The Bank of New York Mellon Corporation (BK) 10-Q 3 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2018shares
Documentand Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
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 Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding (shares)	999,944,587

Consolidated Income Statement (

Consolidated Income Statement (unaudited) - USD ($) shares in Thousands, $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investment services fees:
Asset servicing		$ 1,157	$ 1,168	$ 1,085	$ 2,325	$ 2,148
Clearing services		392	414	394	806	770
Issuer services		266	260	241	526	492
Treasury services		140	138	140	278	279
Total investment services fees		1,955	1,980	1,860	3,935	3,689
Investment management and performance fees		910	960	879	1,870	1,721
Foreign exchange and other trading revenue		187	209	165	396	329
Financing-related fees		53	52	53	105	108
Distribution and servicing		34	36	41	70	82
Investment and other income		70	82	122	152	199
Total fee revenue		3,209	3,319	3,120	6,528	6,128
Net securities gains (losses) — including other-than-temporary impairment		1	(49)	0	(48)	10
Noncredit-related portion of other-than-temporary impairment (recognized in other comprehensive income)		0	0	0	0	0
Net securities gains (losses)		1	(49)	0	(48)	10
Total fee and other revenue		3,210	3,270	3,120	6,480	6,138
Operations of consolidated investment management funds
Investment income (loss)		13	(11)	10	2	47
Interest of investment management fund note holders		1	0	0	1	4
Income (loss) from consolidated investment management funds		12	(11)	10	1	43
Net interest revenue
Interest revenue		1,553	1,381	1,052	2,934	2,012
Interest expense		637	462	226	1,099	394
Net interest revenue		916	919	826	1,835	1,618
Total revenue		4,138	4,178	3,956	8,316	7,799
Provision for credit losses		(3)	(5)	(7)	(8)	(12)
Noninterest expense
Staff	[1]	1,489	1,576	1,432	3,065	2,920
Professional, legal and other purchased services		328	291	319	619	632
Software		192	173	173	365	339
Net occupancy		156	139	140	295	276
Sub-custodian and clearing	[2]	110	119	108	229	211
Distribution and servicing		106	106	104	212	204
Furniture and equipment		74	61	59	135	116
Business development		62	51	63	113	114
Bank assessment charges		47	52	59	99	116
Amortization of intangible assets		48	49	53	97	105
Other	[1],[2],[3]	135	122	145	257	264
Total noninterest expense		2,747	2,739	2,655	5,486	5,297
Income
Income before income taxes		1,394	1,444	1,308	2,838	2,514
Provision for income taxes		286	282	332	568	601
Net income		1,108	1,162	976	2,270	1,913
Net (income) loss attributable to noncontrolling interests (includes $(7), $11, $(3), $4 and $(21) related to consolidated investment management funds, respectively)		(5)	9	(1)	4	(16)
Net income applicable to shareholders of The Bank of New York Mellon Corporation		1,103	1,171	975	2,274	1,897
Preferred stock dividends		(48)	(36)	(49)	(84)	(91)
Net income applicable to common shareholders of The Bank of New York Mellon Corporation		1,055	1,135	926	2,190	1,806
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		1,055	1,135	926	2,190	1,806
Less: Earnings allocated to participating securities		7	8	13	15	27
Net income applicable to common shareholders of The Bank of New York Mellon Corporation after required adjustment for the calculation of basic and diluted earnings per common share		$ 1,048	$ 1,127	$ 913	$ 2,175	$ 1,779
Average common shares and equivalents outstanding of The Bank of New York Mellon Corporation
Basic (shares)		1,010,179	1,016,797	1,035,829	1,013,507	1,038,479
Common stock equivalents (shares)		6,451	8,188	15,598	7,277	16,710
Less: Participating securities (shares)		(2,273)	(3,254)	(9,548)	(2,764)	(10,380)
Diluted (shares)		1,014,357	1,021,731	1,041,879	1,018,020	1,044,809
Anti-dilutive securities (in shares)	[4]	7,208	7,248	16,256	7,203	16,756
Earnings per share applicable to the common shareholders of The Bank of New York Mellon Corporation
Basic (usd per share)	[5]	$ 1.04	$ 1.11	$ 0.88	$ 2.15	$ 1.71
Diluted (usd per share)	[5]	$ 1.03	$ 1.10	$ 0.88	$ 2.14	$ 1.70
[1]	In the first quarter of 2018, we adopted new accounting guidance included in ASU 2017-07, Compensation-Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, which required the reclassification of the components of pension and other postretirement costs, other than the service cost component. As a result, staff expense increased and other expense decreased. Prior periods have been reclassified. See Note 2 of the Notes to Consolidated Financial Statements for additional information.
[2]	Beginning in the first quarter of 2018, clearing expense, which was previously included in other expense, was included with sub-custodian expense. Prior periods have been reclassified.
[3]	Beginning in the first quarter of 2018, M&I, litigation and restructuring charges are no longer separately disclosed. Expenses previously reported in this line have been reclassified to existing expense categories, primarily other expense.
[4]	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.
[5]	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			6 Months Ended		12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Net (income) loss attributable to noncontrolling interests	$ (5)	$ 9	$ (1)	$ 4	$ (16)
Investment Management
Net (income) loss attributable to noncontrolling interests	$ (7)	$ 11	$ (3)	$ 4		$ (21)

Consolidated Comprehensive Inco

Consolidated Comprehensive Income Statement (unaudited) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income		$ 1,108	$ 1,162	$ 976	$ 2,270	$ 1,913
Other comprehensive income, net of tax:
Foreign currency translation adjustments		(400)	244	330	(156)	455
Unrealized (loss) gain on assets available-for-sale:
Unrealized (loss) gain arising during the period		(64)	(275)	91	(339)	185
Reclassification adjustment		0	37	(1)	37	(7)
Total unrealized (loss) gain on assets available-for-sale		(64)	(238)	90	(302)	178
Defined benefit plans:
Net gain arising during the period		0	0	0	0	2
Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost		16	17	16	33	34
Total defined benefit plans		16	17	16	33	36
Net unrealized (loss) gain on cash flow hedges		(14)	(2)	1	(16)	11
Total other comprehensive income (loss), net of tax	[1]	(462)	21	437	(441)	680
Total comprehensive income		646	1,183	1,413	1,829	2,593
Net (income) loss attributable to noncontrolling interests		(5)	9	(1)	4	(16)
Other comprehensive loss (income) attributable to noncontrolling interests		10	(5)	(6)	5	(8)
Comprehensive income applicable to shareholders of The Bank of New York Mellon Corporation		$ 651	$ 1,187	$ 1,406	$ 1,838	$ 2,569
[1]	Other comprehensive income (loss) attributable to The Bank of New York Mellon Corporation shareholders was $(452) million for the quarter ended June 30, 2018, $16 million for the quarter ended March 31, 2018, $431 million for the quarter ended June 30, 2017, $(436) million for the six months ended June 30, 2018 and $672 million for the six months ended June 30, 2017.

Consolidated Comprehensive Inc5

Consolidated Comprehensive Income Statement (unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Other comprehensive (loss)	$ (452)	$ 16	$ 431	$ (436)	$ 672

Consolidated Balance Sheet (una

Consolidated Balance Sheet (unaudited) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Securities:
Held-to-maturity (fair value of $34,188 and $40,512)		$ 35,141
Loans		57,776	$ 61,540
Allowance for loan losses		(145)
Goodwill		17,418	17,564
Intangible assets		3,308	3,411
Other assets (includes $843 and $791, at fair value)		22,507	23,029
Total assets		352,928	371,758
Deposits:
Accrued taxes and other expenses			6,225
Other liabilities (including allowance for lending-related commitments of $109 and $102, also includes $75 and $800, at fair value)			6,050
Total liabilities		311,182	330,012
Temporary equity
Redeemable noncontrolling interests		189	179
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 1,363,777,643 and 1,354,163,581 shares		14	14
Additional paid-in capital		26,981	26,665
Retained earnings		27,306	25,635
Accumulated other comprehensive loss, net of tax		(2,795)	(2,357)
Less: Treasury stock of 363,833,056 and 340,721,136 common shares, at cost		(13,543)	(12,248)
Total The Bank of New York Mellon Corporation shareholders’ equity		41,505	41,251
Nonredeemable noncontrolling interests of consolidated investment management funds		52	316
Total permanent equity	[1]	41,557	41,567
Total liabilities, temporary equity and permanent equity		352,928	371,758
Investment Management funds
Securities:
Trading assets		175	516
Assets of consolidated investment management funds, at fair value		428	731
Deposits:
Liabilities of consolidated investment management funds, at fair value		3	2
Operating segments
Cash and due from:
Banks		5,361	5,382
Interest-bearing deposits with the Federal Reserve and other central banks		75,116	91,510
Interest-bearing deposits with banks ($1,659 and $1,751 is restricted)		16,134	11,979
Federal funds sold and securities purchased under resale agreements		26,494	28,135
Securities:
Held-to-maturity (fair value of $34,188 and $40,512)		35,141	40,827
Available-for-sale		83,940	79,543
Total securities		119,081	120,370
Trading assets		7,035	6,022
Loans		57,776	61,540
Allowance for loan losses		(145)	(159)
Net loans		57,631	61,381
Premises and equipment		1,752	1,634
Accrued interest receivable		663	610
Goodwill		17,418	17,564
Intangible assets		3,308	3,411
Other assets (includes $843 and $791, at fair value)		22,507	23,029
Total assets		352,500	371,027
Deposits:
Noninterest-bearing (principally U.S. offices)		75,463	82,716
Interest-bearing deposits in U.S. offices		57,054	52,294
Interest-bearing deposits in non-U.S. offices		98,043	109,312
Total deposits		230,560	244,322
Federal funds purchased and securities sold under repurchase agreements		13,200	15,163
Trading liabilities		3,580	3,984
Payables to customers and broker-dealers		19,123	20,184
Commercial paper		2,508	3,075
Other borrowed funds		3,053	3,028
Accrued taxes and other expenses		5,452	6,225
Other liabilities (including allowance for lending-related commitments of $109 and $102, also includes $75 and $800, at fair value)		5,443	6,050
Long-term debt (includes $363 and $367, at fair value)		28,260	27,979
Total liabilities		311,179	330,010
Operating segments | Investment Management funds
Securities:
Assets of consolidated investment management funds, at fair value		428	731
Deposits:
Liabilities of consolidated investment management funds, at fair value		$ 3	$ 2
[1]	Includes total The Bank of New York Mellon Corporation common shareholders’ equity of $37,709 million at Dec. 31, 2017 and $37,963 million at June 30, 2018.

Consolidated Balance Sheet (un

Consolidated Balance Sheet (unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, authorized (shares)	3,500,000,000	3,500,000,000
Common stock, issued (shares)	1,363,777,643	1,354,163,581
Treasury stock, common shares (shares)	363,833,056	340,721,136
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
Restricted cash	$ 1,659	$ 1,751
Other liabilities, allowance for lending related commitments	109	102
Long-term debt, fair value	363	367
Operating segments
Held-to-maturity, fair value	34,188	40,512
Other assets, fair value	843	791
Other liabilities, allowance for lending related commitments	109	102
Other liabilities, fair value	75	800
Long-term debt, fair value	$ 363	$ 367

Consolidated Statement of Cash

Consolidated Statement of Cash Flows (unaudited) - USD ($) $ in Millions		3 Months Ended			6 Months Ended		12 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net income		$ 1,108	$ 1,162	$ 976	$ 2,270	$ 1,913
Net loss (income) attributable to noncontrolling interests		(5)	9	(1)	4	(16)
Net income applicable to shareholders of The Bank of New York Mellon Corporation		1,103	1,171	975	2,274	1,897
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Provision for credit losses		(3)	(5)	(7)	(8)	(12)
Pension plan contributions					(19)	(8)
Depreciation and amortization					677	693
Deferred tax (benefit) expense					(230)	124
Net securities losses (gains)		(1)	49	0	48	(10)
Change in trading assets and liabilities					(462)	167
Change in accruals and other, net	[1]				(712)	(4,687)
Net cash provided by (used for) operating activities	[1]				1,568	(1,836)
Investing activities
Change in interest-bearing deposits with banks	[1]				(4,592)	1,740
Change in interest-bearing deposits with the Federal Reserve and other central banks					15,583	(13,836)
Purchases of securities held-to-maturity					(2,944)	(4,494)
Paydowns of securities held-to-maturity					2,099	2,146
Maturities of securities held-to-maturity					5,535	2,825
Purchases of securities available-for-sale					(17,550)	(13,569)
Sales of securities available-for-sale					4,867	2,093
Paydowns of securities available-for-sale					3,871	4,679
Maturities of securities available-for-sale					3,767	3,842
Net change in loans					3,699	2,653
Sales of loans and other real estate					6	364
Change in federal funds sold and securities purchased under resale agreements	[1]				1,638	(1,639)
Net change in seed capital investments					15	(23)
Purchases of premises and equipment/capitalized software					(505)	(722)
Dispositions, net of cash					84	0
Other, net	[1]				(359)	273
Net cash provided by (used for) investing activities	[1]				15,214	(13,668)
Financing activities
Change in deposits					(12,270)	10,812
Change in federal funds purchased and securities sold under repurchase agreements					(1,963)	945
Change in payables to customers and broker-dealers					(1,051)	626
Change in other borrowed funds					(5)	196
Change in commercial paper					(567)	876
Net proceeds from the issuance of long-term debt					2,991	3,990
Repayments of long-term debt					(2,200)	(796)
Proceeds from the exercise of stock options					70	256
Issuance of common stock					20	14
Treasury stock acquired					(1,295)	(1,385)
Common cash dividends paid					(491)	(400)
Preferred cash dividends paid					(84)	(91)
Other, net					10	30
Net cash (used for) provided by financing activities					(16,835)	15,073
Effect of exchange rate changes on cash					(60)	113
Change in cash and due from banks and restricted cash
Change in cash and due from banks and restricted cash	[1]				(113)	(318)
Cash and due from banks and restricted cash at beginning of period	[1]		7,133		7,133	8,204	$ 8,204
Cash and due from banks and restricted cash at end of period	[1]	7,020		7,886	7,020	7,886	7,133
Cash and due from banks at end of period (unrestricted cash)	[1]							$ 5,361	$ 4,725
Restricted cash at end of period	[1]							1,659	3,161
Cash and due from banks and restricted cash at end of period	[1]	$ 7,020	$ 7,133	$ 7,886	7,133	8,204	$ 8,204	$ 7,020	$ 7,886
Supplemental disclosures
Interest paid					1,046	385
Income taxes paid					436	220
Income taxes refunded					$ 57	$ 2
[1]	Reflects the impact of adopting new accounting guidance included in ASU 2016-15 and ASU 2016-18. Prior periods have been restated. See Note 2 of the Notes to Consolidated Financial Statements for additional information.

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity (unaudited) - USD ($) $ in Millions	Total		Preferred stock	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive (loss), net of tax	Treasury stock	Non- redeemable noncontrolling interests of consolidated investment management funds	Redeemable non- controlling interests/ temporary equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment for the cumulative affect of applying the ASU | ASU 2014-09	$ (55)					$ (55)
Adjustment for the cumulative affect of applying the ASU | ASU 2017-12	25					27	$ (2)
Adjusted balance	41,537		$ 3,542	$ 14	$ 26,665	25,607	(2,359)	$ (12,248)	$ 316	$ 179
Common stock issued under:
The Bank of New York Mellon Corporation shareholders’ equity	41,251			37,709
Beginning Balance at Dec. 31, 2017	41,567	[1]	3,542	14	26,665	25,635	(2,357)	(12,248)	316	179
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued to shareholders of noncontrolling interests										34
Redemption of subsidiary shares from noncontrolling interests										(32)
Other net changes in noncontrolling interests	(273)				(13)				(260)	13
Net income (loss)	2,270					2,274			(4)	0
Other comprehensive (loss)	(436)						(436)			(5)
Other comprehensive (loss) including portion attributable to noncontrolling interest	(436)
Dividends:
Common stock at $0.48 per share	(491)					(491)
Preferred stock	(84)					(84)
Repurchase of common stock	(1,295)							(1,295)
Common stock issued under:
Employee benefit plans	17				17
Direct stock purchase and dividend reinvestment plan	16				16
Stock awards and options exercised	296			0	296
Ending Balance at Jun. 30, 2018	41,557	[1]	$ 3,542	14	$ 26,981	$ 27,306	$ (2,795)	$ (13,543)	$ 52	$ 189
Common stock issued under:
The Bank of New York Mellon Corporation shareholders’ equity	$ 41,505			$ 37,963
[1]	Includes total The Bank of New York Mellon Corporation common shareholders’ equity of $37,709 million at Dec. 31, 2017 and $37,963 million at June 30, 2018.

Consolidated Statement of Cha10

Consolidated Statement of Changes in Equity (unaudited) (Parenthetical) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)$ / shares
The Bank of New York Mellon Corporation shareholders’ equity	$ 41,505
Dividends on common stock, cash paid (usd per share) | $ / shares	$ 0.48
Common stock
The Bank of New York Mellon Corporation shareholders’ equity	$ 37,963

Basis of presentation

Basis of presentation	6 Months Ended
	Jun. 30, 2018
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, 2017 . 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 allowance for loan losses and lending-related commitments, 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 securities, goodwill and intangible assets and establishment of allowances for loan losses and lending-related commitments as well as changes in pension and postretirement expense.

Accounting changes and new acco

Accounting changes and new accounting guidance	6 Months Ended
	Jun. 30, 2018
Accounting Changes and Error Corrections [Abstract]
Accounting changes and new accounting guidance	Accounting changes and new accounting guidance The following accounting changes and new accounting guidance were adopted in the first quarter of 2018. ASU 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities In August 2017, the FASB issued an ASU, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities . The objective of this ASU is to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities and to simplify the application of hedge accounting guidance. The most significant impact of the new guidance to the Company relates to the new accounting alternatives for fair value hedges of interest rate risk, specifically, the ability to hedge only the benchmark component of the contractual cash flows and partial-term hedging. The guidance also changed presentation and disclosure requirements and made changes to how the shortcut method is applied, which resulted in the Company using that method going forward for certain hedging relationships. BNY Mellon elected to early adopt this ASU on Jan. 31, 2018, which is the “as of” date for which the Company was permitted to make certain elections and the measurement date for recording the adoption impact for certain hedge modifications. As part of the adoption, we elected to reclassify approximately $1.1 billion of debt securities from held-to-maturity to available-for-sale which resulted in a decrease of $47 million pre-tax to accumulated other comprehensive income. The Company also elected to modify certain hedge relationships as of the adoption date primarily to utilize the benchmark component method of measuring hedge effectiveness, as such method is deemed to more closely match risk management objectives with accounting results. The Company recognized a $27 million after-tax increase in retained earnings as of Jan. 1, 2018 associated with the adoption impact of these hedge modifications. ASU 2017-07, Compensation-Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost In March 2017, the FASB issued an ASU, Compensation-Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost . The ASU requires the disaggregation of the service cost component from the other components of the net benefit cost in the income statement. The ASU also permits only the service cost component of net benefit cost to be eligible for capitalization. BNY Mellon adopted this ASU in the first quarter of 2018, and applied the guidance retrospectively for the presentation of the service cost component and the other components in the income statement, and prospectively for the capitalization of the service cost component in assets. The adoption of this standard increased staff expense and decreased other expense by $16 million for the second quarter of 2017 and $32 million for the first six months of 2017. ASU 2016-18, Statement of Cash Flows: Restricted Cash In November 2016, the FASB issued an ASU, Statement of Cash Flows: Restricted Cash . This ASU provides guidance on the presentation of restricted cash or restricted cash equivalents in the statement of cash flows. Restricted cash consists of excess client funds held by our broker-dealer business and totaled $1.7 billion at June 30, 2018 and $3.2 billion at June 30, 2017. Restricted cash is included in interest-bearing deposits with banks on the consolidated balance sheet and with cash and due from banks when reconciling the beginning and end-of-period balances on the consolidated cash flow statement. We adopted the guidance in this ASU retrospectively. As a result, the change in interest-bearing deposits with banks, which is included in investing activities on the consolidated statement of cash flows, was restated to reflect the decrease in restricted cash of $221 million for the six months ended June 30, 2017. The change in restricted cash was a $92 million decrease for the six months ended June 30, 2018. ASU 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments In August 2016, the FASB issued an ASU, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments . This ASU provides guidance on eight specific cash flow presentation issues. The most significant impact for BNY Mellon relates to distributions received from equity method investees. For equity method investments, BNY Mellon elected to report distributions received from equity method investees using the cumulative earnings approach. Distributions received are considered returns on investment and classified as cash inflows from operating activities on the consolidated cash flows statement. To the extent the returns on investment exceeded the cumulative equity in earnings recognized, the excess would be considered a return of investment and classified as cash inflows from investing activities on the consolidated cash flows statement. We adopted the guidance in this ASU retrospectively. As a result, the change in accruals and other, net, which is included in operating activities on the consolidated cash flows statement, was restated to reflect distributions received of $19 million for the six months ended June 30, 2017 . These distributions were previously included in other, net in investing activities on the consolidated cash flows statement. Distributions received for the six months ended June 30, 2018 were $19 million . The remaining seven specific cash flow presentation issues do not materially impact BNY Mellon. ASU 2014-09, Revenue from Contracts with Customers In May 2014, the FASB issued an ASU, Revenue from Contracts with Customers . This ASU, as amended, provides guidance on the recognition of revenue related to the transfer of promised goods or services to customers and guidance on accounting for certain contract costs. The standard provides a single revenue model to be applied by reporting companies under U.S. GAAP and supersedes most existing revenue recognition guidance. The Company adopted the guidance on Jan. 1, 2018 using the cumulative effect transition method applied to contracts not completed as of Dec. 31, 2017, which resulted in a $55 million after-tax reduction to retained earnings. The comparative financial information for 2017 has not been restated and continues to be reported under the accounting standards in effect for that period. Although the impact of the adoption of this ASU was not material, the most significant changes and quantitative impact of the changes are disclosed below. Payments to customers The timing of recognizing the reduction in revenue for certain payments made to depositary receipts customers has changed. Prior to adoption, annual payments to customers were capitalized and amortized as contra revenue over the remaining contract period, subject to impairment reviews. Under the new guidance, annual payments are recorded as a reduction in revenue in proportion to the expected annual revenue generated from the related customer contract. Costs to obtain a customer contract Prior to adoption, costs to obtain a customer contract, primarily sales incentives, were expensed as incurred. Under the new guidance, an asset is recognized for the incremental sales incentives that are considered costs of obtaining a contract with a customer, if those costs are expected to be recovered. The table below presents the cumulative effect of the adoption of the new guidance on the consolidated balance sheet as of Dec. 31, 2017 . Impact on the consolidated balance sheet Dec. 31, 2017 Impact of adoption Jan. 1, 2018 (in millions) Assets Other assets $ 23,029 $ (9 ) $ 23,020 Liabilities Accrued tax and other expenses $ 6,225 $ (18 ) $ 6,207 Other liabilities 6,050 64 6,114 Equity Retained earnings $ 25,635 $ (55 ) $ 25,580 The impact of the new guidance on the consolidated income statement for the second quarter of 2018 and the first six months of 2018, and consolidated balance sheet as of June 30, 2018 , was de minimis. See Note 8 for additional revenue and contract costs disclosures. ASU 2016-01, Financial Instruments—Overall: Recognition and Measurement of Financial Assets and Financial Liabilities In January 2016, the FASB issued an ASU, Financial Instruments—Overall: Recognition and Measurement of Financial Assets and Financial Liabilities . The ASU requires investments in equity securities that do not result in consolidation and are not accounted for under the equity method to be measured at fair value with changes in the fair value recognized through net income, unless one of two available exceptions applies. The first exception, a scope exception, allows Federal Reserve Bank stock, FHLB stock and exchange memberships to remain accounted for at cost, less impairment. The second practicability exception is an election available for equity investments that do not have readily determinable fair values. For certain investments where the Company has chosen the practicability exception, such investments are accounted for at cost adjusted for impairment, if any, plus or minus observable price changes. The Company adopted this guidance in the first quarter of 2018 using the cumulative effect method of adoption, with a de minimis impact to retained earnings. As part of the adoption, we reclassified money market fund investments of approximately $1 billion to trading assets, primarily from available-for-sale securities. We have non-readily marketable equity securities where we are utilizing the practicability exception of $53 million at June 30, 2018 and $47 million at March 31, 2018. We recognized upward adjustments on these securities of $5 million in the second quarter of 2018 and $20 million in the first quarter of 2018. Both upward adjustments were driven by activity that resulted in observable price changes.

Acquisitions and dispositions

Acquisitions and dispositions	6 Months Ended
	Jun. 30, 2018
Business Combinations [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 second quarter of 2018 or the first six months of 2018 . A t June 30, 2018 , we are potentially obligated to pay additional consideration which, using reasonable assumptions, could range from $0 million to $7 million over the next two years , but could be higher as certain of the arrangements do not contain a contractual maximum. The transactions described below did not have a material impact on BNY Mellon’s results of operations. On Jan. 2, 2018, BNY Mellon completed the sale of CenterSquare, one of our Investment Management boutiques, and recorded a gain on this transaction. CenterSquare had approximately $10 billion in AUM in U.S. and global real estate and infrastructure investments. In addition, goodwill of $52 million was removed from the balance sheet as a result of this sale. On June 29, 2018, BNY Mellon completed the exchange of its majority equity interest in Amherst Capital Management LLC for a minority equity stake in Amherst Holdings LLC. Goodwill of $13 million was removed from the balance sheet and a gain was recorded as a result of this sale.

Securities

Securities	6 Months Ended
	Jun. 30, 2018
Securities [Abstract]
Securities	Securities The following tables present the amortized cost, the gross unrealized gains and losses and the fair value of securities at June 30, 2018 and Dec. 31, 2017 , respectively. Securities at June 30, 2018 Gross unrealized Amortized cost Fair value (in millions) Gains Losses Available-for-sale: U.S. Treasury $ 19,063 $ 99 $ 307 $ 18,855 U.S. government agencies 1,481 — 34 1,447 State and political subdivisions 2,636 23 29 2,630 Agency RMBS 25,159 89 445 24,803 Non-agency RMBS (a) 1,229 285 7 1,507 Non-agency commercial MBS 1,403 1 26 1,378 Agency commercial MBS 9,775 11 220 9,566 CLOs 3,179 4 6 3,177 Foreign covered bonds 2,898 13 18 2,893 Corporate bonds 1,167 9 30 1,146 Sovereign debt/sovereign guaranteed 11,986 136 36 12,086 Other debt securities 4,470 5 23 4,452 Total securities available-for-sale (b) $ 84,446 $ 675 $ 1,181 $ 83,940 Held-to-maturity: U.S. Treasury $ 5,043 $ 2 $ 116 $ 4,929 U.S. government agencies 1,803 — 17 1,786 State and political subdivisions 17 — 1 16 Agency RMBS 25,747 10 818 24,939 Non-agency RMBS 111 4 1 114 Agency commercial MBS 1,321 — 46 1,275 Foreign covered bonds 82 1 — 83 Sovereign debt/sovereign guaranteed 990 29 — 1,019 Other debt securities 27 — — 27 Total securities held-to-maturity $ 35,141 $ 46 $ 999 $ 34,188 Total securities $ 119,587 $ 721 $ 2,180 $ 118,128 (a) Includes $943 million that were included in the former Grantor Trust. (b) Includes gross unrealized gains of $44 million and gross unrealized losses of $100 million recorded in accumulated other comprehensive income related to 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, 2017 Gross unrealized Amortized cost Fair value (in millions) Gains Losses Available-for-sale: U.S. Treasury $ 15,159 $ 264 $ 160 $ 15,263 U.S. government agencies 917 1 10 908 State and political subdivisions 2,949 31 23 2,957 Agency RMBS 24,002 108 291 23,819 Non-agency RMBS (a) 1,265 317 4 1,578 Other RMBS 152 3 6 149 Non-agency commercial MBS 1,360 6 6 1,360 Agency commercial MBS 8,793 36 67 8,762 CLOs 2,898 12 1 2,909 Other asset-backed securities 1,040 3 — 1,043 Foreign covered bonds 2,520 18 9 2,529 Corporate bonds 1,249 17 11 1,255 Sovereign debt/sovereign guaranteed 12,405 175 23 12,557 Other debt securities 3,494 9 12 3,491 Money market funds 963 — — 963 Total securities available-for-sale (b) $ 79,166 $ 1,000 $ 623 $ 79,543 Held-to-maturity: U.S. Treasury $ 9,792 $ 6 $ 56 $ 9,742 U.S. government agencies 1,653 — 12 1,641 State and political subdivisions 17 — 1 16 Agency RMBS 26,208 51 332 25,927 Non-agency RMBS 57 5 — 62 Other RMBS 65 — 1 64 Non-agency commercial MBS 6 — — 6 Agency commercial MBS 1,324 2 9 1,317 Foreign covered bonds 84 2 — 86 Sovereign debt/sovereign guaranteed 1,593 30 — 1,623 Other debt securities 28 — — 28 Total securities held-to-maturity $ 40,827 $ 96 $ 411 $ 40,512 Total securities $ 119,993 $ 1,096 $ 1,034 $ 120,055 (a) Includes $1,091 million that were included in the former Grantor Trust. (b) Includes gross unrealized gains of $50 million and gross unrealized losses of $144 million recorded in accumulated other comprehensive income related to 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 realized gains, losses and impairments, on a gross basis. Net securities gains (losses) (in millions) 2Q18 1Q18 2Q17 YTD18 YTD17 Realized gross gains $ 2 $ 2 $ 3 $ 4 $ 14 Realized gross losses (1 ) (51 ) (2 ) (52 ) (2 ) Recognized gross impairments — — (1 ) — (2 ) Total net securities gains (losses) $ 1 $ (49 ) $ — $ (48 ) $ 10 In the first quarter of 2018, we adopted the new accounting guidance included in ASU 2016-01, Financial Instruments—Overall: Recognition and Measurement of Financial Assets and Financial Liabilities . As a result, money market fund investments were reclassified to trading assets, primarily from available-for-sale securities. In the first quarter of 2018, certain debt securities with an aggregate amortized cost of $1,117 million and fair value of $1,070 million were transferred from held-to-maturity securities to available-for-sale securities as part of the adoption of ASU 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities . Temporarily impaired securities At June 30, 2018 , the unrealized losses on the 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, $100 million of the unrealized losses at June 30, 2018 and $144 million at Dec. 31, 2017 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 fair value of securities 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 June 30, 2018 and Dec. 31, 2017 , respectively. Temporarily impaired securities at June 30, 2018 Less than 12 months 12 months or more Total Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses (in millions) Available-for-sale: U.S. Treasury $ 10,447 $ 140 $ 3,550 $ 167 $ 13,997 $ 307 U.S. government agencies 1,140 29 119 5 1,259 34 State and political subdivisions 488 6 470 23 958 29 Agency RMBS 10,909 209 4,821 236 15,730 445 Non-agency RMBS (a) 96 3 156 4 252 7 Non-agency commercial MBS 955 21 115 5 1,070 26 Agency commercial MBS 5,541 159 1,062 61 6,603 220 CLOs 1,292 6 45 — 1,337 6 Foreign covered bonds 1,197 12 281 6 1,478 18 Corporate bonds 707 28 49 2 756 30 Sovereign debt/sovereign guaranteed 2,647 23 626 13 3,273 36 Other debt securities 2,519 15 409 8 2,928 23 Total securities available-for-sale (b) $ 37,938 $ 651 $ 11,703 $ 530 $ 49,641 $ 1,181 Held-to-maturity: U.S. Treasury $ 3,591 $ 80 $ 1,136 $ 36 $ 4,727 $ 116 U.S. government agencies 554 10 856 7 1,410 17 State and political subdivisions — — 4 1 4 1 Agency RMBS 14,697 428 8,805 390 23,502 818 Non-agency RMBS 36 — 24 1 60 1 Agency commercial MBS 1,217 42 57 4 1,274 46 Total securities held-to-maturity $ 20,095 $ 560 $ 10,882 $ 439 $ 30,977 $ 999 Total temporarily impaired securities $ 58,033 $ 1,211 $ 22,585 $ 969 $ 80,618 $ 2,180 (a) Includes $15 million with an unrealized loss of $1 million for less than 12 months and $5 million with an unrealized loss of less than $1 million for 12 months or more that were included in the former Grantor Trust. (b) Includes gross unrealized losses of $100 million for 12 months or more recorded in accumulated other comprehensive income related to 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, 2017 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 $ 7,429 $ 131 $ 2,175 $ 29 $ 9,604 $ 160 U.S. government agencies 588 6 160 4 748 10 State and political subdivisions 732 3 518 20 1,250 23 Agency RMBS 8,567 66 5,834 225 14,401 291 Non-agency RMBS (a) 20 — 149 4 169 4 Other RMBS 71 4 45 2 116 6 Non-agency commercial MBS 476 3 122 3 598 6 Agency commercial MBS 3,077 28 1,332 39 4,409 67 CLOs 260 1 — — 260 1 Foreign covered bonds 953 7 116 2 1,069 9 Corporate bonds 274 2 288 9 562 11 Sovereign debt/sovereign guaranteed 1,880 12 559 11 2,439 23 Other debt securities 1,855 7 368 5 2,223 12 Total securities available-for-sale (b) $ 26,182 $ 270 $ 11,666 $ 353 $ 37,848 $ 623 Held-to-maturity: U.S. Treasury $ 6,389 $ 41 $ 2,909 $ 15 $ 9,298 $ 56 U.S. government agencies 791 4 850 8 1,641 12 State and political subdivisions — — 4 1 4 1 Agency RMBS 9,458 81 12,305 251 21,763 332 Other RMBS — — 50 1 50 1 Agency commercial MBS 737 7 60 2 797 9 Total securities held-to-maturity $ 17,375 $ 133 $ 16,178 $ 278 $ 33,553 $ 411 Total temporarily impaired securities $ 43,557 $ 403 $ 27,844 $ 631 $ 71,401 $ 1,034 (a) Includes $7 million with an unrealized loss of less than $1 million for less than 12 months and $12 million with an unrealized loss of $1 million for 12 months or more that were included in the former Grantor Trust. (b) Includes gross unrealized losses of $144 million for 12 months or more recorded in accumulated other comprehensive income related to 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 securities portfolio. Maturity distribution and yields on securities at June 30, 2018 U.S. Treasury U.S. government agencies State and political subdivisions Other bonds, notes and debentures Mortgage/ asset-backed (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 $ 6,518 1.82 % $ 40 2.17 % $ 438 2.14 % $ 5,444 1.22 % $ — — % $ 12,440 Over 1 through 5 years 6,395 1.97 454 2.18 1,352 2.94 12,364 1.17 — — 20,565 Over 5 through 10 years 2,556 2.21 953 2.72 645 2.67 2,322 0.84 — — 6,476 Over 10 years 3,386 3.11 — — 195 2.87 192 1.66 — — 3,773 Mortgage-backed securities — — — — — — — — 37,254 3.11 37,254 Asset-backed securities — — — — — — — — 3,432 3.03 3,432 Total $ 18,855 2.16 % $ 1,447 2.53 % $ 2,630 2.74 % $ 20,322 1.18 % $ 40,686 3.11 % $ 83,940 Securities held-to-maturity: One year or less $ 577 1.18 % $ 631 1.18 % $ — — % $ 136 0.83 % $ — — % $ 1,344 Over 1 through 5 years 3,807 1.81 1,172 2.23 2 5.66 442 0.46 — — 5,423 Over 5 through 10 years 659 1.78 — — 1 5.78 521 0.85 — — 1,181 Over 10 years — — — — 14 4.76 — — — — 14 Mortgage-backed securities — — — — — — — — 27,179 2.85 27,179 Total $ 5,043 1.74 % $ 1,803 1.86 % $ 17 4.94 % $ 1,099 0.69 % $ 27,179 2.85 % $ 35,141 (a) Yields are based upon the amortized cost of securities. Other-than-temporary impairment We 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 and 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 securities portfolio in 2009, at June 30, 2018 and Dec. 31, 2017 . See Note 15 for carrying values of these securities. Projected weighted-average default rates and loss severities June 30, 2018 Dec. 31, 2017 Default rate Severity Default rate Severity Alt-A 21 % 52 % 22 % 53 % Subprime 36 % 65 % 38 % 66 % Prime 12 % 40 % 13 % 39 % The following table presents pre-tax net securities gains (losses) by type. Net securities gains (losses) (in millions) 2Q18 1Q18 2Q17 YTD18 YTD17 Agency RMBS $ — $ (42 ) $ — $ (42 ) $ 1 U.S. Treasury — (4 ) (1 ) (4 ) (1 ) Non-agency RMBS — — — — (1 ) Other 1 (3 ) 1 (2 ) 11 Total net securities gains (losses) $ 1 $ (49 ) $ — $ (48 ) $ 10 The following tables reflect 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) 2Q18 2Q17 Beginning balance as of March 31 $ 80 $ 89 Add: Initial OTTI credit losses — — Subsequent OTTI credit losses — 1 Less: Realized losses for securities sold 1 5 Ending balance as of June 30 $ 79 $ 85 Debt securities credit loss roll forward (in millions) YTD18 YTD17 Beginning balance as of Dec. 31 $ 84 $ 88 Add: Initial OTTI credit losses — — Subsequent OTTI credit losses — 2 Less: Realized losses for securities sold 5 5 Ending balance as of June 30 $ 79 $ 85 Pledged assets At June 30, 2018 , BNY Mellon had pledged assets of $112 billion , including $92 billion pledged as collateral for potential borrowings at the Federal Reserve Discount Window and $6 billion pledged as collateral for borrowing at the Federal Home Loan Bank. The components of the assets pledged at June 30, 2018 included $95 billion of securities, $13 billion of loans, $3 billion of trading assets and $1 billion of interest-bearing deposits with banks. 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, 2017 , BNY Mellon had pledged assets of $111 billion , including $92 billion pledged as collateral for potential borrowing at the Federal Reserve Discount Window and $5 billion pledged as collateral for borrowing at the Federal Home Loan Bank. The components of the assets pledged at Dec. 31, 2017 included $96 billion of securities, $13 billion of loans and $2 billion of trading assets. At June 30, 2018 and Dec. 31, 2017 , pledged assets included $11 billion and $10 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 June 30, 2018 and Dec. 31, 2017 , the market value of the securities received that can be sold or repledged was $94 billion and $86 billion , respectively. We routinely sell or repledge these securities through delivery to third parties. As of June 30, 2018 and Dec. 31, 2017 , the market value of securities collateral sold or repledged was $62 billion and $49 billion , respectively. Restricted cash and securities Cash and securities may be segregated under federal and other regulations or requirements. At June 30, 2018 and Dec. 31, 2017 , cash segregated under federal and other regulations or requirements was $2 billion and $2 billion , respectively. Restricted cash is included in interest-bearing deposits with banks on the consolidated balance sheet. Securities segregated for these purposes were $1 billion at June 30, 2018 and $1 billion at Dec. 31, 2017 . Restricted securities were sourced from securities purchased under resale agreements at June 30, 2018 and Dec. 31, 2017 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	6 Months Ended
	Jun. 30, 2018
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 June 30, 2018 and Dec. 31, 2017 . Loans June 30, 2018 Dec. 31, 2017 (in millions) Domestic: Commercial $ 2,117 $ 2,744 Commercial real estate 4,974 4,900 Financial institutions 5,526 5,568 Lease financings 758 772 Wealth management loans and mortgages 16,191 16,420 Other residential mortgages 653 708 Overdrafts 1,090 963 Other 1,169 1,131 Margin loans 14,914 15,689 Total domestic 47,392 48,895 Foreign: Commercial 336 167 Commercial real estate 5 — Financial institutions 6,304 7,483 Lease financings 539 527 Wealth management loans and mortgages 110 108 Other (primarily overdrafts) 2,947 4,264 Margin loans 143 96 Total foreign 10,384 12,645 Total loans (a) $ 57,776 $ 61,540 (a) Net of unearned income of $375 million at June 30, 2018 and $394 million at Dec. 31, 2017 primarily related to 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 June 30, 2018 Wealth management loans and mortgages Other residential mortgages (in millions) Commercial Commercial real estate Financial institutions Lease financings All other Foreign Total Beginning balance $ 75 $ 75 $ 22 $ 7 $ 23 $ 19 $ — $ 35 $ 256 Charge-offs — — — — — — — — — Recoveries — — — — — 1 — — 1 Net recoveries — — — — — 1 — — 1 Provision 1 (1 ) 2 (1 ) — (2 ) — (2 ) (3 ) Ending balance $ 76 $ 74 $ 24 $ 6 $ 23 $ 18 $ — $ 33 $ 254 Allowance for: Loan losses $ 17 $ 55 $ 8 $ 6 $ 19 $ 18 $ — $ 22 $ 145 Lending-related commitments 59 19 16 — 4 — — 11 109 Individually evaluated for impairment: Loan balance $ — $ — $ — $ — $ 5 $ — $ — $ — $ 5 Allowance for loan losses — — — — — — — — — Collectively evaluated for impairment: Loan balance $ 2,117 $ 4,974 $ 5,526 $ 758 $ 16,186 $ 653 $ 17,173 (a) $ 10,384 $ 57,771 Allowance for loan losses 17 55 8 6 19 18 — 22 145 (a) Includes $1,090 million of domestic overdrafts, $14,914 million of margin loans and $1,169 million of other loans at June 30, 2018 . Allowance for credit losses activity for the quarter ended March 31, 2018 Wealth management loans and mortgages Other residential mortgages (in millions) Commercial Commercial real estate Financial institutions Lease financings All other Foreign Total Beginning balance $ 77 $ 76 $ 23 $ 8 $ 22 $ 20 $ — $ 35 $ 261 Charge-offs — — — — — — — — — Recoveries — — — — — — — — — Net recoveries — — — — — — — — — Provision (2 ) (1 ) (1 ) (1 ) 1 (1 ) — — (5 ) Ending balance $ 75 $ 75 $ 22 $ 7 $ 23 $ 19 $ — $ 35 $ 256 Allowance for: Loan losses $ 23 $ 58 $ 8 $ 7 $ 19 $ 19 $ — $ 22 $ 156 Lending-related commitments 52 17 14 — 4 — — 13 100 Individually evaluated for impairment: Loan balance $ — $ — $ 1 $ — $ 4 $ — $ — $ — $ 5 Allowance for loan losses — — — — 1 — — — 1 Collectively evaluated for impairment: Loan balance $ 2,284 $ 4,888 $ 5,781 $ 749 $ 16,284 $ 680 $ 16,867 (a) $ 13,271 $ 60,804 Allowance for loan losses 23 58 8 7 18 19 — 22 155 (a) Includes $785 million of domestic overdrafts, $14,993 million of margin loans and $1,089 million of other loans at March 31, 2018 . Allowance for credit losses activity for the quarter ended June 30, 2017 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 $ 73 $ 23 $ 10 $ 26 $ 25 $ — $ 37 $ 276 Charge-offs — — — — — — — — — Recoveries — — — — — 1 — — 1 Net recoveries — — — — — 1 — — 1 Provision (2 ) 2 — — (1 ) (3 ) — (3 ) (7 ) Ending balance $ 80 $ 75 $ 23 $ 10 $ 25 $ 23 $ — $ 34 $ 270 Allowance for: Loan losses $ 26 $ 55 $ 7 $ 10 $ 21 $ 23 $ — $ 23 $ 165 Lending-related commitments 54 20 16 — 4 — — 11 105 Individually evaluated for impairment: Loan balance $ — $ — $ 2 $ — $ 7 $ — $ — $ — $ 9 Allowance for loan losses — — 2 — 3 — — — 5 Collectively evaluated for impairment: Loan balance $ 2,580 $ 5,017 $ 5,952 $ 847 $ 16,024 $ 780 $ 15,950 (a) $ 14,514 $ 61,664 Allowance for loan losses 26 55 5 10 18 23 — 23 160 (a) Includes $855 million of domestic overdrafts, $13,973 million of margin loans and $1,122 million of other loans at June 30, 2017 . Allowance for credit losses activity for the six months ended June 30, 2018 Wealth management loans and mortgages Other All Foreign Total (in millions) Commercial Commercial Financial Lease Beginning balance $ 77 $ 76 $ 23 $ 8 $ 22 $ 20 $ — $ 35 $ 261 Charge-offs — — — — — — — — — Recoveries — — — — — 1 — — 1 Net recoveries — — — — — 1 — — 1 Provision (1 ) (2 ) 1 (2 ) 1 (3 ) — (2 ) (8 ) Ending balance $ 76 $ 74 $ 24 $ 6 $ 23 $ 18 $ — $ 33 $ 254 Allowance for credit losses activity for the six months ended June 30, 2017 Wealth management loans and mortgages Other All Foreign Total (in millions) Commercial Commercial Financial Lease Beginning balance $ 82 $ 73 $ 26 $ 13 $ 23 $ 28 $ — $ 36 $ 281 Charge-offs — — — — — (1 ) — — (1 ) Recoveries — — — — — 2 — — 2 Net recoveries — — — — — 1 — — 1 Provision (2 ) 2 (3 ) (3 ) 2 (6 ) — (2 ) (12 ) Ending balance $ 80 $ 75 $ 23 $ 10 $ 25 $ 23 $ — $ 34 $ 270 Nonperforming assets The table below presents our nonperforming assets. Nonperforming assets (in millions) June 30, 2018 Dec. 31, 2017 Nonperforming loans: Other residential mortgages $ 71 $ 78 Wealth management loans and mortgages 8 7 Commercial real estate — 1 Total nonperforming loans 79 86 Other assets owned 3 4 Total nonperforming assets $ 82 $ 90 Lost interest Interest income would have increased by $1 million in the second quarter of 2018, first quarter of 2018 and second quarter of 2017, $2 million in the first six months of 2018 and $3 million in the first six months of 2017 if nonperforming loans at period-end had been performing for the entire respective quarter. Impaired loans We use the discounted cash flow method as the primary method for valuing impaired loans. The average recorded investment and unpaid principal balance of impaired loans were less than $13 million for the second quarter of 2018, first quarter of 2018 and the second quarter of 2017. The allowance related to impaired loans was less than $1 million at June 30, 2018 and $1 million at Dec. 31, 2017. Past due loans The table below presents our past due loans. Past due loans and still accruing interest June 30, 2018 Dec. 31, 2017 Days past due Total past due Days past due Total past due (in millions) 30-59 60-89 ≥90 30-59 60-89 ≥90 Commercial real estate $ 104 $ 25 $ — $ 129 $ 44 $ — $ — $ 44 Wealth management loans and mortgages 17 1 — 18 39 5 — 44 Other residential mortgages 23 2 6 31 18 5 5 28 Financial institutions 24 — — 24 1 — — 1 Total past due loans $ 168 $ 28 $ 6 $ 202 $ 102 $ 10 $ 5 $ 117 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. We modified loans of $1 million in the second quarter of 2018, $1 million in the first quarter of 2018 and $4 million in the second quarter of 2017, primarily other residential mortgages. 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 present information about credit quality indicators. Commercial loan portfolio Commercial loan portfolio – Credit risk profile by creditworthiness category Commercial Commercial real estate Financial institutions June 30, Dec. 31, 2017 June 30, Dec. 31, 2017 June 30, Dec. 31, 2017 (in millions) Investment grade $ 2,342 $ 2,685 $ 4,266 $ 4,277 $ 9,262 $ 10,021 Non-investment grade 111 226 713 623 2,568 3,030 Total $ 2,453 $ 2,911 $ 4,979 $ 4,900 $ 11,830 $ 13,051 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) June 30, Dec. 31, 2017 Wealth management loans: Investment grade $ 6,791 $ 7,042 Non-investment grade 145 185 Wealth management mortgages 9,365 9,301 Total $ 16,301 $ 16,528 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 62% at origination. In the wealth management portfolio, less than 1% of the mortgages were past due at June 30, 2018 . At June 30, 2018 , the wealth management mortgage portfolio consisted of the following geographic concentrations: California - 24% ; New York - 18% ; Massachusetts - 11% ; Florida - 8% ; and other - 39% . Other residential mortgages The other residential mortgage portfolio primarily consists of 1-4 family residential mortgage loans and totaled $ 653 million at June 30, 2018 and $708 million at Dec. 31, 2017 . These loans are not typically correlated to external ratings. Included in this portfolio at June 30, 2018 are $151 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 June 30, 2018 , the purchased loans in this portfolio had a weighted-average loan-to-value ratio of 76% at origination, and 12% 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 $4.0 billion at June 30, 2018 and $5.1 billion at Dec. 31, 2017 . Overdrafts occur on a daily basis primarily 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 $15.1 billion of secured margin loans on our balance sheet at June 30, 2018 compared with $15.8 billion at Dec. 31, 2017 . 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	6 Months Ended
	Jun. 30, 2018
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 Investment Services Investment Management Other Consolidated (in millions) Balance at Dec. 31, 2017 $ 8,389 $ 9,128 $ 47 $ 17,564 Dispositions — (65 ) — (65 ) Foreign currency translation (31 ) (50 ) — (81 ) Balance at June 30, 2018 $ 8,358 $ 9,013 $ 47 $ 17,418 Goodwill by business Investment Services Investment Management Other Consolidated (in millions) Balance at Dec. 31, 2016 $ 8,269 $ 9,000 $ 47 $ 17,316 Foreign currency translation 72 69 — 141 Balance at June 30, 2017 $ 8,341 $ 9,069 $ 47 $ 17,457 Intangible assets The tables below provide a breakdown of intangible assets by business. Intangible assets – net carrying amount by business Investment Services Investment Management Other Consolidated (in millions) Balance at Dec. 31, 2017 $ 888 $ 1,674 $ 849 $ 3,411 Amortization (72 ) (25 ) — (97 ) Foreign currency translation (1 ) (5 ) — (6 ) Balance at June 30, 2018 $ 815 $ 1,644 $ 849 $ 3,308 Intangible assets – net carrying amount by business Investment Services Investment Management Other Consolidated (in millions) Balance at Dec. 31, 2016 $ 1,032 $ 1,717 $ 849 $ 3,598 Amortization (75 ) (30 ) — (105 ) Foreign currency translation 3 10 — 13 Balance at June 30, 2017 $ 960 $ 1,697 $ 849 $ 3,506 The table below provides a breakdown of intangible assets by type. Intangible assets June 30, 2018 Dec. 31, 2017 (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 contracts—Investment Services $ 2,255 $ (1,811 ) $ 444 10 years $ 2,260 $ (1,744 ) $ 516 Customer relationships—Investment Management 1,253 (1,030 ) 223 11 years 1,262 (1,015 ) 247 Other 29 (13 ) 16 4 years 42 (23 ) 19 Total subject to amortization 3,537 (2,854 ) 683 10 years 3,564 (2,782 ) 782 Not subject to amortization: (b) Tradenames 1,333 N/A 1,333 N/A 1,334 N/A 1,334 Customer relationships 1,292 N/A 1,292 N/A 1,295 N/A 1,295 Total not subject to amortization 2,625 N/A 2,625 N/A 2,629 N/A 2,629 Total intangible assets $ 6,162 $ (2,854 ) $ 3,308 N/A $ 6,193 $ (2,782 ) $ 3,411 (a) Excludes fully amortized intangible assets. (b) Intangible assets not subject to amortization have an indefinite life. N/A - Not applicable. Estimated annual amortization expense for current intangibles for the next five years is as follows: For the year ended Estimated amortization expense (in millions) 2018 $ 180 2019 116 2020 102 2021 79 2022 60 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. BNY Mellon’s three business segments include seven reporting units for which goodwill impairment testing is performed on an annual basis. The Investment Services segment is comprised of four reporting units; the Investment Management segment is comprised of two reporting units and one reporting unit is included in the Other segment. As a result of the annual goodwill impairment test of the seven reporting units conducted in the second quarter of 2018, no goodwill impairment was recognized.

Other assets

Other assets	6 Months Ended
	Jun. 30, 2018
Other Assets [Abstract]
Other assets	Other assets The following table provides the components of other assets presented on the consolidated balance sheet. Other assets June 30, 2018 Dec. 31, 2017 (in millions) Corporate/bank-owned life insurance $ 4,876 $ 4,857 Accounts receivable 3,675 4,590 Fails to deliver 3,073 2,817 Software 1,550 1,499 Prepaid pension assets 1,511 1,416 Renewable energy investments 1,324 1,368 Income taxes receivable 1,225 1,533 Equity in a joint venture and other investments 1,112 1,083 Qualified affordable housing project investments 1,054 1,014 Prepaid expense 502 395 Federal Reserve Bank stock 482 477 Fair value of hedging derivatives 313 323 Seed capital 302 288 Other (a) 1,508 1,369 Total other assets $ 22,507 $ 23,029 (a) At June 30, 2018 and Dec. 31, 2017 , other assets include $93 million and $82 million , respectively, of Federal Home Loan Bank stock, at cost. 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 $1.1 billion at June 30, 2018 and $1.0 billion at Dec. 31, 2017 . Commitments to fund future investments in qualified affordable housing projects totaled $498 million at June 30, 2018 and $486 million at Dec. 31, 2017 and is recorded in other liabilities. A summary of the commitments to fund future investments is as follows: 2018 – $113 million ; 2019 – $120 million ; 2020 – $119 million ; 2021 – $99 million ; 2022 – $29 million ; and 2023 and thereafter – $18 million . Tax credits and other tax benefits recognized were $42 million in the second quarter of 2018 , $40 million in the first quarter of 2018 , $38 million in the second quarter of 2017 , $82 million in the first six months of 2018 and $76 million in the first six months of 2017 . Amortization expense included in the provision for income taxes was $35 million in the second quarter of 2018 , $33 million in the first quarter of 2018 , $28 million in the second quarter of 2017 , $68 million in the first six months of 2018 and $55 million in the first six months of 2017 . Investments valued using net asset value per share In our Investment Management business, we manage investment assets, including equities, fixed income, money market and multi-asset and alternative investment funds for institutions and other investors. As part of that activity, we make seed capital investments in certain funds. We also hold private equity investments, specifically in small business investment companies (“SBICs”), which are compliant with the Volcker Rule, and certain other corporate investments. Seed capital, private equity and other corporate investments are included in other assets on the consolidated balance sheet. The fair value of these investments was estimated using the net asset value (“NAV”) per share for BNY Mellon’s ownership interest in the funds. The table below presents information on our investments valued using NAV. Other assets valued using NAV June 30, 2018 Dec. 31, 2017 (dollars in millions) Fair value Unfunded commitments Redemption frequency Redemption notice period Fair value Unfunded commitments Redemption frequency Redemption notice period Seed capital $ 44 $ — Daily-quarterly 1-90 days $ 40 $ 1 Daily-quarterly 1-90 days Private equity investments (SBICs) (a) 68 46 N/A N/A 55 42 N/A N/A Other ( b) 73 — Daily-quarterly 1-95 days 59 — Daily-quarterly 1-95 days Total $ 185 $ 46 $ 154 $ 43 (a) 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, which have a life of 10 years, are liquidated. (b) Primarily relates to investments in funds that relate to deferred compensation arrangements with employees. N/A - Not applicable.

Contract revenue

Contract revenue	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Contract revenue	Contract revenue Significant accounting policy Revenue is based on terms specified in a contract with a customer, and excludes any amounts collected on behalf of third parties. Revenue is recognized when, or as, a performance obligation is satisfied by transferring control of a good or service to a customer. A performance obligation may be satisfied over time or at a point in time. Revenue from a performance obligation satisfied over time is recognized by measuring our progress in satisfying the performance obligation in a manner that reflects the transfer of goods and services to the customer. Revenue from a performance obligation satisfied at a point in time is recognized at the point in time the customer obtains control of the promised good or service. The amount of revenue recognized reflects the consideration we expect to be entitled to in exchange for the promised goods and services. Taxes assessed by a governmental authority, that are both imposed on, and concurrent with, a specific revenue-producing transaction, are collected from a customer and are excluded from revenue. Nature of services and revenue recognition Fee revenue in Investment Services and Investment Management is primarily variable, based on levels of AUC/A, AUM and the level of client-driven transactions, as specified in fee schedules. Investment Services fees are based primarily on the market value of AUC/A; client accounts, balances and the volume of transactions; securities lending volume and spreads; and fees for other services. Certain fees based on the market value of assets are calculated in arrears on a monthly or quarterly basis. Substantially all services within the Investment Services business are provided over time. Revenue on these services is recognized using the time elapsed method, equal to the expected invoice amount, which typically represents the value provided to the customer for our performance completed to date. Trade execution and clearing services are delivered at a point-in-time, based on customer actions. Revenue for trade execution and clearing services is recognized on trade date, which is consistent with the time that the service was provided. Customers are generally billed for services on a monthly or quarterly basis. Investment management fees are dependent on the overall level and mix of AUM. The management fees, expressed in basis points, are charged for managing those assets. Management fees are typically subject to fee schedules based on the overall level of assets managed and products in which those assets are invested. Investment management fee revenue also includes transactional- and account-based fees. These fees along with distribution and servicing fees are recognized when the services have been complete. Clients are generally billed for services performed on a monthly or quarterly basis. Performance fees are generally calculated as a percentage of the applicable portfolio’s performance in excess of a benchmark index or a peer group’s performance. Performance fees are recognized at the end of the measurement period when they are determinable. See Note 19 for additional information on our two principal businesses, Investment Services and Investment Management and the primary services provided. Disaggregation of contract revenue Contract revenue is included in fee revenue on the consolidated income statement. The following table presents fee revenue related to contracts with customers, disaggregated by type, for each business segment. Disaggregation of contract revenue by business segment (a) Quarter ended June 30, 2018 Quarter ended March 31, 2018 (in millions) Investment Services Investment Management Other Total Investment Services Investment Management Other Total Fee revenue - contract revenue: Investment services fees: Asset servicing $ 1,098 $ 21 $ 1 $ 1,120 $ 1,117 $ 25 $ — $ 1,142 Clearing services 392 — — 392 413 — 1 414 Issuer services 265 — — 265 260 — — 260 Treasury services 140 1 — 141 138 — — 138 Total investment services fees 1,895 22 1 1,918 1,928 25 1 1,954 Investment management and performance fees 14 893 — 907 14 942 — 956 Financing-related fees 15 — — 15 17 — — 17 Distribution and servicing (14 ) 48 — 34 (14 ) 50 — 36 Investment and other income 69 (50 ) 1 20 69 (51 ) — 18 Total fee revenue - contract revenue 1,979 913 2 2,894 2,014 966 1 2,981 Fee and other revenue - not in scope of ASC 606 (b)(c) 254 28 39 321 236 46 7 289 Total fee and other revenue $ 2,233 $ 941 $ 41 $ 3,215 $ 2,250 $ 1,012 $ 8 $ 3,270 (a) Business segment data has been determined on an internal management basis of accounting, rather than the generally accepted accounting principles used for consolidated financial reporting. (b) Primarily includes foreign exchange and other trading revenue, financing-related fees, investment and other income and net securities gains, all of which are accounted for using other accounting guidance. (c) The Investment Management business includes income from consolidated investment management funds, net of noncontrolling interests, of $5 million in the second quarter of 2018 and less than $1 million in the first quarter of 2018. Disaggregation of contract revenue by business segment (a) Year-to-date June 30, 2018 (in millions) Investment Services Investment Management Other Total Fee revenue - contract revenue: Investment services fees: Asset servicing $ 2,215 $ 46 $ 1 $ 2,262 Clearing services 805 — 1 806 Issuer services 525 — — 525 Treasury services 278 1 — 279 Total investment services fees 3,823 47 2 3,872 Investment management and performance fees 28 1,835 — 1,863 Financing-related fees 32 — — 32 Distribution and servicing (28 ) 98 — 70 Investment and other income 138 (101 ) 1 38 Total fee revenue - contract revenue 3,993 1,879 3 5,875 Fee and other revenue - not in scope of ASC 606 (b)(c) 490 74 46 610 Total fee and other revenue $ 4,483 $ 1,953 $ 49 $ 6,485 (a) Business segment data has been determined on an internal management basis of accounting, rather than the generally accepted accounting principles used for consolidated financial reporting. (b) Primarily includes foreign exchange and other trading revenue, financing-related fees, investment and other income and net securities gains, all of which are accounted for using other accounting guidance. (c) The Investment Management business includes income from consolidated investment management funds, net of noncontrolling interests of $5 million in the first six months of 2018. Contract balances Our clients are billed based on fee schedules that are agreed upon in each customer contract. Receivables from customers were $3.9 billion at Jan. 1, 2018 and $2.4 billion at June 30, 2018 . An allowance is maintained for accounts receivables which is generally based on the number of days outstanding. Adjustments to the allowance are recorded in other expense in the consolidated income statement. Provisions of $4 million and $6 million were recorded in the second quarter of 2018 and first six months of 2018, respectively. Contract assets represent accrued revenues that have not yet been billed to the customers due to certain contractual terms other than the passage of time and were $30 million at Jan. 1, 2018 and $65 million at June 30, 2018 . Accrued revenues recorded as contract assets are usually billed on an annual basis. There were no impairments recorded on contract assets in the second quarter of 2018 . Both receivables from customers and contract assets are included in other assets on the consolidated balance sheet. Contract liabilities represent payments received in advance of providing services under certain contracts and were $167 million at Jan. 1, 2018 and $193 million at June 30, 2018 . Contract liabilities are included in other liabilities on the consolidated balance sheet. Revenue recognized in the second quarter of 2018 relating to contract liabilities as of March 31, 2018 was $53 million . Revenue recognized in the first six months of 2018 relating to contract liabilities as of Jan. 1, 2018 was $70 million . Changes in contract assets and liabilities primarily relate to either party’s performance under the contracts. Contract costs Incremental costs for obtaining contracts that are deemed recoverable are capitalized as contract costs. Such costs result from the payment of sales incentives, primarily in the Wealth Management business, and totaled $109 million at June 30, 2018 . Capitalized sales incentives are amortized based on the transfer of goods or services to which the assets relate and typically average nine years . The amortization of capitalized sales incentives, which is primarily included in staff expense, totaled $6 million in the second quarter of 2018 and $11 million in the first six months of 2018. Costs to fulfill a contract are capitalized when they relate directly to an existing contract or specific anticipated contract, generate or enhance resources that will be used to fulfill performance obligations and are recoverable. Such costs generally represent set-up costs, which include any direct cost incurred at inception of a contract which enables the fulfillment of the performance obligation and totaled $14 million at June 30, 2018 . These capitalized costs are amortized on a straight line basis over the expected contract period which generally range from seven to nine years . The amortization is included in other expense and totaled $2 million in the second quarter of 2018 and $3 million in the first six months of 2018. There were no impairments recorded on capitalized contract costs in the second quarter of 2018 . Unsatisfied performance obligations We do not have any unsatisfied performance obligations other than those that are subject to a practical expedient election under ASC 606, Revenue From Contracts With Customers . The practical expedient election applies to (i) contracts with an original expected length of one year or less, and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.

Net interest revenue

Net interest revenue	6 Months Ended
	Jun. 30, 2018
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 Year-to-date June 30, 2018 March 31, 2018 June 30, 2017 June 30, 2018 June 30, 2017 (in millions) Interest revenue Non-margin loans $ 345 $ 305 $ 272 $ 650 $ 517 Margin loans 128 115 87 243 162 Securities: Taxable 615 581 476 1,196 937 Exempt from federal income taxes 14 15 16 29 33 Total securities 629 596 492 1,225 970 Deposits with banks 56 42 27 98 49 Deposits with the Federal Reserve and other central banks 136 126 71 262 128 Federal funds sold and securities purchased under resale agreements 230 170 86 400 153 Trading assets 29 27 17 56 33 Total interest revenue 1,553 1,381 1,052 2,934 2,012 Interest expense Deposits 173 117 32 290 41 Federal funds purchased and securities sold under repurchase agreements 158 107 38 265 62 Trading liabilities 7 9 2 16 4 Other borrowed funds 14 9 4 23 6 Commercial paper 21 12 5 33 10 Customer payables 45 31 16 76 23 Long-term debt 219 177 129 396 248 Total interest expense 637 462 226 1,099 394 Net interest revenue 916 919 826 1,835 1,618 Provision for credit losses (3 ) (5 ) (7 ) (8 ) (12 ) Net interest revenue after provision for credit losses $ 919 $ 924 $ 833 $ 1,843 $ 1,630

Employee benefit plans

Employee benefit plans	6 Months Ended
	Jun. 30, 2018
Retirement Benefits [Abstract]
Employee benefit plans	Employee benefit plans The components of net periodic benefit (credit) cost are as follows. The service cost component is reflected in staff expense, whereas the remaining components are reflected in other expense. Net periodic benefit (credit) cost Quarter ended June 30, 2018 March 31, 2018 June 30, 2017 (in millions) Domestic pension benefits Foreign pension benefits Health care benefits Domestic pension benefits Foreign pension benefits Health care benefits Domestic pension benefits Foreign pension benefits Health care benefits Service cost $ — $ 7 $ — $ — $ 7 $ — $ — $ 7 $ — Interest cost 42 8 2 43 8 2 45 8 2 Expected return on assets (85 ) (14 ) (2 ) (85 ) (15 ) (2 ) (81 ) (12 ) (2 ) Other 17 6 — 17 6 (1 ) 17 9 (1 ) Net periodic benefit (credit) cost $ (26 ) $ 7 $ — $ (25 ) $ 6 $ (1 ) $ (19 ) $ 12 $ (1 ) Net periodic benefit (credit) cost Year-to-date June 30, 2018 June 30, 2017 (in millions) Domestic pension benefits Foreign pension benefits Health care benefits Domestic pension benefits Foreign pension benefits Health care benefits Service cost $ — $ 14 $ — $ — $ 14 $ — Interest cost 85 16 4 90 16 4 Expected return on assets (170 ) (29 ) (4 ) (162 ) (24 ) (4 ) Other 34 12 (1 ) 34 18 (2 ) Net periodic benefit (credit) cost $ (51 ) $ 13 $ (1 ) $ (38 ) $ 24 $ (2 )

Income taxes

Income taxes	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income taxes	Income taxes BNY Mellon recorded an income tax provision of $286 million ( 20.5% effective tax rate) in the second quarter of 2018 . The income tax provision was $332 million ( 25.4% effective tax rate) in the second quarter of 2017 and $282 million ( 19.5% effective tax rate) in the first quarter of 2018 . There were no adjustments recorded in the second quarter of 2018 to the estimated tax benefit related to U.S. tax legislation. Our total tax reserves as of June 30, 2018 were $101 million compared with $130 million at March 31, 2018 . If these tax reserves were unnecessary, $101 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 June 30, 2018 is accrued interest, where applicable, of $16 million . The additional tax expense related to interest for the six months ended June 30, 2018 was $2 million , compared with $4 million for the six months ended June 30, 2017 . It is reasonably possible the total reserve for uncertain tax positions could decrease within the next 12 months by approximately $7 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.

Variable interest entities and

Variable interest entities and securitization	6 Months Ended
	Jun. 30, 2018
Securitizations And Variable Interest Entities Disclosure [Abstract]
Variable interest entities and securitization	Variable interest entities and securitization 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 previously discussed are included in the scope of ASU 2015-02 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 table presents the incremental assets and liabilities included in BNY Mellon’s consolidated financial statements, after applying intercompany eliminations, as of June 30, 2018 and Dec. 31, 2017 . 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. Consolidated investments June 30, 2018 Dec. 31, 2017 (in millions) Investment Management funds Securitization Total consolidated investments Investment Management funds Securitization Total consolidated investments Securities - Available-for-sale $ — $ — $ — $ — $ 400 $ 400 Trading assets 175 400 575 516 — 516 Other assets 253 — 253 215 — 215 Total assets $ 428 (a) $ 400 $ 828 $ 731 (b) $ 400 $ 1,131 Other liabilities $ 3 $ 363 $ 366 $ 2 $ 367 $ 369 Total liabilities $ 3 (a) $ 363 $ 366 $ 2 (b) $ 367 $ 369 Nonredeemable noncontrolling interests $ 52 (a) $ — $ 52 $ 316 (b) $ — $ 316 (a) Includes voting model entities (“VMEs”) with assets of $295 million , liabilities of $3 million and nonredeemable noncontrolling interests of less than $1 million . (b) Includes VMEs with assets of $84 million , liabilities of $1 million and nonredeemable noncontrolling interests of $1 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 June 30, 2018 and Dec. 31, 2017 , the following assets and liabilities related to the VIEs where BNY Mellon is not the primary beneficiary are included in our consolidated financial statements and primarily relate to accounting for our investments in qualified affordable housing and renewable energy projects. The maximum loss exposure indicated in the table below relates solely to BNY Mellon’s investments in, and unfunded commitments to, the VIEs. Non-consolidated VIEs June 30, 2018 Dec. 31, 2017 (in millions) Assets Liabilities Maximum loss exposure Assets Liabilities Maximum loss exposure Securities - Available-for-sale (a) $ 222 $ — $ 222 $ 203 $ — $ 203 Other 2,603 498 3,101 2,592 486 3,078 (a) Includes investments in the Company’s sponsored CLOs.

Preferred stock

Preferred stock	6 Months Ended
	Jun. 30, 2018
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 June 30, 2018 and Dec. 31, 2017 . Preferred stock summary (a) Total shares issued and outstanding Carrying value (b) (in millions) Per annum dividend rate June 30, 2018 Dec. 31, 2017 June 30, 2018 Dec. 31, 2017 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 June 20, 2018, The Bank of New York Mellon Corporation paid the following dividends for the noncumulative perpetual preferred stock for the dividend period ending in June 2018 to holders of record as of the close of business on June 5, 2018: • $1,022.22 per share on the Series A Preferred Stock (equivalent to $10.2222 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); • $2,250.00 per share on the Series D Preferred Stock (equivalent to $22.5000 per depositary share, each representing a 1/100th interest in a share of the Series D Preferred Stock); and • $2,475.00 per share on the Series E Preferred Stock (equivalent to $24.7500 per depositary share, each representing a 1/100th interest in a share of the Series E Preferred Stock). For additional information on the preferred stock, see Note 13 of the Notes to Consolidated Financial Statements in our 2017 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)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Other comprehensive income (loss)	Other comprehensive income (loss) Components of other comprehensive income (loss) Quarter ended June 30, 2018 March 31, 2018 June 30, 2017 (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) $ (302 ) $ (98 ) $ (400 ) $ 201 $ 43 $ 244 $ 249 $ 81 $ 330 Total foreign currency translation (302 ) (98 ) (400 ) 201 43 244 249 81 330 Unrealized (loss) gain on assets available-for-sale: Unrealized (loss) gain arising during period (103 ) 39 (64 ) (342 ) 67 (275 ) 146 (55 ) 91 Reclassification adjustment (b) (1 ) 1 — 49 (12 ) 37 — (1 ) (1 ) Net unrealized (loss) gain on assets available-for-sale (104 ) 40 (64 ) (293 ) 55 (238 ) 146 (56 ) 90 Defined benefit plans: Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost (b) 22 (6 ) 16 22 (5 ) 17 24 (8 ) 16 Total defined benefit plans 22 (6 ) 16 22 (5 ) 17 24 (8 ) 16 Unrealized gain (loss) on cash flow hedges: Unrealized hedge (loss) gain arising during period (17 ) 3 (14 ) 7 (1 ) 6 (8 ) 4 (4 ) Reclassification of net loss (gain) to net income: FX contracts - other revenue 1 — 1 (4 ) 1 (3 ) — — — FX contracts - salary expense (2 ) 1 (1 ) (6 ) 1 (5 ) 9 (4 ) 5 Total reclassifications to net income (b) (1 ) 1 — (10 ) 2 (8 ) 9 (4 ) 5 Net unrealized (loss) gain on cash flow hedges (18 ) 4 (14 ) (3 ) 1 (2 ) 1 — 1 Total other comprehensive (loss) income $ (402 ) $ (60 ) $ (462 ) $ (73 ) $ 94 $ 21 $ 420 $ 17 $ 437 Components of other comprehensive income (loss) Year-to-date June 30, 2018 June 30, 2017 (in millions) 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) $ (101 ) $ (55 ) $ (156 ) $ 345 $ 110 $ 455 Total foreign currency translation (101 ) (55 ) (156 ) 345 110 455 Unrealized (loss) gain on assets available-for-sale: Unrealized (loss) gain arising during period (445 ) 106 (339 ) 310 (125 ) 185 Reclassification adjustment (b) 48 (11 ) 37 (10 ) 3 (7 ) Net unrealized (loss) gain on assets available-for-sale (397 ) 95 (302 ) 300 (122 ) 178 Defined benefit plans: Net gain (loss) arising during the period — — — 3 (1 ) 2 Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost (b) 44 (11 ) 33 49 (15 ) 34 Total defined benefit plans 44 (11 ) 33 52 (16 ) 36 Unrealized (loss) gain on cash flow hedges: Unrealized hedge (loss) gain arising during period (10 ) 2 (8 ) 6 (1 ) 5 Reclassification of net loss (gain) to net income: FX contracts - trading revenue — — — (3 ) 1 (2 ) FX contracts - other revenue (3 ) 1 (2 ) — — — FX contracts - salary expense (8 ) 2 (6 ) 13 (5 ) 8 Total reclassifications to net income (b) (11 ) 3 (8 ) 10 (4 ) 6 Net unrealized (loss) gain on cash flow hedges (21 ) 5 (16 ) 16 (5 ) 11 Total other comprehensive (loss) income $ (475 ) $ 34 $ (441 ) $ 713 $ (33 ) $ 680 (a) Includes the impact of hedges of net investments in foreign subsidiaries. See Note 17 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 17 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	6 Months Ended
	Jun. 30, 2018
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 2017 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 June 30, 2018 and Dec. 31, 2017 , 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 second quarter of 2018 . Assets measured at fair value on a recurring basis at June 30, 2018 Total carrying (dollars in millions) Level 1 Level 2 Level 3 Netting (a) Available-for-sale securities: U.S. Treasury $ 18,855 $ — $ — $ — $ 18,855 U.S. government agencies — 1,447 — — 1,447 Sovereign debt/sovereign guaranteed 9,353 2,733 — — 12,086 State and political subdivisions — 2,630 — — 2,630 Agency RMBS — 24,803 — — 24,803 Non-agency RMBS (b) — 1,507 — — 1,507 Non-agency commercial MBS — 1,378 — — 1,378 Agency commercial MBS — 9,566 — — 9,566 CLOs — 3,177 — — 3,177 Corporate bonds — 1,146 — — 1,146 Other debt securities — 4,452 — — 4,452 Foreign covered bonds — 2,893 — — 2,893 Total available-for-sale securities 28,208 55,732 — — 83,940 Trading assets: Debt instruments 1,054 2,019 — — 3,073 Equity instruments (c) 1,087 — — — 1,087 Derivative assets not designated as hedging: Interest rate 14 3,572 — (2,322 ) 1,264 Foreign exchange — 5,082 — (3,495 ) 1,587 Equity and other contracts 1 77 — (54 ) 24 Total derivative assets not designated as hedging 15 8,731 — (5,871 ) 2,875 Total trading assets 2,156 10,750 — (5,871 ) 7,035 Other assets: Derivative assets designated as hedging: Interest rate — 60 — — 60 Foreign exchange — 253 — — 253 Total derivative assets designated as hedging — 313 — — 313 Other assets (d) 122 223 — — 345 Other assets measured at NAV (d) 185 Total other assets 122 536 — — 843 Subtotal assets of operations at fair value 30,486 67,018 — (5,871 ) 91,818 Percentage of assets of operations prior to netting 31 % 69 % — % Assets of consolidated investment management funds 154 274 — — 428 Total assets $ 30,640 $ 67,292 $ — $ (5,871 ) $ 92,246 Percentage of total assets prior to netting 31 % 69 % — % Liabilities measured at fair value on a recurring basis at June 30, 2018 Total carrying (dollars in millions) Level 1 Level 2 Level 3 Netting (a) Trading liabilities: Debt instruments $ 973 $ 116 $ — $ — $ 1,089 Equity instruments 5 — — — 5 Derivative liabilities not designated as hedging: Interest rate 7 3,101 — (2,428 ) 680 Foreign exchange — 5,612 — (3,862 ) 1,750 Equity and other contracts — 136 — (80 ) 56 Total derivative liabilities not designated as hedging 7 8,849 — (6,370 ) 2,486 Total trading liabilities 985 8,965 — (6,370 ) 3,580 Long-term debt (c) — 363 — — 363 Other liabilities – derivative liabilities designated as hedging: Interest rate — 62 — — 62 Foreign exchange — 13 — — 13 Total other liabilities – derivative liabilities designated as hedging — 75 — — 75 Subtotal liabilities of operations at fair value 985 9,403 — (6,370 ) 4,018 Percentage of liabilities of operations prior to netting 9 % 91 % — % Liabilities of consolidated investment management funds — 3 — — 3 Total liabilities $ 985 $ 9,406 $ — $ (6,370 ) $ 4,021 Percentage of total liabilities prior to netting 9 % 91 % — % (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 $943 million in Level 2 that was included in the former Grantor Trust. (c) Includes certain interests in securitizations. (d) Includes seed capital, private equity and other assets. Assets measured at fair value on a recurring basis at Dec. 31, 2017 Total carrying value (dollars in millions) Level 1 Level 2 Level 3 Netting (a) Available-for-sale securities: U.S. Treasury $ 15,263 $ — $ — $ — $ 15,263 U.S. government agencies — 908 — — 908 Sovereign debt/sovereign guaranteed 9,919 2,638 — — 12,557 State and political subdivisions — 2,957 — — 2,957 Agency RMBS — 23,819 — — 23,819 Non-agency RMBS (b) — 1,578 — — 1,578 Other RMBS — 149 — — 149 Non-agency commercial MBS — 1,360 — — 1,360 Agency commercial MBS — 8,762 — — 8,762 CLOs — 2,909 — — 2,909 Other asset-backed securities — 1,043 — — 1,043 Money market funds (c) 963 — — — 963 Corporate bonds — 1,255 — — 1,255 Other debt securities — 3,491 — — 3,491 Foreign covered bonds — 2,529 — — 2,529 Total available-for-sale securities 26,145 53,398 — — 79,543 Trading assets: Debt and equity instruments (c) 1,344 1,910 — — 3,254 Derivative assets not designated as hedging: Interest rate 9 6,430 — (5,075 ) 1,364 Foreign exchange — 5,104 — (3,720 ) 1,384 Equity and other contracts — 70 — (50 ) 20 Total derivative assets not designated as hedging 9 11,604 — (8,845 ) 2,768 Total trading assets 1,353 13,514 — (8,845 ) 6,022 Other assets : Derivative assets designated as hedging: Interest rate — 278 — — 278 Foreign exchange — 45 — — 45 Total derivative assets designated as hedging — 323 — — 323 Other assets (d) 144 170 — — 314 Other assets measured at NAV (d) 154 Total other assets 144 493 — — 791 Subtotal assets of operations at fair value 27,642 67,405 — (8,845 ) 86,356 Percentage of assets of operations prior to netting 29 % 71 % — % Assets of consolidated investment management funds 322 409 — — 731 Total assets $ 27,964 $ 67,814 $ — $ (8,845 ) $ 87,087 Percentage of total assets prior to netting 29 % 71 % — % Liabilities measured at fair value on a recurring basis at Dec. 31, 2017 Total carrying value (dollars in millions) Level 1 Level 2 Level 3 Netting (a) Trading liabilities: Debt and equity instruments $ 1,128 $ 80 $ — $ — $ 1,208 Derivative liabilities not designated as hedging: Interest rate 4 6,349 — (5,495 ) 858 Foreign exchange — 5,067 — (3,221 ) 1,846 Equity and other contracts — 153 — (81 ) 72 Total derivative liabilities not designated as hedging 4 11,569 — (8,797 ) 2,776 Total trading liabilities 1,132 11,649 — (8,797 ) 3,984 Long-term debt ( c ) — 367 — — 367 Other liabilities – derivative liabilities designated as hedging: Interest rate — 534 — — 534 Foreign exchange — 266 — — 266 Total other liabilities – derivative liabilities designated as hedging — 800 — — 800 Subtotal liabilities of operations at fair value 1,132 12,816 — (8,797 ) 5,151 Percentage of liabilities of operations prior to netting 8 % 92 % — % Liabilities of consolidated investment management funds 1 1 — — 2 Total liabilities $ 1,133 $ 12,817 $ — $ (8,797 ) $ 5,153 Percentage of total liabilities prior to netting 8 % 92 % — % (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 $1,091 million in Level 2 that was included in the former Grantor Trust. (c) Includes certain interests in securitizations. (d) Includes private equity investments and seed capital. Details of certain available-for-sale securities measured at fair value on a recurring basis June 30, 2018 Dec. 31, 2017 Total carrying value (b) Ratings (a) Total carrying value Ratings (a) AAA/ AA- A+/ A- BBB+/ BBB- BB+ and lower AAA/ AA- A+/ A- BBB+/ BBB- BB+ and lower (dollars in millions) (b) Non-agency RMBS (c) , originated in: 2007 $ 355 15 % 2 % 4 % 79 % $ 419 13 % 3 % — % 84 % 2006 412 — 17 1 82 467 — 17 — 83 2005 454 6 1 5 88 509 6 2 6 86 2004 and earlier 286 3 5 31 61 332 3 2 31 64 Total non-agency RMBS $ 1,507 6 % 7 % 8 % 79 % $ 1,727 (d) 6 % 6 % 8 % 80 % Non-agency commercial MBS, originated in: 2009-2017 $ 1,331 96 % 4 % — % — % $ 1,309 94 % 6 % — % — % 2005 47 100 — — — 51 100 — — — Total non-agency commercial MBS $ 1,378 96 % 4 % — % — % $ 1,360 94 % 6 % — % — % Foreign covered bonds: Canada $ 1,619 100 % — % — % — % $ 1,659 100 % — % — % — % United Kingdom 450 100 — — — 103 100 — — — Australia 330 100 — — — 265 100 — — — Sweden 193 100 — — — 136 100 — — — Other 301 100 — — — 366 100 — — — Total foreign covered bonds $ 2,893 100 % — % — % — % $ 2,529 100 % — % — % — % Sovereign debt/sovereign guaranteed: United Kingdom $ 3,044 100 % — % — % — % $ 3,052 100 % — % — % — % Germany 1,844 100 — — — 1,586 100 — — — France 1,809 100 — — — 2,046 100 — — — Spain 1,549 — — 100 — 1,635 — — 100 — Italy 986 — — 100 — 1,292 — — 100 — Netherlands 899 100 — — — 1,027 100 — — — Ireland 804 — 100 — — 843 — 100 — — Belgium 317 100 — — — 803 100 — — — Other (e) 834 86 — — 14 273 50 — — 50 Total sovereign debt/sovereign guaranteed $ 12,086 71 % 7 % 21 % 1 % $ 12,557 69 % 7 % 23 % 1 % (a) Represents ratings by S&P or the equivalent. (b) At June 30, 2018 and Dec. 31, 2017 , sovereign debt/sovereign guaranteed securities 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. (c) Includes $943 million at June 30, 2018 and $1,091 million at Dec. 31, 2017 that were included in the former Grantor Trust. (d) Includes other RMBS. (e) Includes non-investment grade sovereign debt/sovereign guaranteed securities related to Brazil of $116 million at June 30, 2018 and $136 million at Dec. 31, 2017 . 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 as well as the unobservable parameters in our valuation methodologies. We also manage the risks of Level 3 financial instruments using securities and derivatives that are Level 1 or Level 2 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. There were no financial instruments recorded at fair value on a recurring basis classified in Level 3 of the valuation hierarchy in the first six months of 2018 and the first six months of 2017 . 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. Examples would be the recording of an impairment of an asset and non-readily marketable equity securities carried at cost with upward or downward adjustments. The following tables present the financial instruments carried on the consolidated balance sheet by caption and level in the fair value hierarchy as of June 30, 2018 and Dec. 31, 2017 , for which a nonrecurring change in fair value has been recorded during the quarters ended June 30, 2018 and Dec. 31, 2017 . Assets measured at fair value on a nonrecurring basis at June 30, 2018 Total carrying value (in millions) Level 1 Level 2 Level 3 Loans (a) $ — $ 67 $ 5 $ 72 Other assets (b) — 26 — 26 Total assets at fair value on a nonrecurring basis $ — $ 93 $ 5 $ 98 Assets measured at fair value on a nonrecurring basis at Dec. 31, 2017 Total carrying value (in millions) Level 1 Level 2 Level 3 Loans (a) $ — $ 73 $ 6 $ 79 Other assets (b) — 4 — 4 Total assets at fair value on a nonrecurring basis $ — $ 77 $ 6 $ 83 (a) During the quarters ended June 30, 2018 and Dec. 31, 2017 , the fair value of these loans decreased less than $1 million and less than $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 June 30, 2018 and Dec. 31, 2017 , by caption on the consolidated balance sheet and by the valuation hierarchy. See Note 18 of the Notes to Consolidated Financial Statements in our 2017 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 June 30, 2018 (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 $ — $ 75,116 $ — $ 75,116 $ 75,116 Interest-bearing deposits with banks — 16,155 — 16,155 16,134 Federal funds sold and securities purchased under resale agreements — 26,494 — 26,494 26,494 Securities held-to-maturity 5,948 28,240 — 34,188 35,141 Loans (a) — 56,412 — 56,412 56,334 Other financial assets 5,361 1,353 — 6,714 6,714 Total $ 11,309 $ 203,770 $ — $ 215,079 $ 215,933 Liabilities: Noninterest-bearing deposits $ — $ 75,463 $ — $ 75,463 $ 75,463 Interest-bearing deposits — 152,843 — 152,843 155,097 Federal funds purchased and securities sold under repurchase agreements — 13,200 — 13,200 13,200 Payables to customers and broker-dealers — 19,123 — 19,123 19,123 Commercial paper — 2,508 — 2,508 2,508 Borrowings — 3,006 — 3,006 3,006 Long-term debt — 27,403 — 27,403 27,897 Total $ — $ 293,546 $ — $ 293,546 $ 296,294 (a) Does not include the leasing portfolio. Summary of financial instruments Dec. 31, 2017 (in millions) Level 1 Level 2 Level 3 Total estimated Carrying Assets: Interest-bearing deposits with the Federal Reserve and other central banks $ — $ 91,510 $ — $ 91,510 $ 91,510 Interest-bearing deposits with banks — 11,982 — 11,982 11,979 Federal funds sold and securities purchased under resale agreements — 28,135 — 28,135 28,135 Securities held-to-maturity 11,365 29,147 — 40,512 40,827 Loans (a) — 60,219 — 60,219 60,082 Other financial assets 5,382 1,244 — 6,626 6,626 Total $ 16,747 $ 222,237 $ — $ 238,984 $ 239,159 Liabilities: Noninterest-bearing deposits $ — $ 82,716 $ — $ 82,716 $ 82,716 Interest-bearing deposits — 160,042 — 160,042 161,606 Federal funds purchased and securities sold under repurchase agreements — 15,163 — 15,163 15,163 Payables to customers and broker-dealers — 20,184 — 20,184 20,184 Commercial paper — 3,075 — 3,075 3,075 Borrowings — 2,931 — 2,931 2,931 Long-term debt — 27,789 — 27,789 27,612 Total $ — $ 311,900 $ — $ 311,900 $ 313,287 (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 (a) (in millions) Gain (Loss) June 30, 2018 Securities available-for-sale $ 16,308 $ 16,756 $ 60 $ (62 ) Long-term debt 23,460 24,100 — — Dec. 31, 2017 Securities available-for-sale $ 12,307 $ 12,365 $ 102 $ (301 ) Long-term debt 23,821 23,950 175 (233 ) (a) Unrealized gain/loss amounts reflect the fact that certain of the derivatives are cleared and settled through central clearing counterparties where cash collateral received and paid is deemed a settlement of the derivative.

Fair value option

Fair value option	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair value option	Fair value option We elected fair value as an alternative measurement for selected financial assets and liabilities. The following table presents the assets and liabilities of consolidated investment management funds, at fair value. Assets and liabilities of consolidated investment management funds, at fair value June 30, 2018 Dec. 31, 2017 (in millions) Assets of consolidated investment management funds: Trading assets $ 175 $ 516 Other assets 253 215 Total assets of consolidated investment management funds $ 428 $ 731 Liabilities of consolidated investment management funds: Other liabilities $ 3 $ 2 Total liabilities of consolidated investment management funds $ 3 $ 2 BNY Mellon values the assets and liabilities of its consolidated investment 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 investment management funds. Changes in the value of the assets and liabilities are recorded in the consolidated 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 $363 million at June 30, 2018 and $367 million at Dec. 31, 2017 . 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 change in fair value of long-term debt recorded in foreign exchange and other trading revenue in the consolidated income statement. Foreign exchange and other trading revenue (a) (in millions) 2Q18 1Q18 2Q17 YTD18 YTD17 Long-term debt $ — $ 4 $ (4 ) $ 4 $ (5 ) (a) The change in fair value is approximately offset by an economic hedge included in foreign exchange and other trading revenue.

Derivative instruments

Derivative instruments	6 Months Ended
	Jun. 30, 2018
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 second quarter of 2018 or the second quarter of 2017 . Hedging derivatives We utilize interest rate swap agreements to manage our exposure to interest rate fluctuations. We enter into fair value hedges as an interest rate risk management strategy to reduce fair value variability by converting certain fixed rate interest payments associated with available-for-sale securities, deposits and long-term debt to LIBOR. The available-for-sale securities hedged consist of U.S. Treasury bonds, agency and non-agency commercial MBS, sovereign debt, corporate bonds and covered bonds that had original maturities of 30 years or less at initial purchase. At June 30, 2018 , $16.6 billion face amount of available-for-sale securities were hedged with interest rate swaps designated as fair value hedges that had notional values of $16.6 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 debt is hedged with “receive fixed rate, pay variable rate” swaps. At June 30, 2018 , $24.1 billion par value of debt was hedged with interest rate swaps that had notional values of $24.1 billion . In addition, we utilize forward foreign exchange contracts as hedges to mitigate foreign exchange exposures. We use forward foreign exchange contracts as cash flow hedges to convert certain forecasted non-U.S. dollar revenue and expenses into U.S. dollars. We use forward foreign exchange contracts with maturities of 12 months or less as cash flow hedges to hedge our foreign exchange exposure to Indian rupee, British pound, Hong Kong dollar, Singapore dollar, Polish zloty and Canadian dollar revenue and expense transactions in entities that have the U.S. dollar as their functional currency. As of June 30, 2018 , the hedged forecasted foreign currency transactions and designated forward foreign exchange contract hedges were $269 million (notional), with a pre-tax loss of $9 million recorded in accumulated other comprehensive income. This loss will be reclassified to earnings over the next 12 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 one year . 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 June 30, 2018 , forward foreign exchange contracts with notional amounts totaling $7.5 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 June 30, 2018 , had a combined U.S. dollar equivalent value of $178 million . The following table presents the gains (losses) related to our hedging derivative portfolio recognized in the income statement. Income statement impact of fair value and cash flow hedges (in millions) Location of gains (losses) 2Q18 1Q18 2Q17 YTD18 YTD17 Fair value hedges of available-for-sale securities Derivative Interest income $ 136 $ 397 $ (103 ) $ 533 $ (21 ) Hedged item Interest income (133 ) (383 ) 89 (516 ) 8 Fair value hedges of long-term debt Derivative Interest expense (131 ) (378 ) 105 (509 ) 33 Hedged item Interest expense 129 377 (98 ) 506 (31 ) Cash flow hedges of forecasted FX exposures Gain reclassified from OCI into income Trading revenue — — — — 3 (Loss) gain reclassified from OCI into income Other revenue (1 ) 4 — 3 — Gain (loss) reclassified from OCI into income Salary expense 2 6 (9 ) 8 (13 ) Gains (losses) recognized in the consolidated income statement due to fair value and cash flow hedging relationships $ 2 $ 23 $ (16 ) $ 25 $ (21 ) The following table presents the impact of hedging derivatives used in net investment hedging relationships in the income statement. Impact of derivative instruments used in net investment hedging relationships in the income statement (in millions) Derivatives in net investment hedging relationships Gain or (loss) recognized in accumulated OCI on derivatives Location of gain or (loss) reclassified from accumulated OCI into income Gain or (loss) reclassified from accumulated OCI into income 2Q18 1Q18 2Q17 YTD18 YTD17 2Q18 1Q18 2Q17 YTD18 YTD17 FX contracts $ 429 $ (158 ) $ (274 ) $ 271 $ (370 ) Net interest revenue $ — $ — $ — $ — $ — The following table presents information on the hedged items in fair value hedging relationships. Hedged items in fair value hedging relationships at June 30, 2018 Carrying amount of hedged asset or liability Hedge accounting basis adjustment (decrease) (in millions) Available-for-sale securities $ 16,308 $ (375 ) Long-term debt 23,460 (640 ) (a) (a) Includes $14 million of basis adjustment (reduction) on long-term debt associated with terminated hedges, whereby the long-term debt instrument has been subsequently re-designated in new hedge relationships existing as of the balance sheet date. The following table summarizes the notional amount and credit exposure of our total derivative portfolio at June 30, 2018 and Dec. 31, 2017 . Impact of derivative instruments on the balance sheet Notional value Asset derivatives fair value Liability derivatives fair value (in millions) June 30, 2018 Dec. 31, 2017 June 30, 2018 Dec. 31, 2017 June 30, 2018 Dec. 31, 2017 Derivatives designated as hedging instruments: (a)(b) Interest rate contracts $ 40,856 $ 36,315 $ 60 $ 278 $ 62 $ 534 Foreign exchange contracts 7,811 8,923 253 45 13 266 Total derivatives designated as hedging instruments $ 313 $ 323 $ 75 $ 800 Derivatives not designated as hedging instruments: (b)(c) Interest rate contracts $ 257,199 $ 267,485 $ 3,586 $ 6,439 $ 3,108 $ 6,353 Foreign exchange contracts 728,861 767,999 5,082 5,104 5,612 5,067 Equity contracts 1,142 1,698 78 70 133 149 Credit contracts 180 180 — — 3 4 Total derivatives not designated as hedging instruments $ 8,746 $ 11,613 $ 8,856 $ 11,573 Total derivatives fair value (d) $ 9,059 $ 11,936 $ 8,931 $ 12,373 Effect of master netting agreements (e) (5,871 ) (8,845 ) (6,370 ) (8,797 ) Fair value after effect of master netting agreements $ 3,188 $ 3,091 $ 2,561 $ 3,576 (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) Pursuant to a rule change at a clearing organization in 2018, cash collateral exchanged is deemed a settlement of the derivative each day. The impact of the change reduced the gross fair value of derivative asset and liabilities and a corresponding decrease in effect of master netting agreements, with no impact to the consolidated balance sheet. (c) 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. (d) Fair values are on a gross basis, before consideration of master netting agreements, as required by ASC 815, Derivatives and Hedging. (e) Effect of master netting agreements includes cash collateral received and paid of $740 million and $1,239 million , respectively, at June 30, 2018 , and $925 million and $877 million , respectively, at Dec. 31, 2017 . 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 are allocated to lines of business for computing risk-adjusted performance. VaR methodology does not evaluate risk attributable to extraordinary financial, economic or other occurrences. As a result, 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. The following table presents our foreign exchange and other trading revenue. Foreign exchange and other trading revenue (in millions) 2Q18 1Q18 2Q17 YTD18 YTD17 Foreign exchange $ 171 $ 183 $ 151 $ 354 $ 305 Other trading revenue 16 26 14 42 24 Total foreign exchange and other trading revenue $ 187 $ 209 $ 165 $ 396 $ 329 Foreign exchange revenue includes income from purchasing and selling foreign currencies and currency forwards, futures and options. Other trading revenue reflects results from trading in cash instruments including fixed income and equity securities and non-foreign exchange derivatives. 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 and/or highly liquid government securities. Collateral requirements are monitored and adjusted daily. Additional disclosures concerning derivative financial instruments are provided in Note 15 of the Notes to Consolidated Financial Statements. Disclosure of contingent features in OTC derivative instruments Certain OTC derivative contracts and/or collateral agreements contain credit-risk contingent features triggered upon a rating downgrade in which the counterparty has the right to request additional collateral or the right to terminate the contracts in a net liability position. The following table shows the aggregate fair value of OTC derivative contracts in net liability positions that contained credit-risk contingent features and the value of collateral that has been posted. (in millions) June 30, 2018 Dec. 31, 2017 Aggregate fair value of OTC derivatives in net liability positions (a) $ 2,861 $ 2,393 Collateral posted $ 3,183 $ 2,115 (a) Before consideration of cash collateral. The aggregate fair value of OTC derivative contracts containing credit-risk contingent features can fluctuate from quarter to quarter due to changes in market conditions, composition of counterparty trades, new business or changes to the contingent features. The Bank of New York Mellon, our largest banking subsidiary, enters into the substantial majority of our OTC derivative contracts and/or collateral agreements. As such, the contingent features may be triggered if The Bank of New York Mellon’s long-term issuer rating was downgraded. The following table shows the fair value of contracts falling under early termination provisions that were in net liability positions for three key ratings triggers. Potential close-out exposures (fair value) (a) (in millions) June 30, 2018 Dec. 31, 2017 If The Bank of New York Mellon’s rating changed to: (b) A3/A- $ 35 $ 92 Baa2/BBB $ 282 $ 748 Ba1/BB+ $ 1,327 $ 2,007 (a) The amounts represent potential total close-out values if The Bank of New York Mellon’s long-term issuer rating were to immediately drop to the indicated levels, and do not reflect collateral posted. (b) Represents rating by Moody’s/S&P. If The Bank of New York Mellon’s debt rating had fallen below investment grade on June 30, 2018 and Dec. 31, 2017, existing collateral arrangements would have required us to post additional collateral of $115 million and $102 million , respectively. 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 June 30, 2018 Gross assets recognized Gross amounts offset in the balance sheet Net assets recognized in 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 $ 2,783 $ 2,322 $ 461 $ 157 $ — $ 304 Foreign exchange contracts 4,621 3,495 1,126 52 — 1,074 Equity and other contracts 74 54 20 — — 20 Total derivatives subject to netting arrangements 7,478 5,871 1,607 209 — 1,398 Total derivatives not subject to netting arrangements 1,581 — 1,581 — — 1,581 Total derivatives 9,059 5,871 3,188 209 — 2,979 Reverse repurchase agreements 51,949 36,766 (b) 15,183 15,142 — 41 Securities borrowing 11,303 — 11,303 10,974 — 329 Total $ 72,311 $ 42,637 $ 29,674 $ 26,325 $ — $ 3,349 Offsetting of derivative assets and financial assets at Dec. 31, 2017 Gross assets recognized Gross amounts offset in the balance sheet Net assets recognized in 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 $ 5,915 $ 5,075 $ 840 $ 178 $ — $ 662 Foreign exchange contracts 4,666 3,720 946 116 — 830 Equity and other contracts 67 50 17 — — 17 Total derivatives subject to netting arrangements 10,648 8,845 1,803 294 — 1,509 Total derivatives not subject to netting arrangements 1,288 — 1,288 — — 1,288 Total derivatives 11,936 8,845 3,091 294 — 2,797 Reverse repurchase agreements 42,784 25,848 (b) 16,936 16,923 — 13 Securities borrowing 11,199 — 11,199 10,858 — 341 Total $ 65,919 $ 34,693 $ 31,226 $ 28,075 $ — $ 3,151 (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 June 30, 2018 Net liabilities recognized in 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 $ 3,114 $ 2,428 $ 686 $ 610 $ — $ 76 Foreign exchange contracts 5,026 3,862 1,164 351 — 813 Equity and other contracts 125 80 45 44 — 1 Total derivatives subject to netting arrangements 8,265 6,370 1,895 1,005 — 890 Total derivatives not subject to netting arrangements 666 — 666 — — 666 Total derivatives 8,931 6,370 2,561 1,005 — 1,556 Repurchase agreements 45,316 36,766 (b) 8,550 8,550 — — Securities lending 1,706 — 1,706 1,627 — 79 Total $ 55,953 $ 43,136 $ 12,817 $ 11,182 $ — $ 1,635 Offsetting of derivative liabilities and financial liabilities at Dec. 31, 2017 Net liabilities recognized in 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 $ 6,810 $ 5,495 $ 1,315 $ 1,222 $ — $ 93 Foreign exchange contracts 4,765 3,221 1,544 177 — 1,367 Equity and other contracts 143 81 62 58 — 4 Total derivatives subject to netting arrangements 11,718 8,797 2,921 1,457 — 1,464 Total derivatives not subject to netting arrangements 655 — 655 — — 655 Total derivatives 12,373 8,797 3,576 1,457 — 2,119 Repurchase agreements 33,908 25,848 (b) 8,060 8,059 — 1 Securities lending 2,186 — 2,186 2,091 — 95 Total $ 48,467 $ 34,645 $ 13,822 $ 11,607 $ — $ 2,215 (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 table presents 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 June 30, 2018 Dec. 31, 2017 Remaining contractual maturity Total Remaining contractual maturity Total (in millions) Overnight and continuous Up to 30 days 30 days or more Overnight and continuous Up to 30 days 30 days or more Repurchase agreements: U.S. Treasury $ 37,761 $ 1 $ — $ 37,762 $ 26,883 $ 11 $ — $ 26,894 U.S. government agencies 493 113 — 606 570 180 — 750 Agency RMBS 2,503 186 18 2,707 2,574 109 — 2,683 Corporate bonds 716 — 1,368 2,084 373 — 1,052 1,425 Other debt securities 315 — 913 1,228 253 — 731 984 Equity securities 428 — 501 929 655 — 517 1,172 Total $ 42,216 $ 300 $ 2,800 $ 45,316 $ 31,308 $ 300 $ 2,300 $ 33,908 Securities lending: U.S. government agencies $ 39 $ — $ — $ 39 $ 72 $ — $ — $ 72 Other debt securities 434 — — 434 316 — — 316 Equity securities 1,233 — — 1,233 1,798 — — 1,798 Total $ 1,706 $ — $ — $ 1,706 $ 2,186 $ — $ — $ 2,186 Total borrowings $ 43,922 $ 300 $ 2,800 $ 47,022 $ 33,494 $ 300 $ 2,300 $ 36,094 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.

Commitments and contingent liab

Commitments and contingent liabilities	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingent liabilities	Commitments and contingent liabilities Off-balance sheet arrangements 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 risks not recognized on the balance sheet. Our off-balance sheet risks are managed and monitored in manners similar to those used for on-balance sheet risks. The following table presents a summary of our off-balance sheet credit risks. Off-balance sheet credit risks June 30, 2018 Dec. 31, 2017 (in millions) Lending commitments $ 49,633 $ 51,467 Standby letters of credit (a) 3,055 3,531 Commercial letters of credit 114 122 Securities lending indemnifications (b)(c) 465,013 432,084 (a) Net of participations totaling $581 million at June 30, 2018 and $672 million at Dec. 31, 2017 . (b) Excludes the indemnification for securities for which BNY Mellon acts as an agent on behalf of CIBC Mellon clients, which totaled $68 billion at June 30, 2018 and $69 billion at Dec. 31, 2017 . (c) Includes cash collateral, invested in indemnified repurchase agreements, held by us as securities lending agent of $40 billion at June 30, 2018 and $33 billion at Dec. 31, 2017 . 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 lending 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: $28.9 billion in less than one year, $20.6 billion in one to five years and $123 million over five years. SBLCs principally support obligations of corporate clients and were collateralized with cash and securities of $138 million at June 30, 2018 and $160 million at Dec. 31, 2017 . At June 30, 2018 , $2.2 billion of the SBLCs will expire within one year and $889 million 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 SBLCs and foreign and other guarantees, if any, is included in the allowance for lending-related commitments. The allowance for lending-related commitments was $109 million at June 30, 2018 and $102 million at Dec. 31, 2017 . 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 June 30, 2018 Dec. 31, 2017 Investment grade 87 % 84 % Non-investment grade 13 % 16 % 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 $114 million at June 30, 2018 and $122 million at Dec. 31, 2017 . We expect many of the lending commitments and letters of credit 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. 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. 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 $487 billion at June 30, 2018 and $451 billion at Dec. 31, 2017 . 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 June 30, 2018 and Dec. 31, 2017 , $68 billion and $69 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 $72 billion and $73 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. Industry concentrations We have significant industry concentrations related to credit exposure at June 30, 2018 . The tables below present our credit exposure in the financial institutions and commercial portfolios. Financial institutions portfolio exposure (in billions) June 30, 2018 Loans Unfunded commitments Total exposure Securities industry $ 3.4 $ 18.8 $ 22.2 Asset managers 1.4 6.3 7.7 Banks 6.0 1.2 7.2 Insurance 0.1 3.3 3.4 Government 0.1 0.7 0.8 Other 0.8 1.3 2.1 Total $ 11.8 $ 31.6 $ 43.4 Commercial portfolio exposure (in billions) June 30, 2018 Loans Unfunded commitments Total exposure Manufacturing $ 1.2 $ 5.4 $ 6.6 Services and other 0.7 5.5 6.2 Energy and utilities 0.4 4.6 5.0 Media and telecom 0.2 1.1 1.3 Total $ 2.5 $ 16.6 $ 19.1 Major concentrations in securities lending are primarily to broker-dealers and are generally collateralized with cash and/or securities. 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. 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 June 30, 2018 and Dec. 31, 2017 , 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. Any ancillary costs that occur as a result of any mark-to-market loss cannot be quantified. In addition, we also sponsor clients as members on clearing and settlement exchanges and guarantee their obligations. At June 30, 2018 and Dec. 31, 2017 , 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 $940 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 249 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. On July 12, 2018, a federal district court dismissed six of the individual lawsuits. A series of FINRA arbitration proceedings also have been initiated by alleged purchasers asserting similar claims. 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, Associacão dos Profissionais dos Correiros (“ADCAP”), 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, and ADCAP has appealed that decision. 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 was transferred to São Paulo and then returned to Brasilia. On Jan. 16, 2018, the Brazilian Federal Prosecution Service (“MPF”) filed a civil lawsuit in São Paulo against DTVM alleging liability for Postalis losses based on alleged failures by DTVM to properly perform certain duties while acting as administrator to certain funds in which Postalis invested or controller of Postalis’s own investment portfolio. On April 18, 2018, the court dismissed the lawsuit without prejudice, and the MPF has appealed that decision. Depositary Receipt Litigation 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. Depositary Receipt Pre-Release Inquiry In March 2014, the Staff of the U.S. Securities and Exchange Commission’s Enforcement Division (the “Staff”) commenced an investigation into certain issuers of American Depositary Receipts (“ADRs”), including BNY Mellon, for the period of 2011 to 2015. The Staff has issued several requests to BNY Mellon for information relating to the pre-release of ADRs. In May 2017, BNY Mellon began discussions with the Staff about a possible resolution of the investigation. BNY Mellon has fully cooperated with this matter and negotiations are ongoing.

Lines of business

Lines of business	6 Months Ended
	Jun. 30, 2018
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. There were no significant organizational changes in the second quarter of 2018 . The results are also subject to refinements in revenue and expense allocation methodologies, which are typically reflected on a prospective basis. The accounting policies of the businesses are the same as those described in Note 1 of the Notes to Consolidated Financial Statements in our 2017 Annual Report. The primary products and services and types of revenue for our two principal businesses and a description of the Other segment are presented below. Investment Services business Line of business Primary products and services Primary types of revenue Asset Servicing Custody, accounting, ETF services, middle-office solutions, transfer agency, services for private equity and real estate funds, foreign exchange, securities lending, liquidity/lending services, prime brokerage and data analytics - Asset servicing fees (includes securities lending revenue) - Foreign exchange revenue - Net interest revenue - Financing-related fees Pershing Clearing and custody, investment, wealth and retirement solutions, technology and enterprise data management, trading services and prime brokerage - Clearing services fees Issuer Services Corporate Trust (trustee, administration and agency services and reporting and transparency) and Depositary Receipts (issuer services and support for brokers and investors) - Issuer services fees - Net interest revenue - Foreign exchange revenue Treasury Services Integrated cash management solutions including payments, foreign exchange, liquidity management, receivables processing and payables management and trade finance and processing - Treasury services fees Clearance and Collateral Management U.S. government clearing, global collateral management and tri-party repo - Asset servicing fees - Net interest revenue Investment Management business Line of business Primary products and services Primary types of revenue Asset Management Diversified investment management strategies and distribution of investment products - Investment management fees Wealth Management Investment management, custody, wealth and estate planning and private banking services - Investment management fees Other segment Description Primary types of revenue Includes leasing portfolio, corporate treasury activities, including our securities portfolio, derivatives and other trading activity, corporate and bank-owned life insurance, renewable energy investments and business exits - Net interest revenue - Investment and other income - Net gain (loss) on securities - Other trading revenue 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. • Incentives 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 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 securities portfolio. We typically allocate all interest revenue to the businesses generating the deposits. Accordingly, accretion related to the portion of the securities portfolio restructured in 2009 has been included in the results of the businesses. • 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 present the contribution of our businesses to our overall profitability. For the quarter ended June 30, 2018 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 2,233 $ 941 (a) $ 41 $ 3,215 (a) Net interest revenue (expense) 874 77 (35 ) 916 Total revenue 3,107 1,018 (a) 6 4,131 (a) Provision for credit losses 1 2 (6 ) (3 ) Noninterest expense 1,967 697 81 2,745 (b) Income (loss) before taxes $ 1,139 $ 319 (a) $ (69 ) $ 1,389 (a)(b) Pre-tax operating margin (c) 37 % 31 % N/M 34 % Average assets $ 264,387 $ 31,504 $ 50,437 $ 346,328 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of $5 million , representing $12 million of income and noncontrolling interests of $7 million . Income before taxes is net of noncontrolling interests of $7 million . (b) Noninterest expense includes a loss attributable to noncontrolling interests of $2 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the quarter ended March 31, 2018 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 2,250 $ 1,012 (a) $ 8 $ 3,270 (a) Net interest revenue (expense) 844 76 (1 ) 919 Total revenue 3,094 1,088 (a) 7 4,189 (a) Provision for credit losses (7 ) 2 — (5 ) Noninterest expense 1,949 705 87 2,741 (b) Income (loss) before taxes $ 1,152 $ 381 (a) $ (80 ) $ 1,453 (a)(b) Pre-tax operating margin (c) 37 % 35 % N/M 35 % Average assets $ 278,095 $ 31,963 $ 48,117 $ 358,175 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of less than $1 million , representing $11 million of losses and a loss attributable to noncontrolling interests of $11 million . Income before taxes is net of a loss attributable to noncontrolling interests of $11 million . (b) Noninterest expense includes income attributable to noncontrolling interests of $2 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the quarter ended June 30, 2017 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 2,115 $ 899 (a) $ 113 $ 3,127 (a) Net interest revenue (expense) 761 87 (22 ) 826 Total revenue 2,876 986 (a) 91 3,953 (a) Provision for credit losses (3 ) — (4 ) (7 ) Noninterest expense 1,927 698 28 2,653 (b) Income before taxes $ 952 $ 288 (a) $ 67 $ 1,307 (a)(b) Pre-tax operating margin (c) 33 % 29 % N/M 33 % Average assets $ 254,724 $ 31,355 $ 56,436 $ 342,515 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of $7 million , representing $10 million of income and noncontrolling interests of $3 million . Income before taxes is net of noncontrolling interests of $3 million . (b) Noninterest expense includes a loss attributable to noncontrolling interests of $2 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the six months ended June 30, 2018 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 4,483 $ 1,953 (a) $ 49 $ 6,485 (a) Net interest revenue (expense) 1,718 153 (36 ) 1,835 Total revenue 6,201 2,106 (a) 13 8,320 (a) Provision for credit losses (6 ) 4 (6 ) (8 ) Noninterest expense 3,916 1,402 168 5,486 Income (loss) before taxes $ 2,291 $ 700 (a) $ (149 ) $ 2,842 (a) Pre-tax operating margin (b) 37 % 33 % N/M 34 % Average assets $ 271,203 $ 31,732 $ 49,284 $ 352,219 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of $5 million , representing $1 million of income and a loss attributable to noncontrolling interests of $4 million . Income before taxes is net of a loss attributable to noncontrolling interests of $4 million . (b) Income before taxes divided by total revenue. N/M - Not meaningful. For the six months ended June 30, 2017 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 4,199 $ 1,776 (a) $ 185 $ 6,160 (a) Net interest revenue (expense) 1,468 173 (23 ) 1,618 Total revenue 5,667 1,949 (a) 162 7,778 (a) Provision for credit losses (3 ) 3 (12 ) (12 ) Noninterest expense 3,776 1,381 135 5,292 (b) Income before taxes $ 1,894 $ 565 (a) $ 39 $ 2,498 (a)(b) Pre-tax operating margin (c) 33 % 29 % N/M 32 % Average assets $ 253,031 $ 31,212 $ 55,132 $ 339,375 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of $22 million , representing $43 million of income and noncontrolling interests of $21 million . Income before taxes is net of noncontrolling interests of $21 million . (b) Noninterest expense includes a loss attributable to noncontrolling interest of $5 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	6 Months Ended
	Jun. 30, 2018
Supplemental Cash Flow Information [Abstract]
Supplemental information to the Consolidated Statement of Cash Flows	Supplemental information to the Consolidated Statement of Cash Flows Non-cash investing and financing transactions that, appropriately, are not reflected in the consolidated statement of cash flows are listed below. Non-cash investing and financing transactions Six months ended June 30, (in millions) 2018 2017 Transfers from loans to other assets for other real estate owned $ 2 $ 2 Change in assets of consolidated VIEs 303 529 Change in liabilities of consolidated VIEs 1 293 Change in nonredeemable noncontrolling interests of consolidated investment management funds 264 275 Securities purchased not settled 400 853 Securities sold not settled — 1 Securities matured not settled 25 — Available-for-sale securities transferred to trading assets 963 — Held-to-maturity securities transferred to available-for-sale 1,087 — Premises and equipment/capitalized software funded by capital lease obligations 15 345

Basis of presentation (Policies

Basis of presentation (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
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, 2017 . Certain immaterial reclassifications have been made to prior periods to place them on a basis comparable with current period presentation.
Use Of Estimates	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 allowance for loan losses and lending-related commitments, 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 securities, goodwill and intangible assets and establishment of allowances for loan losses and lending-related commitments as well as changes in pension and postretirement expense.
New Accounting Guidance	Accounting changes and new accounting guidance The following accounting changes and new accounting guidance were adopted in the first quarter of 2018. ASU 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities In August 2017, the FASB issued an ASU, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities . The objective of this ASU is to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities and to simplify the application of hedge accounting guidance. The most significant impact of the new guidance to the Company relates to the new accounting alternatives for fair value hedges of interest rate risk, specifically, the ability to hedge only the benchmark component of the contractual cash flows and partial-term hedging. The guidance also changed presentation and disclosure requirements and made changes to how the shortcut method is applied, which resulted in the Company using that method going forward for certain hedging relationships. BNY Mellon elected to early adopt this ASU on Jan. 31, 2018, which is the “as of” date for which the Company was permitted to make certain elections and the measurement date for recording the adoption impact for certain hedge modifications. As part of the adoption, we elected to reclassify approximately $1.1 billion of debt securities from held-to-maturity to available-for-sale which resulted in a decrease of $47 million pre-tax to accumulated other comprehensive income. The Company also elected to modify certain hedge relationships as of the adoption date primarily to utilize the benchmark component method of measuring hedge effectiveness, as such method is deemed to more closely match risk management objectives with accounting results. The Company recognized a $27 million after-tax increase in retained earnings as of Jan. 1, 2018 associated with the adoption impact of these hedge modifications. ASU 2017-07, Compensation-Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost In March 2017, the FASB issued an ASU, Compensation-Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost . The ASU requires the disaggregation of the service cost component from the other components of the net benefit cost in the income statement. The ASU also permits only the service cost component of net benefit cost to be eligible for capitalization. BNY Mellon adopted this ASU in the first quarter of 2018, and applied the guidance retrospectively for the presentation of the service cost component and the other components in the income statement, and prospectively for the capitalization of the service cost component in assets. The adoption of this standard increased staff expense and decreased other expense by $16 million for the second quarter of 2017 and $32 million for the first six months of 2017. ASU 2016-18, Statement of Cash Flows: Restricted Cash In November 2016, the FASB issued an ASU, Statement of Cash Flows: Restricted Cash . This ASU provides guidance on the presentation of restricted cash or restricted cash equivalents in the statement of cash flows. Restricted cash consists of excess client funds held by our broker-dealer business and totaled $1.7 billion at June 30, 2018 and $3.2 billion at June 30, 2017. Restricted cash is included in interest-bearing deposits with banks on the consolidated balance sheet and with cash and due from banks when reconciling the beginning and end-of-period balances on the consolidated cash flow statement. We adopted the guidance in this ASU retrospectively. As a result, the change in interest-bearing deposits with banks, which is included in investing activities on the consolidated statement of cash flows, was restated to reflect the decrease in restricted cash of $221 million for the six months ended June 30, 2017. The change in restricted cash was a $92 million decrease for the six months ended June 30, 2018. ASU 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments In August 2016, the FASB issued an ASU, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments . This ASU provides guidance on eight specific cash flow presentation issues. The most significant impact for BNY Mellon relates to distributions received from equity method investees. For equity method investments, BNY Mellon elected to report distributions received from equity method investees using the cumulative earnings approach. Distributions received are considered returns on investment and classified as cash inflows from operating activities on the consolidated cash flows statement. To the extent the returns on investment exceeded the cumulative equity in earnings recognized, the excess would be considered a return of investment and classified as cash inflows from investing activities on the consolidated cash flows statement. We adopted the guidance in this ASU retrospectively. As a result, the change in accruals and other, net, which is included in operating activities on the consolidated cash flows statement, was restated to reflect distributions received of $19 million for the six months ended June 30, 2017 . These distributions were previously included in other, net in investing activities on the consolidated cash flows statement. Distributions received for the six months ended June 30, 2018 were $19 million . The remaining seven specific cash flow presentation issues do not materially impact BNY Mellon. ASU 2014-09, Revenue from Contracts with Customers In May 2014, the FASB issued an ASU, Revenue from Contracts with Customers . This ASU, as amended, provides guidance on the recognition of revenue related to the transfer of promised goods or services to customers and guidance on accounting for certain contract costs. The standard provides a single revenue model to be applied by reporting companies under U.S. GAAP and supersedes most existing revenue recognition guidance. The Company adopted the guidance on Jan. 1, 2018 using the cumulative effect transition method applied to contracts not completed as of Dec. 31, 2017, which resulted in a $55 million after-tax reduction to retained earnings. The comparative financial information for 2017 has not been restated and continues to be reported under the accounting standards in effect for that period. Although the impact of the adoption of this ASU was not material, the most significant changes and quantitative impact of the changes are disclosed below. Payments to customers The timing of recognizing the reduction in revenue for certain payments made to depositary receipts customers has changed. Prior to adoption, annual payments to customers were capitalized and amortized as contra revenue over the remaining contract period, subject to impairment reviews. Under the new guidance, annual payments are recorded as a reduction in revenue in proportion to the expected annual revenue generated from the related customer contract. Costs to obtain a customer contract Prior to adoption, costs to obtain a customer contract, primarily sales incentives, were expensed as incurred. Under the new guidance, an asset is recognized for the incremental sales incentives that are considered costs of obtaining a contract with a customer, if those costs are expected to be recovered. The table below presents the cumulative effect of the adoption of the new guidance on the consolidated balance sheet as of Dec. 31, 2017 . Impact on the consolidated balance sheet Dec. 31, 2017 Impact of adoption Jan. 1, 2018 (in millions) Assets Other assets $ 23,029 $ (9 ) $ 23,020 Liabilities Accrued tax and other expenses $ 6,225 $ (18 ) $ 6,207 Other liabilities 6,050 64 6,114 Equity Retained earnings $ 25,635 $ (55 ) $ 25,580 The impact of the new guidance on the consolidated income statement for the second quarter of 2018 and the first six months of 2018, and consolidated balance sheet as of June 30, 2018 , was de minimis. See Note 8 for additional revenue and contract costs disclosures. ASU 2016-01, Financial Instruments—Overall: Recognition and Measurement of Financial Assets and Financial Liabilities In January 2016, the FASB issued an ASU, Financial Instruments—Overall: Recognition and Measurement of Financial Assets and Financial Liabilities . The ASU requires investments in equity securities that do not result in consolidation and are not accounted for under the equity method to be measured at fair value with changes in the fair value recognized through net income, unless one of two available exceptions applies. The first exception, a scope exception, allows Federal Reserve Bank stock, FHLB stock and exchange memberships to remain accounted for at cost, less impairment. The second practicability exception is an election available for equity investments that do not have readily determinable fair values. For certain investments where the Company has chosen the practicability exception, such investments are accounted for at cost adjusted for impairment, if any, plus or minus observable price changes. The Company adopted this guidance in the first quarter of 2018 using the cumulative effect method of adoption, with a de minimis impact to retained earnings. As part of the adoption, we reclassified money market fund investments of approximately $1 billion to trading assets, primarily from available-for-sale securities. We have non-readily marketable equity securities where we are utilizing the practicability exception of $53 million at June 30, 2018 and $47 million at March 31, 2018. We recognized upward adjustments on these securities of $5 million in the second quarter of 2018 and $20 million in the first quarter of 2018. Both upward adjustments were driven by activity that resulted in observable price changes.
Other-than-temporary impairment	Other-than-temporary impairment We 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 and 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.
Contract revenue	Contract revenue Significant accounting policy Revenue is based on terms specified in a contract with a customer, and excludes any amounts collected on behalf of third parties. Revenue is recognized when, or as, a performance obligation is satisfied by transferring control of a good or service to a customer. A performance obligation may be satisfied over time or at a point in time. Revenue from a performance obligation satisfied over time is recognized by measuring our progress in satisfying the performance obligation in a manner that reflects the transfer of goods and services to the customer. Revenue from a performance obligation satisfied at a point in time is recognized at the point in time the customer obtains control of the promised good or service. The amount of revenue recognized reflects the consideration we expect to be entitled to in exchange for the promised goods and services. Taxes assessed by a governmental authority, that are both imposed on, and concurrent with, a specific revenue-producing transaction, are collected from a customer and are excluded from revenue. Nature of services and revenue recognition Fee revenue in Investment Services and Investment Management is primarily variable, based on levels of AUC/A, AUM and the level of client-driven transactions, as specified in fee schedules. Investment Services fees are based primarily on the market value of AUC/A; client accounts, balances and the volume of transactions; securities lending volume and spreads; and fees for other services. Certain fees based on the market value of assets are calculated in arrears on a monthly or quarterly basis. Substantially all services within the Investment Services business are provided over time. Revenue on these services is recognized using the time elapsed method, equal to the expected invoice amount, which typically represents the value provided to the customer for our performance completed to date. Trade execution and clearing services are delivered at a point-in-time, based on customer actions. Revenue for trade execution and clearing services is recognized on trade date, which is consistent with the time that the service was provided. Customers are generally billed for services on a monthly or quarterly basis. Investment management fees are dependent on the overall level and mix of AUM. The management fees, expressed in basis points, are charged for managing those assets. Management fees are typically subject to fee schedules based on the overall level of assets managed and products in which those assets are invested. Investment management fee revenue also includes transactional- and account-based fees. These fees along with distribution and servicing fees are recognized when the services have been complete. Clients are generally billed for services performed on a monthly or quarterly basis. Performance fees are generally calculated as a percentage of the applicable portfolio’s performance in excess of a benchmark index or a peer group’s performance. Performance fees are recognized at the end of the measurement period when they are determinable.
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 2017 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 June 30, 2018 and Dec. 31, 2017 , 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.

Accounting change and new accou

Accounting change and new accounting guidance (Tables)	6 Months Ended
	Jun. 30, 2018
Accounting Changes and Error Corrections [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The table below presents the cumulative effect of the adoption of the new guidance on the consolidated balance sheet as of Dec. 31, 2017 . Impact on the consolidated balance sheet Dec. 31, 2017 Impact of adoption Jan. 1, 2018 (in millions) Assets Other assets $ 23,029 $ (9 ) $ 23,020 Liabilities Accrued tax and other expenses $ 6,225 $ (18 ) $ 6,207 Other liabilities 6,050 64 6,114 Equity Retained earnings $ 25,635 $ (55 ) $ 25,580

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2018
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 June 30, 2018 and Dec. 31, 2017 , respectively. Securities at June 30, 2018 Gross unrealized Amortized cost Fair value (in millions) Gains Losses Available-for-sale: U.S. Treasury $ 19,063 $ 99 $ 307 $ 18,855 U.S. government agencies 1,481 — 34 1,447 State and political subdivisions 2,636 23 29 2,630 Agency RMBS 25,159 89 445 24,803 Non-agency RMBS (a) 1,229 285 7 1,507 Non-agency commercial MBS 1,403 1 26 1,378 Agency commercial MBS 9,775 11 220 9,566 CLOs 3,179 4 6 3,177 Foreign covered bonds 2,898 13 18 2,893 Corporate bonds 1,167 9 30 1,146 Sovereign debt/sovereign guaranteed 11,986 136 36 12,086 Other debt securities 4,470 5 23 4,452 Total securities available-for-sale (b) $ 84,446 $ 675 $ 1,181 $ 83,940 Held-to-maturity: U.S. Treasury $ 5,043 $ 2 $ 116 $ 4,929 U.S. government agencies 1,803 — 17 1,786 State and political subdivisions 17 — 1 16 Agency RMBS 25,747 10 818 24,939 Non-agency RMBS 111 4 1 114 Agency commercial MBS 1,321 — 46 1,275 Foreign covered bonds 82 1 — 83 Sovereign debt/sovereign guaranteed 990 29 — 1,019 Other debt securities 27 — — 27 Total securities held-to-maturity $ 35,141 $ 46 $ 999 $ 34,188 Total securities $ 119,587 $ 721 $ 2,180 $ 118,128 (a) Includes $943 million that were included in the former Grantor Trust. (b) Includes gross unrealized gains of $44 million and gross unrealized losses of $100 million recorded in accumulated other comprehensive income related to 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, 2017 Gross unrealized Amortized cost Fair value (in millions) Gains Losses Available-for-sale: U.S. Treasury $ 15,159 $ 264 $ 160 $ 15,263 U.S. government agencies 917 1 10 908 State and political subdivisions 2,949 31 23 2,957 Agency RMBS 24,002 108 291 23,819 Non-agency RMBS (a) 1,265 317 4 1,578 Other RMBS 152 3 6 149 Non-agency commercial MBS 1,360 6 6 1,360 Agency commercial MBS 8,793 36 67 8,762 CLOs 2,898 12 1 2,909 Other asset-backed securities 1,040 3 — 1,043 Foreign covered bonds 2,520 18 9 2,529 Corporate bonds 1,249 17 11 1,255 Sovereign debt/sovereign guaranteed 12,405 175 23 12,557 Other debt securities 3,494 9 12 3,491 Money market funds 963 — — 963 Total securities available-for-sale (b) $ 79,166 $ 1,000 $ 623 $ 79,543 Held-to-maturity: U.S. Treasury $ 9,792 $ 6 $ 56 $ 9,742 U.S. government agencies 1,653 — 12 1,641 State and political subdivisions 17 — 1 16 Agency RMBS 26,208 51 332 25,927 Non-agency RMBS 57 5 — 62 Other RMBS 65 — 1 64 Non-agency commercial MBS 6 — — 6 Agency commercial MBS 1,324 2 9 1,317 Foreign covered bonds 84 2 — 86 Sovereign debt/sovereign guaranteed 1,593 30 — 1,623 Other debt securities 28 — — 28 Total securities held-to-maturity $ 40,827 $ 96 $ 411 $ 40,512 Total securities $ 119,993 $ 1,096 $ 1,034 $ 120,055 (a) Includes $1,091 million that were included in the former Grantor Trust. (b) Includes gross unrealized gains of $50 million and gross unrealized losses of $144 million recorded in accumulated other comprehensive income related to 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 realized gains, losses and impairments, on a gross basis. Net securities gains (losses) (in millions) 2Q18 1Q18 2Q17 YTD18 YTD17 Realized gross gains $ 2 $ 2 $ 3 $ 4 $ 14 Realized gross losses (1 ) (51 ) (2 ) (52 ) (2 ) Recognized gross impairments — — (1 ) — (2 ) Total net securities gains (losses) $ 1 $ (49 ) $ — $ (48 ) $ 10
Aggregate Fair Value of Investments with Continuous Unrealized Loss Position	The following tables show the aggregate fair value of securities 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 June 30, 2018 and Dec. 31, 2017 , respectively. Temporarily impaired securities at June 30, 2018 Less than 12 months 12 months or more Total Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses (in millions) Available-for-sale: U.S. Treasury $ 10,447 $ 140 $ 3,550 $ 167 $ 13,997 $ 307 U.S. government agencies 1,140 29 119 5 1,259 34 State and political subdivisions 488 6 470 23 958 29 Agency RMBS 10,909 209 4,821 236 15,730 445 Non-agency RMBS (a) 96 3 156 4 252 7 Non-agency commercial MBS 955 21 115 5 1,070 26 Agency commercial MBS 5,541 159 1,062 61 6,603 220 CLOs 1,292 6 45 — 1,337 6 Foreign covered bonds 1,197 12 281 6 1,478 18 Corporate bonds 707 28 49 2 756 30 Sovereign debt/sovereign guaranteed 2,647 23 626 13 3,273 36 Other debt securities 2,519 15 409 8 2,928 23 Total securities available-for-sale (b) $ 37,938 $ 651 $ 11,703 $ 530 $ 49,641 $ 1,181 Held-to-maturity: U.S. Treasury $ 3,591 $ 80 $ 1,136 $ 36 $ 4,727 $ 116 U.S. government agencies 554 10 856 7 1,410 17 State and political subdivisions — — 4 1 4 1 Agency RMBS 14,697 428 8,805 390 23,502 818 Non-agency RMBS 36 — 24 1 60 1 Agency commercial MBS 1,217 42 57 4 1,274 46 Total securities held-to-maturity $ 20,095 $ 560 $ 10,882 $ 439 $ 30,977 $ 999 Total temporarily impaired securities $ 58,033 $ 1,211 $ 22,585 $ 969 $ 80,618 $ 2,180 (a) Includes $15 million with an unrealized loss of $1 million for less than 12 months and $5 million with an unrealized loss of less than $1 million for 12 months or more that were included in the former Grantor Trust. (b) Includes gross unrealized losses of $100 million for 12 months or more recorded in accumulated other comprehensive income related to 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, 2017 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 $ 7,429 $ 131 $ 2,175 $ 29 $ 9,604 $ 160 U.S. government agencies 588 6 160 4 748 10 State and political subdivisions 732 3 518 20 1,250 23 Agency RMBS 8,567 66 5,834 225 14,401 291 Non-agency RMBS (a) 20 — 149 4 169 4 Other RMBS 71 4 45 2 116 6 Non-agency commercial MBS 476 3 122 3 598 6 Agency commercial MBS 3,077 28 1,332 39 4,409 67 CLOs 260 1 — — 260 1 Foreign covered bonds 953 7 116 2 1,069 9 Corporate bonds 274 2 288 9 562 11 Sovereign debt/sovereign guaranteed 1,880 12 559 11 2,439 23 Other debt securities 1,855 7 368 5 2,223 12 Total securities available-for-sale (b) $ 26,182 $ 270 $ 11,666 $ 353 $ 37,848 $ 623 Held-to-maturity: U.S. Treasury $ 6,389 $ 41 $ 2,909 $ 15 $ 9,298 $ 56 U.S. government agencies 791 4 850 8 1,641 12 State and political subdivisions — — 4 1 4 1 Agency RMBS 9,458 81 12,305 251 21,763 332 Other RMBS — — 50 1 50 1 Agency commercial MBS 737 7 60 2 797 9 Total securities held-to-maturity $ 17,375 $ 133 $ 16,178 $ 278 $ 33,553 $ 411 Total temporarily impaired securities $ 43,557 $ 403 $ 27,844 $ 631 $ 71,401 $ 1,034 (a) Includes $7 million with an unrealized loss of less than $1 million for less than 12 months and $12 million with an unrealized loss of $1 million for 12 months or more that were included in the former Grantor Trust. (b) Includes gross unrealized losses of $144 million for 12 months or more recorded in accumulated other comprehensive income related to 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 securities portfolio. Maturity distribution and yields on securities at June 30, 2018 U.S. Treasury U.S. government agencies State and political subdivisions Other bonds, notes and debentures Mortgage/ asset-backed (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 $ 6,518 1.82 % $ 40 2.17 % $ 438 2.14 % $ 5,444 1.22 % $ — — % $ 12,440 Over 1 through 5 years 6,395 1.97 454 2.18 1,352 2.94 12,364 1.17 — — 20,565 Over 5 through 10 years 2,556 2.21 953 2.72 645 2.67 2,322 0.84 — — 6,476 Over 10 years 3,386 3.11 — — 195 2.87 192 1.66 — — 3,773 Mortgage-backed securities — — — — — — — — 37,254 3.11 37,254 Asset-backed securities — — — — — — — — 3,432 3.03 3,432 Total $ 18,855 2.16 % $ 1,447 2.53 % $ 2,630 2.74 % $ 20,322 1.18 % $ 40,686 3.11 % $ 83,940 Securities held-to-maturity: One year or less $ 577 1.18 % $ 631 1.18 % $ — — % $ 136 0.83 % $ — — % $ 1,344 Over 1 through 5 years 3,807 1.81 1,172 2.23 2 5.66 442 0.46 — — 5,423 Over 5 through 10 years 659 1.78 — — 1 5.78 521 0.85 — — 1,181 Over 10 years — — — — 14 4.76 — — — — 14 Mortgage-backed securities — — — — — — — — 27,179 2.85 27,179 Total $ 5,043 1.74 % $ 1,803 1.86 % $ 17 4.94 % $ 1,099 0.69 % $ 27,179 2.85 % $ 35,141 (a) Yields are based upon the amortized cost of securities.
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 securities portfolio in 2009, at June 30, 2018 and Dec. 31, 2017 . See Note 15 for carrying values of these securities. Projected weighted-average default rates and loss severities June 30, 2018 Dec. 31, 2017 Default rate Severity Default rate Severity Alt-A 21 % 52 % 22 % 53 % Subprime 36 % 65 % 38 % 66 % Prime 12 % 40 % 13 % 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) 2Q18 1Q18 2Q17 YTD18 YTD17 Agency RMBS $ — $ (42 ) $ — $ (42 ) $ 1 U.S. Treasury — (4 ) (1 ) (4 ) (1 ) Non-agency RMBS — — — — (1 ) Other 1 (3 ) 1 (2 ) 11 Total net securities gains (losses) $ 1 $ (49 ) $ — $ (48 ) $ 10
Debt Securities Credit Losses Roll Forward Recorded in Earnings	The following tables reflect 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) 2Q18 2Q17 Beginning balance as of March 31 $ 80 $ 89 Add: Initial OTTI credit losses — — Subsequent OTTI credit losses — 1 Less: Realized losses for securities sold 1 5 Ending balance as of June 30 $ 79 $ 85 Debt securities credit loss roll forward (in millions) YTD18 YTD17 Beginning balance as of Dec. 31 $ 84 $ 88 Add: Initial OTTI credit losses — — Subsequent OTTI credit losses — 2 Less: Realized losses for securities sold 5 5 Ending balance as of June 30 $ 79 $ 85

Loans and asset quality (Tables

Loans and asset quality (Tables)	6 Months Ended
	Jun. 30, 2018
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 June 30, 2018 and Dec. 31, 2017 . Loans June 30, 2018 Dec. 31, 2017 (in millions) Domestic: Commercial $ 2,117 $ 2,744 Commercial real estate 4,974 4,900 Financial institutions 5,526 5,568 Lease financings 758 772 Wealth management loans and mortgages 16,191 16,420 Other residential mortgages 653 708 Overdrafts 1,090 963 Other 1,169 1,131 Margin loans 14,914 15,689 Total domestic 47,392 48,895 Foreign: Commercial 336 167 Commercial real estate 5 — Financial institutions 6,304 7,483 Lease financings 539 527 Wealth management loans and mortgages 110 108 Other (primarily overdrafts) 2,947 4,264 Margin loans 143 96 Total foreign 10,384 12,645 Total loans (a) $ 57,776 $ 61,540 (a) Net of unearned income of $375 million at June 30, 2018 and $394 million at Dec. 31, 2017 primarily related to 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 June 30, 2018 Wealth management loans and mortgages Other residential mortgages (in millions) Commercial Commercial real estate Financial institutions Lease financings All other Foreign Total Beginning balance $ 75 $ 75 $ 22 $ 7 $ 23 $ 19 $ — $ 35 $ 256 Charge-offs — — — — — — — — — Recoveries — — — — — 1 — — 1 Net recoveries — — — — — 1 — — 1 Provision 1 (1 ) 2 (1 ) — (2 ) — (2 ) (3 ) Ending balance $ 76 $ 74 $ 24 $ 6 $ 23 $ 18 $ — $ 33 $ 254 Allowance for: Loan losses $ 17 $ 55 $ 8 $ 6 $ 19 $ 18 $ — $ 22 $ 145 Lending-related commitments 59 19 16 — 4 — — 11 109 Individually evaluated for impairment: Loan balance $ — $ — $ — $ — $ 5 $ — $ — $ — $ 5 Allowance for loan losses — — — — — — — — — Collectively evaluated for impairment: Loan balance $ 2,117 $ 4,974 $ 5,526 $ 758 $ 16,186 $ 653 $ 17,173 (a) $ 10,384 $ 57,771 Allowance for loan losses 17 55 8 6 19 18 — 22 145 (a) Includes $1,090 million of domestic overdrafts, $14,914 million of margin loans and $1,169 million of other loans at June 30, 2018 . Allowance for credit losses activity for the quarter ended March 31, 2018 Wealth management loans and mortgages Other residential mortgages (in millions) Commercial Commercial real estate Financial institutions Lease financings All other Foreign Total Beginning balance $ 77 $ 76 $ 23 $ 8 $ 22 $ 20 $ — $ 35 $ 261 Charge-offs — — — — — — — — — Recoveries — — — — — — — — — Net recoveries — — — — — — — — — Provision (2 ) (1 ) (1 ) (1 ) 1 (1 ) — — (5 ) Ending balance $ 75 $ 75 $ 22 $ 7 $ 23 $ 19 $ — $ 35 $ 256 Allowance for: Loan losses $ 23 $ 58 $ 8 $ 7 $ 19 $ 19 $ — $ 22 $ 156 Lending-related commitments 52 17 14 — 4 — — 13 100 Individually evaluated for impairment: Loan balance $ — $ — $ 1 $ — $ 4 $ — $ — $ — $ 5 Allowance for loan losses — — — — 1 — — — 1 Collectively evaluated for impairment: Loan balance $ 2,284 $ 4,888 $ 5,781 $ 749 $ 16,284 $ 680 $ 16,867 (a) $ 13,271 $ 60,804 Allowance for loan losses 23 58 8 7 18 19 — 22 155 (a) Includes $785 million of domestic overdrafts, $14,993 million of margin loans and $1,089 million of other loans at March 31, 2018 . Allowance for credit losses activity for the quarter ended June 30, 2017 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 $ 73 $ 23 $ 10 $ 26 $ 25 $ — $ 37 $ 276 Charge-offs — — — — — — — — — Recoveries — — — — — 1 — — 1 Net recoveries — — — — — 1 — — 1 Provision (2 ) 2 — — (1 ) (3 ) — (3 ) (7 ) Ending balance $ 80 $ 75 $ 23 $ 10 $ 25 $ 23 $ — $ 34 $ 270 Allowance for: Loan losses $ 26 $ 55 $ 7 $ 10 $ 21 $ 23 $ — $ 23 $ 165 Lending-related commitments 54 20 16 — 4 — — 11 105 Individually evaluated for impairment: Loan balance $ — $ — $ 2 $ — $ 7 $ — $ — $ — $ 9 Allowance for loan losses — — 2 — 3 — — — 5 Collectively evaluated for impairment: Loan balance $ 2,580 $ 5,017 $ 5,952 $ 847 $ 16,024 $ 780 $ 15,950 (a) $ 14,514 $ 61,664 Allowance for loan losses 26 55 5 10 18 23 — 23 160 (a) Includes $855 million of domestic overdrafts, $13,973 million of margin loans and $1,122 million of other loans at June 30, 2017 . Allowance for credit losses activity for the six months ended June 30, 2018 Wealth management loans and mortgages Other All Foreign Total (in millions) Commercial Commercial Financial Lease Beginning balance $ 77 $ 76 $ 23 $ 8 $ 22 $ 20 $ — $ 35 $ 261 Charge-offs — — — — — — — — — Recoveries — — — — — 1 — — 1 Net recoveries — — — — — 1 — — 1 Provision (1 ) (2 ) 1 (2 ) 1 (3 ) — (2 ) (8 ) Ending balance $ 76 $ 74 $ 24 $ 6 $ 23 $ 18 $ — $ 33 $ 254 Allowance for credit losses activity for the six months ended June 30, 2017 Wealth management loans and mortgages Other All Foreign Total (in millions) Commercial Commercial Financial Lease Beginning balance $ 82 $ 73 $ 26 $ 13 $ 23 $ 28 $ — $ 36 $ 281 Charge-offs — — — — — (1 ) — — (1 ) Recoveries — — — — — 2 — — 2 Net recoveries — — — — — 1 — — 1 Provision (2 ) 2 (3 ) (3 ) 2 (6 ) — (2 ) (12 ) Ending balance $ 80 $ 75 $ 23 $ 10 $ 25 $ 23 $ — $ 34 $ 270
Distribution of Nonperforming Assets	The table below presents our nonperforming assets. Nonperforming assets (in millions) June 30, 2018 Dec. 31, 2017 Nonperforming loans: Other residential mortgages $ 71 $ 78 Wealth management loans and mortgages 8 7 Commercial real estate — 1 Total nonperforming loans 79 86 Other assets owned 3 4 Total nonperforming assets $ 82 $ 90
Information about Past Due Loans	The table below presents our past due loans. Past due loans and still accruing interest June 30, 2018 Dec. 31, 2017 Days past due Total past due Days past due Total past due (in millions) 30-59 60-89 ≥90 30-59 60-89 ≥90 Commercial real estate $ 104 $ 25 $ — $ 129 $ 44 $ — $ — $ 44 Wealth management loans and mortgages 17 1 — 18 39 5 — 44 Other residential mortgages 23 2 6 31 18 5 5 28 Financial institutions 24 — — 24 1 — — 1 Total past due loans $ 168 $ 28 $ 6 $ 202 $ 102 $ 10 $ 5 $ 117
Credit Quality Indicators - Commercial Portfolio - Credit Risk Profile by Creditworthiness Category	The following tables present information about credit quality indicators. Commercial loan portfolio Commercial loan portfolio – Credit risk profile by creditworthiness category Commercial Commercial real estate Financial institutions June 30, Dec. 31, 2017 June 30, Dec. 31, 2017 June 30, Dec. 31, 2017 (in millions) Investment grade $ 2,342 $ 2,685 $ 4,266 $ 4,277 $ 9,262 $ 10,021 Non-investment grade 111 226 713 623 2,568 3,030 Total $ 2,453 $ 2,911 $ 4,979 $ 4,900 $ 11,830 $ 13,051
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) June 30, Dec. 31, 2017 Wealth management loans: Investment grade $ 6,791 $ 7,042 Non-investment grade 145 185 Wealth management mortgages 9,365 9,301 Total $ 16,301 $ 16,528

Goodwill and intangible assets

Goodwill and intangible assets (Tables)	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Breakdown of Goodwill by Business	The tables below provide a breakdown of goodwill by business. Goodwill by business Investment Services Investment Management Other Consolidated (in millions) Balance at Dec. 31, 2017 $ 8,389 $ 9,128 $ 47 $ 17,564 Dispositions — (65 ) — (65 ) Foreign currency translation (31 ) (50 ) — (81 ) Balance at June 30, 2018 $ 8,358 $ 9,013 $ 47 $ 17,418 Goodwill by business Investment Services Investment Management Other Consolidated (in millions) Balance at Dec. 31, 2016 $ 8,269 $ 9,000 $ 47 $ 17,316 Foreign currency translation 72 69 — 141 Balance at June 30, 2017 $ 8,341 $ 9,069 $ 47 $ 17,457
Breakdown of Intangible Assets by Business	The tables below provide a breakdown of intangible assets by business. Intangible assets – net carrying amount by business Investment Services Investment Management Other Consolidated (in millions) Balance at Dec. 31, 2017 $ 888 $ 1,674 $ 849 $ 3,411 Amortization (72 ) (25 ) — (97 ) Foreign currency translation (1 ) (5 ) — (6 ) Balance at June 30, 2018 $ 815 $ 1,644 $ 849 $ 3,308 Intangible assets – net carrying amount by business Investment Services Investment Management Other Consolidated (in millions) Balance at Dec. 31, 2016 $ 1,032 $ 1,717 $ 849 $ 3,598 Amortization (75 ) (30 ) — (105 ) Foreign currency translation 3 10 — 13 Balance at June 30, 2017 $ 960 $ 1,697 $ 849 $ 3,506
Breakdown of Intangible Assets by Type	The table below provides a breakdown of intangible assets by type. Intangible assets June 30, 2018 Dec. 31, 2017 (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 contracts—Investment Services $ 2,255 $ (1,811 ) $ 444 10 years $ 2,260 $ (1,744 ) $ 516 Customer relationships—Investment Management 1,253 (1,030 ) 223 11 years 1,262 (1,015 ) 247 Other 29 (13 ) 16 4 years 42 (23 ) 19 Total subject to amortization 3,537 (2,854 ) 683 10 years 3,564 (2,782 ) 782 Not subject to amortization: (b) Tradenames 1,333 N/A 1,333 N/A 1,334 N/A 1,334 Customer relationships 1,292 N/A 1,292 N/A 1,295 N/A 1,295 Total not subject to amortization 2,625 N/A 2,625 N/A 2,629 N/A 2,629 Total intangible assets $ 6,162 $ (2,854 ) $ 3,308 N/A $ 6,193 $ (2,782 ) $ 3,411 (a) Excludes fully amortized intangible assets. (b) Intangible assets not subject to amortization have an indefinite life. N/A - Not applicable.
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) 2018 $ 180 2019 116 2020 102 2021 79 2022 60

Other assets (Tables)

Other assets (Tables)	6 Months Ended
	Jun. 30, 2018
Other Assets [Abstract]
Other Assets	The following table provides the components of other assets presented on the consolidated balance sheet. Other assets June 30, 2018 Dec. 31, 2017 (in millions) Corporate/bank-owned life insurance $ 4,876 $ 4,857 Accounts receivable 3,675 4,590 Fails to deliver 3,073 2,817 Software 1,550 1,499 Prepaid pension assets 1,511 1,416 Renewable energy investments 1,324 1,368 Income taxes receivable 1,225 1,533 Equity in a joint venture and other investments 1,112 1,083 Qualified affordable housing project investments 1,054 1,014 Prepaid expense 502 395 Federal Reserve Bank stock 482 477 Fair value of hedging derivatives 313 323 Seed capital 302 288 Other (a) 1,508 1,369 Total other assets $ 22,507 $ 23,029 (a) At June 30, 2018 and Dec. 31, 2017 , other assets include $93 million and $82 million , respectively, of Federal Home Loan Bank stock, at cost.
Seed Capital and Private Equity Investments Values Using Net Asset Value	The table below presents information on our investments valued using NAV. Other assets valued using NAV June 30, 2018 Dec. 31, 2017 (dollars in millions) Fair value Unfunded commitments Redemption frequency Redemption notice period Fair value Unfunded commitments Redemption frequency Redemption notice period Seed capital $ 44 $ — Daily-quarterly 1-90 days $ 40 $ 1 Daily-quarterly 1-90 days Private equity investments (SBICs) (a) 68 46 N/A N/A 55 42 N/A N/A Other ( b) 73 — Daily-quarterly 1-95 days 59 — Daily-quarterly 1-95 days Total $ 185 $ 46 $ 154 $ 43 (a) 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, which have a life of 10 years, are liquidated. (b) Primarily relates to investments in funds that relate to deferred compensation arrangements with employees. N/A - Not applicable.

Contract revenue (Tables)

Contract revenue (Tables)	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of revenue	Contract revenue is included in fee revenue on the consolidated income statement. The following table presents fee revenue related to contracts with customers, disaggregated by type, for each business segment. Disaggregation of contract revenue by business segment (a) Quarter ended June 30, 2018 Quarter ended March 31, 2018 (in millions) Investment Services Investment Management Other Total Investment Services Investment Management Other Total Fee revenue - contract revenue: Investment services fees: Asset servicing $ 1,098 $ 21 $ 1 $ 1,120 $ 1,117 $ 25 $ — $ 1,142 Clearing services 392 — — 392 413 — 1 414 Issuer services 265 — — 265 260 — — 260 Treasury services 140 1 — 141 138 — — 138 Total investment services fees 1,895 22 1 1,918 1,928 25 1 1,954 Investment management and performance fees 14 893 — 907 14 942 — 956 Financing-related fees 15 — — 15 17 — — 17 Distribution and servicing (14 ) 48 — 34 (14 ) 50 — 36 Investment and other income 69 (50 ) 1 20 69 (51 ) — 18 Total fee revenue - contract revenue 1,979 913 2 2,894 2,014 966 1 2,981 Fee and other revenue - not in scope of ASC 606 (b)(c) 254 28 39 321 236 46 7 289 Total fee and other revenue $ 2,233 $ 941 $ 41 $ 3,215 $ 2,250 $ 1,012 $ 8 $ 3,270 (a) Business segment data has been determined on an internal management basis of accounting, rather than the generally accepted accounting principles used for consolidated financial reporting. (b) Primarily includes foreign exchange and other trading revenue, financing-related fees, investment and other income and net securities gains, all of which are accounted for using other accounting guidance. (c) The Investment Management business includes income from consolidated investment management funds, net of noncontrolling interests, of $5 million in the second quarter of 2018 and less than $1 million in the first quarter of 2018. Disaggregation of contract revenue by business segment (a) Year-to-date June 30, 2018 (in millions) Investment Services Investment Management Other Total Fee revenue - contract revenue: Investment services fees: Asset servicing $ 2,215 $ 46 $ 1 $ 2,262 Clearing services 805 — 1 806 Issuer services 525 — — 525 Treasury services 278 1 — 279 Total investment services fees 3,823 47 2 3,872 Investment management and performance fees 28 1,835 — 1,863 Financing-related fees 32 — — 32 Distribution and servicing (28 ) 98 — 70 Investment and other income 138 (101 ) 1 38 Total fee revenue - contract revenue 3,993 1,879 3 5,875 Fee and other revenue - not in scope of ASC 606 (b)(c) 490 74 46 610 Total fee and other revenue $ 4,483 $ 1,953 $ 49 $ 6,485 (a) Business segment data has been determined on an internal management basis of accounting, rather than the generally accepted accounting principles used for consolidated financial reporting. (b) Primarily includes foreign exchange and other trading revenue, financing-related fees, investment and other income and net securities gains, all of which are accounted for using other accounting guidance. (c) The Investment Management business includes income from consolidated investment management funds, net of noncontrolling interests of $5 million in the first six months of 2018.

Net interest revenue (Tables)

Net interest revenue (Tables)	6 Months Ended
	Jun. 30, 2018
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 Year-to-date June 30, 2018 March 31, 2018 June 30, 2017 June 30, 2018 June 30, 2017 (in millions) Interest revenue Non-margin loans $ 345 $ 305 $ 272 $ 650 $ 517 Margin loans 128 115 87 243 162 Securities: Taxable 615 581 476 1,196 937 Exempt from federal income taxes 14 15 16 29 33 Total securities 629 596 492 1,225 970 Deposits with banks 56 42 27 98 49 Deposits with the Federal Reserve and other central banks 136 126 71 262 128 Federal funds sold and securities purchased under resale agreements 230 170 86 400 153 Trading assets 29 27 17 56 33 Total interest revenue 1,553 1,381 1,052 2,934 2,012 Interest expense Deposits 173 117 32 290 41 Federal funds purchased and securities sold under repurchase agreements 158 107 38 265 62 Trading liabilities 7 9 2 16 4 Other borrowed funds 14 9 4 23 6 Commercial paper 21 12 5 33 10 Customer payables 45 31 16 76 23 Long-term debt 219 177 129 396 248 Total interest expense 637 462 226 1,099 394 Net interest revenue 916 919 826 1,835 1,618 Provision for credit losses (3 ) (5 ) (7 ) (8 ) (12 ) Net interest revenue after provision for credit losses $ 919 $ 924 $ 833 $ 1,843 $ 1,630

Employee benefit plans (Tables)

Employee benefit plans (Tables)	6 Months Ended
	Jun. 30, 2018
Retirement Benefits [Abstract]
Net Periodic Benefit (Credit) Cost	The components of net periodic benefit (credit) cost are as follows. The service cost component is reflected in staff expense, whereas the remaining components are reflected in other expense. Net periodic benefit (credit) cost Quarter ended June 30, 2018 March 31, 2018 June 30, 2017 (in millions) Domestic pension benefits Foreign pension benefits Health care benefits Domestic pension benefits Foreign pension benefits Health care benefits Domestic pension benefits Foreign pension benefits Health care benefits Service cost $ — $ 7 $ — $ — $ 7 $ — $ — $ 7 $ — Interest cost 42 8 2 43 8 2 45 8 2 Expected return on assets (85 ) (14 ) (2 ) (85 ) (15 ) (2 ) (81 ) (12 ) (2 ) Other 17 6 — 17 6 (1 ) 17 9 (1 ) Net periodic benefit (credit) cost $ (26 ) $ 7 $ — $ (25 ) $ 6 $ (1 ) $ (19 ) $ 12 $ (1 ) Net periodic benefit (credit) cost Year-to-date June 30, 2018 June 30, 2017 (in millions) Domestic pension benefits Foreign pension benefits Health care benefits Domestic pension benefits Foreign pension benefits Health care benefits Service cost $ — $ 14 $ — $ — $ 14 $ — Interest cost 85 16 4 90 16 4 Expected return on assets (170 ) (29 ) (4 ) (162 ) (24 ) (4 ) Other 34 12 (1 ) 34 18 (2 ) Net periodic benefit (credit) cost $ (51 ) $ 13 $ (1 ) $ (38 ) $ 24 $ (2 )

Variable interest entities an40

Variable interest entities and securitization (Tables)	6 Months Ended
	Jun. 30, 2018
Securitizations And Variable Interest Entities Disclosure [Abstract]
Incremental Assets and Liabilities Included in Consolidated Financial Statements	The following table presents the incremental assets and liabilities included in BNY Mellon’s consolidated financial statements, after applying intercompany eliminations, as of June 30, 2018 and Dec. 31, 2017 . 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. Consolidated investments June 30, 2018 Dec. 31, 2017 (in millions) Investment Management funds Securitization Total consolidated investments Investment Management funds Securitization Total consolidated investments Securities - Available-for-sale $ — $ — $ — $ — $ 400 $ 400 Trading assets 175 400 575 516 — 516 Other assets 253 — 253 215 — 215 Total assets $ 428 (a) $ 400 $ 828 $ 731 (b) $ 400 $ 1,131 Other liabilities $ 3 $ 363 $ 366 $ 2 $ 367 $ 369 Total liabilities $ 3 (a) $ 363 $ 366 $ 2 (b) $ 367 $ 369 Nonredeemable noncontrolling interests $ 52 (a) $ — $ 52 $ 316 (b) $ — $ 316 (a) Includes voting model entities (“VMEs”) with assets of $295 million , liabilities of $3 million and nonredeemable noncontrolling interests of less than $1 million . (b) Includes VMEs with assets of $84 million , liabilities of $1 million and nonredeemable noncontrolling interests of $1 million .
Schedule of Variable Interest Entities	As of June 30, 2018 and Dec. 31, 2017 , the following assets and liabilities related to the VIEs where BNY Mellon is not the primary beneficiary are included in our consolidated financial statements and primarily relate to accounting for our investments in qualified affordable housing and renewable energy projects. The maximum loss exposure indicated in the table below relates solely to BNY Mellon’s investments in, and unfunded commitments to, the VIEs. Non-consolidated VIEs June 30, 2018 Dec. 31, 2017 (in millions) Assets Liabilities Maximum loss exposure Assets Liabilities Maximum loss exposure Securities - Available-for-sale (a) $ 222 $ — $ 222 $ 203 $ — $ 203 Other 2,603 498 3,101 2,592 486 3,078 (a) Includes investments in the Company’s sponsored CLOs.

Preferred stock (Tables)

Preferred stock (Tables)	6 Months Ended
	Jun. 30, 2018
Stockholders' Equity Note [Abstract]
Preferred Stock Summary	The following table summarizes BNY Mellon’s preferred stock issued and outstanding at June 30, 2018 and Dec. 31, 2017 . Preferred stock summary (a) Total shares issued and outstanding Carrying value (b) (in millions) Per annum dividend rate June 30, 2018 Dec. 31, 2017 June 30, 2018 Dec. 31, 2017 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 (l42

Other comprehensive income (loss) (Tables)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Components of Other Comprehensive Income (Loss)	Components of other comprehensive income (loss) Quarter ended June 30, 2018 March 31, 2018 June 30, 2017 (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) $ (302 ) $ (98 ) $ (400 ) $ 201 $ 43 $ 244 $ 249 $ 81 $ 330 Total foreign currency translation (302 ) (98 ) (400 ) 201 43 244 249 81 330 Unrealized (loss) gain on assets available-for-sale: Unrealized (loss) gain arising during period (103 ) 39 (64 ) (342 ) 67 (275 ) 146 (55 ) 91 Reclassification adjustment (b) (1 ) 1 — 49 (12 ) 37 — (1 ) (1 ) Net unrealized (loss) gain on assets available-for-sale (104 ) 40 (64 ) (293 ) 55 (238 ) 146 (56 ) 90 Defined benefit plans: Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost (b) 22 (6 ) 16 22 (5 ) 17 24 (8 ) 16 Total defined benefit plans 22 (6 ) 16 22 (5 ) 17 24 (8 ) 16 Unrealized gain (loss) on cash flow hedges: Unrealized hedge (loss) gain arising during period (17 ) 3 (14 ) 7 (1 ) 6 (8 ) 4 (4 ) Reclassification of net loss (gain) to net income: FX contracts - other revenue 1 — 1 (4 ) 1 (3 ) — — — FX contracts - salary expense (2 ) 1 (1 ) (6 ) 1 (5 ) 9 (4 ) 5 Total reclassifications to net income (b) (1 ) 1 — (10 ) 2 (8 ) 9 (4 ) 5 Net unrealized (loss) gain on cash flow hedges (18 ) 4 (14 ) (3 ) 1 (2 ) 1 — 1 Total other comprehensive (loss) income $ (402 ) $ (60 ) $ (462 ) $ (73 ) $ 94 $ 21 $ 420 $ 17 $ 437 Components of other comprehensive income (loss) Year-to-date June 30, 2018 June 30, 2017 (in millions) 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) $ (101 ) $ (55 ) $ (156 ) $ 345 $ 110 $ 455 Total foreign currency translation (101 ) (55 ) (156 ) 345 110 455 Unrealized (loss) gain on assets available-for-sale: Unrealized (loss) gain arising during period (445 ) 106 (339 ) 310 (125 ) 185 Reclassification adjustment (b) 48 (11 ) 37 (10 ) 3 (7 ) Net unrealized (loss) gain on assets available-for-sale (397 ) 95 (302 ) 300 (122 ) 178 Defined benefit plans: Net gain (loss) arising during the period — — — 3 (1 ) 2 Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost (b) 44 (11 ) 33 49 (15 ) 34 Total defined benefit plans 44 (11 ) 33 52 (16 ) 36 Unrealized (loss) gain on cash flow hedges: Unrealized hedge (loss) gain arising during period (10 ) 2 (8 ) 6 (1 ) 5 Reclassification of net loss (gain) to net income: FX contracts - trading revenue — — — (3 ) 1 (2 ) FX contracts - other revenue (3 ) 1 (2 ) — — — FX contracts - salary expense (8 ) 2 (6 ) 13 (5 ) 8 Total reclassifications to net income (b) (11 ) 3 (8 ) 10 (4 ) 6 Net unrealized (loss) gain on cash flow hedges (21 ) 5 (16 ) 16 (5 ) 11 Total other comprehensive (loss) income $ (475 ) $ 34 $ (441 ) $ 713 $ (33 ) $ 680 (a) Includes the impact of hedges of net investments in foreign subsidiaries. See Note 17 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 17 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)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Financial Instruments Carried at Fair Value on Recurring Basis	The following tables present the financial instruments carried at fair value at June 30, 2018 and Dec. 31, 2017 , 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 second quarter of 2018 . Assets measured at fair value on a recurring basis at June 30, 2018 Total carrying (dollars in millions) Level 1 Level 2 Level 3 Netting (a) Available-for-sale securities: U.S. Treasury $ 18,855 $ — $ — $ — $ 18,855 U.S. government agencies — 1,447 — — 1,447 Sovereign debt/sovereign guaranteed 9,353 2,733 — — 12,086 State and political subdivisions — 2,630 — — 2,630 Agency RMBS — 24,803 — — 24,803 Non-agency RMBS (b) — 1,507 — — 1,507 Non-agency commercial MBS — 1,378 — — 1,378 Agency commercial MBS — 9,566 — — 9,566 CLOs — 3,177 — — 3,177 Corporate bonds — 1,146 — — 1,146 Other debt securities — 4,452 — — 4,452 Foreign covered bonds — 2,893 — — 2,893 Total available-for-sale securities 28,208 55,732 — — 83,940 Trading assets: Debt instruments 1,054 2,019 — — 3,073 Equity instruments (c) 1,087 — — — 1,087 Derivative assets not designated as hedging: Interest rate 14 3,572 — (2,322 ) 1,264 Foreign exchange — 5,082 — (3,495 ) 1,587 Equity and other contracts 1 77 — (54 ) 24 Total derivative assets not designated as hedging 15 8,731 — (5,871 ) 2,875 Total trading assets 2,156 10,750 — (5,871 ) 7,035 Other assets: Derivative assets designated as hedging: Interest rate — 60 — — 60 Foreign exchange — 253 — — 253 Total derivative assets designated as hedging — 313 — — 313 Other assets (d) 122 223 — — 345 Other assets measured at NAV (d) 185 Total other assets 122 536 — — 843 Subtotal assets of operations at fair value 30,486 67,018 — (5,871 ) 91,818 Percentage of assets of operations prior to netting 31 % 69 % — % Assets of consolidated investment management funds 154 274 — — 428 Total assets $ 30,640 $ 67,292 $ — $ (5,871 ) $ 92,246 Percentage of total assets prior to netting 31 % 69 % — % Liabilities measured at fair value on a recurring basis at June 30, 2018 Total carrying (dollars in millions) Level 1 Level 2 Level 3 Netting (a) Trading liabilities: Debt instruments $ 973 $ 116 $ — $ — $ 1,089 Equity instruments 5 — — — 5 Derivative liabilities not designated as hedging: Interest rate 7 3,101 — (2,428 ) 680 Foreign exchange — 5,612 — (3,862 ) 1,750 Equity and other contracts — 136 — (80 ) 56 Total derivative liabilities not designated as hedging 7 8,849 — (6,370 ) 2,486 Total trading liabilities 985 8,965 — (6,370 ) 3,580 Long-term debt (c) — 363 — — 363 Other liabilities – derivative liabilities designated as hedging: Interest rate — 62 — — 62 Foreign exchange — 13 — — 13 Total other liabilities – derivative liabilities designated as hedging — 75 — — 75 Subtotal liabilities of operations at fair value 985 9,403 — (6,370 ) 4,018 Percentage of liabilities of operations prior to netting 9 % 91 % — % Liabilities of consolidated investment management funds — 3 — — 3 Total liabilities $ 985 $ 9,406 $ — $ (6,370 ) $ 4,021 Percentage of total liabilities prior to netting 9 % 91 % — % (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 $943 million in Level 2 that was included in the former Grantor Trust. (c) Includes certain interests in securitizations. (d) Includes seed capital, private equity and other assets. Assets measured at fair value on a recurring basis at Dec. 31, 2017 Total carrying value (dollars in millions) Level 1 Level 2 Level 3 Netting (a) Available-for-sale securities: U.S. Treasury $ 15,263 $ — $ — $ — $ 15,263 U.S. government agencies — 908 — — 908 Sovereign debt/sovereign guaranteed 9,919 2,638 — — 12,557 State and political subdivisions — 2,957 — — 2,957 Agency RMBS — 23,819 — — 23,819 Non-agency RMBS (b) — 1,578 — — 1,578 Other RMBS — 149 — — 149 Non-agency commercial MBS — 1,360 — — 1,360 Agency commercial MBS — 8,762 — — 8,762 CLOs — 2,909 — — 2,909 Other asset-backed securities — 1,043 — — 1,043 Money market funds (c) 963 — — — 963 Corporate bonds — 1,255 — — 1,255 Other debt securities — 3,491 — — 3,491 Foreign covered bonds — 2,529 — — 2,529 Total available-for-sale securities 26,145 53,398 — — 79,543 Trading assets: Debt and equity instruments (c) 1,344 1,910 — — 3,254 Derivative assets not designated as hedging: Interest rate 9 6,430 — (5,075 ) 1,364 Foreign exchange — 5,104 — (3,720 ) 1,384 Equity and other contracts — 70 — (50 ) 20 Total derivative assets not designated as hedging 9 11,604 — (8,845 ) 2,768 Total trading assets 1,353 13,514 — (8,845 ) 6,022 Other assets : Derivative assets designated as hedging: Interest rate — 278 — — 278 Foreign exchange — 45 — — 45 Total derivative assets designated as hedging — 323 — — 323 Other assets (d) 144 170 — — 314 Other assets measured at NAV (d) 154 Total other assets 144 493 — — 791 Subtotal assets of operations at fair value 27,642 67,405 — (8,845 ) 86,356 Percentage of assets of operations prior to netting 29 % 71 % — % Assets of consolidated investment management funds 322 409 — — 731 Total assets $ 27,964 $ 67,814 $ — $ (8,845 ) $ 87,087 Percentage of total assets prior to netting 29 % 71 % — % Liabilities measured at fair value on a recurring basis at Dec. 31, 2017 Total carrying value (dollars in millions) Level 1 Level 2 Level 3 Netting (a) Trading liabilities: Debt and equity instruments $ 1,128 $ 80 $ — $ — $ 1,208 Derivative liabilities not designated as hedging: Interest rate 4 6,349 — (5,495 ) 858 Foreign exchange — 5,067 — (3,221 ) 1,846 Equity and other contracts — 153 — (81 ) 72 Total derivative liabilities not designated as hedging 4 11,569 — (8,797 ) 2,776 Total trading liabilities 1,132 11,649 — (8,797 ) 3,984 Long-term debt ( c ) — 367 — — 367 Other liabilities – derivative liabilities designated as hedging: Interest rate — 534 — — 534 Foreign exchange — 266 — — 266 Total other liabilities – derivative liabilities designated as hedging — 800 — — 800 Subtotal liabilities of operations at fair value 1,132 12,816 — (8,797 ) 5,151 Percentage of liabilities of operations prior to netting 8 % 92 % — % Liabilities of consolidated investment management funds 1 1 — — 2 Total liabilities $ 1,133 $ 12,817 $ — $ (8,797 ) $ 5,153 Percentage of total liabilities prior to netting 8 % 92 % — % (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 $1,091 million in Level 2 that was included in the former Grantor Trust. (c) Includes certain interests in securitizations. (d) Includes private equity investments and seed capital.
Details Of Certain Items Measured At Fair Value on Recurring Basis	Details of certain available-for-sale securities measured at fair value on a recurring basis June 30, 2018 Dec. 31, 2017 Total carrying value (b) Ratings (a) Total carrying value Ratings (a) AAA/ AA- A+/ A- BBB+/ BBB- BB+ and lower AAA/ AA- A+/ A- BBB+/ BBB- BB+ and lower (dollars in millions) (b) Non-agency RMBS (c) , originated in: 2007 $ 355 15 % 2 % 4 % 79 % $ 419 13 % 3 % — % 84 % 2006 412 — 17 1 82 467 — 17 — 83 2005 454 6 1 5 88 509 6 2 6 86 2004 and earlier 286 3 5 31 61 332 3 2 31 64 Total non-agency RMBS $ 1,507 6 % 7 % 8 % 79 % $ 1,727 (d) 6 % 6 % 8 % 80 % Non-agency commercial MBS, originated in: 2009-2017 $ 1,331 96 % 4 % — % — % $ 1,309 94 % 6 % — % — % 2005 47 100 — — — 51 100 — — — Total non-agency commercial MBS $ 1,378 96 % 4 % — % — % $ 1,360 94 % 6 % — % — % Foreign covered bonds: Canada $ 1,619 100 % — % — % — % $ 1,659 100 % — % — % — % United Kingdom 450 100 — — — 103 100 — — — Australia 330 100 — — — 265 100 — — — Sweden 193 100 — — — 136 100 — — — Other 301 100 — — — 366 100 — — — Total foreign covered bonds $ 2,893 100 % — % — % — % $ 2,529 100 % — % — % — % Sovereign debt/sovereign guaranteed: United Kingdom $ 3,044 100 % — % — % — % $ 3,052 100 % — % — % — % Germany 1,844 100 — — — 1,586 100 — — — France 1,809 100 — — — 2,046 100 — — — Spain 1,549 — — 100 — 1,635 — — 100 — Italy 986 — — 100 — 1,292 — — 100 — Netherlands 899 100 — — — 1,027 100 — — — Ireland 804 — 100 — — 843 — 100 — — Belgium 317 100 — — — 803 100 — — — Other (e) 834 86 — — 14 273 50 — — 50 Total sovereign debt/sovereign guaranteed $ 12,086 71 % 7 % 21 % 1 % $ 12,557 69 % 7 % 23 % 1 % (a) Represents ratings by S&P or the equivalent. (b) At June 30, 2018 and Dec. 31, 2017 , sovereign debt/sovereign guaranteed securities 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. (c) Includes $943 million at June 30, 2018 and $1,091 million at Dec. 31, 2017 that were included in the former Grantor Trust. (d) Includes other RMBS. (e) Includes non-investment grade sovereign debt/sovereign guaranteed securities related to Brazil of $116 million at June 30, 2018 and $136 million at Dec. 31, 2017 .
Assets Measured at Fair Value on Nonrecurring Basis	The following tables present the financial instruments carried on the consolidated balance sheet by caption and level in the fair value hierarchy as of June 30, 2018 and Dec. 31, 2017 , for which a nonrecurring change in fair value has been recorded during the quarters ended June 30, 2018 and Dec. 31, 2017 . Assets measured at fair value on a nonrecurring basis at June 30, 2018 Total carrying value (in millions) Level 1 Level 2 Level 3 Loans (a) $ — $ 67 $ 5 $ 72 Other assets (b) — 26 — 26 Total assets at fair value on a nonrecurring basis $ — $ 93 $ 5 $ 98 Assets measured at fair value on a nonrecurring basis at Dec. 31, 2017 Total carrying value (in millions) Level 1 Level 2 Level 3 Loans (a) $ — $ 73 $ 6 $ 79 Other assets (b) — 4 — 4 Total assets at fair value on a nonrecurring basis $ — $ 77 $ 6 $ 83 (a) During the quarters ended June 30, 2018 and Dec. 31, 2017 , the fair value of these loans decreased less than $1 million and less than $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 June 30, 2018 and Dec. 31, 2017 , by caption on the consolidated balance sheet and by the valuation hierarchy. See Note 18 of the Notes to Consolidated Financial Statements in our 2017 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 June 30, 2018 (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 $ — $ 75,116 $ — $ 75,116 $ 75,116 Interest-bearing deposits with banks — 16,155 — 16,155 16,134 Federal funds sold and securities purchased under resale agreements — 26,494 — 26,494 26,494 Securities held-to-maturity 5,948 28,240 — 34,188 35,141 Loans (a) — 56,412 — 56,412 56,334 Other financial assets 5,361 1,353 — 6,714 6,714 Total $ 11,309 $ 203,770 $ — $ 215,079 $ 215,933 Liabilities: Noninterest-bearing deposits $ — $ 75,463 $ — $ 75,463 $ 75,463 Interest-bearing deposits — 152,843 — 152,843 155,097 Federal funds purchased and securities sold under repurchase agreements — 13,200 — 13,200 13,200 Payables to customers and broker-dealers — 19,123 — 19,123 19,123 Commercial paper — 2,508 — 2,508 2,508 Borrowings — 3,006 — 3,006 3,006 Long-term debt — 27,403 — 27,403 27,897 Total $ — $ 293,546 $ — $ 293,546 $ 296,294 (a) Does not include the leasing portfolio. Summary of financial instruments Dec. 31, 2017 (in millions) Level 1 Level 2 Level 3 Total estimated Carrying Assets: Interest-bearing deposits with the Federal Reserve and other central banks $ — $ 91,510 $ — $ 91,510 $ 91,510 Interest-bearing deposits with banks — 11,982 — 11,982 11,979 Federal funds sold and securities purchased under resale agreements — 28,135 — 28,135 28,135 Securities held-to-maturity 11,365 29,147 — 40,512 40,827 Loans (a) — 60,219 — 60,219 60,082 Other financial assets 5,382 1,244 — 6,626 6,626 Total $ 16,747 $ 222,237 $ — $ 238,984 $ 239,159 Liabilities: Noninterest-bearing deposits $ — $ 82,716 $ — $ 82,716 $ 82,716 Interest-bearing deposits — 160,042 — 160,042 161,606 Federal funds purchased and securities sold under repurchase agreements — 15,163 — 15,163 15,163 Payables to customers and broker-dealers — 20,184 — 20,184 20,184 Commercial paper — 3,075 — 3,075 3,075 Borrowings — 2,931 — 2,931 2,931 Long-term debt — 27,789 — 27,789 27,612 Total $ — $ 311,900 $ — $ 311,900 $ 313,287 (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 (a) (in millions) Gain (Loss) June 30, 2018 Securities available-for-sale $ 16,308 $ 16,756 $ 60 $ (62 ) Long-term debt 23,460 24,100 — — Dec. 31, 2017 Securities available-for-sale $ 12,307 $ 12,365 $ 102 $ (301 ) Long-term debt 23,821 23,950 175 (233 ) (a) Unrealized gain/loss amounts reflect the fact that certain of the derivatives are cleared and settled through central clearing counterparties where cash collateral received and paid is deemed a settlement of the derivative.

Fair value option (Tables)

Fair value option (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities of Consolidated Investment Management Funds, at Fair Value	The following table presents the assets and liabilities of consolidated investment management funds, at fair value. Assets and liabilities of consolidated investment management funds, at fair value June 30, 2018 Dec. 31, 2017 (in millions) Assets of consolidated investment management funds: Trading assets $ 175 $ 516 Other assets 253 215 Total assets of consolidated investment management funds $ 428 $ 731 Liabilities of consolidated investment management funds: Other liabilities $ 3 $ 2 Total liabilities of consolidated investment management funds $ 3 $ 2
Change in Fair Value of Long-Term Debt in Foreign Exchange and Other Trading Revenue	The following table presents the change in fair value of long-term debt recorded in foreign exchange and other trading revenue in the consolidated income statement. Foreign exchange and other trading revenue (a) (in millions) 2Q18 1Q18 2Q17 YTD18 YTD17 Long-term debt $ — $ 4 $ (4 ) $ 4 $ (5 ) (a) The change in fair value is approximately offset by an economic hedge included in foreign exchange and other trading revenue.

Derivative instruments (Tables)

Derivative instruments (Tables)	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Gains (Losses) Related to Hedging	The following table presents the gains (losses) related to our hedging derivative portfolio recognized in the income statement. Income statement impact of fair value and cash flow hedges (in millions) Location of gains (losses) 2Q18 1Q18 2Q17 YTD18 YTD17 Fair value hedges of available-for-sale securities Derivative Interest income $ 136 $ 397 $ (103 ) $ 533 $ (21 ) Hedged item Interest income (133 ) (383 ) 89 (516 ) 8 Fair value hedges of long-term debt Derivative Interest expense (131 ) (378 ) 105 (509 ) 33 Hedged item Interest expense 129 377 (98 ) 506 (31 ) Cash flow hedges of forecasted FX exposures Gain reclassified from OCI into income Trading revenue — — — — 3 (Loss) gain reclassified from OCI into income Other revenue (1 ) 4 — 3 — Gain (loss) reclassified from OCI into income Salary expense 2 6 (9 ) 8 (13 ) Gains (losses) recognized in the consolidated income statement due to fair value and cash flow hedging relationships $ 2 $ 23 $ (16 ) $ 25 $ (21 )
Impacts of Hedging Derivatives in Net Investment Hedging Relationships	The following table presents the impact of hedging derivatives used in net investment hedging relationships in the income statement. Impact of derivative instruments used in net investment hedging relationships in the income statement (in millions) Derivatives in net investment hedging relationships Gain or (loss) recognized in accumulated OCI on derivatives Location of gain or (loss) reclassified from accumulated OCI into income Gain or (loss) reclassified from accumulated OCI into income 2Q18 1Q18 2Q17 YTD18 YTD17 2Q18 1Q18 2Q17 YTD18 YTD17 FX contracts $ 429 $ (158 ) $ (274 ) $ 271 $ (370 ) Net interest revenue $ — $ — $ — $ — $ —
Summary of Hedged Items in Fair Value Hedging Relationships	The following table presents information on the hedged items in fair value hedging relationships. Hedged items in fair value hedging relationships at June 30, 2018 Carrying amount of hedged asset or liability Hedge accounting basis adjustment (decrease) (in millions) Available-for-sale securities $ 16,308 $ (375 ) Long-term debt 23,460 (640 ) (a) (a) Includes $14 million of basis adjustment (reduction) on long-term debt associated with terminated hedges, whereby the long-term debt instrument has been subsequently re-designated in new hedge relationships existing as of the balance sheet date.
Impact of Derivative Instruments on the Balance Sheet	The following table summarizes the notional amount and credit exposure of our total derivative portfolio at June 30, 2018 and Dec. 31, 2017 . Impact of derivative instruments on the balance sheet Notional value Asset derivatives fair value Liability derivatives fair value (in millions) June 30, 2018 Dec. 31, 2017 June 30, 2018 Dec. 31, 2017 June 30, 2018 Dec. 31, 2017 Derivatives designated as hedging instruments: (a)(b) Interest rate contracts $ 40,856 $ 36,315 $ 60 $ 278 $ 62 $ 534 Foreign exchange contracts 7,811 8,923 253 45 13 266 Total derivatives designated as hedging instruments $ 313 $ 323 $ 75 $ 800 Derivatives not designated as hedging instruments: (b)(c) Interest rate contracts $ 257,199 $ 267,485 $ 3,586 $ 6,439 $ 3,108 $ 6,353 Foreign exchange contracts 728,861 767,999 5,082 5,104 5,612 5,067 Equity contracts 1,142 1,698 78 70 133 149 Credit contracts 180 180 — — 3 4 Total derivatives not designated as hedging instruments $ 8,746 $ 11,613 $ 8,856 $ 11,573 Total derivatives fair value (d) $ 9,059 $ 11,936 $ 8,931 $ 12,373 Effect of master netting agreements (e) (5,871 ) (8,845 ) (6,370 ) (8,797 ) Fair value after effect of master netting agreements $ 3,188 $ 3,091 $ 2,561 $ 3,576 (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) Pursuant to a rule change at a clearing organization in 2018, cash collateral exchanged is deemed a settlement of the derivative each day. The impact of the change reduced the gross fair value of derivative asset and liabilities and a corresponding decrease in effect of master netting agreements, with no impact to the consolidated balance sheet. (c) 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. (d) Fair values are on a gross basis, before consideration of master netting agreements, as required by ASC 815, Derivatives and Hedging. (e) Effect of master netting agreements includes cash collateral received and paid of $740 million and $1,239 million , respectively, at June 30, 2018 , and $925 million and $877 million , respectively, at Dec. 31, 2017 .
Revenue from Foreign Exchange and Other Trading	The following table presents our foreign exchange and other trading revenue. Foreign exchange and other trading revenue (in millions) 2Q18 1Q18 2Q17 YTD18 YTD17 Foreign exchange $ 171 $ 183 $ 151 $ 354 $ 305 Other trading revenue 16 26 14 42 24 Total foreign exchange and other trading revenue $ 187 $ 209 $ 165 $ 396 $ 329
Fair Value of Derivative Contracts Falling under Early Termination Provisions that were in Net Liability Position	The following table shows the aggregate fair value of OTC derivative contracts in net liability positions that contained credit-risk contingent features and the value of collateral that has been posted. (in millions) June 30, 2018 Dec. 31, 2017 Aggregate fair value of OTC derivatives in net liability positions (a) $ 2,861 $ 2,393 Collateral posted $ 3,183 $ 2,115 (a) Before consideration of cash collateral. The following table shows the fair value of contracts falling under early termination provisions that were in net liability positions for three key ratings triggers. Potential close-out exposures (fair value) (a) (in millions) June 30, 2018 Dec. 31, 2017 If The Bank of New York Mellon’s rating changed to: (b) A3/A- $ 35 $ 92 Baa2/BBB $ 282 $ 748 Ba1/BB+ $ 1,327 $ 2,007 (a) The amounts represent potential total close-out values if The Bank of New York Mellon’s long-term issuer rating were to immediately drop to the indicated levels, and do not reflect collateral posted. (b) Represents rating by Moody’s/S&P.
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 June 30, 2018 Gross assets recognized Gross amounts offset in the balance sheet Net assets recognized in 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 $ 2,783 $ 2,322 $ 461 $ 157 $ — $ 304 Foreign exchange contracts 4,621 3,495 1,126 52 — 1,074 Equity and other contracts 74 54 20 — — 20 Total derivatives subject to netting arrangements 7,478 5,871 1,607 209 — 1,398 Total derivatives not subject to netting arrangements 1,581 — 1,581 — — 1,581 Total derivatives 9,059 5,871 3,188 209 — 2,979 Reverse repurchase agreements 51,949 36,766 (b) 15,183 15,142 — 41 Securities borrowing 11,303 — 11,303 10,974 — 329 Total $ 72,311 $ 42,637 $ 29,674 $ 26,325 $ — $ 3,349 Offsetting of derivative assets and financial assets at Dec. 31, 2017 Gross assets recognized Gross amounts offset in the balance sheet Net assets recognized in 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 $ 5,915 $ 5,075 $ 840 $ 178 $ — $ 662 Foreign exchange contracts 4,666 3,720 946 116 — 830 Equity and other contracts 67 50 17 — — 17 Total derivatives subject to netting arrangements 10,648 8,845 1,803 294 — 1,509 Total derivatives not subject to netting arrangements 1,288 — 1,288 — — 1,288 Total derivatives 11,936 8,845 3,091 294 — 2,797 Reverse repurchase agreements 42,784 25,848 (b) 16,936 16,923 — 13 Securities borrowing 11,199 — 11,199 10,858 — 341 Total $ 65,919 $ 34,693 $ 31,226 $ 28,075 $ — $ 3,151 (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 June 30, 2018 Net liabilities recognized in 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 $ 3,114 $ 2,428 $ 686 $ 610 $ — $ 76 Foreign exchange contracts 5,026 3,862 1,164 351 — 813 Equity and other contracts 125 80 45 44 — 1 Total derivatives subject to netting arrangements 8,265 6,370 1,895 1,005 — 890 Total derivatives not subject to netting arrangements 666 — 666 — — 666 Total derivatives 8,931 6,370 2,561 1,005 — 1,556 Repurchase agreements 45,316 36,766 (b) 8,550 8,550 — — Securities lending 1,706 — 1,706 1,627 — 79 Total $ 55,953 $ 43,136 $ 12,817 $ 11,182 $ — $ 1,635 Offsetting of derivative liabilities and financial liabilities at Dec. 31, 2017 Net liabilities recognized in 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 $ 6,810 $ 5,495 $ 1,315 $ 1,222 $ — $ 93 Foreign exchange contracts 4,765 3,221 1,544 177 — 1,367 Equity and other contracts 143 81 62 58 — 4 Total derivatives subject to netting arrangements 11,718 8,797 2,921 1,457 — 1,464 Total derivatives not subject to netting arrangements 655 — 655 — — 655 Total derivatives 12,373 8,797 3,576 1,457 — 2,119 Repurchase agreements 33,908 25,848 (b) 8,060 8,059 — 1 Securities lending 2,186 — 2,186 2,091 — 95 Total $ 48,467 $ 34,645 $ 13,822 $ 11,607 $ — $ 2,215 (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 table presents 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 June 30, 2018 Dec. 31, 2017 Remaining contractual maturity Total Remaining contractual maturity Total (in millions) Overnight and continuous Up to 30 days 30 days or more Overnight and continuous Up to 30 days 30 days or more Repurchase agreements: U.S. Treasury $ 37,761 $ 1 $ — $ 37,762 $ 26,883 $ 11 $ — $ 26,894 U.S. government agencies 493 113 — 606 570 180 — 750 Agency RMBS 2,503 186 18 2,707 2,574 109 — 2,683 Corporate bonds 716 — 1,368 2,084 373 — 1,052 1,425 Other debt securities 315 — 913 1,228 253 — 731 984 Equity securities 428 — 501 929 655 — 517 1,172 Total $ 42,216 $ 300 $ 2,800 $ 45,316 $ 31,308 $ 300 $ 2,300 $ 33,908 Securities lending: U.S. government agencies $ 39 $ — $ — $ 39 $ 72 $ — $ — $ 72 Other debt securities 434 — — 434 316 — — 316 Equity securities 1,233 — — 1,233 1,798 — — 1,798 Total $ 1,706 $ — $ — $ 1,706 $ 2,186 $ — $ — $ 2,186 Total borrowings $ 43,922 $ 300 $ 2,800 $ 47,022 $ 33,494 $ 300 $ 2,300 $ 36,094

Commitments and contingent li46

Commitments and contingent liabilities (Tables)	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Summary of Off-Balance Sheet Credit Risks, Net of Participations	The following table presents a summary of our off-balance sheet credit risks. Off-balance sheet credit risks June 30, 2018 Dec. 31, 2017 (in millions) Lending commitments $ 49,633 $ 51,467 Standby letters of credit (a) 3,055 3,531 Commercial letters of credit 114 122 Securities lending indemnifications (b)(c) 465,013 432,084 (a) Net of participations totaling $581 million at June 30, 2018 and $672 million at Dec. 31, 2017 . (b) Excludes the indemnification for securities for which BNY Mellon acts as an agent on behalf of CIBC Mellon clients, which totaled $68 billion at June 30, 2018 and $69 billion at Dec. 31, 2017 . (c) Includes cash collateral, invested in indemnified repurchase agreements, held by us as securities lending agent of $40 billion at June 30, 2018 and $33 billion at Dec. 31, 2017 .
Standby Letters of Credits by Investment Grade	The table below shows SBLCs by investment grade: Standby letters of credit June 30, 2018 Dec. 31, 2017 Investment grade 87 % 84 % Non-investment grade 13 % 16 %
Significant Industry Concentrations Related to Credit Exposure	The tables below present our credit exposure in the financial institutions and commercial portfolios. Financial institutions portfolio exposure (in billions) June 30, 2018 Loans Unfunded commitments Total exposure Securities industry $ 3.4 $ 18.8 $ 22.2 Asset managers 1.4 6.3 7.7 Banks 6.0 1.2 7.2 Insurance 0.1 3.3 3.4 Government 0.1 0.7 0.8 Other 0.8 1.3 2.1 Total $ 11.8 $ 31.6 $ 43.4 Commercial portfolio exposure (in billions) June 30, 2018 Loans Unfunded commitments Total exposure Manufacturing $ 1.2 $ 5.4 $ 6.6 Services and other 0.7 5.5 6.2 Energy and utilities 0.4 4.6 5.0 Media and telecom 0.2 1.1 1.3 Total $ 2.5 $ 16.6 $ 19.1

Lines of business (Tables)

Lines of business (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Contribution of Segments to Overall Profitability	The following consolidating schedules present the contribution of our businesses to our overall profitability. For the quarter ended June 30, 2018 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 2,233 $ 941 (a) $ 41 $ 3,215 (a) Net interest revenue (expense) 874 77 (35 ) 916 Total revenue 3,107 1,018 (a) 6 4,131 (a) Provision for credit losses 1 2 (6 ) (3 ) Noninterest expense 1,967 697 81 2,745 (b) Income (loss) before taxes $ 1,139 $ 319 (a) $ (69 ) $ 1,389 (a)(b) Pre-tax operating margin (c) 37 % 31 % N/M 34 % Average assets $ 264,387 $ 31,504 $ 50,437 $ 346,328 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of $5 million , representing $12 million of income and noncontrolling interests of $7 million . Income before taxes is net of noncontrolling interests of $7 million . (b) Noninterest expense includes a loss attributable to noncontrolling interests of $2 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the quarter ended March 31, 2018 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 2,250 $ 1,012 (a) $ 8 $ 3,270 (a) Net interest revenue (expense) 844 76 (1 ) 919 Total revenue 3,094 1,088 (a) 7 4,189 (a) Provision for credit losses (7 ) 2 — (5 ) Noninterest expense 1,949 705 87 2,741 (b) Income (loss) before taxes $ 1,152 $ 381 (a) $ (80 ) $ 1,453 (a)(b) Pre-tax operating margin (c) 37 % 35 % N/M 35 % Average assets $ 278,095 $ 31,963 $ 48,117 $ 358,175 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of less than $1 million , representing $11 million of losses and a loss attributable to noncontrolling interests of $11 million . Income before taxes is net of a loss attributable to noncontrolling interests of $11 million . (b) Noninterest expense includes income attributable to noncontrolling interests of $2 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the quarter ended June 30, 2017 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 2,115 $ 899 (a) $ 113 $ 3,127 (a) Net interest revenue (expense) 761 87 (22 ) 826 Total revenue 2,876 986 (a) 91 3,953 (a) Provision for credit losses (3 ) — (4 ) (7 ) Noninterest expense 1,927 698 28 2,653 (b) Income before taxes $ 952 $ 288 (a) $ 67 $ 1,307 (a)(b) Pre-tax operating margin (c) 33 % 29 % N/M 33 % Average assets $ 254,724 $ 31,355 $ 56,436 $ 342,515 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of $7 million , representing $10 million of income and noncontrolling interests of $3 million . Income before taxes is net of noncontrolling interests of $3 million . (b) Noninterest expense includes a loss attributable to noncontrolling interests of $2 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful. For the six months ended June 30, 2018 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 4,483 $ 1,953 (a) $ 49 $ 6,485 (a) Net interest revenue (expense) 1,718 153 (36 ) 1,835 Total revenue 6,201 2,106 (a) 13 8,320 (a) Provision for credit losses (6 ) 4 (6 ) (8 ) Noninterest expense 3,916 1,402 168 5,486 Income (loss) before taxes $ 2,291 $ 700 (a) $ (149 ) $ 2,842 (a) Pre-tax operating margin (b) 37 % 33 % N/M 34 % Average assets $ 271,203 $ 31,732 $ 49,284 $ 352,219 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of $5 million , representing $1 million of income and a loss attributable to noncontrolling interests of $4 million . Income before taxes is net of a loss attributable to noncontrolling interests of $4 million . (b) Income before taxes divided by total revenue. N/M - Not meaningful. For the six months ended June 30, 2017 Investment Investment Other Consolidated (dollars in millions) Total fee and other revenue $ 4,199 $ 1,776 (a) $ 185 $ 6,160 (a) Net interest revenue (expense) 1,468 173 (23 ) 1,618 Total revenue 5,667 1,949 (a) 162 7,778 (a) Provision for credit losses (3 ) 3 (12 ) (12 ) Noninterest expense 3,776 1,381 135 5,292 (b) Income before taxes $ 1,894 $ 565 (a) $ 39 $ 2,498 (a)(b) Pre-tax operating margin (c) 33 % 29 % N/M 32 % Average assets $ 253,031 $ 31,212 $ 55,132 $ 339,375 (a) Both total fee and other revenue and total revenue include net income from consolidated investment management funds of $22 million , representing $43 million of income and noncontrolling interests of $21 million . Income before taxes is net of noncontrolling interests of $21 million . (b) Noninterest expense includes a loss attributable to noncontrolling interest of $5 million related to other consolidated subsidiaries. (c) Income before taxes divided by total revenue. N/M - Not meaningful.

Supplemental information to t48

Supplemental information to the Consolidated Statement of Cash Flows (Tables)	6 Months Ended
	Jun. 30, 2018
Supplemental Cash Flow Information [Abstract]
Noncash Investing and Financing Transactions that are Not Reflected in Consolidated Statement of Cash Flows	Non-cash investing and financing transactions that, appropriately, are not reflected in the consolidated statement of cash flows are listed below. Non-cash investing and financing transactions Six months ended June 30, (in millions) 2018 2017 Transfers from loans to other assets for other real estate owned $ 2 $ 2 Change in assets of consolidated VIEs 303 529 Change in liabilities of consolidated VIEs 1 293 Change in nonredeemable noncontrolling interests of consolidated investment management funds 264 275 Securities purchased not settled 400 853 Securities sold not settled — 1 Securities matured not settled 25 — Available-for-sale securities transferred to trading assets 963 — Held-to-maturity securities transferred to available-for-sale 1,087 — Premises and equipment/capitalized software funded by capital lease obligations 15 345

Accounting changes and new ac49

Accounting changes and new accounting guidance - Narrative (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Held-to-maturity securities transferred to available-for-sale, amortized cost			$ 1,117				$ 1,100
Pre-tax adjustment to other comprehensive income					$ 47
Staff expense	[1]	$ 1,489	1,576	$ 1,432	3,065	$ 2,920
Cash segregated under federal or other regulations		1,659		3,200	1,659	3,200		$ 1,751
Change in interest-bearing deposits with the Federal Reserve and other central banks					15,583	(13,836)
Change in accruals and other, net	[2]				(712)	(4,687)
Retained earnings		27,306			27,306		25,580	25,635
Available-for-sale securities transferred to trading assets							1,000
Equity securities without readily determinable fiar value		53	47		53
Securities without readily determinable fair value, upward price adjustment		$ 5	$ 20
ASU 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment for the cumulative affect of applying the ASU								25
ASU 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Staff expense				$ 16		32
ASU 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in interest-bearing deposits with the Federal Reserve and other central banks					92	221
ASU 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in accruals and other, net					$ 19	$ 19
ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment for the cumulative affect of applying the ASU								(55)
ASU 2014-09 | Impact of adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings							$ (55)
Retained earnings | ASU 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment for the cumulative affect of applying the ASU								27
Retained earnings | ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment for the cumulative affect of applying the ASU								$ (55)
[1]	In the first quarter of 2018, we adopted new accounting guidance included in ASU 2017-07, Compensation-Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, which required the reclassification of the components of pension and other postretirement costs, other than the service cost component. As a result, staff expense increased and other expense decreased. Prior periods have been reclassified. See Note 2 of the Notes to Consolidated Financial Statements for additional information.
[2]	Reflects the impact of adopting new accounting guidance included in ASU 2016-15 and ASU 2016-18. Prior periods have been restated. See Note 2 of the Notes to Consolidated Financial Statements for additional information.

Accounting changes and new ac50

Accounting changes and new accounting guidance - Cumulative Effect of Adoption of New Guidance (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Other assets	$ 22,507	$ 23,020	$ 23,029
Accrued taxes and other expenses		6,207	6,225
Other liabilities		6,114	6,050
Retained earnings	$ 27,306	25,580	$ 25,635
Impact of adoption | ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Other assets		(9)
Accrued taxes and other expenses		(18)
Other liabilities		64
Retained earnings		$ (55)

Acquisitions and dispositions (

Acquisitions and dispositions (Details) - USD ($)	Jun. 29, 2018	Jan. 02, 2018	Jun. 30, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Contingent payments			$ 0	$ 0
Potential obligation to pay additional consideration, lower range			0	0
Potential obligation to pay additional consideration, upper range			$ 7,000,000	$ 7,000,000
Contingent consideration payment period				2 years
Goodwill written off				$ 65,000,000
CenterSquare
Business Acquisition [Line Items]
Assets under management divested		$ 10,000,000,000
Goodwill written off		$ 52,000,000
Amherst Capital Management LLC
Business Acquisition [Line Items]
Goodwill written off	$ 13,000,000

Securities - Amortized Cost, Gr

Securities - Amortized Cost, Gross Unrealized Gains and Losses and Fair Value (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Gain (Loss) on Investments [Line Items]
Amortized cost	$ 119,587	$ 119,993
Gross unrealized Gains	721	1,096
Gross unrealized Losses	2,180	1,034
Fair value	118,128	120,055
AOCI, transfers from AFS to HTM Securities, gross unrealized gains	44	50
AOCI, transfers from AFS to HTM Securities, gross unrealized losses	100	144
Available-for-sale
Gain (Loss) on Investments [Line Items]
Amortized cost	84,446	79,166
Gross unrealized Gains	675	1,000
Gross unrealized Losses	1,181	623
Fair value	83,940	79,543
Available-for-sale | U.S. Treasury
Gain (Loss) on Investments [Line Items]
Amortized cost	19,063	15,159
Gross unrealized Gains	99	264
Gross unrealized Losses	307	160
Fair value	18,855	15,263
Available-for-sale | U.S. government agencies
Gain (Loss) on Investments [Line Items]
Amortized cost	1,481	917
Gross unrealized Gains	0	1
Gross unrealized Losses	34	10
Fair value	1,447	908
Available-for-sale | State and political subdivisions
Gain (Loss) on Investments [Line Items]
Amortized cost	2,636	2,949
Gross unrealized Gains	23	31
Gross unrealized Losses	29	23
Fair value	2,630	2,957
Available-for-sale | Agency RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	25,159	24,002
Gross unrealized Gains	89	108
Gross unrealized Losses	445	291
Fair value	24,803	23,819
Available-for-sale | Non-agency RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	1,229	1,265
Gross unrealized Gains	285	317
Gross unrealized Losses	7	4
Fair value	1,507	1,578
Available-for-sale | Non-agency RMBS | Grantor Trust
Gain (Loss) on Investments [Line Items]
Fair value	943	1,091
Available-for-sale | Other RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost		152
Gross unrealized Gains		3
Gross unrealized Losses		6
Fair value		149
Available-for-sale | Non-agency commercial MBS
Gain (Loss) on Investments [Line Items]
Amortized cost	1,403	1,360
Gross unrealized Gains	1	6
Gross unrealized Losses	26	6
Fair value	1,378	1,360
Available-for-sale | Agency commercial MBS
Gain (Loss) on Investments [Line Items]
Amortized cost	9,775	8,793
Gross unrealized Gains	11	36
Gross unrealized Losses	220	67
Fair value	9,566	8,762
Available-for-sale | CLOs
Gain (Loss) on Investments [Line Items]
Amortized cost	3,179	2,898
Gross unrealized Gains	4	12
Gross unrealized Losses	6	1
Fair value	3,177	2,909
Available-for-sale | Other asset-backed securities
Gain (Loss) on Investments [Line Items]
Amortized cost		1,040
Gross unrealized Gains		3
Gross unrealized Losses		0
Fair value		1,043
Available-for-sale | Foreign covered bonds
Gain (Loss) on Investments [Line Items]
Amortized cost	2,898	2,520
Gross unrealized Gains	13	18
Gross unrealized Losses	18	9
Fair value	2,893	2,529
Available-for-sale | Corporate bonds
Gain (Loss) on Investments [Line Items]
Amortized cost	1,167	1,249
Gross unrealized Gains	9	17
Gross unrealized Losses	30	11
Fair value	1,146	1,255
Available-for-sale | Sovereign debt/sovereign guaranteed
Gain (Loss) on Investments [Line Items]
Amortized cost	11,986	12,405
Gross unrealized Gains	136	175
Gross unrealized Losses	36	23
Fair value	12,086	12,557
Available-for-sale | Other debt securities
Gain (Loss) on Investments [Line Items]
Amortized cost	4,470	3,494
Gross unrealized Gains	5	9
Gross unrealized Losses	23	12
Fair value	4,452	3,491
Available-for-sale | Money market funds
Gain (Loss) on Investments [Line Items]
Amortized cost		963
Gross unrealized Gains		0
Gross unrealized Losses		0
Fair value		963
Held-to-maturity
Gain (Loss) on Investments [Line Items]
Amortized cost	35,141	40,827
Gross unrealized Gains	46	96
Gross unrealized Losses	999	411
Fair value	34,188	40,512
Held-to-maturity | U.S. Treasury
Gain (Loss) on Investments [Line Items]
Amortized cost	5,043	9,792
Gross unrealized Gains	2	6
Gross unrealized Losses	116	56
Fair value	4,929	9,742
Held-to-maturity | U.S. government agencies
Gain (Loss) on Investments [Line Items]
Amortized cost	1,803	1,653
Gross unrealized Gains	0	0
Gross unrealized Losses	17	12
Fair value	1,786	1,641
Held-to-maturity | State and political subdivisions
Gain (Loss) on Investments [Line Items]
Amortized cost	17	17
Gross unrealized Gains	0	0
Gross unrealized Losses	1	1
Fair value	16	16
Held-to-maturity | Agency RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	25,747	26,208
Gross unrealized Gains	10	51
Gross unrealized Losses	818	332
Fair value	24,939	25,927
Held-to-maturity | Non-agency RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost	111	57
Gross unrealized Gains	4	5
Gross unrealized Losses	1	0
Fair value	114	62
Held-to-maturity | Other RMBS
Gain (Loss) on Investments [Line Items]
Amortized cost		65
Gross unrealized Gains		0
Gross unrealized Losses		1
Fair value		64
Held-to-maturity | Non-agency commercial MBS
Gain (Loss) on Investments [Line Items]
Amortized cost		6
Gross unrealized Gains		0
Gross unrealized Losses		0
Fair value		6
Held-to-maturity | Agency commercial MBS
Gain (Loss) on Investments [Line Items]
Amortized cost	1,321	1,324
Gross unrealized Gains	0	2
Gross unrealized Losses	46	9
Fair value	1,275	1,317
Held-to-maturity | Foreign covered bonds
Gain (Loss) on Investments [Line Items]
Amortized cost	82	84
Gross unrealized Gains	1	2
Gross unrealized Losses	0	0
Fair value	83	86
Held-to-maturity | Sovereign debt/sovereign guaranteed
Gain (Loss) on Investments [Line Items]
Amortized cost	990	1,593
Gross unrealized Gains	29	30
Gross unrealized Losses	0	0
Fair value	1,019	1,623
Held-to-maturity | Other debt securities
Gain (Loss) on Investments [Line Items]
Amortized cost	27	28
Gross unrealized Gains	0	0
Gross unrealized Losses	0	0
Fair value	$ 27	$ 28

Securities - Net Securities Gai

Securities - Net Securities Gains (Losses) (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Securities [Abstract]
Realized gross gains	$ 2	$ 2	$ 3	$ 4	$ 14
Realized gross losses	(1)	(51)	(2)	(52)	(2)
Recognized gross impairments	0	0	(1)	0	(2)
Net securities gains (losses)	$ 1	$ (49)	$ 0	$ (48)	$ 10

Securities - Fair Value of Inve

Securities - Fair Value of Investments with Continuous Unrealized Loss Position (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	$ 58,033	$ 43,557
Less than 12 months Unrealized losses	1,211	403
12 months or more Fair value	22,585	27,844
12 months or more Unrealized losses	969	631
Total Fair value	80,618	71,401
Total Unrealized losses	2,180	1,034
AOCI, transfers from AFS to HTM Securities, gross unrealized losses, greater than 12 months	100	144
AOCI, transfers from AFS to HTM Securities, gross unrealized losses, less than 12 months	0	0
Available-for-sale
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	37,938	26,182
Less than 12 months Unrealized losses	651	270
12 months or more Fair value	11,703	11,666
12 months or more Unrealized losses	530	353
Total Fair value	49,641	37,848
Total Unrealized losses	1,181	623
Available-for-sale | U.S. Treasury
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	10,447	7,429
Less than 12 months Unrealized losses	140	131
12 months or more Fair value	3,550	2,175
12 months or more Unrealized losses	167	29
Total Fair value	13,997	9,604
Total Unrealized losses	307	160
Available-for-sale | U.S. government agencies
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	1,140	588
Less than 12 months Unrealized losses	29	6
12 months or more Fair value	119	160
12 months or more Unrealized losses	5	4
Total Fair value	1,259	748
Total Unrealized losses	34	10
Available-for-sale | State and political subdivisions
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	488	732
Less than 12 months Unrealized losses	6	3
12 months or more Fair value	470	518
12 months or more Unrealized losses	23	20
Total Fair value	958	1,250
Total Unrealized losses	29	23
Available-for-sale | Agency RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	10,909	8,567
Less than 12 months Unrealized losses	209	66
12 months or more Fair value	4,821	5,834
12 months or more Unrealized losses	236	225
Total Fair value	15,730	14,401
Total Unrealized losses	445	291
Available-for-sale | Non-agency RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	96	20
Less than 12 months Unrealized losses	3	0
12 months or more Fair value	156	149
12 months or more Unrealized losses	4	4
Total Fair value	252	169
Total Unrealized losses	7	4
Available-for-sale | Non-agency RMBS | Grantor Trust
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	15	7
Less than 12 months Unrealized losses	1	1
12 months or more Fair value	5	12
12 months or more Unrealized losses	1	1
Available-for-sale | Other RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value		71
Less than 12 months Unrealized losses		4
12 months or more Fair value		45
12 months or more Unrealized losses		2
Total Fair value		116
Total Unrealized losses		6
Available-for-sale | Non-agency commercial MBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	955	476
Less than 12 months Unrealized losses	21	3
12 months or more Fair value	115	122
12 months or more Unrealized losses	5	3
Total Fair value	1,070	598
Total Unrealized losses	26	6
Available-for-sale | Agency commercial MBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	5,541	3,077
Less than 12 months Unrealized losses	159	28
12 months or more Fair value	1,062	1,332
12 months or more Unrealized losses	61	39
Total Fair value	6,603	4,409
Total Unrealized losses	220	67
Available-for-sale | CLOs
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	1,292	260
Less than 12 months Unrealized losses	6	1
12 months or more Fair value	45	0
12 months or more Unrealized losses	0	0
Total Fair value	1,337	260
Total Unrealized losses	6	1
Available-for-sale | Foreign covered bonds
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	1,197	953
Less than 12 months Unrealized losses	12	7
12 months or more Fair value	281	116
12 months or more Unrealized losses	6	2
Total Fair value	1,478	1,069
Total Unrealized losses	18	9
Available-for-sale | Corporate bonds
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	707	274
Less than 12 months Unrealized losses	28	2
12 months or more Fair value	49	288
12 months or more Unrealized losses	2	9
Total Fair value	756	562
Total Unrealized losses	30	11
Available-for-sale | Sovereign debt/sovereign guaranteed
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	2,647	1,880
Less than 12 months Unrealized losses	23	12
12 months or more Fair value	626	559
12 months or more Unrealized losses	13	11
Total Fair value	3,273	2,439
Total Unrealized losses	36	23
Available-for-sale | Other debt securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	2,519	1,855
Less than 12 months Unrealized losses	15	7
12 months or more Fair value	409	368
12 months or more Unrealized losses	8	5
Total Fair value	2,928	2,223
Total Unrealized losses	23	12
Held-to-maturity
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	20,095	17,375
Less than 12 months Unrealized losses	560	133
12 months or more Fair value	10,882	16,178
12 months or more Unrealized losses	439	278
Total Fair value	30,977	33,553
Total Unrealized losses	999	411
Held-to-maturity | U.S. Treasury
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	3,591	6,389
Less than 12 months Unrealized losses	80	41
12 months or more Fair value	1,136	2,909
12 months or more Unrealized losses	36	15
Total Fair value	4,727	9,298
Total Unrealized losses	116	56
Held-to-maturity | U.S. government agencies
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	554	791
Less than 12 months Unrealized losses	10	4
12 months or more Fair value	856	850
12 months or more Unrealized losses	7	8
Total Fair value	1,410	1,641
Total Unrealized losses	17	12
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	4
12 months or more Unrealized losses	1	1
Total Fair value	4	4
Total Unrealized losses	1	1
Held-to-maturity | Agency RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	14,697	9,458
Less than 12 months Unrealized losses	428	81
12 months or more Fair value	8,805	12,305
12 months or more Unrealized losses	390	251
Total Fair value	23,502	21,763
Total Unrealized losses	818	332
Held-to-maturity | Non-agency RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	36
Less than 12 months Unrealized losses	0
12 months or more Fair value	24
12 months or more Unrealized losses	1
Total Fair value	60
Total Unrealized losses	1	0
Held-to-maturity | Other RMBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value		0
Less than 12 months Unrealized losses		0
12 months or more Fair value		50
12 months or more Unrealized losses		1
Total Fair value		50
Total Unrealized losses		1
Held-to-maturity | Non-agency commercial MBS
Investments, Unrealized Loss Position [Line Items]
Total Unrealized losses		0
Held-to-maturity | Agency commercial MBS
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair value	1,217	737
Less than 12 months Unrealized losses	42	7
12 months or more Fair value	57	60
12 months or more Unrealized losses	4	2
Total Fair value	1,274	797
Total Unrealized losses	46	9
Held-to-maturity | Foreign covered bonds
Investments, Unrealized Loss Position [Line Items]
Total Unrealized losses	0	0
Held-to-maturity | Sovereign debt/sovereign guaranteed
Investments, Unrealized Loss Position [Line Items]
Total Unrealized losses	0	0
Held-to-maturity | Other debt securities
Investments, Unrealized Loss Position [Line Items]
Total Unrealized losses	$ 0	$ 0

Securities - Maturity Distribut

Securities - Maturity Distribution and Yield of Investment Securities Portfolio (Detail) $ in Millions	Jun. 30, 2018USD ($)
Securities available-for-sale:
One year or less	$ 12,440
Over 1 through 5 years	20,565
Over 5 through 10 years	6,476
Over 10 years	3,773
Total	83,940
Securities held-to-maturity:
One year or less	1,344
Over 1 through 5 years	5,423
Over 5 through 10 years	1,181
Over 10 years	14
Total	35,141
Mortgage-backed securities
Securities available-for-sale:
Without single maturity date	37,254
Securities held-to-maturity:
Mortgage-backed securities	27,179
Asset-backed securities
Securities available-for-sale:
Without single maturity date	3,432
U.S. Treasury
Securities available-for-sale:
One year or less	6,518
Over 1 through 5 years	6,395
Over 5 through 10 years	2,556
Over 10 years	3,386
Total	$ 18,855
Securities available-for-sale (Yield):
One year or less	1.82%
Over 1 through 5 years	1.97%
Over 5 through 10 years	2.21%
Over 10 years	3.11%
Total	2.16%
Securities held-to-maturity:
One year or less	$ 577
Over 1 through 5 years	3,807
Over 5 through 10 years	659
Over 10 years	0
Total	$ 5,043
Securities held-to-maturity (Yield):
One year or less	1.18%
Over 1 through 5 years	1.81%
Over 5 through 10 years	1.78%
Over 10 years	0.00%
Total	1.74%
U.S. government agencies
Securities available-for-sale:
One year or less	$ 40
Over 1 through 5 years	454
Over 5 through 10 years	953
Over 10 years	0
Total	$ 1,447
Securities available-for-sale (Yield):
One year or less	2.17%
Over 1 through 5 years	2.18%
Over 5 through 10 years	2.72%
Over 10 years	0.00%
Total	2.53%
Securities held-to-maturity:
One year or less	$ 631
Over 1 through 5 years	1,172
Over 5 through 10 years	0
Over 10 years	0
Total	$ 1,803
Securities held-to-maturity (Yield):
One year or less	1.18%
Over 1 through 5 years	2.23%
Over 5 through 10 years	0.00%
Over 10 years	0.00%
Total	1.86%
State and political subdivisions
Securities available-for-sale:
One year or less	$ 438
Over 1 through 5 years	1,352
Over 5 through 10 years	645
Over 10 years	195
Total	$ 2,630
Securities available-for-sale (Yield):
One year or less	2.14%
Over 1 through 5 years	2.94%
Over 5 through 10 years	2.67%
Over 10 years	2.87%
Total	2.74%
Securities held-to-maturity:
One year or less	$ 0
Over 1 through 5 years	2
Over 5 through 10 years	1
Over 10 years	14
Total	$ 17
Securities held-to-maturity (Yield):
One year or less	0.00%
Over 1 through 5 years	5.66%
Over 5 through 10 years	5.78%
Over 10 years	4.76%
Total	4.94%
Other bonds, notes and debentures
Securities available-for-sale:
One year or less	$ 5,444
Over 1 through 5 years	12,364
Over 5 through 10 years	2,322
Over 10 years	192
Total	$ 20,322
Securities available-for-sale (Yield):
One year or less	1.22%
Over 1 through 5 years	1.17%
Over 5 through 10 years	0.84%
Over 10 years	1.66%
Total	1.18%
Securities held-to-maturity:
One year or less	$ 136
Over 1 through 5 years	442
Over 5 through 10 years	521
Over 10 years	0
Total	$ 1,099
Securities held-to-maturity (Yield):
One year or less	0.83%
Over 1 through 5 years	0.46%
Over 5 through 10 years	0.85%
Over 10 years	0.00%
Total	0.69%
Mortgage/ asset-backed
Securities available-for-sale:
Total	$ 40,686
Securities available-for-sale (Yield):
Total	3.11%
Securities held-to-maturity:
Total	$ 27,179
Securities held-to-maturity (Yield):
Total	2.85%
Mortgage/ asset-backed | Mortgage-backed securities
Securities available-for-sale:
Without single maturity date	$ 37,254
Securities available-for-sale (Yield):
Without single maturity date	3.11%
Securities held-to-maturity:
Mortgage-backed securities	$ 27,179
Securities held-to-maturity (Yield):
Without single maturity date	2.85%
Mortgage/ asset-backed | Asset-backed securities
Securities available-for-sale:
Without single maturity date	$ 3,432
Securities available-for-sale (Yield):
Without single maturity date	3.03%

Securities - Projected Weighted

Securities - Projected Weighted-Average Default Rates and Loss Severities (Detail) - Recent Vintage	Jun. 30, 2018	Dec. 31, 2017
Alt-A
Gain (Loss) on Investments [Line Items]
Default rate	21.00%	22.00%
Severity	52.00%	53.00%
Subprime
Gain (Loss) on Investments [Line Items]
Default rate	36.00%	38.00%
Severity	65.00%	66.00%
Prime
Gain (Loss) on Investments [Line Items]
Default rate	12.00%	13.00%
Severity	40.00%	39.00%

Securities - Pre-Tax Net Securi

Securities - Pre-Tax Net Securities Gains (Losses) by Type (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net securities gains (losses)	$ 1	$ (49)	$ 0	$ (48)	$ 10
Agency RMBS
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net securities gains (losses)	0	(42)	0	(42)	1
U.S. Treasury
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net securities gains (losses)	0	(4)	(1)	(4)	(1)
Non-agency RMBS
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net securities gains (losses)	0	0	0	0	(1)
Other
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net securities gains (losses)	$ 1	$ (3)	$ 1	$ (2)	$ 11

Securities - Debt Securities Cr

Securities - Debt Securities Credit Losses Roll Forward Recorded in Earnings (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other than Temporary Impairment [Roll Forward]
Beginning balance	$ 80	$ 89	$ 84	$ 88
Add: Initial OTTI credit losses	0	0	0	0
Subsequent OTTI credit losses	0	1	0	2
Less: Realized losses for securities sold	1	5	5	5
Ending balance	$ 79	$ 85	$ 79	$ 85

Securities - Narrative (Details

Securities - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Held-to-maturity securities transferred to available-for-sale, amortized cost		$ 1,117	$ 1,100
Held-to-maturity securities transferred to available-for-sale, fair value		$ 1,070
AOCI, transfers from AFS to HTM Securities, gross unrealized losses	$ 100			$ 144

Securities - Pledged assets (De

Securities - Pledged assets (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Securities [Abstract]
Pledged assets	$ 112,000	$ 111,000
Pledged collateral for potential borrowings at the Federal Reserve Discount Window	92,000	92,000
Pledged asset, other not separately reported, potential borrowings at FHLB	6,000	5,000
Pledged securities	95,000	96,000
Pledged loans	13,000	13,000
Pledged trading assets	3,000	2,000
Pledged interest-bearing deposits	1,000
Financial instruments owned and pledged as collateral, amount eligible to be pledged by counterparty	11,000	10,000
Pledged assets permitted to be sold or repledged	94,000	86,000
Market value of securities received as collateral that have been sold or repledged	62,000	49,000
Cash segregated under federal or other regulations	1,659	1,751	$ 3,200
Securities segregated under federal or other regulations	$ 1,000	$ 1,000

Loans and asset quality - Loan

Loans and asset quality - Loan Distribution and Industry Concentrations (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 57,776		$ 61,540
Unearned income on lease financings	375		394
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,453		2,911
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,979		4,900
Financial institutions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	11,830		13,051
Wealth management loans and mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,301		16,528
Other residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	653		708
Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,000		5,100
Margin loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,100		15,800
Domestic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	47,392		48,895
Domestic | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,117		2,744
Domestic | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,974		4,900
Domestic | Financial institutions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,526		5,568
Domestic | Lease financings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	758		772
Domestic | Wealth management loans and mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,191		16,420
Domestic | Other residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	653		708
Domestic | Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,090	$ 785	963	$ 855
Domestic | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,169	1,089	1,131	1,122
Domestic | Margin loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	14,914	$ 14,993	15,689	$ 13,973
Foreign
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	10,384		12,645
Foreign | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	336		167
Foreign | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5		0
Foreign | Financial institutions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,304		7,483
Foreign | Lease financings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	539		527
Foreign | Wealth management loans and mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	110		108
Foreign | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,947		4,264
Foreign | Margin loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 143		$ 96

Loans and asset quality - Allow

Loans and asset quality - Allowance for Credit Losses Activity (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 256	$ 261	$ 276	$ 261	$ 281
Charge-offs	0	0	0	0	(1)
Recoveries	1	0	1	1	2
Net recoveries	1	0	1	1	1
Provision	(3)	(5)	(7)	(8)	(12)
Ending balance	254	256	270	254	270
Allowance for:
Loan losses	145	156	165	145	165
Lending-related commitments	109	100	105	109	105
Individually evaluated for impairment:
Loan balance	5	5	9	5	9
Allowance for loan losses	0	1	5	0	5
Collectively evaluated for impairment:
Loan balance	57,771	60,804	61,664	57,771	61,664
Allowance for loan losses	145	155	160	145	160
Loans	57,776			57,776		$ 61,540
Domestic
Collectively evaluated for impairment:
Loans	47,392			47,392		48,895
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	75	77	82	77	82
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net recoveries	0	0	0	0	0
Provision	1	(2)	(2)	(1)	(2)
Ending balance	76	75	80	76	80
Allowance for:
Loan losses	17	23	26	17	26
Lending-related commitments	59	52	54	59	54
Individually evaluated for impairment:
Loan balance	0	0	0	0	0
Allowance for loan losses	0	0	0	0	0
Collectively evaluated for impairment:
Loan balance	2,117	2,284	2,580	2,117	2,580
Allowance for loan losses	17	23	26	17	26
Loans	2,453			2,453		2,911
Commercial | Domestic
Collectively evaluated for impairment:
Loans	2,117			2,117		2,744
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	75	76	73	76	73
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net recoveries	0	0	0	0	0
Provision	(1)	(1)	2	(2)	2
Ending balance	74	75	75	74	75
Allowance for:
Loan losses	55	58	55	55	55
Lending-related commitments	19	17	20	19	20
Individually evaluated for impairment:
Loan balance	0	0	0	0	0
Allowance for loan losses	0	0	0	0	0
Collectively evaluated for impairment:
Loan balance	4,974	4,888	5,017	4,974	5,017
Allowance for loan losses	55	58	55	55	55
Loans	4,979			4,979		4,900
Commercial real estate | Domestic
Collectively evaluated for impairment:
Loans	4,974			4,974		4,900
Financial institutions
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	22	23	23	23	26
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net recoveries	0	0	0	0	0
Provision	2	(1)	0	1	(3)
Ending balance	24	22	23	24	23
Allowance for:
Loan losses	8	8	7	8	7
Lending-related commitments	16	14	16	16	16
Individually evaluated for impairment:
Loan balance	0	1	2	0	2
Allowance for loan losses	0	0	2	0	2
Collectively evaluated for impairment:
Loan balance	5,526	5,781	5,952	5,526	5,952
Allowance for loan losses	8	8	5	8	5
Loans	11,830			11,830		13,051
Financial institutions | Domestic
Collectively evaluated for impairment:
Loans	5,526			5,526		5,568
Lease financings
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	7	8	10	8	13
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net recoveries	0	0	0	0	0
Provision	(1)	(1)	0	(2)	(3)
Ending balance	6	7	10	6	10
Allowance for:
Loan losses	6	7	10	6	10
Lending-related commitments	0	0	0	0	0
Individually evaluated for impairment:
Loan balance	0	0	0	0	0
Allowance for loan losses	0	0	0	0	0
Collectively evaluated for impairment:
Loan balance	758	749	847	758	847
Allowance for loan losses	6	7	10	6	10
Lease financings | Domestic
Collectively evaluated for impairment:
Loans	758			758		772
Wealth management loans and mortgages
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	23	22	26	22	23
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net recoveries	0	0	0	0	0
Provision	0	1	(1)	1	2
Ending balance	23	23	25	23	25
Allowance for:
Loan losses	19	19	21	19	21
Lending-related commitments	4	4	4	4	4
Individually evaluated for impairment:
Loan balance	5	4	7	5	7
Allowance for loan losses	0	1	3	0	3
Collectively evaluated for impairment:
Loan balance	16,186	16,284	16,024	16,186	16,024
Allowance for loan losses	19	18	18	19	18
Loans	16,301			16,301		16,528
Wealth management loans and mortgages | Domestic
Collectively evaluated for impairment:
Loans	16,191			16,191		16,420
Other residential mortgages
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	19	20	25	20	28
Charge-offs	0	0	0	0	(1)
Recoveries	1	0	1	1	2
Net recoveries	1	0	1	1	1
Provision	(2)	(1)	(3)	(3)	(6)
Ending balance	18	19	23	18	23
Allowance for:
Loan losses	18	19	23	18	23
Lending-related commitments	0	0	0	0	0
Individually evaluated for impairment:
Loan balance	0	0	0	0	0
Allowance for loan losses	0	0	0	0	0
Collectively evaluated for impairment:
Loan balance	653	680	780	653	780
Allowance for loan losses	18	19	23	18	23
Loans	653			653		708
Other residential mortgages | Domestic
Collectively evaluated for impairment:
Loans	653			653		708
All other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	0	0	0	0	0
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net recoveries	0	0	0	0	0
Provision	0	0	0	0	0
Ending balance	0	0	0	0	0
Allowance for:
Loan losses	0	0	0	0	0
Lending-related commitments	0	0	0	0	0
Individually evaluated for impairment:
Loan balance	0	0	0	0	0
Allowance for loan losses	0	0	0	0	0
Collectively evaluated for impairment:
Loan balance	17,173	16,867	15,950	17,173	15,950
Allowance for loan losses	0	0	0	0	0
Foreign
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	35	35	37	35	36
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Net recoveries	0	0	0	0	0
Provision	(2)	0	(3)	(2)	(2)
Ending balance	33	35	34	33	34
Allowance for:
Loan losses	22	22	23	22	23
Lending-related commitments	11	13	11	11	11
Individually evaluated for impairment:
Loan balance	0	0	0	0	0
Allowance for loan losses	0	0	0	0	0
Collectively evaluated for impairment:
Loan balance	10,384	13,271	14,514	10,384	14,514
Allowance for loan losses	22	22	23	22	23
Overdrafts
Collectively evaluated for impairment:
Loans	4,000			4,000		5,100
Overdrafts | Domestic
Collectively evaluated for impairment:
Loans	1,090	785	855	1,090	855	963
Margin loans
Collectively evaluated for impairment:
Loans	15,100			15,100		15,800
Margin loans | Domestic
Collectively evaluated for impairment:
Loans	14,914	14,993	13,973	14,914	13,973	15,689
Other | Domestic
Collectively evaluated for impairment:
Loans	$ 1,169	$ 1,089	$ 1,122	$ 1,169	$ 1,122	$ 1,131

Loans and asset quality - Nonpe

Loans and asset quality - Nonperforming Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Total nonperforming loans	$ 79	$ 86
Other assets owned	3	4
Total nonperforming assets	82	90
Domestic | Other residential mortgages
Financing Receivable, Impaired [Line Items]
Total nonperforming loans	71	78
Domestic | Wealth management loans and mortgages
Financing Receivable, Impaired [Line Items]
Total nonperforming loans	8	7
Domestic | Commercial real estate
Financing Receivable, Impaired [Line Items]
Total nonperforming loans	$ 0	$ 1

Loans and asset quality - Lost

Loans and asset quality - Lost Interest (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018
Receivables [Abstract]
Amount by which interest income would have increased if nonperforming loans at period-end had been performing for the entire period	$ 1	$ 1	$ 1	$ 2

Loans and asset quality - Impai

Loans and asset quality - Impaired Loans (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Dec. 31, 2017
Receivables [Abstract]
Total impaired loans, average recorded investment (less than $13 million)	$ 13	$ 13	$ 13
Impaired loans with an allowance, related allowance (less than $1 million at June 30, 2018)	$ 1			$ 1

Loans and asset quality - Infor

Loans and asset quality - Information about Past Due Loans (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	$ 202	$ 117
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	168	102
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	28	10
Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	6	5
Domestic | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	129	44
Domestic | Commercial real estate | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	104	44
Domestic | Commercial real estate | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	25	0
Domestic | Commercial real estate | Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	0	0
Domestic | Wealth management loans and mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	18	44
Domestic | Wealth management loans and mortgages | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	17	39
Domestic | Wealth management loans and mortgages | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	1	5
Domestic | Wealth management loans and mortgages | Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	0	0
Domestic | Other residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	31	28
Domestic | Other residential mortgages | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	23	18
Domestic | Other residential mortgages | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	2	5
Domestic | Other residential mortgages | Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	6	5
Domestic | Financial institutions
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	24	1
Domestic | Financial institutions | 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	24	1
Domestic | Financial institutions | 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	0	0
Domestic | Financial institutions | Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loans	$ 0	$ 0

Loans and asset quality - TDRs

Loans and asset quality - TDRs (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017
Receivables [Abstract]
Outstanding recorded investment post-modification (less than)	$ 1	$ 1	$ 4

Loans and asset quality - Credi

Loans and asset quality - Credit Risk Profile by Grade (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 57,776	$ 61,540
Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	2,453	2,911
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	4,979	4,900
Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Loans	11,830	13,051
Wealth management mortgages
Financing Receivable, Recorded Investment [Line Items]
Loans	9,365	9,301
Wealth management loans and mortgages
Financing Receivable, Recorded Investment [Line Items]
Loans	16,301	16,528
Investment grade | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	2,342	2,685
Investment grade | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	4,266	4,277
Investment grade | Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Loans	9,262	10,021
Investment grade | Wealth management loans
Financing Receivable, Recorded Investment [Line Items]
Loans	6,791	7,042
Non-investment grade | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	111	226
Non-investment grade | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	713	623
Non-investment grade | Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Loans	2,568	3,030
Non-investment grade | Wealth management loans
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 145	$ 185

Loans and asset quality - Addit

Loans and asset quality - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)class_of_receivableSegment	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of portfolio segments | Segment	3
Number of classes of financing receivables | class_of_receivable	6
Loans	$ 57,776		$ 61,540
Domestic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	47,392		48,895
Other residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	653		708
Other residential mortgages | Domestic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	653		708
Purchased mortgages	$ 151
Purchased residential mortgages, loan to value ratio	76.00%
Percentage of purchased residential mortgages that were at least 60 days delinquent	12.00%
Wealth management mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan to value ratio at origination	62.00%
Percentage of past due mortgages (less than)	1.00%
Loans	$ 9,365		9,301
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	18.00%
Wealth management mortgages | Massachusetts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentrations	11.00%
Wealth management mortgages | Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentrations	8.00%
Wealth management mortgages | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentrations	39.00%
Wealth management loans and mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 16,301		16,528
Wealth management loans and mortgages | Domestic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,191		16,420
Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 4,000		5,100
Number of business days in which overdrafts are generally repaid	2 days
Overdrafts | Domestic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 1,090	$ 785	963	$ 855
Margin loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,100		15,800
Margin loans | Domestic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 14,914	$ 14,993	$ 15,689	$ 13,973
Margin loans | Domestic | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Required daily collateral margin (in excess of)	100.00%

Goodwill and intangible asset70

Goodwill and intangible assets - Goodwill (Detail)	6 Months Ended
	Jun. 30, 2018USD ($)Segmentreporting_unit	Jun. 30, 2017USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 17,564,000,000	$ 17,316,000,000
Dispositions	(65,000,000)
Foreign currency translation	(81,000,000)	141,000,000
Ending balance	$ 17,418,000,000	17,457,000,000
Number of reportable segments | Segment	3
Number of reporting units | reporting_unit	7
Goodwill impairment	$ 0
Investment Services
Goodwill [Roll Forward]
Beginning balance	8,389,000,000	8,269,000,000
Dispositions	0
Foreign currency translation	(31,000,000)	72,000,000
Ending balance	$ 8,358,000,000	8,341,000,000
Number of reporting units | reporting_unit	4
Investment Management
Goodwill [Roll Forward]
Beginning balance	$ 9,128,000,000	9,000,000,000
Dispositions	(65,000,000)
Foreign currency translation	(50,000,000)	69,000,000
Ending balance	$ 9,013,000,000	9,069,000,000
Number of reporting units | reporting_unit	2
Other
Goodwill [Roll Forward]
Beginning balance	$ 47,000,000	47,000,000
Dispositions	0
Foreign currency translation	0	0
Ending balance	$ 47,000,000	$ 47,000,000
Number of reporting units | reporting_unit	1

Goodwill and intangible asset71

Goodwill and intangible assets - Intangible Assets by Business Segment (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Intangible Assets [Roll Forward]
Beginning Balance		$ 3,411		$ 3,411	$ 3,598
Amortization	$ (48)	(49)	$ (53)	(97)	(105)
Foreign currency translation				(6)	13
Ending Balance	3,308		3,506	3,308	3,506
Investment Services
Intangible Assets [Roll Forward]
Beginning Balance		888		888	1,032
Amortization				(72)	(75)
Foreign currency translation				(1)	3
Ending Balance	815		960	815	960
Investment Management
Intangible Assets [Roll Forward]
Beginning Balance		1,674		1,674	1,717
Amortization				(25)	(30)
Foreign currency translation				(5)	10
Ending Balance	1,644		1,697	1,644	1,697
Other
Intangible Assets [Roll Forward]
Beginning Balance		$ 849		849	849
Amortization				0	0
Foreign currency translation				0	0
Ending Balance	$ 849		$ 849	$ 849	$ 849

Goodwill and intangible asset72

Goodwill and intangible assets - Intangible Assets by Type (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 6,162	$ 6,193
Accumulated amortization	(2,854)	(2,782)
Net carrying amount	3,308	3,411	$ 3,506	$ 3,598
Finite-lived Intangible Assets
Intangible Assets by Major Class [Line Items]
Gross carrying amount	3,537	3,564
Accumulated amortization	(2,854)	(2,782)
Net carrying amount	$ 683	782
Finite-lived Intangible Assets | Weighted Average
Intangible Assets by Major Class [Line Items]
Remaining weighted- average amortization period	10 years
Finite-lived Intangible Assets | Customer contracts—Investment Services
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 2,255	2,260
Accumulated amortization	(1,811)	(1,744)
Net carrying amount	$ 444	516
Finite-lived Intangible Assets | Customer contracts—Investment Services | Weighted Average
Intangible Assets by Major Class [Line Items]
Remaining weighted- average amortization period	10 years
Finite-lived Intangible Assets | Customer relationships
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 1,253	1,262
Accumulated amortization	(1,030)	(1,015)
Net carrying amount	$ 223	247
Finite-lived Intangible Assets | Customer relationships | Weighted Average
Intangible Assets by Major Class [Line Items]
Remaining weighted- average amortization period	11 years
Finite-lived Intangible Assets | Other
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 29	42
Accumulated amortization	(13)	(23)
Net carrying amount	$ 16	19
Finite-lived Intangible Assets | Other | Weighted Average
Intangible Assets by Major Class [Line Items]
Remaining weighted- average amortization period	4 years
Indefinite-lived Intangible Assets
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 2,625	2,629
Net carrying amount	2,625	2,629
Indefinite-lived Intangible Assets | Tradenames
Intangible Assets by Major Class [Line Items]
Gross carrying amount	1,333	1,334
Net carrying amount	1,333	1,334
Indefinite-lived Intangible Assets | Customer relationships
Intangible Assets by Major Class [Line Items]
Gross carrying amount	1,292	1,295
Net carrying amount	$ 1,292	$ 1,295

Goodwill and intangible asset73

Goodwill and intangible assets - Estimated Annual Amortization Expense (Detail) $ in Millions	Jun. 30, 2018USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,018	$ 180
2,019	116
2,020	102
2,021	79
2,022	$ 60

Other assets - Components of Ot

Other assets - Components of Other Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Other Assets [Abstract]
Corporate/bank-owned life insurance	$ 4,876		$ 4,857
Accounts receivable	3,675		4,590
Fails to deliver	3,073		2,817
Software	1,550		1,499
Prepaid pension assets	1,511		1,416
Renewable energy investments	1,324		1,368
Income taxes receivable	1,225		1,533
Equity in a joint venture and other investments	1,112		1,083
Qualified affordable housing project investments	1,054		1,014
Prepaid expense	502		395
Federal Reserve Bank stock	482		477
Fair value of hedging derivatives	313		323
Seed capital	302		288
Other	1,508		1,369
Total other assets	22,507	$ 23,020	23,029
Federal Home Loan Bank stock, at cost	$ 93		$ 82

Other assets - Qualified Afford

Other assets - Qualified Affordable Housing Project Investments (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Other Assets [Abstract]
Qualified affordable housing project investments	$ 1,054			$ 1,054		$ 1,014
Qualified affordable housing project investments, commitment	498			498		$ 486
Qualified affordable housing project commitment - 2018	113			113
Qualified affordable housing project commitment - 2019	120			120
Qualified affordable housing project commitment - 2020	119			119
Qualified affordable housing project commitment - 2021	99			99
Qualified affordable housing project commitment - 2022	29			29
Qualified affordable housing project commitment - 2023 and thereafter	18			18
Tax credits and other tax benefits	42	$ 40	$ 38	82	$ 76
Amortization expense included in the provision for income taxes	$ 35	$ 33	$ 28	$ 68	$ 55

Other assets - Seed Capital and

Other assets - Seed Capital and Private Equity Investments (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Fair value	$ 185	$ 154
Unfunded commitments	46	43
Seed capital
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Fair value	44	40
Unfunded commitments	$ 0	$ 1
Redemption frequency	Daily-quarterly	Daily-quarterly
Private equity investments
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Fair value	$ 68	$ 55
Unfunded commitments	46	42
Other corporate investments
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Fair value	73	59
Unfunded commitments	$ 0	$ 0
Redemption frequency	Daily-quarterly	Daily-quarterly
Minimum | Seed capital
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Redemption notice period	1 day	1 day
Minimum | Other corporate investments
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Redemption notice period	1 day	1 day
Maximum | Seed capital
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Redemption notice period	90 days	90 days
Maximum | Other corporate investments
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Redemption notice period	95 days	95 days

Contract revenue - Disaggregati

Contract revenue - Disaggregation of Contract Revenues (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	$ 2,894	$ 2,981		$ 5,875
Fee and other revenue - not in scope of ASC 606	321	289		610
Noninterest Income	3,215	3,270		6,485
Income from consolidated investment management funds, net of noncontrolling interests	1,103	1,171	$ 975	2,274	$ 1,897
Asset servicing
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	1,120	1,142		2,262
Clearing services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	392	414		806
Issuer services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	265	260		525
Treasury services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	141	138		279
Total investment services fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	1,918	1,954		3,872
Investment management and performance fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	907	956		1,863
Financing-related fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	15	17		32
Distribution and servicing
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	34	36		70
Investment and other income
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	20	18		38
Investment Services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	1,979	2,014		3,993
Fee and other revenue - not in scope of ASC 606	254	236		490
Noninterest Income	2,233	2,250		4,483
Investment Services | Asset servicing
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	1,098	1,117		2,215
Investment Services | Clearing services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	392	413		805
Investment Services | Issuer services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	265	260		525
Investment Services | Treasury services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	140	138		278
Investment Services | Total investment services fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	1,895	1,928		3,823
Investment Services | Investment management and performance fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	14	14		28
Investment Services | Financing-related fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	15	17		32
Investment Services | Distribution and servicing
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	(14)	(14)		(28)
Investment Services | Investment and other income
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	69	69		138
Investment Management
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	913	966		1,879
Fee and other revenue - not in scope of ASC 606	28	46		74
Noninterest Income	941	1,012		1,953
Investment Management | Operating segments
Disaggregation of Revenue [Line Items]
Income from consolidated investment management funds, net of noncontrolling interests	5	1	$ 7	5	$ 22
Investment Management | Asset servicing
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	21	25		46
Investment Management | Clearing services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	0	0		0
Investment Management | Issuer services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	0	0		0
Investment Management | Treasury services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	1	0		1
Investment Management | Total investment services fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	22	25		47
Investment Management | Investment management and performance fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	893	942		1,835
Investment Management | Financing-related fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	0	0		0
Investment Management | Distribution and servicing
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	48	50		98
Investment Management | Investment and other income
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	(50)	(51)		(101)
Other
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	2	1		3
Fee and other revenue - not in scope of ASC 606	39	7		46
Noninterest Income	41	8		49
Other | Asset servicing
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	1	0		1
Other | Clearing services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	0	1		1
Other | Issuer services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	0	0		0
Other | Treasury services
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	0	0		0
Other | Total investment services fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	1	1		2
Other | Investment management and performance fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	0	0		0
Other | Financing-related fees
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	0	0		0
Other | Distribution and servicing
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	0	0		0
Other | Investment and other income
Disaggregation of Revenue [Line Items]
Total fee revenue - contract revenue	$ 1	$ 0		$ 1

Contract revenue - Additional I

Contract revenue - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jan. 01, 2018
Revenue from Contract with Customer [Abstract]
Contract with customer, asset	$ 2,400,000,000	$ 2,400,000,000	$ 3,900,000,000
Provision for allowances	4,000,000	6,000,000
Contract assets representing accrued revenues not yet billed	65,000,000	65,000,000	30,000,000
Impairment of contract assets	0
Contract with customer, liability	193,000,000	193,000,000	$ 167,000,000
Contract with customer, liability, revenue recognized	53,000,000	70,000,000
Capitalized Contract Cost [Line Items]
Capitalized contract cost, impairment	0
Incremental costs for obtaining contracts
Capitalized Contract Cost [Line Items]
Capitalized contract costs	109,000,000	$ 109,000,000
Capitalized contract cost, recognition period		9 years
Capitalized contract cost, amortization	6,000,000	$ 11,000,000
Costs to fulfill contract
Capitalized Contract Cost [Line Items]
Capitalized contract costs	14,000,000	14,000,000
Capitalized contract cost, amortization	$ 2,000,000	$ 3,000,000
Costs to fulfill contract | Minimum
Capitalized Contract Cost [Line Items]
Capitalized contract cost, recognition period		7 years
Costs to fulfill contract | Maximum
Capitalized Contract Cost [Line Items]
Capitalized contract cost, recognition period		9 years

Net interest revenue (Details)

Net interest revenue (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest revenue
Non-margin loans	$ 345	$ 305	$ 272	$ 650	$ 517
Margin loans	128	115	87	243	162
Securities:
Taxable	615	581	476	1,196	937
Exempt from federal income taxes	14	15	16	29	33
Total securities	629	596	492	1,225	970
Deposits with banks	56	42	27	98	49
Deposits with the Federal Reserve and other central banks	136	126	71	262	128
Federal funds sold and securities purchased under resale agreements	230	170	86	400	153
Trading assets	29	27	17	56	33
Total interest revenue	1,553	1,381	1,052	2,934	2,012
Interest expense
Deposits	173	117	32	290	41
Federal funds purchased and securities sold under repurchase agreements	158	107	38	265	62
Trading liabilities	7	9	2	16	4
Other borrowed funds	14	9	4	23	6
Commercial paper	21	12	5	33	10
Customer payables	45	31	16	76	23
Long-term debt	219	177	129	396	248
Total interest expense	637	462	226	1,099	394
Net interest revenue	916	919	826	1,835	1,618
Provision	(3)	(5)	(7)	(8)	(12)
Net interest revenue after provision for credit losses	$ 919	$ 924	$ 833	$ 1,843	$ 1,630

Employee benefit plans (Details

Employee benefit plans (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Health care benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0	$ 0
Interest cost	2	2	2	4	4
Expected return on assets	(2)	(2)	(2)	(4)	(4)
Other	0	(1)	(1)	(1)	(2)
Net periodic benefit (credit) cost	0	(1)	(1)	(1)	(2)
Domestic pension benefits | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0	0
Interest cost	42	43	45	85	90
Expected return on assets	(85)	(85)	(81)	(170)	(162)
Other	17	17	17	34	34
Net periodic benefit (credit) cost	(26)	(25)	(19)	(51)	(38)
Foreign pension benefits | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	7	7	14	14
Interest cost	8	8	8	16	16
Expected return on assets	(14)	(15)	(12)	(29)	(24)
Other	6	6	9	12	18
Net periodic benefit (credit) cost	$ 7	$ 6	$ 12	$ 13	$ 24

Income taxes (Details)

Income taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 286	$ 282	$ 332	$ 568	$ 601
Effective tax rate	20.50%	19.50%	25.40%
Tax reserves	$ 101	$ 130		101
Impact on effective tax rate if tax reserves were unnecessary	101			101
Accrued interest, related to income taxes in the balance sheet	16			16
Additional tax expense related to interest				2	$ 4
Reasonably possible decrease in uncertain tax positions within the next 12 months, if a re-evaluation is required	$ 7			$ 7

Variable interest entities an82

Variable interest entities and securitization - Assets and Liabilities of VIEs (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Nonredeemable noncontrolling interests of consolidated investment management funds	$ 52	$ 316
VME classification of carrying amount, assets	295	84
VME classification of carrying amount, liabilities	3	1
Noncontrolling interest in VME	1	1
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Available-for-sale	0	400
Trading assets	575	516
Other assets, fair value	253	215
Total assets	828	1,131
Other liabilities	366	369
Subtotal liabilities	366	369
Nonredeemable noncontrolling interests of consolidated investment management funds	52	316
Variable Interest Entity, Primary Beneficiary | Investment Management funds
Variable Interest Entity [Line Items]
Available-for-sale	0	0
Trading assets	175	516
Other assets, fair value	253	215
Total assets	428	731
Other liabilities	3	2
Subtotal liabilities	3	2
Nonredeemable noncontrolling interests of consolidated investment management funds	52	316
Variable Interest Entity, Primary Beneficiary | Securitization
Variable Interest Entity [Line Items]
Available-for-sale	0	400
Trading assets	400	0
Other assets, fair value	0	0
Total assets	400	400
Other liabilities	363	367
Subtotal liabilities	363	367
Nonredeemable noncontrolling interests of consolidated investment management funds	$ 0	$ 0

Variable interest entities an83

Variable interest entities and securitization - Non-consolidated VIEs (Detail) - Variable Interest Entity, Not Primary Beneficiary - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Available-for-sale
Variable Interest Entity [Line Items]
Assets	$ 222	$ 203
Liabilities	0	0
Maximum loss exposure	222	203
Other Assets and Liabilities, Net
Variable Interest Entity [Line Items]
Assets	2,603	2,592
Liabilities	498	486
Maximum loss exposure	$ 3,101	$ 3,078

Preferred stock - Summary (Deta

Preferred stock - Summary (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
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 description	Greater of (i) three-month LIBOR plus 0.565% for the related distribution period; or (ii) 4.000%
Per annum dividend rate	4.00%
Total shares issued and outstanding (shares)	5,001	5,001
Carrying value	$ 500	$ 500
Liquidation preference per share (usd per share)	$ 100,000
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%
Total shares issued and outstanding (shares)	5,825	5,825
Carrying value	$ 568	$ 568
Liquidation preference per share (usd per share)	$ 100,000
Series D Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Per annum dividend rate description	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%
Total shares issued and outstanding (shares)	5,000	5,000
Carrying value	$ 494	$ 494
Liquidation preference per share (usd per share)	$ 100,000
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 description	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%
Total shares issued and outstanding (shares)	10,000	10,000
Carrying value	$ 990	$ 990
Liquidation preference per share (usd per share)	$ 100,000
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 description	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%
Total shares issued and outstanding (shares)	10,000	10,000
Carrying value	$ 990	$ 990
Liquidation preference per share (usd per share)	$ 100,000
Series F Noncumulative Perpetual Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred stock, basis spread on variable rate	3.131%

Preferred stock - Narrative (De

Preferred stock - Narrative (Details) - $ / shares	Jun. 20, 2018	Jun. 30, 2018	Dec. 31, 2017
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)	$ 1,022.22
Preferred stock, dividend rate per normal preferred capital security (usd per share)	$ 10.2222
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 D Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Dividend paid per share (usd per share)	$ 2,250
Preferred stock, dividend rate per depository share (usd per share)	$ 22.5
Depository share, portion of preferred stock share	1.00%
Series E Noncumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Dividend paid per share (usd per share)	$ 2,475
Preferred stock, dividend rate per depository share (usd per share)	$ 24.75
Depository share, portion of preferred stock share	1.00%

Other comprehensive income (l86

Other comprehensive income (loss) - Components (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Pre-tax amount
Total other comprehensive income (loss), Pre-tax amount		$ (402)	$ (73)	$ 420	$ (475)	$ 713
Tax (expense) benefit
Total other comprehensive income (loss), Tax (expense) benefit		(60)	94	17	34	(33)
After-tax amount
Total other comprehensive income (loss), net of tax	[1]	(462)	21	437	(441)	680
Foreign currency translation
Pre-tax amount
Other comprehensive income (loss), Pre-tax amount		(302)	201	249	(101)	345
Total other comprehensive income (loss), Pre-tax amount		(302)	201	249	(101)	345
Tax (expense) benefit
Other comprehensive income (loss), Tax (expense) benefit		(98)	43	81	(55)	110
Total other comprehensive income (loss), Tax (expense) benefit		(98)	43	81	(55)	110
After-tax amount
Other comprehensive income (loss), After-tax amount		(400)	244	330	(156)	455
Total other comprehensive income (loss), net of tax		(400)	244	330	(156)	455
Unrealized gain (loss) on assets available-for-sale
Pre-tax amount
Other comprehensive income (loss), Pre-tax amount		(103)	(342)	146	(445)	310
Reclassification adjustment, Pre-tax amount		(1)	49	0	48	(10)
Total other comprehensive income (loss), Pre-tax amount		(104)	(293)	146	(397)	300
Tax (expense) benefit
Other comprehensive income (loss), Tax (expense) benefit		39	67	(55)	106	(125)
Reclassification adjustment, Tax (expense) benefit		1	(12)	(1)	(11)	3
Total other comprehensive income (loss), Tax (expense) benefit		40	55	(56)	95	(122)
After-tax amount
Other comprehensive income (loss), After-tax amount		(64)	(275)	91	(339)	185
Reclassification adjustment, After-tax amount		0	37	(1)	37	(7)
Total other comprehensive income (loss), net of tax		(64)	(238)	90	(302)	178
Defined benefit plans
Pre-tax amount
Total other comprehensive income (loss), Pre-tax amount		22	22	24	44	52
Tax (expense) benefit
Total other comprehensive income (loss), Tax (expense) benefit		(6)	(5)	(8)	(11)	(16)
After-tax amount
Total other comprehensive income (loss), net of tax		16	17	16	33	36
Net gain (loss) arising during the period
Pre-tax amount
Other comprehensive income (loss), Pre-tax amount					0	3
Tax (expense) benefit
Other comprehensive income (loss), Tax (expense) benefit					0	(1)
After-tax amount
Other comprehensive income (loss), After-tax amount					0	2
Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost
Pre-tax amount
Reclassification adjustment, Pre-tax amount		22	22	24	44	49
Tax (expense) benefit
Reclassification adjustment, Tax (expense) benefit		(6)	(5)	(8)	(11)	(15)
After-tax amount
Reclassification adjustment, After-tax amount		16	17	16	33	34
Unrealized gain (loss) on cash flow hedges
Pre-tax amount
Other comprehensive income (loss), Pre-tax amount		(17)	7	(8)	(10)	6
Reclassification adjustment, Pre-tax amount		(1)	(10)	9	(11)	10
Total other comprehensive income (loss), Pre-tax amount		(18)	(3)	1	(21)	16
Tax (expense) benefit
Other comprehensive income (loss), Tax (expense) benefit		3	(1)	4	2	(1)
Reclassification adjustment, Tax (expense) benefit		1	2	(4)	3	(4)
Total other comprehensive income (loss), Tax (expense) benefit		4	1	0	5	(5)
After-tax amount
Other comprehensive income (loss), After-tax amount		(14)	6	(4)	(8)	5
Reclassification adjustment, After-tax amount		0	(8)	5	(8)	6
Total other comprehensive income (loss), net of tax		(14)	(2)	1	(16)	11
Unrealized gain (loss) on cash flow hedges | Trading revenue
Pre-tax amount
Reclassification adjustment, Pre-tax amount					0	(3)
Tax (expense) benefit
Reclassification adjustment, Tax (expense) benefit					0	1
After-tax amount
Reclassification adjustment, After-tax amount					0	(2)
Unrealized gain (loss) on cash flow hedges | Other revenue
Pre-tax amount
Reclassification adjustment, Pre-tax amount		1	(4)	0	(3)	0
Tax (expense) benefit
Reclassification adjustment, Tax (expense) benefit		0	1	0	1	0
After-tax amount
Reclassification adjustment, After-tax amount		1	(3)	0	(2)	0
Unrealized gain (loss) on cash flow hedges | Salary expense
Pre-tax amount
Reclassification adjustment, Pre-tax amount		(2)	(6)	9	(8)	13
Tax (expense) benefit
Reclassification adjustment, Tax (expense) benefit		1	1	(4)	2	(5)
After-tax amount
Reclassification adjustment, After-tax amount		$ (1)	$ (5)	$ 5	$ (6)	$ 8
[1]	Other comprehensive income (loss) attributable to The Bank of New York Mellon Corporation shareholders was $(452) million for the quarter ended June 30, 2018, $16 million for the quarter ended March 31, 2018, $431 million for the quarter ended June 30, 2017, $(436) million for the six months ended June 30, 2018 and $672 million for the six months ended June 30, 2017.

Fair value measurement - Narrat

Fair value measurement - Narrative (Details) - Estimated fair value - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments recorded at fair value	$ 215,079	$ 238,984
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments recorded at fair value	0	0
Assets measured at fair value on a recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments recorded at fair value	$ 0	$ 0

Fair value measurement - Assets

Fair value measurement - Assets and Liabilities on Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Trading assets:
Total derivative assets not designated as hedging	$ 3,188	$ 3,091
Trading liabilities:
Derivative liabilities	2,561	3,576
Long-term debt	363	367
Estimated fair value
Trading assets:
Other assets, fair value	6,714	6,626
Total assets	215,079	238,984
Trading liabilities:
Long-term debt	27,403	27,789
Estimated fair value | Level 1
Trading assets:
Other assets, fair value	5,361	5,382
Total assets	11,309	16,747
Trading liabilities:
Long-term debt	0	0
Estimated fair value | Level 2
Trading assets:
Other assets, fair value	1,353	1,244
Total assets	203,770	222,237
Trading liabilities:
Long-term debt	27,403	27,789
Estimated fair value | Level 3
Trading assets:
Other assets, fair value	0	0
Total assets	0	0
Trading liabilities:
Long-term debt	0	0
Total carrying value
Trading assets:
Other assets, fair value	6,714	6,626
Total assets	215,933	239,159
Trading liabilities:
Long-term debt	27,897	27,612
Assets measured at fair value on a recurring basis
Trading assets:
Total derivative assets not designated as hedging, Netting	(5,871)	(8,845)
Trading liabilities:
Total derivative liabilities not designated as hedging, Netting	(6,370)	(8,797)
Assets measured at fair value on a recurring basis | Total trading assets
Trading assets:
Total derivative assets not designated as hedging, Netting	(5,871)	(8,845)
Assets measured at fair value on a recurring basis | Operations
Trading assets:
Total derivative assets not designated as hedging, Netting	(5,871)	(8,845)
Trading liabilities:
Total derivative liabilities not designated as hedging, Netting	(6,370)	(8,797)
Assets measured at fair value on a recurring basis | Total trading liabilities
Trading liabilities:
Total derivative liabilities not designated as hedging, Netting	(6,370)	(8,797)
Assets measured at fair value on a recurring basis | Not designated as hedging | Total trading assets
Trading assets:
Total derivative assets not designated as hedging, Netting	(5,871)	(8,845)
Assets measured at fair value on a recurring basis | Not designated as hedging | Total trading assets | Interest rate contracts
Trading assets:
Total derivative assets not designated as hedging, Netting	(2,322)	(5,075)
Assets measured at fair value on a recurring basis | Not designated as hedging | Total trading assets | Foreign exchange contracts
Trading assets:
Total derivative assets not designated as hedging, Netting	(3,495)	(3,720)
Assets measured at fair value on a recurring basis | Not designated as hedging | Total trading assets | Equity and other contracts
Trading assets:
Total derivative assets not designated as hedging, Netting	(54)	(50)
Assets measured at fair value on a recurring basis | Not designated as hedging | Total trading liabilities
Trading liabilities:
Total derivative liabilities not designated as hedging, Netting	(6,370)	(8,797)
Assets measured at fair value on a recurring basis | Not designated as hedging | Total trading liabilities | Interest rate contracts
Trading liabilities:
Total derivative liabilities not designated as hedging, Netting	(2,428)	(5,495)
Assets measured at fair value on a recurring basis | Not designated as hedging | Total trading liabilities | Foreign exchange contracts
Trading liabilities:
Total derivative liabilities not designated as hedging, Netting	(3,862)	(3,221)
Assets measured at fair value on a recurring basis | Not designated as hedging | Total trading liabilities | Equity and other contracts
Trading liabilities:
Total derivative liabilities not designated as hedging, Netting	(80)	(81)
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1
Trading assets:
Debt instruments	1,054
Equity instruments (c)	1,087
Other assets, fair value	122	144
Total assets	$ 30,640	$ 27,964
Percentage of total assets prior to netting	31.00%	29.00%
Trading liabilities:
Long-term debt	$ 0	$ 0
Subtotal liabilities	$ 985	$ 1,133
Percentage of total liabilities prior to netting	9.00%	8.00%
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Debt instruments
Trading liabilities:
Trading liabilities	$ 973
Total trading liabilities	973
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Equity instruments
Trading liabilities:
Trading liabilities	5
Total trading liabilities	5
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	28,208	$ 26,145
Assets measured at fair value on a recurring basis | Estimated fair value | 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	18,855	15,263
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | 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	9,353	9,919
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | Agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | Other RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities		0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | CLOs
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities		0
Assets measured at fair value on a recurring basis | Estimated fair value | 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		963
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Securities available-for-sale | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | 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	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Total trading assets
Trading assets:
Debt and equity instruments		1,344
Trading assets	2,156	1,353
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Total other assets
Trading assets:
Other assets, fair value	122	144
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Operations
Trading assets:
Total assets	$ 30,486	$ 27,642
Percentage of total assets prior to netting	31.00%	29.00%
Trading liabilities:
Subtotal liabilities	$ 985	$ 1,132
Percentage of total liabilities prior to netting	9.00%	8.00%
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Investment management funds
Trading assets:
Total assets	$ 154	$ 322
Trading liabilities:
Subtotal liabilities	0	1
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Total trading liabilities
Trading liabilities:
Trading liabilities	985	1,132
Debt and equity instruments		1,128
Total trading liabilities	985	1,132
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Total other liabilities – derivative liabilities designated as hedging
Trading liabilities:
Total other liabilities – derivative liabilities designated as hedging	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Not designated as hedging | Total trading assets
Trading assets:
Total derivative assets not designated as hedging	15	9
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Not designated as hedging | Total trading assets | Interest rate contracts
Trading assets:
Total derivative assets not designated as hedging	14	9
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Not designated as hedging | Total trading assets | Foreign exchange contracts
Trading assets:
Total derivative assets not designated as hedging	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Not designated as hedging | Total trading assets | Equity and other contracts
Trading assets:
Total derivative assets not designated as hedging	1	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Not designated as hedging | Total trading liabilities
Trading liabilities:
Derivative liabilities	7	4
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Not designated as hedging | Total trading liabilities | Interest rate contracts
Trading liabilities:
Derivative liabilities	7	4
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Not designated as hedging | Total trading liabilities | Foreign exchange contracts
Trading liabilities:
Derivative liabilities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Not designated as hedging | Total trading liabilities | Equity and other contracts
Trading liabilities:
Derivative liabilities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Designated as hedging
Trading assets:
Total derivative assets not designated as hedging	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Designated as hedging | Total other assets
Trading assets:
Total derivative assets not designated as hedging		0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Designated as hedging | Total other assets | Interest rate contracts
Trading assets:
Total derivative assets not designated as hedging	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Designated as hedging | Total other assets | Foreign exchange contracts
Trading assets:
Total derivative assets not designated as hedging	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Designated as hedging | Total other liabilities – derivative liabilities designated as hedging
Trading liabilities:
Total other liabilities – derivative liabilities designated as hedging		0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Designated as hedging | Total other liabilities – derivative liabilities designated as hedging | Interest rate contracts
Trading liabilities:
Derivative liabilities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 1 | Designated as hedging | Total other liabilities – derivative liabilities designated as hedging | Foreign exchange contracts
Trading liabilities:
Derivative liabilities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2
Trading assets:
Debt instruments	2,019
Equity instruments (c)	0
Other assets, fair value	536	493
Total assets	$ 67,292	$ 67,814
Percentage of total assets prior to netting	69.00%	71.00%
Trading liabilities:
Long-term debt	$ 363	$ 367
Subtotal liabilities	$ 9,406	$ 12,817
Percentage of total liabilities prior to netting	91.00%	92.00%
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Debt instruments
Trading liabilities:
Trading liabilities	$ 116
Total trading liabilities	116
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Equity instruments
Trading liabilities:
Trading liabilities	0
Total trading liabilities	0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	55,732	$ 53,398
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Securities available-for-sale | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	0	0
Assets measured at fair value on a recurring basis | Estimated fair value | 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	1,447	908
Assets measured at fair value on a recurring basis | Estimated fair value | 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	2,733	2,638
Assets measured at fair value on a recurring basis | Estimated fair value | 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	2,630	2,957
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Securities available-for-sale | Agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	24,803	23,819
Assets measured at fair value on a recurring basis | Estimated fair value | 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	1,507	1,578
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Securities available-for-sale | Other RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities		149
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Securities available-for-sale | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,378	1,360
Assets measured at fair value on a recurring basis | Estimated fair value | 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	9,566	8,762
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Securities available-for-sale | CLOs
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	3,177	2,909
Assets measured at fair value on a recurring basis | Estimated fair value | 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		1,043
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Securities available-for-sale | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities		0
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Securities available-for-sale | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,146	1,255
Assets measured at fair value on a recurring basis | Estimated fair value | 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	4,452	3,491
Assets measured at fair value on a recurring basis | Estimated fair value | 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	2,893	2,529
Assets measured at fair value on a recurring basis | Estimated fair value | 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	943	1,091
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Total trading assets
Trading assets:
Debt and equity instruments		1,910
Trading assets	10,750	13,514
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Total other assets
Trading assets:
Other assets, fair value	223	170
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Operations
Trading assets:
Total assets	$ 67,018	$ 67,405
Percentage of total assets prior to netting	69.00%	71.00%
Trading liabilities:
Subtotal liabilities	$ 9,403	$ 12,816
Percentage of total liabilities prior to netting	91.00%	92.00%
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Investment management funds
Trading assets:
Total assets	$ 274	$ 409
Trading liabilities:
Subtotal liabilities	3	1
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Total trading liabilities
Trading liabilities:
Trading liabilities	8,965	11,649
Debt and equity instruments		80
Total trading liabilities	8,965	11,649
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Total other liabilities – derivative liabilities designated as hedging
Trading liabilities:
Total other liabilities – derivative liabilities designated as hedging	75
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Not designated as hedging | Total trading assets
Trading assets:
Total derivative assets not designated as hedging	8,731	11,604
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Not designated as hedging | Total trading assets | Interest rate contracts
Trading assets:
Total derivative assets not designated as hedging	3,572	6,430
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Not designated as hedging | Total trading assets | Foreign exchange contracts
Trading assets:
Total derivative assets not designated as hedging	5,082	5,104
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Not designated as hedging | Total trading assets | Equity and other contracts
Trading assets:
Total derivative assets not designated as hedging	77	70
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Not designated as hedging | Total trading liabilities
Trading liabilities:
Derivative liabilities	8,849	11,569
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Not designated as hedging | Total trading liabilities | Interest rate contracts
Trading liabilities:
Derivative liabilities	3,101	6,349
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Not designated as hedging | Total trading liabilities | Foreign exchange contracts
Trading liabilities:
Derivative liabilities	5,612	5,067
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Not designated as hedging | Total trading liabilities | Equity and other contracts
Trading liabilities:
Derivative liabilities	136	153
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Designated as hedging | Total other assets
Trading assets:
Total derivative assets not designated as hedging	313	323
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Designated as hedging | Total other assets | Interest rate contracts
Trading assets:
Total derivative assets not designated as hedging	60	278
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Designated as hedging | Total other assets | Foreign exchange contracts
Trading assets:
Total derivative assets not designated as hedging	253	45
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Designated as hedging | Total other liabilities – derivative liabilities designated as hedging
Trading liabilities:
Total other liabilities – derivative liabilities designated as hedging		800
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Designated as hedging | Total other liabilities – derivative liabilities designated as hedging | Interest rate contracts
Trading liabilities:
Derivative liabilities	62	534
Assets measured at fair value on a recurring basis | Estimated fair value | Level 2 | Designated as hedging | Total other liabilities – derivative liabilities designated as hedging | Foreign exchange contracts
Trading liabilities:
Derivative liabilities	13	266
Assets measured at fair value on a recurring basis | Estimated fair value | Level 3
Trading assets:
Total assets	$ 0	$ 0
Percentage of total assets prior to netting	0.00%	0.00%
Assets measured at fair value on a recurring basis | Estimated fair value | Level 3 | Operations
Trading assets:
Percentage of total assets prior to netting	0.00%	0.00%
Assets measured at fair value on a recurring basis | Total carrying value
Trading assets:
Debt instruments	$ 3,073
Equity instruments (c)	1,087
Other assets, fair value	843	$ 791
Total assets	92,246	87,087
Trading liabilities:
Long-term debt	363	367
Subtotal liabilities	4,021	5,153
Assets measured at fair value on a recurring basis | Total carrying value | Debt instruments
Trading liabilities:
Trading liabilities	1,089
Total trading liabilities	1,089
Assets measured at fair value on a recurring basis | Total carrying value | Equity instruments
Trading liabilities:
Trading liabilities	5
Total trading liabilities	5
Assets measured at fair value on a recurring basis | Total carrying value | Sovereign debt/sovereign guaranteed
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	12,086	12,557
Assets measured at fair value on a recurring basis | Total carrying value | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,507	1,727
Assets measured at fair value on a recurring basis | Total carrying value | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,893	2,529
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	83,940	79,543
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	18,855	15,263
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,447	908
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Sovereign debt/sovereign guaranteed
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	12,086	12,557
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,630	2,957
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	24,803	23,819
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,507	1,578
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Other RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities		149
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,378	1,360
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	9,566	8,762
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | CLOs
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	3,177	2,909
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities		1,043
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities		963
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	1,146	1,255
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	4,452	3,491
Assets measured at fair value on a recurring basis | Total carrying value | Securities available-for-sale | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total available-for-sale securities	2,893	2,529
Assets measured at fair value on a recurring basis | Total carrying value | Total trading assets
Trading assets:
Debt and equity instruments		3,254
Trading assets	7,035	6,022
Assets measured at fair value on a recurring basis | Total carrying value | Total other assets
Trading assets:
Other assets, fair value	345	314
Assets measured at fair value on a recurring basis | Total carrying value | Other assets measured at net asset value
Trading assets:
Other assets, fair value	185	154
Assets measured at fair value on a recurring basis | Total carrying value | Operations
Trading assets:
Total assets	91,818	86,356
Trading liabilities:
Subtotal liabilities	4,018	5,151
Assets measured at fair value on a recurring basis | Total carrying value | Investment management funds
Trading assets:
Total assets	428	731
Trading liabilities:
Subtotal liabilities	3	2
Assets measured at fair value on a recurring basis | Total carrying value | Total trading liabilities
Trading liabilities:
Trading liabilities	3,580	3,984
Debt and equity instruments		1,208
Total trading liabilities	3,580	3,984
Assets measured at fair value on a recurring basis | Total carrying value | Total other liabilities – derivative liabilities designated as hedging
Trading liabilities:
Total other liabilities – derivative liabilities designated as hedging	75
Assets measured at fair value on a recurring basis | Total carrying value | Not designated as hedging | Total trading assets
Trading assets:
Total derivative assets not designated as hedging	2,875	2,768
Assets measured at fair value on a recurring basis | Total carrying value | Not designated as hedging | Total trading assets | Interest rate contracts
Trading assets:
Total derivative assets not designated as hedging	1,264	1,364
Assets measured at fair value on a recurring basis | Total carrying value | Not designated as hedging | Total trading assets | Foreign exchange contracts
Trading assets:
Total derivative assets not designated as hedging	1,587	1,384
Assets measured at fair value on a recurring basis | Total carrying value | Not designated as hedging | Total trading assets | Equity and other contracts
Trading assets:
Total derivative assets not designated as hedging	24	20
Assets measured at fair value on a recurring basis | Total carrying value | Not designated as hedging | Total trading liabilities
Trading liabilities:
Derivative liabilities	2,486	2,776
Assets measured at fair value on a recurring basis | Total carrying value | Not designated as hedging | Total trading liabilities | Interest rate contracts
Trading liabilities:
Derivative liabilities	680	858
Assets measured at fair value on a recurring basis | Total carrying value | Not designated as hedging | Total trading liabilities | Foreign exchange contracts
Trading liabilities:
Derivative liabilities	1,750	1,846
Assets measured at fair value on a recurring basis | Total carrying value | Not designated as hedging | Total trading liabilities | Equity and other contracts
Trading liabilities:
Derivative liabilities	56	72
Assets measured at fair value on a recurring basis | Total carrying value | Designated as hedging | Total other assets
Trading assets:
Total derivative assets not designated as hedging	313	323
Assets measured at fair value on a recurring basis | Total carrying value | Designated as hedging | Total other assets | Interest rate contracts
Trading assets:
Total derivative assets not designated as hedging	60	278
Assets measured at fair value on a recurring basis | Total carrying value | Designated as hedging | Total other assets | Foreign exchange contracts
Trading assets:
Total derivative assets not designated as hedging	253	45
Assets measured at fair value on a recurring basis | Total carrying value | Designated as hedging | Total other liabilities – derivative liabilities designated as hedging
Trading liabilities:
Total other liabilities – derivative liabilities designated as hedging		800
Assets measured at fair value on a recurring basis | Total carrying value | Designated as hedging | Total other liabilities – derivative liabilities designated as hedging | Interest rate contracts
Trading liabilities:
Derivative liabilities	62	534
Assets measured at fair value on a recurring basis | Total carrying value | Designated as hedging | Total other liabilities – derivative liabilities designated as hedging | Foreign exchange contracts
Trading liabilities:
Derivative liabilities	$ 13	$ 266

Fair value measurement - Certai

Fair value measurement - Certain Items on Recurring Basis (Details) - Assets measured at fair value on a recurring basis - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Non-agency RMBS | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	6.00%	6.00%
Non-agency RMBS | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	7.00%	6.00%
Non-agency RMBS | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	8.00%	8.00%
Non-agency RMBS | BB and lower
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	79.00%	80.00%
Non-agency RMBS | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 1,507	$ 1,727
Non-agency RMBS | 2007 | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	15.00%	13.00%
Non-agency RMBS | 2007 | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	2.00%	3.00%
Non-agency RMBS | 2007 | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	4.00%	0.00%
Non-agency RMBS | 2007 | BB and lower
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	79.00%	84.00%
Non-agency RMBS | 2007 | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 355	$ 419
Non-agency RMBS | 2006 | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Non-agency RMBS | 2006 | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	17.00%	17.00%
Non-agency RMBS | 2006 | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	1.00%	0.00%
Non-agency RMBS | 2006 | BB and lower
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	82.00%	83.00%
Non-agency RMBS | 2006 | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 412	$ 467
Non-agency RMBS | 2005 | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	6.00%	6.00%
Non-agency RMBS | 2005 | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	1.00%	2.00%
Non-agency RMBS | 2005 | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	5.00%	6.00%
Non-agency RMBS | 2005 | BB and lower
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	88.00%	86.00%
Non-agency RMBS | 2005 | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 454	$ 509
Non-agency RMBS | 2004 and earlier | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	3.00%	3.00%
Non-agency RMBS | 2004 and earlier | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	5.00%	2.00%
Non-agency RMBS | 2004 and earlier | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	31.00%	31.00%
Non-agency RMBS | 2004 and earlier | BB and lower
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	61.00%	64.00%
Non-agency RMBS | 2004 and earlier | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 286	$ 332
Commercial MBS | AAA/ AA- | Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	96.00%	94.00%
Commercial MBS | A/ A- | Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	4.00%	6.00%
Commercial MBS | Total carrying value | Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 1,378	$ 1,360
Commercial MBS | 2005 | AAA/ AA- | Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Commercial MBS | 2005 | Total carrying value | Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 47	$ 51
Commercial MBS | 2009-2017 | AAA/ AA- | Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	96.00%	94.00%
Commercial MBS | 2009-2017 | A/ A- | Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	4.00%	6.00%
Commercial MBS | 2009-2017 | Total carrying value | Domestic
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 1,331	$ 1,309
Foreign covered bonds | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 2,893	$ 2,529
Foreign covered bonds | Canada | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | Canada | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 1,619	$ 1,659
Foreign covered bonds | United Kingdom | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | United Kingdom | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 450	$ 103
Foreign covered bonds | Australia | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | Australia | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 330	$ 265
Foreign covered bonds | Sweden | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | Sweden | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 193	$ 136
Foreign covered bonds | Other | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Foreign covered bonds | Other | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 301	$ 366
Sovereign debt/sovereign guaranteed | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	71.00%	69.00%
Sovereign debt/sovereign guaranteed | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	7.00%	7.00%
Sovereign debt/sovereign guaranteed | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	21.00%	23.00%
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 | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 12,086	$ 12,557
Sovereign debt/sovereign guaranteed | United Kingdom | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | United Kingdom | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 3,044	$ 3,052
Sovereign debt/sovereign guaranteed | Germany | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | Germany | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Sovereign debt/sovereign guaranteed | Germany | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 1,844	$ 1,586
Sovereign debt/sovereign guaranteed | France | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | France | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 1,809	$ 2,046
Sovereign debt/sovereign guaranteed | Spain | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Sovereign debt/sovereign guaranteed | Spain | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | Spain | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 1,549	$ 1,635
Sovereign debt/sovereign guaranteed | Italy | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Sovereign debt/sovereign guaranteed | Italy | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | Italy | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 986	$ 1,292
Sovereign debt/sovereign guaranteed | Netherlands | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | Netherlands | BBB/ BBB-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Sovereign debt/sovereign guaranteed | Netherlands | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 899	$ 1,027
Sovereign debt/sovereign guaranteed | Ireland | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Sovereign debt/sovereign guaranteed | Ireland | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | Ireland | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 804	$ 843
Sovereign debt/sovereign guaranteed | Belgium | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	100.00%	100.00%
Sovereign debt/sovereign guaranteed | Belgium | A/ A-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	0.00%	0.00%
Sovereign debt/sovereign guaranteed | Belgium | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 317	$ 803
Sovereign debt/sovereign guaranteed | Other | AAA/ AA-
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	86.00%	50.00%
Sovereign debt/sovereign guaranteed | Other | BB and lower
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Ratings	14.00%	50.00%
Sovereign debt/sovereign guaranteed | Other | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 834	$ 273
Sovereign debt/sovereign guaranteed | Brazil | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	116	136
Non-agency RMBS | 2007 | Total carrying value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total carrying value	$ 943	$ 1,091

Fair value measurement - Asse90

Fair value measurement - Assets on Nonrecurring Basis (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Decrease 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	72	79
Other assets, fair value	26	4
Total assets	98	83
Measured at fair value on a nonrecurring basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Other assets, fair value	0	0
Total assets	0	0
Measured at fair value on a nonrecurring basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	67	73
Other assets, fair value	26	4
Total assets	93	77
Measured at fair value on a nonrecurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	5	6
Other assets, fair value	0	0
Total assets	$ 5	$ 6

Fair value measurement - Financ

Fair value measurement - Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Liabilities:
Long-term debt	$ 363	$ 367
Estimated fair value
Assets:
Interest-bearing deposits with the Federal Reserve and other central banks	75,116	91,510
Interest-bearing deposits with banks	16,155	11,982
Federal funds sold and securities purchased under resale agreements	26,494	28,135
Securities held-to-maturity	34,188	40,512
Loans	56,412	60,219
Other financial assets	6,714	6,626
Total assets	215,079	238,984
Liabilities:
Noninterest-bearing deposits	75,463	82,716
Interest-bearing deposits	152,843	160,042
Federal funds purchased and securities sold under repurchase agreements	13,200	15,163
Payables to customers and broker-dealers	19,123	20,184
Commercial paper	2,508	3,075
Borrowings	3,006	2,931
Long-term debt	27,403	27,789
Total liabilities	293,546	311,900
Estimated fair value | Level 1
Assets:
Interest-bearing deposits with the Federal Reserve and other central banks	0	0
Interest-bearing deposits with banks	0	0
Federal funds sold and securities purchased under resale agreements	0	0
Securities held-to-maturity	5,948	11,365
Loans	0	0
Other financial assets	5,361	5,382
Total assets	11,309	16,747
Liabilities:
Noninterest-bearing deposits	0	0
Interest-bearing deposits	0	0
Federal funds purchased and securities sold under repurchase agreements	0	0
Payables to customers and broker-dealers	0	0
Commercial paper	0	0
Borrowings	0	0
Long-term debt	0	0
Total liabilities	0	0
Estimated fair value | Level 2
Assets:
Interest-bearing deposits with the Federal Reserve and other central banks	75,116	91,510
Interest-bearing deposits with banks	16,155	11,982
Federal funds sold and securities purchased under resale agreements	26,494	28,135
Securities held-to-maturity	28,240	29,147
Loans	56,412	60,219
Other financial assets	1,353	1,244
Total assets	203,770	222,237
Liabilities:
Noninterest-bearing deposits	75,463	82,716
Interest-bearing deposits	152,843	160,042
Federal funds purchased and securities sold under repurchase agreements	13,200	15,163
Payables to customers and broker-dealers	19,123	20,184
Commercial paper	2,508	3,075
Borrowings	3,006	2,931
Long-term debt	27,403	27,789
Total liabilities	293,546	311,900
Estimated fair value | Level 3
Assets:
Interest-bearing deposits with the Federal Reserve and other central banks	0	0
Interest-bearing deposits with banks	0	0
Federal funds sold and securities purchased under resale agreements	0	0
Securities held-to-maturity	0	0
Loans	0	0
Other financial assets	0	0
Total assets	0	0
Liabilities:
Noninterest-bearing deposits	0	0
Interest-bearing deposits	0	0
Federal funds purchased and securities sold under repurchase agreements	0	0
Payables to customers and broker-dealers	0	0
Commercial paper	0	0
Borrowings	0	0
Long-term debt	0	0
Total liabilities	0	0
Carrying amount
Assets:
Interest-bearing deposits with the Federal Reserve and other central banks	75,116	91,510
Interest-bearing deposits with banks	16,134	11,979
Federal funds sold and securities purchased under resale agreements	26,494	28,135
Securities held-to-maturity	35,141	40,827
Loans	56,334	60,082
Other financial assets	6,714	6,626
Total assets	215,933	239,159
Liabilities:
Noninterest-bearing deposits	75,463	82,716
Interest-bearing deposits	155,097	161,606
Federal funds purchased and securities sold under repurchase agreements	13,200	15,163
Payables to customers and broker-dealers	19,123	20,184
Commercial paper	2,508	3,075
Borrowings	3,006	2,931
Long-term debt	27,897	27,612
Total liabilities	$ 296,294	$ 313,287

Fair value measurement - Deriva

Fair value measurement - Derivatives (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Securities available-for-sale
Derivative [Line Items]
Carrying amount	$ 16,308	$ 12,307
Notional amount of hedge	16,756	12,365
Unrealized Gain	60	102
Unrealized (Loss)	(62)	(301)
Long-term debt
Derivative [Line Items]
Carrying amount	23,460	23,821
Notional amount of hedge	24,100	23,950
Unrealized Gain	0	175
Unrealized (Loss)	$ 0	$ (233)

Fair value option - Assets and

Fair value option - Assets and Liabilities (Details) - Investment Management funds - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Assets of consolidated investment management funds:
Trading assets	$ 175	$ 516
Other assets, fair value	253	215
Total assets	428	731
Liabilities of consolidated investment management funds:
Other liabilities	3	2
Subtotal liabilities	$ 3	$ 2

Fair value option - Changes in

Fair value option - Changes in Fair Value of Loans (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Long-term debt | Foreign exchange and other trading revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) change in fair value	$ 0	$ 4	$ (4)	$ 4	$ (5)

Fair value option - Narrative (

Fair value option - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair value option of long-term debt	$ 240
Long-term debt, fair value	$ 363	$ 367

Derivative instruments - Narrat

Derivative instruments - Narrative (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Counterparty default losses recorded	$ 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				$ 178,000,000
Value-at-risk methodology assumed holding period for instruments				1 day
Value-at-risk methodology confidence level percentage				99.00%
Additional collateral The Bank of New York Mellon would have to post for existing collateral arrangements, if The Bank of New York Mellon had fallen below investment grade	115,000,000			$ 115,000,000		$ 102,000,000
Foreign exchange contracts | Net investment hedging
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Hedged financial instruments, notional amount of derivative	7,500,000,000			7,500,000,000
Gain or (loss) recognized in accumulated OCI on derivatives	(429,000,000)	$ 158,000,000	$ 274,000,000	$ (271,000,000)	$ 370,000,000
Foreign exchange contracts | Maximum | Net investment hedging
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Hedging derivatives, maturities, maximum				1 year
Foreign exchange contracts | Forecasted Foreign Currency
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Amount of gain/(loss) to be reclassified in next 12 months from AOCI to earnings				$ 9,000,000
Foreign exchange contracts | Forecasted Foreign Currency | Cash flow hedges
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Original maturities, maximum, of hedged instruments				12 months
Hedged financial instruments, notional amount of derivative	269,000,000			$ 269,000,000
Gain or (loss) recognized in accumulated OCI on derivatives				9,000,000
Securities available-for-sale
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Hedged financial instruments	16,600,000,000			16,600,000,000
Hedged financial instruments, notional amount of derivative	16,756,000,000			$ 16,756,000,000		12,365,000,000
Securities available-for-sale | Interest rate swap
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Original maturities, maximum, of hedged instruments				30 years
Hedged financial instruments, notional amount of derivative	16,600,000,000			$ 16,600,000,000
Long-term debt
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Hedged financial instruments	24,100,000,000			24,100,000,000
Hedged financial instruments, notional amount of derivative	24,100,000,000			$ 24,100,000,000		$ 23,950,000,000
Long-term debt | Interest rate swap
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Original maturities, maximum, of hedged instruments				30 years
Hedged financial instruments, notional amount of derivative	$ 24,100,000,000			$ 24,100,000,000
Original maturities, minimum, of hedged instruments				5 years

Derivative instruments - Gains

Derivative instruments - Gains (Losses) Related to Hedging Derivative Portfolio Recognized in the Income Statement (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in income on derivatives	$ 2	$ 23	$ (16)	$ 25	$ (21)
Fair value hedging | Derivative | Long-term debt | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized on derivatives	(131)	(378)	105	(509)	33
Fair value hedging | Derivative | Available-for-sale | Interest income
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized on derivatives	136	397	(103)	533	(21)
Fair value hedging | Hedged item | Long-term debt | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized on hedged item	129	377	(98)	506	(31)
Fair value hedging | Hedged item | Available-for-sale | Interest income
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized on hedged item	(133)	(383)	89	(516)	8
Cash flow hedges | Trading revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified from accumulated OCI into income	0	0	0	0	3
Cash flow hedges | Other revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified from accumulated OCI into income	(1)	4	0	3	0
Cash flow hedges | Salary expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified from accumulated OCI into income	$ 2	$ 6	$ (9)	$ 8	$ (13)

Derivative instruments - Impact

Derivative instruments - Impact of Hedging Derivatives Used in Net Investment Hedging Relationships (Details) - Net investment hedging - FX contracts - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) recognized in accumulated OCI on derivatives	$ 429	$ (158)	$ (274)	$ 271	$ (370)
Net interest revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (loss) reclassified from accumulated OCI into income	$ 0	$ 0	$ 0	$ 0	$ 0

Derivative instruments - Hedged

Derivative instruments - Hedged Items in Fair Value Hedging Relationships (Details) - Fair value hedging $ in Millions	Jun. 30, 2018USD ($)
Long-term debt
Derivative [Line Items]
Carrying amount of hedged liability	$ 23,460
Hedge accounting basis adjustment (decrease)	(640)
Long-term debt | Terminated hedges
Derivative [Line Items]
Hedge accounting basis adjustment (decrease)	14
Securities available-for-sale
Derivative [Line Items]
Carrying amount of hedged asset	16,308
Hedge accounting basis adjustment (decrease)	$ (375)

Derivative instruments - Imp100

Derivative instruments - Impact of Derivative Instruments on the Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	$ 9,059	$ 11,936
Asset derivatives fair value, effect of master netting agreements	(5,871)	(8,845)
Total derivatives, Net assets recognized on the balance sheet	3,188	3,091
Liability derivatives fair value	8,931	12,373
Liability derivatives fair value, effect of master netting agreements	(6,370)	(8,797)
Total derivatives, Net liabilities recognized on the balance sheet	2,561	3,576
Master netting agreements, cash collateral received	740	925
Master netting agreements, cash collateral paid	1,239	877
Interest rate contracts
Derivatives, Fair Value [Line Items]
Asset derivatives fair value, effect of master netting agreements	(2,322)	(5,075)
Liability derivatives fair value, effect of master netting agreements	(2,428)	(5,495)
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Asset derivatives fair value, effect of master netting agreements	(3,495)	(3,720)
Liability derivatives fair value, effect of master netting agreements	(3,862)	(3,221)
Equity contracts
Derivatives, Fair Value [Line Items]
Asset derivatives fair value, effect of master netting agreements	(54)	(50)
Liability derivatives fair value, effect of master netting agreements	(80)	(81)
Designated as hedging
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	313	323
Liability derivatives fair value	75	800
Designated as hedging | Interest rate contracts
Derivatives, Fair Value [Line Items]
Notional value	40,856	36,315
Asset derivatives fair value	60	278
Liability derivatives fair value	62	534
Designated as hedging | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Notional value	7,811	8,923
Asset derivatives fair value	253	45
Liability derivatives fair value	13	266
Not designated as hedging
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	8,746	11,613
Liability derivatives fair value	8,856	11,573
Not designated as hedging | Interest rate contracts
Derivatives, Fair Value [Line Items]
Notional value	257,199	267,485
Asset derivatives fair value	3,586	6,439
Liability derivatives fair value	3,108	6,353
Not designated as hedging | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Notional value	728,861	767,999
Asset derivatives fair value	5,082	5,104
Liability derivatives fair value	5,612	5,067
Not designated as hedging | Equity contracts
Derivatives, Fair Value [Line Items]
Notional value	1,142	1,698
Asset derivatives fair value	78	70
Liability derivatives fair value	133	149
Not designated as hedging | Credit contracts
Derivatives, Fair Value [Line Items]
Notional value	180	180
Asset derivatives fair value	0	0
Liability derivatives fair value	$ 3	$ 4

Derivative instruments - Revenu

Derivative instruments - Revenue from Foreign Exchange and Other Trading (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Foreign exchange	$ 171	$ 183	$ 151	$ 354	$ 305
Other trading revenue (loss)	16	26	14	42	24
Total foreign exchange and other trading revenue	$ 187	$ 209	$ 165	$ 396	$ 329

Derivative instruments - Contra

Derivative instruments - Contracts Falling under Early Termination Provisions (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Credit Derivatives [Line Items]
Aggregate fair value of OTC derivatives in net liability positions	$ 2,861	$ 2,393
Collateral posted	3,183	2,115
A3 | A-
Credit Derivatives [Line Items]
Aggregate fair value of OTC derivatives in net liability positions	35	92
Baa2 | BBB
Credit Derivatives [Line Items]
Aggregate fair value of OTC derivatives in net liability positions	282	748
Ba1 | BB plus
Credit Derivatives [Line Items]
Aggregate fair value of OTC derivatives in net liability positions	$ 1,327	$ 2,007

Derivative instruments - Offset

Derivative instruments - Offsetting (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Derivative Asset [Abstract]
Derivatives subject to netting arrangements, Gross assets recognized	$ 7,478	$ 10,648
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	5,871	8,845
Derivatives subject to netting arrangements, Net assets recognized on the balance sheet	1,607	1,803
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	209	294
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Derivative assets subject to netting arrangements, Net amount	1,398	1,509
Total derivatives not subject to netting arrangements	1,581	1,288
Total derivatives, Gross assets recognized	9,059	11,936
Total derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	5,871	8,845
Total derivatives, Net assets recognized on the balance sheet	3,188	3,091
Total derivatives, Net amount	2,979	2,797
Reverse repurchase agreements, Gross assets recognized	51,949	42,784
Reverse repurchase agreements, Gross amounts offset in the balance sheet	36,766	25,848
Reverse repurchase agreements, Net assets recognized on the balance sheet	15,183	16,936
Reverse repurchase agreements, Gross amounts not offset in the balance sheet, Financial instruments	15,142	16,923
Reverse repurchase agreements, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Reverse repurchase agreements, Net amount	41	13
Securities borrowing, Gross assets recognized	11,303	11,199
Securities borrowing, Net assets recognized on the balance sheet	11,303	11,199
Securities borrowing, Gross amounts not offset in the balance sheet, Financial instruments	10,974	10,858
Securities borrowing, Net amount	329	341
Total, Gross assets recognized	72,311	65,919
Total, Gross amounts offset in the balance sheet	42,637	34,693
Total, Net assets recognized on the balance sheet	29,674	31,226
Total, Gross amounts not offset in the balance sheet, Financial instruments	26,325	28,075
Total, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Total, Net amount	3,349	3,151
Derivative Liability [Abstract]
Derivatives subject to netting arrangements, Gross liabilities recognized	8,265	11,718
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	6,370	8,797
Derivatives subject to netting arrangements, Net liabilities recognized on the balance sheet	1,895	2,921
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	1,005	1,457
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Derivative liabilities subject to netting arrangements, Net amount	890	1,464
Total derivatives not subject to netting arrangements	666	655
Total derivatives, Gross liabilities recognized	8,931	12,373
Total derivatives, Net liabilities recognized on the balance sheet	2,561	3,576
Total derivatives, Net amount	1,556	2,119
Repurchase agreements, Gross liabilities recognized	45,316	33,908
Repurchase agreements, Gross amounts offset in the balance sheet	36,766	25,848
Repurchase agreements, Net liabilities recognized on the balance sheet	8,550	8,060
Repurchase agreements, Gross amounts not offset in the balance sheet, Financial instruments	8,550	8,059
Repurchase agreements, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Repurchase agreements, Net amount	0	1
Securities lending, Gross liabilities recognized	1,706	2,186
Securities lending, Net liabilities recognized on the balance sheet	1,706	2,186
Securities lending, Gross amounts not offset in the balance sheet, Financial instruments	1,627	2,091
Securities lending, Net amount	79	95
Total, Gross liabilities recognized	55,953	48,467
Total, Gross amounts offset in the balance sheet	43,136	34,645
Total, Net liabilities recognized on the balance sheet	12,817	13,822
Total, Gross amounts not offset in the balance sheet, Financial instruments	11,182	11,607
Total, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Total, Net amount	1,635	2,215
Interest rate contracts
Derivative Asset [Abstract]
Derivatives subject to netting arrangements, Gross assets recognized	2,783	5,915
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	2,322	5,075
Derivatives subject to netting arrangements, Net assets recognized on the balance sheet	461	840
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	157	178
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Derivative assets subject to netting arrangements, Net amount	304	662
Total derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	2,322	5,075
Derivative Liability [Abstract]
Derivatives subject to netting arrangements, Gross liabilities recognized	3,114	6,810
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	2,428	5,495
Derivatives subject to netting arrangements, Net liabilities recognized on the balance sheet	686	1,315
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	610	1,222
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Derivative liabilities subject to netting arrangements, Net amount	76	93
Foreign exchange contracts
Derivative Asset [Abstract]
Derivatives subject to netting arrangements, Gross assets recognized	4,621	4,666
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	3,495	3,720
Derivatives subject to netting arrangements, Net assets recognized on the balance sheet	1,126	946
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	52	116
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral received	0	0
Derivative assets subject to netting arrangements, Net amount	1,074	830
Total derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	3,495	3,720
Derivative Liability [Abstract]
Derivatives subject to netting arrangements, Gross liabilities recognized	5,026	4,765
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	3,862	3,221
Derivatives subject to netting arrangements, Net liabilities recognized on the balance sheet	1,164	1,544
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	351	177
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Derivative liabilities subject to netting arrangements, Net amount	813	1,367
Equity and other contracts
Derivative Asset [Abstract]
Derivatives subject to netting arrangements, Gross assets recognized	74	67
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	54	50
Derivatives subject to netting arrangements, Net assets recognized on the balance sheet	20	17
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, Net amount	20	17
Total derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	54	50
Derivative Liability [Abstract]
Derivatives subject to netting arrangements, Gross liabilities recognized	125	143
Derivatives subject to netting arrangements, Gross amounts offset in the balance sheet	80	81
Derivatives subject to netting arrangements, Net liabilities recognized on the balance sheet	45	62
Total derivatives, Gross amounts not offset in the balance sheet, Financial instruments	44	58
Total derivatives, Gross amounts not offset in the balance sheet, Cash collateral pledged	0	0
Derivative liabilities subject to netting arrangements, Net amount	$ 1	$ 4

Derivative instruments - Secure

Derivative instruments - Secured Borrowings (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 45,316	$ 33,908
Securities lending	1,706	2,186
Total borrowings	47,022	36,094
Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	42,216	31,308
Securities lending	1,706	2,186
Total borrowings	43,922	33,494
Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	300	300
Securities lending	0	0
Total borrowings	300	300
30 days or more
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	2,800	2,300
Securities lending	0	0
Total borrowings	2,800	2,300
U.S. Treasury
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	37,762	26,894
U.S. Treasury | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	37,761	26,883
U.S. Treasury | Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	1	11
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	606	750
Securities lending	39	72
U.S. government agencies | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	493	570
Securities lending	39	72
U.S. government agencies | Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	113	180
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	2,707	2,683
Agency RMBS | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	2,503	2,574
Agency RMBS | Up to 30 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	186	109
Agency RMBS | 30 days or more
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	18	0
Corporate bonds
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	2,084	1,425
Corporate bonds | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	716	373
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	1,368	1,052
Other debt securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	1,228	984
Securities lending	434	316
Other debt securities | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	315	253
Securities lending	434	316
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	913	731
Securities lending	0	0
Equity securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	929	1,172
Securities lending	1,233	1,798
Equity securities | Overnight and continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	428	655
Securities lending	1,233	1,798
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	501	517
Securities lending	$ 0	$ 0

Commitments and contingent l105

Commitments and contingent liabilities - Summary of Off-Balance Sheet Credit Risks, Net of Participations (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Securities lending indemnifications, joint venture	$ 68,000	$ 69,000
Invested in reverse repurchase agreements
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Cash collateral invested in indemnified repurchase agreements	40,000	33,000
Lending commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet credit risks	49,633	51,467
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet credit risks	3,055	3,531
Off-balance sheet credit risks participations	581	672
Commercial letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet credit risks	114	122
Securities lending indemnifications
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet credit risks	$ 465,013	$ 432,084

Commitments and contingent l106

Commitments and contingent liabilities - Standby Letters of Credits by Investment Grade (Details) - Standby letters of credit	Jun. 30, 2018	Dec. 31, 2017
Investment grade
Concentration Risk [Line Items]
Standby letters of credit by investment grade	87.00%	84.00%
Non-investment grade
Concentration Risk [Line Items]
Standby letters of credit by investment grade	13.00%	16.00%

Commitments and contingent l107

Commitments and contingent liabilities - Significant Industry Concentrations Related to Credit Exposure (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	$ 57,776	$ 61,540
Financial institutions
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	11,830	13,051
Unfunded commitments	31,600
Total exposure	43,400
Financial institutions | Securities Industry
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	3,400
Unfunded commitments	18,800
Total exposure	22,200
Financial institutions | Asset managers
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	1,400
Unfunded commitments	6,300
Total exposure	7,700
Financial institutions | Banks
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	6,000
Unfunded commitments	1,200
Total exposure	7,200
Financial institutions | Insurance
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	100
Unfunded commitments	3,300
Total exposure	3,400
Financial institutions | Government
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	100
Unfunded commitments	700
Total exposure	800
Financial institutions | Other
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	800
Unfunded commitments	1,300
Total exposure	2,100
Commercial
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	2,453	$ 2,911
Unfunded commitments	16,600
Total exposure	19,100
Commercial | Manufacturing
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	1,200
Unfunded commitments	5,400
Total exposure	6,600
Commercial | Services and other
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	700
Unfunded commitments	5,500
Total exposure	6,200
Commercial | Energy and utilities
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	400
Unfunded commitments	4,600
Total exposure	5,000
Commercial | Media and telecom
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loans	200
Unfunded commitments	1,100
Total exposure	$ 1,300

Commitments and contingent l108

Commitments and contingent liabilities - Narrative (Details)	Jul. 12, 2018claim	Jun. 30, 2018USD ($)claim	Dec. 31, 2017USD ($)	Feb. 29, 2016claim	Dec. 17, 2015claim	Jun. 18, 2014trust
Commitments and Contingencies Disclosure [Line Items]
Lending commitment maturing in less than one year		$ 28,900,000,000
Lending commitment maturing in one to five years		20,600,000,000
Lending commitment maturing over five years		123,000,000
Allowance for lending-related commitments		$ 109,000,000	$ 102,000,000
Collateralization percentage generally required for a securities lending transaction with indemnification against broker default		102.00%
Securities lending indemnifications, secured amount of collateral		$ 487,000,000,000	451,000,000,000
Securities lending indemnifications, joint venture		68,000,000,000	69,000,000,000
Securities lending indemnifications, collateral joint venture		$ 72,000,000,000	73,000,000,000
Loss contingency, number of MBS trusts | trust						249
Matters Related to R. Allen Stanford
Commitments and Contingencies Disclosure [Line Items]
Number of lawsuits or class actions (in claims) | claim		15
Matters Related to R. Allen Stanford, Putative Class Action
Commitments and Contingencies Disclosure [Line Items]
Number of lawsuits or class actions (in claims) | claim		2
Brazilian Postalis Litigation
Commitments and Contingencies Disclosure [Line Items]
Number of lawsuits or class actions (in claims) | claim					3
Depositary Receipt Litigation
Commitments and Contingencies Disclosure [Line Items]
Number of lawsuits or class actions (in claims) | claim				4
Federal Court, Southern District of New York, Breach of Contract and Violation of ERISA
Commitments and Contingencies Disclosure [Line Items]
Number of lawsuits or class actions (in claims) | claim		2
Maximum
Commitments and Contingencies Disclosure [Line Items]
Loss contingency, aggregate range of reasonable loss (up to)		$ 940,000,000
Standby letters of credit
Commitments and Contingencies Disclosure [Line Items]
Standby letters of credit (SBLC) collateralized with cash and securities		138,000,000	160,000,000
SBLC expiring within one year		2,200,000,000
SBLC expiring within one to five years		889,000,000
Commercial letters of credit		3,055,000,000	3,531,000,000
Commercial letters of credit
Commitments and Contingencies Disclosure [Line Items]
Commercial letters of credit		$ 114,000,000	$ 122,000,000
Subsequent Event | Matters Related to R. Allen Stanford
Commitments and Contingencies Disclosure [Line Items]
Number of claims dismissed (in claims) | claim	6

Lines of business - Narrative (

Lines of business - Narrative (Details)	6 Months Ended
	Jun. 30, 2018business
Segment Reporting [Abstract]
Number of principal businesses	2

Lines of business - Contributio

Lines of business - Contribution of Segments to Overall Profitability (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Fee and other revenue	$ 3,210	$ 3,270	$ 3,120	$ 6,480	$ 6,138
Net interest revenue (expense)	916	919	826	1,835	1,618
Provision for credit losses	(3)	(5)	(7)	(8)	(12)
Income from consolidated investment management funds, net of noncontrolling interests	1,103	1,171	975	2,274	1,897
Investment income (loss), net	12	(11)	10	1	43
Net income (loss) attributable to noncontrolling interests	5	(9)	1	(4)	16
Investment Management
Segment Reporting Information [Line Items]
Net income (loss) attributable to noncontrolling interests	7	(11)	3	(4)		$ 21
Operating segments
Segment Reporting Information [Line Items]
Fee and other revenue	3,215	3,270	3,127	6,485	6,160
Net interest revenue (expense)	916	919	826	1,835	1,618
Total revenue	4,131	4,189	3,953	8,320	7,778
Provision for credit losses	(3)	(5)	(7)	(8)	(12)
Noninterest expense	2,745	2,741	2,653	5,486	5,292
Income (loss) before taxes	$ 1,389	$ 1,453	$ 1,307	$ 2,842	$ 2,498
Pre-tax operating margin	34.00%	35.00%	33.00%	34.00%	32.00%
Average assets	$ 346,328	$ 358,175	$ 342,515	$ 352,219	$ 339,375
Net income (loss) attributable to noncontrolling interests	(2)	2	(2)		(5)
Operating segments | Investment Services
Segment Reporting Information [Line Items]
Fee and other revenue	2,233	2,250	2,115	4,483	4,199
Net interest revenue (expense)	874	844	761	1,718	1,468
Total revenue	3,107	3,094	2,876	6,201	5,667
Provision for credit losses	1	(7)	(3)	(6)	(3)
Noninterest expense	1,967	1,949	1,927	3,916	3,776
Income (loss) before taxes	$ 1,139	$ 1,152	$ 952	$ 2,291	$ 1,894
Pre-tax operating margin	37.00%	37.00%	33.00%	37.00%	33.00%
Average assets	$ 264,387	$ 278,095	$ 254,724	$ 271,203	$ 253,031
Operating segments | Investment Management
Segment Reporting Information [Line Items]
Fee and other revenue	941	1,012	899	1,953	1,776
Net interest revenue (expense)	77	76	87	153	173
Total revenue	1,018	1,088	986	2,106	1,949
Provision for credit losses	2	2	0	4	3
Noninterest expense	697	705	698	1,402	1,381
Income (loss) before taxes	$ 319	$ 381	$ 288	$ 700	$ 565
Pre-tax operating margin	31.00%	35.00%	29.00%	33.00%	29.00%
Average assets	$ 31,504	$ 31,963	$ 31,355	$ 31,732	$ 31,212
Income from consolidated investment management funds, net of noncontrolling interests	5	1	7	5	22
Investment income (loss), net	12	(11)	10	1	43
Net income (loss) attributable to noncontrolling interests	7	(11)	3	(4)	21
Operating segments | Other
Segment Reporting Information [Line Items]
Fee and other revenue	41	8	113	49	185
Net interest revenue (expense)	(35)	(1)	(22)	(36)	(23)
Total revenue	6	7	91	13	162
Provision for credit losses	(6)	0	(4)	(6)	(12)
Noninterest expense	81	87	28	168	135
Income (loss) before taxes	(69)	(80)	67	(149)	39
Average assets	$ 50,437	$ 48,117	$ 56,436	$ 49,284	$ 55,132

Supplemental information to 111

Supplemental information to the Consolidated Statement of Cash Flows (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Supplemental Cash Flow Information [Abstract]
Transfers from loans to other assets for other real estate owned	$ 2	$ 2
Change in assets of consolidated VIEs	303	529
Change in liabilities of consolidated VIEs	1	293
Change in nonredeemable noncontrolling interests of consolidated investment management funds	264	275
Securities purchased not settled	400	853
Securities sold not settled	0	1
Securities matured not settled	25
Available-for-sale securities transferred to trading assets	963	0
Held-to-maturity securities transferred to available-for-sale	1,087	0
Premises and equipment/capitalized software funded by capital lease obligations	$ 15	$ 345