Fair Value, Measurements, Recurring | Operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(7,595)	(10,257)
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	283	268
Subtotal assets of consolidated investment management funds, at fair value	$ 19,477	$ 18,070
Percentage of assets prior to netting	22.00%	20.00%
Subtotal liabilities of consolidated investment management funds, at fair value	$ 780	$ 356
Percentage of liabilities prior to netting	6.00%	2.00%
Fair Value, Measurements, Recurring | Level 1 | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 18,488	$ 17,094
Fair Value, Measurements, Recurring | Level 1 | Securities available-for-sale | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	15,667	14,307
Fair Value, Measurements, Recurring | Level 1 | Securities available-for-sale | Sovereign debt/sovereign guaranteed
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	68	66
Fair Value, Measurements, Recurring | Level 1 | Securities available-for-sale | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	3	3
Fair Value, Measurements, Recurring | Level 1 | Securities available-for-sale | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	853	842
Fair Value, Measurements, Recurring | Level 1 | Securities available-for-sale | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,897	1,876
Fair Value, Measurements, Recurring | Level 1 | Total trading assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	340	240
Trading assets	343	244
Fair Value, Measurements, Recurring | Level 1 | Total other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	283	268
Fair Value, Measurements, Recurring | Level 1 | Operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value	$ 19,114	$ 17,606
Percentage of assets prior to netting	22.00%	19.00%
Fair Value, Measurements, Recurring | Level 1 | Investment management funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value	$ 363	$ 464
Subtotal liabilities of consolidated investment management funds, at fair value	1	3
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	523	857
Subtotal assets of consolidated investment management funds, at fair value	$ 70,443	$ 74,098
Percentage of assets prior to netting	78.00%	80.00%
Subtotal liabilities of consolidated investment management funds, at fair value	$ 11,392	$ 15,355
Percentage of liabilities prior to netting	94.00%	98.00%
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 57,092	$ 56,728
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	351	359
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Sovereign debt/sovereign guaranteed
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	12,103	12,423
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	3,305	3,378
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	22,734	22,736
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	597	638
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Other RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	451	513
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	911	928
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	7,111	6,449
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | CLOs
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,570	2,598
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,456	1,727
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,366	1,396
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,669	1,961
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	170	265
Fair Value, Measurements, Recurring | Level 2 | Securities available-for-sale | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,298	1,357
Fair Value, Measurements, Recurring | Level 2 | Total trading assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	2,109	2,013
Trading assets	12,164	15,746
Fair Value, Measurements, Recurring | Level 2 | Total other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	41	73
Fair Value, Measurements, Recurring | Level 2 | Operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value	$ 69,779	$ 73,331
Percentage of assets prior to netting	78.00%	81.00%
Fair Value, Measurements, Recurring | Level 2 | Investment management funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value	$ 664	$ 767
Subtotal liabilities of consolidated investment management funds, at fair value	208	312
Not designated as hedging | Fair Value, Measurements, Recurring | Total trading assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(7,595)	(10,257)
Not designated as hedging | Fair Value, Measurements, Recurring | Total trading assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(5,365)	(6,047)
Not designated as hedging | Fair Value, Measurements, Recurring | Total trading assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(2,195)	(4,172)
Not designated as hedging | Fair Value, Measurements, Recurring | Total trading assets | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(35)	(38)
Not designated as hedging | Fair Value, Measurements, Recurring | Level 1 | Total trading assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	3	4
Not designated as hedging | Fair Value, Measurements, Recurring | Level 1 | Total trading assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	3	4
Not designated as hedging | Fair Value, Measurements, Recurring | Level 1 | Total trading assets | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	0	0
Not designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total trading assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	10,055	13,733
Not designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total trading assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	6,885	7,583
Not designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total trading assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	3,119	6,104
Not designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total trading assets | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	51	46
Designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	482	784
Designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total other assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	327	415
Designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total other assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	155	369
Parent Company | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(8,228)	(10,047)
Parent Company | Fair Value, Measurements, Recurring | Total trading liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(8,228)	(10,047)
Parent Company | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal liabilities of consolidated investment management funds, at fair value	$ 779	$ 353
Percentage of liabilities prior to netting	7.00%	2.00%
Parent Company | Fair Value, Measurements, Recurring | Level 1 | Total trading liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	$ 777	$ 349
Trading liabilities	779	353
Parent Company | Fair Value, Measurements, Recurring | Level 1 | Total other liabilities – derivative liabilities designated as hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total other liabilities – derivative liabilities designated as hedging	0
Parent Company | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term debt	364	363
Subtotal liabilities of consolidated investment management funds, at fair value	$ 11,184	$ 15,043
Percentage of liabilities prior to netting	93.00%	98.00%
Parent Company | Fair Value, Measurements, Recurring | Level 2 | Total trading liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	$ 190	$ 236
Trading liabilities	10,265	14,083
Parent Company | Fair Value, Measurements, Recurring | Level 2 | Total other liabilities – derivative liabilities designated as hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total other liabilities – derivative liabilities designated as hedging	555
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(8,228)	(10,047)
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading liabilities | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(6,529)	(6,634)
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading liabilities | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(1,645)	(3,363)
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading liabilities | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting	(54)	(50)
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Level 1 | Total trading liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	2	4
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Level 1 | Total trading liabilities | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	2	4
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Level 1 | Total trading liabilities | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	0	0
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total trading liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	10,075	13,847
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total trading liabilities | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	6,899	7,629
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total trading liabilities | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	3,055	6,103
Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total trading liabilities | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	121	115
Parent Company | Designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total other liabilities – derivative liabilities designated as hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities		597
Parent Company | Designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total other liabilities – derivative liabilities designated as hedging | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	467	545
Parent Company | Designated as hedging | Fair Value, Measurements, Recurring | Level 2 | Total other liabilities – derivative liabilities designated as hedging | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	88	52
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans	59,119	62,564
Other assets	6,464	5,934
Subtotal assets of consolidated investment management funds, at fair value	211,253	208,331
Long-term debt	25,982	24,100
Carrying Amount | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	956	1,339
Subtotal assets of consolidated investment management funds, at fair value	82,475	82,125
Subtotal liabilities of consolidated investment management funds, at fair value	3,944	5,664
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	75,580	73,822
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	15,667	14,307
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	351	359
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Sovereign debt/sovereign guaranteed
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	12,171	12,489
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	3,305	3,378
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	22,734	22,736
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	597	638
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Other RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	451	513
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	911	928
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	7,111	6,449
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | CLOs
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,570	2,598
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,456	1,727
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	3	3
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	853	842
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,366	1,396
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,669	1,961
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,067	2,141
Carrying Amount | Fair Value, Measurements, Recurring | Securities available-for-sale | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,298	1,357
Carrying Amount | Fair Value, Measurements, Recurring | Total trading assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	2,449	2,253
Trading assets	4,912	5,733
Carrying Amount | Fair Value, Measurements, Recurring | Total other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	324	341
Carrying Amount | Fair Value, Measurements, Recurring | Other assets measured at net asset value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	150	214
Carrying Amount | Fair Value, Measurements, Recurring | Operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value	81,448	80,894
Carrying Amount | Fair Value, Measurements, Recurring | Investment management funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value	1,027	1,231
Subtotal liabilities of consolidated investment management funds, at fair value	209	315
Carrying Amount | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	2,463	3,480
Carrying Amount | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	1,523	1,540
Carrying Amount | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	924	1,932
Carrying Amount | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading assets | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	16	8
Carrying Amount | Designated as hedging | Fair Value, Measurements, Recurring | Total other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	482	784
Carrying Amount | Designated as hedging | Fair Value, Measurements, Recurring | Total other assets | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	327	415
Carrying Amount | Designated as hedging | Fair Value, Measurements, Recurring | Total other assets | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative assets	155	369
Carrying Amount | Parent Company | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term debt	364	363
Subtotal liabilities of consolidated investment management funds, at fair value	3,735	5,349
Carrying Amount | Parent Company | Fair Value, Measurements, Recurring | Total trading liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	967	585
Trading liabilities	2,816	4,389
Carrying Amount | Parent Company | Fair Value, Measurements, Recurring | Total other liabilities – derivative liabilities designated as hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total other liabilities – derivative liabilities designated as hedging	555
Carrying Amount | Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	1,849	3,804
Carrying Amount | Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading liabilities | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	372	999
Carrying Amount | Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading liabilities | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	1,410	2,740
Carrying Amount | Parent Company | Not designated as hedging | Fair Value, Measurements, Recurring | Total trading liabilities | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	67	65
Carrying Amount | Parent Company | Designated as hedging | Fair Value, Measurements, Recurring | Total other liabilities – derivative liabilities designated as hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities		597
Carrying Amount | Parent Company | Designated as hedging | Fair Value, Measurements, Recurring | Total other liabilities – derivative liabilities designated as hedging | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	467	545
Carrying Amount | Parent Company | Designated as hedging | Fair Value, Measurements, Recurring | Total other liabilities – derivative liabilities designated as hedging | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	$ 88	$ 52

Fair value measurement - Detail

Fair value measurement - Details of Certain Items Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 597	$ 638
Non-agency RMBS | 2007
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	51	58
Non-agency RMBS | 2006
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	93	98
Non-agency RMBS | 2005
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	169	180
Non-agency RMBS | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 284	$ 302
Non-agency RMBS | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	9.00%	9.00%
Non-agency RMBS | AAA/ AA- | 2005
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	24.00%	23.00%
Non-agency RMBS | AAA/ AA- | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	5.00%	5.00%
Non-agency RMBS | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	2.00%	3.00%
Non-agency RMBS | A/ A- | 2005
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	3.00%	5.00%
Non-agency RMBS | A/ A- | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	3.00%	3.00%
Non-agency RMBS | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	13.00%	14.00%
Non-agency RMBS | BBB/ BBB- | 2007
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings		0.00%
Non-agency RMBS | BBB/ BBB- | 2005
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	7.00%	9.00%
Non-agency RMBS | BBB/ BBB- | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	23.00%	24.00%
Non-agency RMBS | BB and lower
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	76.00%	74.00%
Non-agency RMBS | BB and lower | 2007
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Non-agency RMBS | BB and lower | 2006
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Non-agency RMBS | BB and lower | 2005
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	66.00%	63.00%
Non-agency RMBS | BB and lower | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	69.00%	68.00%
Commercial MBS | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 862	$ 881
Commercial MBS | 2007 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	142	190
Commercial MBS | 2006 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2	3
Commercial MBS | 2009-2017 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	705	674
Commercial MBS | 2008 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 13	$ 14
Commercial MBS | AAA/ AA- | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	82.00%	81.00%
Commercial MBS | AAA/ AA- | 2007 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	62.00%	71.00%
Commercial MBS | AAA/ AA- | 2006 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	6.00%	7.00%
Commercial MBS | AAA/ AA- | 2009-2017 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	86.00%	84.00%
Commercial MBS | AAA/ AA- | 2008 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Commercial MBS | A/ A- | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	18.00%	19.00%
Commercial MBS | A/ A- | 2007 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	38.00%	29.00%
Commercial MBS | A/ A- | 2006 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	3.00%	93.00%
Commercial MBS | A/ A- | 2009-2017 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	14.00%	16.00%
Commercial MBS | A/ A- | 2008 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings		0.00%
Commercial MBS | BBB/ BBB- | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Commercial MBS | BBB/ BBB- | 2007 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Commercial MBS | BB and lower | 2006 | Total Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	91.00%
Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 2,067	$ 2,141
Foreign covered bonds | Canada
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,468	1,320
Foreign covered bonds | United Kingdom
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	112	280
Foreign covered bonds | Netherlands
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	162	160
Foreign covered bonds | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 325	$ 381
Foreign covered bonds | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | AAA/ AA- | Canada
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | AAA/ AA- | United Kingdom
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | AAA/ AA- | Netherlands
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | AAA/ AA- | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Total European floating rate notes - available-for-sale | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 500	$ 562
Total European floating rate notes - available-for-sale | Securities available-for-sale | United Kingdom
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	321	379
Total European floating rate notes - available-for-sale | Securities available-for-sale | Netherlands
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	121	125
Total European floating rate notes - available-for-sale | Securities available-for-sale | Ireland
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 58	$ 58
Total European floating rate notes - available-for-sale | AAA/ AA- | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	81.00%	83.00%
Total European floating rate notes - available-for-sale | AAA/ AA- | Securities available-for-sale | United Kingdom
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	88.00%	90.00%
Total European floating rate notes - available-for-sale | AAA/ AA- | Securities available-for-sale | Netherlands
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Total European floating rate notes - available-for-sale | AAA/ AA- | Securities available-for-sale | Ireland
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings		0.00%
Total European floating rate notes - available-for-sale | A/ A- | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	7.00%	7.00%
Total European floating rate notes - available-for-sale | A/ A- | Securities available-for-sale | United Kingdom
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	12.00%	10.00%
Total European floating rate notes - available-for-sale | A/ A- | Securities available-for-sale | Ireland
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Total European floating rate notes - available-for-sale | BBB/ BBB- | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	12.00%	10.00%
Total European floating rate notes - available-for-sale | BBB/ BBB- | Securities available-for-sale | Ireland
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Total European floating rate notes - available-for-sale | BB and lower | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Total European floating rate notes - available-for-sale | BB and lower | Securities available-for-sale | Ireland
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Sovereign debt/sovereign guaranteed
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 12,171	$ 12,489
Sovereign debt/sovereign guaranteed | United Kingdom
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,816	3,209
Sovereign debt/sovereign guaranteed | France
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,005	1,998
Sovereign debt/sovereign guaranteed | Spain
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,774	1,749
Sovereign debt/sovereign guaranteed | Germany
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,394	1,347
Sovereign debt/sovereign guaranteed | Italy
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,138	1,130
Sovereign debt/sovereign guaranteed | Netherlands
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,019	1,061
Sovereign debt/sovereign guaranteed | Belgium
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	958	1,005
Sovereign debt/sovereign guaranteed | Ireland
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	735	736
Sovereign debt/sovereign guaranteed | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	332	254
Sovereign debt/sovereign guaranteed | Brazil
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 140	$ 73
Sovereign debt/sovereign guaranteed | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	69.00%	70.00%
Sovereign debt/sovereign guaranteed | AAA/ AA- | United Kingdom
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | AAA/ AA- | France
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | AAA/ AA- | Germany
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | AAA/ AA- | Italy
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings		0.00%
Sovereign debt/sovereign guaranteed | AAA/ AA- | Netherlands
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | AAA/ AA- | Belgium
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | AAA/ AA- | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	58.00%	71.00%
Sovereign debt/sovereign guaranteed | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	6.00%	6.00%
Sovereign debt/sovereign guaranteed | A/ A- | Ireland
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	24.00%	23.00%
Sovereign debt/sovereign guaranteed | BBB/ BBB- | Spain
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | BBB/ BBB- | Germany
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings		0.00%
Sovereign debt/sovereign guaranteed | BBB/ BBB- | Italy
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | BBB/ BBB- | Ireland
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Sovereign debt/sovereign guaranteed | BBB/ BBB- | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Sovereign debt/sovereign guaranteed | BB and lower
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	1.00%	1.00%
Sovereign debt/sovereign guaranteed | BB and lower | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	42.00%	29.00%
Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 1,298	$ 1,357
Non-agency RMBS | 2007
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	376	387
Non-agency RMBS | 2006
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	373	391
Non-agency RMBS | 2005
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	414	437
Non-agency RMBS | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	$ 135	$ 142
Non-agency RMBS | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Non-agency RMBS | AAA/ AA- | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	2.00%	2.00%
Non-agency RMBS | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	1.00%	1.00%
Non-agency RMBS | A/ A- | 2006
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Non-agency RMBS | A/ A- | 2005
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	2.00%	2.00%
Non-agency RMBS | A/ A- | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	2.00%	2.00%
Non-agency RMBS | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	2.00%	2.00%
Non-agency RMBS | BBB/ BBB- | 2006
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Non-agency RMBS | BBB/ BBB- | 2005
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	1.00%	1.00%
Non-agency RMBS | BBB/ BBB- | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	17.00%	17.00%
Non-agency RMBS | BB and lower
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	97.00%	97.00%
Non-agency RMBS | BB and lower | 2007
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Non-agency RMBS | BB and lower | 2006
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Non-agency RMBS | BB and lower | 2005
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	97.00%	97.00%
Non-agency RMBS | BB and lower | 2004 and earlier
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	79.00%	79.00%

Fair value measurement -Fair va

Fair value measurement -Fair value measurements for assets using significant unobservable inputs (Details) - Total Assets - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains or (losses) for the period included in earnings (or changes in net assets)	$ 2
Purchases	48
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	69	$ 0
Transfers into Level 3	$ 19

Fair value measurement - Signif

Fair value measurement - Significant Unobservable Inputs (Details) - Total Assets $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Fair value measurements for assets using significant unobservable inputs
Beginning balance	$ 0
Transfers into Level 3	19
Total gains or (losses) for the period included in earnings (or changes in net assets)	2
Purchases	48
Ending balance	69
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	$ 2

Fair value measurement - Asse85

Fair value measurement - Assets Measured at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in fair value of loans of underlying collateral	$ (1)	$ (1)
Measured at fair value on a nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	86	91
Other assets	40	4
Subtotal assets of consolidated investment management funds, at fair value	126	95
Level 1 | Measured at fair value on a nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Other assets	0	0
Subtotal assets of consolidated investment management funds, at fair value	0	0
Level 2 | Measured at fair value on a nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	83	84
Other assets	5	4
Subtotal assets of consolidated investment management funds, at fair value	88	88
Level 3 | Measured at fair value on a nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	3	7
Other assets	35	0
Subtotal assets of consolidated investment management funds, at fair value	$ 38	$ 7

Fair value measurement - Carryi

Fair value measurement - Carrying Amount and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Estimated Fair Value
Assets:
Interest-bearing deposits with the Federal Reserve and other central banks	$ 65,086	$ 58,041
Interest-bearing deposits with banks	14,554	15,091
Federal funds sold and securities purchased under resale agreements	25,776	25,801
Securities held-to-maturity	40,066	40,669
Loans	59,399	62,829
Other financial assets	6,464	5,934
Subtotal assets of consolidated investment management funds, at fair value	211,345	208,365
Liabilities:
Noninterest-bearing deposits	79,771	78,342
Interest-bearing deposits	139,777	141,418
Federal funds purchased and securities sold under repurchase agreements	11,149	9,989
Payables to customers and broker-dealers	21,306	20,987
Commercial Paper	2,543
Borrowings	1,185	960
Long-term debt	26,149	24,184
Total liabilities	281,880	275,880
Estimated Fair Value | Level 1
Assets:
Securities held-to-maturity	10,656	11,173
Other financial assets	5,366	4,822
Subtotal assets of consolidated investment management funds, at fair value	16,022	15,995
Estimated Fair Value | Level 2
Assets:
Interest-bearing deposits with the Federal Reserve and other central banks	65,086	58,041
Interest-bearing deposits with banks	14,554	15,091
Federal funds sold and securities purchased under resale agreements	25,776	25,801
Securities held-to-maturity	29,410	29,496
Loans	59,399	62,829
Other financial assets	1,098	1,112
Subtotal assets of consolidated investment management funds, at fair value	195,323	192,370
Liabilities:
Noninterest-bearing deposits	79,771	78,342
Interest-bearing deposits	139,777	141,418
Federal funds purchased and securities sold under repurchase agreements	11,149	9,989
Payables to customers and broker-dealers	21,306	20,987
Commercial Paper	2,543
Borrowings	1,185	960
Long-term debt	26,149	24,184
Total liabilities	281,880	275,880
Carrying Amount
Assets:
Interest-bearing deposits with the Federal Reserve and other central banks	65,086	58,041
Interest-bearing deposits with banks	14,554	15,086
Federal funds sold and securities purchased under resale agreements	25,776	25,801
Securities held-to-maturity	40,254	40,905
Loans	59,119	62,564
Other financial assets	6,464	5,934
Subtotal assets of consolidated investment management funds, at fair value	211,253	208,331
Liabilities:
Noninterest-bearing deposits	79,771	78,342
Interest-bearing deposits	141,520	143,148
Federal funds purchased and securities sold under repurchase agreements	11,149	9,989
Payables to customers and broker-dealers	21,306	20,987
Commercial Paper	2,543
Borrowings	1,185	960
Long-term debt	25,982	24,100
Total liabilities	$ 283,456	$ 277,526

Fair value measurement - Summar

Fair value measurement - Summary of Carrying Amount of Hedged Financial Instruments, Related Notional Amount of Hedge and Estimated Fair Value of Derivatives (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Securities available-for-sale
Derivative [Line Items]
Carrying amount	$ 10,494	$ 9,184
Notional amount of hedge	10,549	9,233
Unrealized Gain	96	83
Unrealized (Loss)	(271)	(342)
Long-term debt
Derivative [Line Items]
Carrying amount	22,192	20,511
Notional amount of hedge	22,200	20,450
Unrealized Gain	228	330
Unrealized (Loss)	$ (196)	$ (203)

Fair value option - Assets and

Fair value option - Assets and Liabilities, by Type, of Consolidated Investment Management Funds Recorded at Fair Value (Detail) - Investment Management funds - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Assets of consolidated investment management funds:
Trading assets	$ 883	$ 979
Other assets	144	252
Subtotal assets of consolidated investment management funds, at fair value	1,027	1,231
Liabilities of consolidated investment management funds:
Trading liabilities	0	282
Other liabilities	209	33
Subtotal liabilities of consolidated investment management funds, at fair value	$ 209	$ 315

Fair value option - Changes in

Fair value option - Changes in Fair Value of Loans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Loans Receivable [Member] | Investment and Other Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) change in fair value	$ 0	$ (1)	$ 9
Long-term debt | Foreign Exchange And Other Trading [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) change in fair value	$ (1)	$ 13	$ (13)

Fair value option - Narrative (

Fair value option - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]
Long-term debt, carrying amount	$ 240
Operations
Fair Value, Option, Quantitative Disclosures [Line Items]
Long-term debt, fair value	$ 364	$ 363

Commitments and contingent li91

Commitments and contingent liabilities - Significant Industry Concentrations Related to Credit Exposure (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	$ 60,868	$ 64,458
Financial institutions
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	13,341	14,689
Unfunded commitments	33,400
Total exposure	46,700
Financial institutions | Securities industry
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	3,100
Unfunded commitments	19,300
Total exposure	22,400
Financial institutions | Banks
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	7,200
Unfunded commitments	1,900
Total exposure	9,100
Financial institutions | Asset managers
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	1,600
Unfunded commitments	6,200
Total exposure	7,800
Financial institutions | Insurance
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	100
Unfunded commitments	3,500
Total exposure	3,600
Financial institutions | Government
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	100
Unfunded commitments	900
Total exposure	1,000
Financial institutions | Other
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	1,200
Unfunded commitments	1,600
Total exposure	2,800
Commercial
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	2,890	$ 2,617
Unfunded commitments	17,300
Total exposure	20,200
Commercial | Manufacturing
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	1,400
Unfunded commitments	6,600
Total exposure	8,000
Commercial | Commercial portfolio exposure (in billions)
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	700
Unfunded commitments	4,200
Total exposure	4,900
Commercial | Energy and utilities
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	500
Unfunded commitments	4,700
Total exposure	5,200
Commercial | Media and telecom
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	300
Unfunded commitments	1,800
Total exposure	$ 2,100

Commitments and contingent li92

Commitments and contingent liabilities - Summary of Off-Balance Sheet Credit Risks, Net of Participations (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Securities lending indemnifications, joint venture	$ 64,000	$ 61,000
Lending commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet credit risks	51,293	51,270
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet credit risks	3,932	4,185
Off-balance sheet credit risks participations	684	662
Commercial letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet credit risks	286	339
Securities lending indemnifications
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet credit risks	$ 338,705	$ 317,690

Commitments and contingent li93

Commitments and contingent liabilities - Standby Letters of Credits by Investment Grade (Details) - Standby letters of credit	Mar. 31, 2017	Dec. 31, 2016
Investment grade
Concentration Risk [Line Items]
Standby letters of credit by investment grade	88.00%	89.00%
Non-investment grade
Concentration Risk [Line Items]
Standby letters of credit by investment grade	12.00%	11.00%

Commitments and contingent li94

Commitments and contingent liabilities - Narrative (Details)	3 Months Ended
	Mar. 31, 2017USD ($)claimLegalMatter	Feb. 29, 2016LegalMatter	Dec. 31, 2016USD ($)	Dec. 17, 2015LegalMatter	Jun. 18, 2014trust
Commitments and Contingencies Disclosure [Line Items]
Lending commitment maturing in less than one year	$ 29,400,000,000
Lending commitment maturing in one to five years	21,500,000,000
Lending commitment maturing over five years	$ 411,000,000
Maximum maturities of prearranged contract for a securities lending transaction	90 days
Collateralization percentage generally required for a securities lending transaction with indemnification against broker default	102.00%
Securities lending indemnifications, secured amount of collateral	$ 353,000,000,000		$ 331,000,000,000
Securities lending indemnifications, joint venture	64,000,000,000		61,000,000,000
Securities lending indemnifications, collateral joint venture	$ 67,000,000,000		64,000,000,000
Loss contingency, number of MBS trusts | trust					253
Number of lawsuits pending (legal matters) | LegalMatter	15
Number of FINRA arbitration matters (in legal matters) | LegalMatter	1
Number of additional lawsuits filed (in legal matters) | LegalMatter				3
Number of putative class action lawsuits filed (in legal matters) | LegalMatter		4
Matters Related to R. Allen Stanford, Putative Class Action
Commitments and Contingencies Disclosure [Line Items]
Number of putative class actions (in claims) | claim	2
Federal Court, Southern District of New York, Breach of Contract and Violation of ERISA
Commitments and Contingencies Disclosure [Line Items]
Number of putative class actions (in claims) | claim	2
Maximum
Commitments and Contingencies Disclosure [Line Items]
Loss contingency, aggregate range of reasonable loss (up to)	$ 920,000,000
Operations
Commitments and Contingencies Disclosure [Line Items]
Allowance for lending-related commitments	112,000,000		112,000,000
Standby letters of credit
Commitments and Contingencies Disclosure [Line Items]
Standby letters of credit (SBLC) collateralized with cash and securities	283,000,000		293,000,000
SBLC expiring within one year	2,400,000,000
SBLC expiring within one to five years	1,500,000,000
Commercial letters of credit	3,932,000,000		4,185,000,000
Commercial letters of credit
Commitments and Contingencies Disclosure [Line Items]
Commercial letters of credit	$ 286,000,000		$ 339,000,000

Derivative instruments - Narrat

Derivative instruments - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Loss (recovery) on derivative	$ 0	$ 0
Non-derivative financial instruments designated as hedges of net investments in foreign subsidiaries were all long-term liabilities of BNY Mellon in various currencies	$ 163,000,000
Value-at-risk methodology assumed holding period for instruments	1 day
Value-at-risk methodology confidence level percentage	99.00%
Additional collateral the Company would have to post for existing collateral arrangements, if the company's debt rating had fallen below investment grade	$ 116,000,000
Securities available-for-sale
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Hedged financial instruments	10,500,000,000
Hedged financial instruments, notional amount of derivative	10,549,000,000		$ 9,233,000,000
Long-term debt
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Hedged financial instruments	22,200,000,000
Hedged financial instruments, notional amount of derivative	$ 22,200,000,000		$ 20,450,000,000
Interest rate swap | Securities available-for-sale
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Original maturities, maximum, of hedged instruments	30 years
Hedged financial instruments, notional amount of derivative	$ 10,500,000,000
Interest rate swap | Long-term debt
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Original maturities, maximum, of hedged instruments	30 years
Hedged financial instruments, notional amount of derivative	$ 22,200,000,000
Original maturities, minimum, of hedged instruments	5 years
Foreign exchange contracts | Net Investment Hedging
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Hedged financial instruments, notional amount of derivative	$ 7,300,000,000
Foreign exchange contracts | Maximum | Net Investment Hedging
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Hedging derivatives, maturities, maximum	2 years
Foreign exchange contracts | Forecasted Foreign Currency | Cash flow hedges
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Original maturities, maximum, of hedged instruments	9 months
Hedged financial instruments, notional amount of derivative	$ 341,000,000
Pretax loss recorded in accumulated other comprehensive income	$ 8,000,000
Foreign exchange contracts | Forecasted Foreign Currency | Maximum | Cash flow hedges
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Hedging derivatives, maturities, maximum	9 months

Derivative instruments - Ineffe

Derivative instruments - Ineffectiveness Related to Derivatives and Hedging Relationships Recorded in Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Ineffectiveness related to derivatives and hedging relationships	$ (4.2)	$ 24.8	$ (13.6)
Other
Derivative Instruments, Gain (Loss) [Line Items]
Ineffectiveness related to derivatives and hedging relationships	0	0	0
Fair value hedges of securities
Derivative Instruments, Gain (Loss) [Line Items]
Ineffectiveness related to derivatives and hedging relationships	0.6	7	(1.1)
Fair value hedges of long-term debt
Derivative Instruments, Gain (Loss) [Line Items]
Ineffectiveness related to derivatives and hedging relationships	(4.8)	17.8	(12.5)
Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Ineffectiveness related to derivatives and hedging relationships	$ 0	$ 0	$ 0

Derivative instruments - Impact

Derivative instruments - Impact of Derivative Instruments on Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	$ 10,540	$ 14,521
Asset derivatives fair value, effect of master netting agreements	(7,595)	(10,257)
Total derivatives, Net assets recognized on the balance sheet	2,945	4,264
Liability derivatives fair value	10,632	14,448
Liability derivatives fair value, effect of master netting agreements	(8,228)	(10,047)
Total derivatives, Net liabilities recognized on the balance sheet	2,404	4,401
Master netting agreements, cash collateral received	752	1,119
Master netting agreements, cash collateral paid	1,385	909
Interest rate contracts
Derivatives, Fair Value [Line Items]
Asset derivatives fair value, effect of master netting agreements	(5,365)	(6,047)
Liability derivatives fair value, effect of master netting agreements	(6,529)	(6,634)
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Asset derivatives fair value, effect of master netting agreements	(2,195)	(4,172)
Liability derivatives fair value, effect of master netting agreements	(1,645)	(3,363)
Equity contracts
Derivatives, Fair Value [Line Items]
Asset derivatives fair value, effect of master netting agreements	(35)	(38)
Liability derivatives fair value, effect of master netting agreements	(54)	(50)
Designated as hedging
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	482	784
Liability derivatives fair value	555	597
Designated as hedging | Interest rate contracts
Derivatives, Fair Value [Line Items]
Notional value	32,749	29,683
Asset derivatives fair value	327	415
Liability derivatives fair value	467	545
Designated as hedging | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Notional value	7,605	7,796
Asset derivatives fair value	155	369
Liability derivatives fair value	88	52
Not designated as hedging
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	10,058	13,737
Liability derivatives fair value	10,077	13,851
Not designated as hedging | Interest rate contracts
Derivatives, Fair Value [Line Items]
Notional value	291,694	325,412
Asset derivatives fair value	6,888	7,587
Liability derivatives fair value	6,901	7,633
Not designated as hedging | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Notional value	564,599	530,729
Asset derivatives fair value	3,119	6,104
Liability derivatives fair value	3,055	6,103
Not designated as hedging | Equity contracts
Derivatives, Fair Value [Line Items]
Notional value	1,236	1,167
Asset derivatives fair value	51	46
Liability derivatives fair value	118	112
Not designated as hedging | Credit contracts
Derivatives, Fair Value [Line Items]
Notional value	160	160
Asset derivatives fair value	0	0
Liability derivatives fair value	$ 3	$ 3

Derivative instruments - Impa98

Derivative instruments - Impact of Derivative Instruments on Income Statement (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Fair value hedging | Interest rate contracts | Net interest revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in income on derivatives	$ 10	$ 171	$ (148)
Gain or (loss) recognized in hedged item	(14)	(147)	134
Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in accumulated OCI on derivatives (effective portion)	14	63	(81)
Gain or (loss) reclassified from accumulated OCI into income (effective portion)	(1)	65	(86)
Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing)	0	0	0
Cash flow hedges | Foreign exchange contracts | Net interest revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) reclassified from accumulated OCI into income (effective portion)	0	(2)	5
Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing)	0	0	0
Cash flow hedges | Foreign exchange contracts | Net interest revenue | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in accumulated OCI on derivatives (effective portion)	0	(2)	6
Cash flow hedges | Foreign exchange contracts | Other revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) reclassified from accumulated OCI into income (effective portion)	0	0	0
Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing)	0	0	0
Cash flow hedges | Foreign exchange contracts | Other revenue | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in accumulated OCI on derivatives (effective portion)	0	0	0
Cash flow hedges | Foreign exchange contracts | Trading revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) reclassified from accumulated OCI into income (effective portion)	3	73	(89)
Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing)	0	0	0
Cash flow hedges | Foreign exchange contracts | Trading revenue | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in accumulated OCI on derivatives (effective portion)	3	73	(89)
Cash flow hedges | Foreign exchange contracts | Salary expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) reclassified from accumulated OCI into income (effective portion)	(4)	(6)	(2)
Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing)	0	0	0
Cash flow hedges | Foreign exchange contracts | Salary expense | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in accumulated OCI on derivatives (effective portion)	11	(8)	2
Net Investment Hedging | Foreign exchange contracts | Net interest revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) reclassified from accumulated OCI into income (effective portion)	0	0	0
Net Investment Hedging | Foreign exchange contracts | Net interest revenue | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in accumulated OCI on derivatives (effective portion)	(96)	332	(58)
Net Investment Hedging | Foreign exchange contracts | Other revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in income on derivatives (ineffectiveness portion and amount excluded from effectiveness testing)	$ 0	$ 0	$ 0

Derivative instruments - Revenu

Derivative instruments - Revenue from Foreign Exchange and Other Trading (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Foreign exchange	$ 154	$ 175	$ 171
Other trading revenue (loss)	10	(14)	4
Total foreign exchange and other trading revenue	$ 164	$ 161	$ 175

Derivative instruments - Fair V

Derivative instruments - Fair Value of Derivative Contracts Falling under Early Termination Provisions in Net Liability Position (Details) $ in Millions	Mar. 31, 2017USD ($)
A3 | A-
Credit Derivatives [Line Items]
Potential close-out exposures (fair value)	$ 26
Baa2 | BBB
Credit Derivatives [Line Items]
Potential close-out exposures (fair value)	540
Ba1 | BB plus
Credit Derivatives [Line Items]
Potential close-out exposures (fair value)	$ 1,483

Derivative instruments - Offset

Derivative instruments - Offsetting (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Derivative Asset [Abstract]
Derivatives subject to netting arrangements, Gross assets recognized	$ 9,412	$ 12,514
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	7,595	10,257
Derivatives subject to netting arrangements, Net assets recognized on the balance sheet	1,817	2,257
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	350	523
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Derivative assets subject to netting arrangements, gross amounts offset in the balance sheet	1,467	1,734
Total derivatives not subject to netting arrangements	1,128	2,007
Total derivatives, Gross assets recognized	10,540	14,521
Total derivatives, Net assets recognized on the balance sheet	2,945	4,264
Total derivatives, Net amount	2,595	3,741
Reverse repurchase agreements, Gross assets recognized	16,730	17,588
Reverse repurchase agreements, Gross amounts offset in the balance sheet	502	481
Reverse repurchase agreements, Net assets recognized on the balance sheet	16,228	17,107
Reverse repurchase agreements, Gross amounts not offset in the balance sheet, Financial instruments	16,228	17,104
Reverse repurchase agreements, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Reverse repurchase agreements, Net amount	0	3
Securities borrowing, Gross assets recognized	9,548	8,694
Securities borrowing, Net assets recognized on the balance sheet	9,548	8,694
Securities borrowing, Gross amounts not offset in the balance sheet, Financial instruments	9,267	8,425
Securities borrowing, Net amount	281	269
Total, Gross assets recognized	36,818	40,803
Total, Gross amounts offset in the balance sheet	8,097	10,738
Total, Net assets recognized on the balance sheet	28,721	30,065
Total, Gross amounts not offset in the balance sheet, Financial instruments	25,845	26,052
Total, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Total, Net amount	2,876	4,013
Derivative Liability [Abstract]
Derivatives subject to netting arrangements, Gross liabilities recognized	10,000	13,177
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	8,228	10,047
Derivatives subject to netting arrangements, Net liabilities recognized on the balance sheet	1,772	3,130
Derivatives subject to netting arrangements, Gross amounts not offset in the balance sheet, Financial instruments	735	1,675
Derivatives subject to netting arrangements, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Derivatives subject to netting arrangements, Net amount	1,037	1,455
Total derivatives not subject to netting arrangements	632	1,271
Total derivatives, Gross liabilities recognized	10,632	14,448
Total derivatives, Net liabilities recognized on the balance sheet	2,404	4,401
Total derivatives, Net amount	1,669	2,726
Repurchase agreements, Gross liabilities recognized	9,777	8,703
Repurchase agreements, Gross amounts offset in the balance sheet	502	481
Repurchase agreements, Net liabilities recognized on the balance sheet	9,275	8,222
Repurchase agreements, Gross amounts not offset in the balance sheet, Financial instruments	9,275	8,222
Repurchase agreements, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Repurchase agreements, Net amount	0	0
Securities lending, Gross liabilities recognized	1,501	1,615
Securities lending, Net liabilities recognized on the balance sheet	1,501	1,615
Securities lending, Gross amounts not offset in the balance sheet, Financial instruments	1,417	1,522
Securities lending, Net amount	84	93
Total, Gross liabilities recognized	21,910	24,766
Total, Gross amounts offset in the balance sheet	8,730	10,528
Total, Net liabilities recognized on the balance sheet	13,180	14,238
Total, Gross amounts not offset in the balance sheet, Financial instruments	11,427	11,419
Total, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Total, Net amount	1,753	2,819
Interest rate contracts
Derivative Asset [Abstract]
Derivatives subject to netting arrangements, Gross assets recognized	6,582	7,205
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	5,365	6,047
Derivatives subject to netting arrangements, Net assets recognized on the balance sheet	1,217	1,158
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	277	321
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Derivative assets subject to netting arrangements, gross amounts offset in the balance sheet	940	837
Derivative Liability [Abstract]
Derivatives subject to netting arrangements, Gross liabilities recognized	7,328	8,116
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	6,529	6,634
Derivatives subject to netting arrangements, Net liabilities recognized on the balance sheet	799	1,482
Derivatives subject to netting arrangements, Gross amounts not offset in the balance sheet, Financial instruments	666	1,266
Derivatives subject to netting arrangements, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Derivatives subject to netting arrangements, Net amount	133	216
Foreign exchange contracts
Derivative Asset [Abstract]
Derivatives subject to netting arrangements, Gross assets recognized	2,779	5,265
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	2,195	4,172
Derivatives subject to netting arrangements, Net assets recognized on the balance sheet	584	1,093
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	73	202
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Derivative assets subject to netting arrangements, gross amounts offset in the balance sheet	511	891
Derivative Liability [Abstract]
Derivatives subject to netting arrangements, Gross liabilities recognized	2,560	4,957
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	1,645	3,363
Derivatives subject to netting arrangements, Net liabilities recognized on the balance sheet	915	1,594
Derivatives subject to netting arrangements, Gross amounts not offset in the balance sheet, Financial instruments	12	355
Derivatives subject to netting arrangements, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Derivatives subject to netting arrangements, Net amount	903	1,239
Equity contracts
Derivative Asset [Abstract]
Derivatives subject to netting arrangements, Gross assets recognized	51	44
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	35	38
Derivatives subject to netting arrangements, Net assets recognized on the balance sheet	16	6
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	0	0
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Derivative assets subject to netting arrangements, gross amounts offset in the balance sheet	16	6
Derivative Liability [Abstract]
Derivatives subject to netting arrangements, Gross liabilities recognized	112	104
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	54	50
Derivatives subject to netting arrangements, Net liabilities recognized on the balance sheet	58	54
Derivatives subject to netting arrangements, Gross amounts not offset in the balance sheet, Financial instruments	57	54
Derivatives subject to netting arrangements, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Derivatives subject to netting arrangements, Net amount	$ 1	$ 0

Derivative instruments - Secure

Derivative instruments - Secured Borrowings (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 9,777	$ 8,703
Securities lending	1,501	1,615
Total borrowings	11,278	10,318
Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	7,567	7,003
Securities lending	1,501	1,615
Total borrowings	9,068	8,618
Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	425	400
Securities lending	0	0
Total borrowings	425	400
30 days or more
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	1,785	1,300
Securities lending	0	0
Total borrowings	1,785	1,300
U.S. Treasury
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	3,027	2,492
U.S. Treasury | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	3,014	2,488
U.S. Treasury | Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	13	4
U.S. Treasury | 30 days or more
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	0	0
U.S. government agencies
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	587	406
Securities lending	45	39
U.S. government agencies | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	523	396
Securities lending	45	39
U.S. government agencies | Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	64	10
Securities lending	0	0
U.S. government agencies | 30 days or more
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	0	0
Securities lending	0	0
Agency RMBS
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	2,899	3,680
Agency RMBS | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	2,551	3,294
Agency RMBS | Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	348	386
Agency RMBS | 30 days or more
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	0	0
Corporate bonds
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	1,566	998
Corporate bonds | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	428	304
Corporate bonds | Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	0	0
Corporate bonds | 30 days or more
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	1,138	694
Other debt securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	1,006	709
Securities lending	389	477
Other debt securities | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	616	146
Securities lending	389	477
Other debt securities | Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	0	0
Securities lending	0	0
Other debt securities | 30 days or more
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	390	563
Securities lending	0	0
Equity securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	692	418
Securities lending	1,067	1,099
Equity securities | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	435	375
Securities lending	1,067	1,099
Equity securities | Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	0	0
Securities lending	0	0
Equity securities | 30 days or more
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	257	43
Securities lending	$ 0	$ 0

Lines of business - Narrative (

Lines of business - Narrative (Details)	3 Months Ended
	Mar. 31, 2017Segment
Segment Reporting Information [Line Items]
Number of principal businesses (segment)	2

Lines of business - Contributio

Lines of business - Contribution of Segments to Overall Profitability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Segment Reporting Information [Line Items]
Fee and other revenue	$ 3,018	$ 2,954	$ 2,970
Net interest revenue (expense)	792	831	766
Provision for credit losses	(5)	7	10
Income from consolidated investment management funds, net of noncontrolling interests	922	870	817
Investment income (loss), net	33	5	(6)
Net income (loss) attributable to noncontrolling interests	15	2	(9)
Investment Management
Segment Reporting Information [Line Items]
Net income (loss) attributable to noncontrolling interests	18	4	(7)
Operating segments
Segment Reporting Information [Line Items]
Fee and other revenue	3,033	2,954	2,971
Net interest revenue (expense)	792	831	766
Total revenue	3,825	3,785	3,737
Provision for credit losses	(5)	7	10
Noninterest expense	2,639	2,628	2,627
Income (loss) before taxes	$ 1,191	$ 1,150	$ 1,100
Pre-tax operating margin	31.00%	30.00%	29.00%
Average assets	$ 336,200	$ 344,142	$ 364,554
Net income (loss) attributable to noncontrolling interests	(3)	(3)	(2)
Operating segments | Investment Management
Segment Reporting Information [Line Items]
Fee and other revenue	877	880	812
Net interest revenue (expense)	86	80	83
Total revenue	963	960	895
Provision for credit losses	3	6	(1)
Noninterest expense	683	694	679
Income (loss) before taxes	$ 277	$ 260	$ 217
Pre-tax operating margin	29.00%	27.00%	24.00%
Average assets	$ 31,067	$ 30,529	$ 29,971
Income from consolidated investment management funds, net of noncontrolling interests	15	1	1
Investment income (loss), net	33	5	(6)
Net income (loss) attributable to noncontrolling interests	18	4	(7)
Operating segments | Investment Services
Segment Reporting Information [Line Items]
Fee and other revenue	2,084	2,032	2,030
Net interest revenue (expense)	707	713	679
Total revenue	2,791	2,745	2,709
Provision for credit losses	0	0	14
Noninterest expense	1,849	1,824	1,808
Income (loss) before taxes	$ 942	$ 921	$ 887
Pre-tax operating margin	34.00%	34.00%	33.00%
Average assets	$ 251,027	$ 269,036	$ 273,289
Operating segments | Other
Segment Reporting Information [Line Items]
Fee and other revenue	72	42	129
Net interest revenue (expense)	(1)	38	4
Total revenue	71	80	133
Provision for credit losses	(8)	1	(3)
Noninterest expense	107	110	140
Income (loss) before taxes	(28)	(31)	(4)
Average assets	$ 54,106	$ 44,577	$ 61,294

Supplemental information to 105

Supplemental information to the Consolidated Statement of Cash Flows- Noncash Investing and Financing Transactions that are Not Reflected in Consolidated Statement of Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Supplemental Cash Flow Information [Abstract]
Transfers from loans to other assets for other real estate owned (“OREO”)	$ 1	$ 1
Change in assets of consolidated VIEs	204	101
Change in liabilities of consolidated VIEs	106	8
Change in nonredeemable noncontrolling interests of consolidated investment management funds	84	81
Securities purchased not settled	580	86
Securities sales not settled	81	356
Premises and equipment/capitalized software funded by capital lease obligations	$ 1	$ 2