BlackRock (BLK) 10-Q 7 Aug 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Trading Symbol	BLK
Entity Registrant Name	BlackRock Inc.
Entity Central Index Key	1,364,742
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		163,636,449

Condensed Consolidated Statemen

Condensed Consolidated Statements of Financial Condition - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 4,907	$ 5,723
Accounts receivable	2,347	2,120
Investments	1,436	1,921
Separate account assets	162,911	161,287
Separate account collateral held under securities lending agreements	32,437	33,654
Property and equipment (net of accumulated depreciation of $635 and $587 at June 30, 2015 and December 31, 2014, respectively)	545	467
Intangible assets (net of accumulated amortization of $1,110 and $1,040 at June 30, 2015 and December 31, 2014, respectively)	17,394	17,344
Goodwill	12,970	12,961
Other assets	1,056	685
Total assets	237,008	239,792
Liabilities
Accrued compensation and benefits	1,137	1,865
Borrowings	5,219
Accounts payable and accrued liabilities	1,284	1,035
Borrowings	4,947	4,922
Separate account liabilities	162,911	161,287
Separate account collateral liabilities under securities lending agreements	32,437	33,654
Deferred income tax liabilities	4,999	4,989
Other liabilities	971	886
Total liabilities	$ 208,878	$ 212,272
Commitments and contingencies (Note 11)
Temporary equity
Redeemable noncontrolling interests	$ 258	$ 35
Permanent Equity
Common stock, $0.01 par value; Shares authorized: 500,000,000 at June 30, 2015 and December 31, 2014; Shares issued: 171,252,185 at June 30, 2015 and December 31, 2014; Shares outstanding: 164,244,192 and 164,786,788 at June 30, 2015 and December 31, 2014, respectively	2	2
Preferred stock (Note 15)	0	0
Additional paid-in capital	19,252	19,386
Retained earnings	11,052	10,164
Accumulated other comprehensive loss	(339)	(273)
Treasury stock, common, at cost (7,007,993 and 6,465,397 shares held at June 30, 2015 and December 31, 2014, respectively)	(2,191)	(1,894)
Total BlackRock, Inc. stockholders' equity	27,776	27,366
Nonredeemable noncontrolling interests	96	119
Total permanent equity	27,872	27,485
Total liabilities, temporary equity and permanent equity	237,008	239,792
Consolidated Variable Interest Entities [Member]
Assets
Cash and cash equivalents	64	278
Investments	901	3,320
Other assets	40	32
Liabilities
Borrowings	0	3,389
Other liabilities	192	245
Temporary equity
Redeemable noncontrolling interests	162
Permanent Equity
Appropriated retained earnings	0	(19)
Nonredeemable noncontrolling interests	$ 95	$ 15

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Property and equipment, accumulated depreciation	$ 635	$ 587
Intangible assets, accumulated amortization	1,110	1,040
Redeemable noncontrolling interests	$ 258	$ 35
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	171,252,185	171,252,185
Common stock, shares outstanding	164,244,192	164,786,788
Treasury stock, common shares	7,007,993	6,465,397
Nonredeemable noncontrolling interests of consolidated variable interest entities	$ 96	$ 119
Consolidated Variable Interest Entities [Member]
Redeemable noncontrolling interests	162
Nonredeemable noncontrolling interests of consolidated variable interest entities	$ 95	$ 15

Condensed Consolidated Stateme4

Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue
Total investment advisory, administration fees and securities lending revenue	$ 2,534	$ 2,434	$ 4,924	$ 4,725
Investment advisory performance fees	136	115	244	273
BlackRock Solutions and advisory	161	146	308	300
Distribution fees	13	18	30	37
Other revenue	61	65	122	113
Total revenue	2,905	2,778	5,628	5,448
Expense
Employee compensation and benefits	1,012	948	1,993	1,930
Distribution and servicing costs	105	89	204	178
Amortization of deferred sales commissions	12	14	25	29
Direct fund expense	191	187	380	366
General and administration	312	377	651	690
Amortization of intangible assets	35	41	70	82
Total expense	1,667	1,656	3,323	3,275
Operating income	1,238	1,122	2,305	2,173
Nonoperating income (expense)
Net gain (loss) on investments	(6)	45	53	121
Interest and dividend income	5	3	9	13
Interest expense	(52)	(60)	(103)	(113)
Total nonoperating income (expense)	(41)	16	(25)	33
Income before income taxes	1,197	1,138	2,280	2,206
Income tax expense	371	297	629	621
Net income	826	841	1,651	1,585
Less:
Net income (loss) attributable to redeemable noncontrolling interests	3	1	7	2
Net income (loss) attributable to nonredeemable noncontrolling interests	4	32	3	19
Net income attributable to BlackRock, Inc.	$ 819	$ 808	$ 1,641	$ 1,564
Earnings per share attributable to BlackRock, Inc. common stockholders:
Basic	$ 4.92	$ 4.79	$ 9.84	$ 9.26
Diluted	4.84	4.72	9.69	9.12
Cash dividends declared and paid per share	$ 2.18	$ 1.93	$ 4.36	$ 3.86
Weighted-average common shares outstanding:
Basic	166,616,558	168,712,221	166,851,492	168,895,801
Diluted	169,114,759	171,150,153	169,418,964	171,540,018
Consolidated Variable Interest Entities [Member]
Nonoperating income (expense)
Net gain (loss) on consolidated variable interest entities	$ 12	$ 28	$ 16	$ 12
Related Parties [Member]
Revenue
Total investment advisory, administration fees and securities lending revenue	1,766	1,689	3,447	3,300
Other Third Parties [Member]
Revenue
Total investment advisory, administration fees and securities lending revenue	$ 768	$ 745	$ 1,477	$ 1,425

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income		$ 826	$ 841	$ 1,651	$ 1,585
Other comprehensive income:
Unrealized holding gains (losses), net of tax		(1)	4	(1)	4
Less: reclassification adjustment included in net income	[1]	0	(2)	0	6
Net change from available-for-sale investments, net of tax		(1)	6	(1)	(2)
Benefit plans, net		0	0	(1)	0
Foreign currency translation adjustments	[2]	101	30	(64)	38
Other comprehensive income (loss)		100	36	(66)	36
Comprehensive income		926	877	1,585	1,621
Less: Comprehensive income (loss) attributable to noncontrolling interests		7	33	10	21
Comprehensive income attributable to BlackRock, Inc.		$ 919	$ 844	$ 1,575	$ 1,600
[1]	The tax benefit (expense) was not material for the three and six months ended June 30, 2015 and 2014.
[2]	Amounts in the three and six months ended June 30, 2015 include gains from a net investment hedge of $7 million, net of tax of $4 million.

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - Jun. 30, 2015 - USD ($) $ in Millions	Total	Total
Statement of Comprehensive Income [Abstract]
Gains from net investment hedging	$ 7	$ 7
Gains from net investment hedging, net of tax	$ 4	$ 4

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Additional Paid-in Capital [Member]		Retained Earnings [Member]	Appropriated Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock Common [Member]	Total BlackRock Stockholders' Equity [Member]	Nonredeemable Noncontrolling Interests [Member]	Redeemable Noncontrolling Interests / Temporary Equity [Member]		Nonredeemable Noncontrolling Interests of Consolidated VIEs [Member]
Balance at Dec. 31, 2013	$ 26,616	$ 19,475	[1]	$ 8,208	$ 22	$ (35)	$ (1,210)	$ 26,460	$ 135	$ 54		$ 21
Net income	1,583	0	[1]	1,564	0	0	0	1,564	7	2		12
Allocation of gains (losses) of consolidated collateralized loan obligations	0	0	[1]	0	11	0	0	11	0	0		(11)
Dividends paid	(692)	0	[1]	(692)	0	0	0	(692)	0	0		0
Stock-based compensation	236	236	[1]	0	0	0	0	236	0	0		0
Issuance of common shares related to employee stock transactions	5	(621)	[1]	0	0	0	626	5	0	0		0
Employee tax withholdings related to employee stock transactions	(332)	0	[1]	0	0	0	(332)	(332)	0	0		0
Shares repurchased	(500)	0	[1]	0	0	0	(500)	(500)	0	0		0
Net tax benefit (shortfall) from stock-based compensation	93	93	[1]	0	0	0	0	93	0	0		0
Subscriptions (redemptions/ distributions) - noncontrolling interest holders	(26)	0	[1]	0	0	0	0	0	(22)	184		(4)
Net consolidations (deconsolidations) of sponsored investment funds	0	0	[1]	0	0	0	0	0	0	(193)		0
Other comprehensive income (loss)	36	0	[1]	0	0	36	0	36	0	0		0
Balance at Jun. 30, 2014	27,019	19,183	[1]	9,080	33	1	(1,416)	26,881	120	47		$ 18
Balance at Dec. 31, 2014	27,485	19,388	[2]	10,164	(19)	(273)	(1,894)	27,366	119	35	[3]
Net income	1,644	0	[2]	1,641	0	0	0	1,641	3	7	[3]
Net consolidation (deconsolidation) of VIEs due to adoption of new accounting pronouncement	11	0	[2]	0	19	0	0	19	(8)	194	[3]
Dividends paid	(753)	0	[2]	(753)	0	0	0	(753)	0	0	[3]
Stock-based compensation	269	269	[2]	0	0	0	0	269	0	0	[3]
Issuance of common shares related to employee stock transactions	10	(470)	[2]	0	0	0	480	10	0	0	[3]
Employee tax withholdings related to employee stock transactions	(227)	0	[2]	0	0	0	(227)	(227)	0	0	[3]
Shares repurchased	(550)	0	[2]	0	0	0	(550)	(550)	0	0	[3]
Net tax benefit (shortfall) from stock-based compensation	67	67	[2]	0	0	0	0	67	0	0	[3]
Subscriptions (redemptions/ distributions) - noncontrolling interest holders	(12)	0	[2]	0	0	0	0	0	(12)	241	[3]
Net consolidations (deconsolidations) of sponsored investment funds	(6)	0	[2]	0	0	0	0	0	(6)	(219)	[3]
Other comprehensive income (loss)	(66)	0	[2]	0	0	(66)	0	(66)	0	0	[3]
Balance at Jun. 30, 2015	$ 27,872	$ 19,254	[2]	$ 11,052	$ 0	$ (339)	$ (2,191)	$ 27,776	$ 96	$ 258	[3]
[1]	Amounts include $2 million of common stock at both June 30, 2014 and December 31, 2013.
[2]	Amounts include $2 million of common stock at both June 30, 2015 and December 31, 2014.
[3]	Amounts include noncontrolling interests of consolidated variable interest entities ("VIEs").

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Changes in Equity (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Additional Paid-in Capital, value of stock	$ 2	$ 2	$ 2	$ 2

Condensed Consolidated Stateme9

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities
Net income	$ 1,651	$ 1,585
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	128	145
Amortization of deferred sales commissions	25	29
Stock-based compensation	269	236
Deferred income tax expense (benefit)	1	102
Other gains	(40)	0
Net (gains) losses on nontrading investments	6	(54)
Purchases of investments within consolidated sponsored investment funds	(1)	(139)
Proceeds from sales and maturities of investments within consolidated sponsored investment funds	1	84
Assets and liabilities of consolidated VIEs:
Change in cash and cash equivalents	(14)	(209)
Net (gains) losses within consolidated VIEs	(16)	(12)
Net (purchases) proceeds within consolidated VIEs	(122)	(131)
(Earnings) losses from equity method investees	(51)	(92)
Distributions of earnings from equity method investees	25	22
Changes in operating assets and liabilities:
Accounts receivable	(253)	(1,964)
Investments, trading	(425)	(102)
Other assets	(291)	(234)
Accrued compensation and benefits	(732)	(668)
Accounts payable and accrued liabilities	233	2,011
Other liabilities	103	(77)
Cash flows from operating activities	496	532
Cash flows from investing activities
Purchases of investments	(162)	(239)
Proceeds from sales and maturities of investments	314	337
Distributions of capital from equity method investees	46	33
Net consolidations (deconsolidations) of sponsored investment funds	(81)	(3)
Acquisition	(88)	0
Purchases of property and equipment	(134)	(34)
Cash flows from investing activities	(105)	94
Cash flows from financing activities
Proceeds from long-term borrowings	787	997
Repayments of long-term borrowings	(750)	0
Cash dividends paid	(753)	(692)
Repurchases of common stock	(777)	(832)
Net proceeds from (repayments of) borrowings by consolidated VIEs	0	344
Net (redemptions/distributions paid) / subscriptions received from noncontrolling interests holders	229	158
Excess tax benefit from stock-based compensation	67	93
Other financing activities	6	(1)
Cash flows from financing activities	(1,191)	67
Effect of exchange rate changes on cash and cash equivalents	(16)	44
Net increase (decrease) in cash and cash equivalents	(816)	737
Cash and cash equivalents, beginning of period	5,723	4,390
Cash and cash equivalents, end of period	4,907	5,127
Supplemental disclosure of cash flow information:
Interest	99	100
Interest on borrowings of consolidated VIEs	0	48
Income taxes (net of refunds)	708	696
Supplemental schedule of noncash investing and financing transactions:
Issuance of common stock	470	621
Increase (decrease) in noncontrolling interests due to net consolidation (deconsolidation) of sponsored investment funds	(39)	(193)
Increase (decrease) in borrowings due to deconsolidation of VIEs	$ (3,389)	$ 0

Business Overview

Business Overview	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Overview	1. Business Overview BlackRock, Inc. (together, with its subsidiaries, unless the context otherwise indicates, “BlackRock” or the “Company”) is a leading publicly traded investment management firm providing a broad range of investment and risk management services to institutional and retail clients worldwide. BlackRock’s diverse platform of active (alpha) and index (beta) investment strategies across asset classes enables the Company to tailor investment outcomes and asset allocation solutions for clients. Product offerings include single- and multi-asset class portfolios investing in equities, fixed income, alternatives and money market instruments. Products are offered directly and through intermediaries in a variety of vehicles, including open-end and closed-end mutual funds, iShares ® BlackRock Solutions ® Aladdin ® At June 30, 2015, The PNC Financial Services Group, Inc. (“PNC”) held 21.0% of the Company’s voting common stock and 22.0% of the Company’s capital stock, which includes outstanding common and nonvoting preferred stock.

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Significant Accounting Policies	2. Significant Accounting Policies Basis of Presentation The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates. Certain financial information that normally is included in annual financial statements, including certain financial statement footnotes, is not required for interim reporting purposes and has been condensed or omitted herein. These condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements and notes related thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014, which was filed with the Securities and Exchange Commission (“SEC”) on February 27, 2015 (“2014 Form 10-K”). The interim financial information at June 30, 2015 and for the three and six months ended June 30, 2015 and 2014 is unaudited. However, in the opinion of management, the interim information includes all normal recurring adjustments necessary for the fair presentation of the Company’s results for the periods presented. The results of operations for interim periods are not necessarily indicative of results to be expected for the full year. Accounting Pronouncements Adopted in the Six Months Ended June 30, 2015 Amendments to the Consolidation Analysis. Consolidation: Amendments to the Consolidation Analysis The Company early adopted ASU 2015-02 using the modified retrospective method with an effective adoption date of January 1, 2015. The modified retrospective method did not require the restatement of prior year periods. In connection with the adoption of ASU 2015-02, the Company reevaluated all of its investment products for consolidation. As of January 1, 2015, the Company deconsolidated all of its previously consolidated CLOs as its fee arrangements were no longer deemed variable interests and it held no other interests in these entities. The adoption of the ASU also resulted in the consolidation of certain investment products that were not previously consolidated. Upon adoption, these products became consolidated VIEs as the Company is considered the party with both (i) the power to direct the activities of the VIE that most significantly impact its economic performance and (ii) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. The impact to the Company’s condensed consolidated statement of financial condition upon adoption of ASU 2015-02 was primarily the deconsolidation of approximately $3.6 billion of assets, $3.6 billion of liabilities related to the Company’s CLOs with an adjustment to appropriated retained earnings/loss of $19 million. In addition, certain investment products previously accounted for as voting rights entities (“VREs”) became VIEs under the new accounting guidance. Debt Issuance Costs. Simplifying the Presentation of Debt Issuance Costs Disclosures for Investments in Certain Entities that Calculate NAV Per Share. Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent) Fair Value Measurements. Hierarchy of Fair Value Inputs Level 1 Inputs: Quoted prices (unadjusted) in active markets for identical assets or liabilities at the reporting date. • Level 1 assets may include listed mutual funds, ETFs, listed equities and certain exchange-traded derivatives. Level 2 Inputs: Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities that are not active; quotes from pricing services or brokers for which the Company can determine that orderly transactions took place at the quoted price or that the inputs used to arrive at the price are observable; and inputs other than quoted prices that are observable, such as models or other valuation methodologies. • Level 2 assets may include debt securities, bank loans, short-term floating-rate notes, asset-backed securities, securities held within consolidated hedge funds, restricted public securities valued at a discount, as well as over-the-counter derivatives, including interest and inflation rate swaps and foreign currency exchange contracts that have inputs to the valuations that generally can be corroborated by observable market data. Level 3 Inputs: Unobservable inputs for the valuation of the asset or liability, which may include nonbinding broker quotes. Level 3 assets include investments for which there is little, if any, market activity. These inputs require significant management judgment or estimation. • Level 3 assets may include direct private equity investments held within consolidated funds, bank loans and bonds. • Level 3 liabilities include contingent liabilities related to acquisitions valued based upon discounted cash flow analysis using unobservable market data. Level 3 liabilities at December 31, 2014 also included borrowings of consolidated collateralized loan obligations (“CLOs”) valued based upon nonbinding single-broker quotes. Significance of Inputs. Valuation Techniques. A significant number of inputs used to value equity, debt securities and bank loans is sourced from third-party pricing vendors. Generally, prices obtained from pricing vendors are categorized as Level 1 inputs for identical securities traded in active markets and as Level 2 for other similar securities if the vendor uses observable inputs in determining the price. Annually, BlackRock’s internal valuation committee or other designated groups review both the valuation methodologies, including the general assumptions and methods used to value various asset classes, and operational processes with these vendors. On a quarterly basis, meetings are held with key vendors to identify any significant changes to the vendors’ processes. In addition, quotes obtained from brokers generally are nonbinding and categorized as Level 3 inputs. However, if the Company is able to determine that market participants have transacted for the asset in an orderly manner near the quoted price or if the Company can determine that the inputs used by the broker are observable, the quote is classified as a Level 2 input. Investments Measured at Net Asset Values. Derivative Instruments and Hedging Activities Changes in the fair value of the Company’s derivative financial instruments are generally recognized in earnings and, where applicable, are offset by the corresponding gain or loss on the related foreign-denominated assets or liabilities or hedged investments, on the condensed consolidated statements of income. The Company may also use financial instruments designated as net investment hedges for accounting purposes to hedge net investments in international subsidiaries whose functional currency is different from the reporting currency of the parent company. The gain or loss from revaluing accounting hedges of net investments in foreign operations at the spot rate is deferred and reported within accumulated other comprehensive income on the condensed consolidated statements of financial condition. The Company reassesses the effectiveness of its net investment hedge on a quarterly basis. Consolidation. Consolidation of Variable Interest Entities Prior to the adoption of ASU 2015-02, the Company used two methods for determining whether it was the PB of a VIE depending on the nature and characteristics of the entity. For CLOs, the Company was deemed to be the PB if it had the power to direct activities of the entity that most significantly impacted the entity’s economic performance and had the obligation to absorb losses or the right to receive benefits that potentially could be significant to the VIE. For certain sponsored investment funds, the Company was deemed to be the PB if it absorbed the majority of the entity’s expected losses, received a majority of the entity’s expected residual returns, or both. Following the adoption of ASU 2015-02, all VIEs are evaluated for consolidation under a single method. The PB of a VIE is defined as the variable interest holder that has a controlling financial interest in the VIE. A controlling financial interest is defined as (i) the power to direct the activities of the VIE that most significantly impact its economic performance and (ii) the obligation to absorb losses of the entity or the right to receive benefits from the entity that potentially could be significant to the VIE. The consolidation analysis can generally be performed qualitatively, however, if it is not readily apparent that the Company is not the PB, a quantitative analysis may also be performed. Consolidation of Voting Rights Entities Retention of Specialized Investment Company Accounting Principles. Money Market Fee Waivers Separate Account Assets and Liabilities . The net investment income attributable to separate account assets supporting individual and group pension contracts accrues directly to the contract owner and is not reported on the condensed consolidated statements of income. While BlackRock has no economic interest in these separate account assets and liabilities, BlackRock earns policy administration and management fees associated with these products, which are included in investment advisory, administration fees and securities lending revenue on the condensed consolidated statements of income. Separate Account Collateral Assets Held and Liabilities Under Securities Lending Agreements. The Company records on the condensed consolidated statements of financial condition the cash and noncash collateral received under these BlackRock Life Limited securities lending arrangements as its own asset in addition to an equal and offsetting collateral liability for the obligation to return the collateral. During the three months ended June 30, 2015 and 2014, the Company had not resold or repledged any of the collateral received under these arrangements. At June 30, 2015 and December 31, 2014, the fair value of loaned securities held by separate accounts was approximately $29.6 billion and $30.6 billion, respectively, and the fair value of the collateral held under these securities lending agreements was approximately $32.4 billion and $33.7 billion, respectively. Recent Accounting Pronouncements Not Yet Adopted Revenue from Contracts with Customers. Revenue from Contracts with Customers

Investments

Investments	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Investments	3. Investments A summary of the carrying value of total investments is as follows: (in millions) June 30, 2015 December 31, Available-for-sale investments $35 $201 Held-to-maturity investments 100 79 Trading investments: Consolidated sponsored investment funds 576 443 Other equity and debt securities 17 29 Deferred compensation plan mutual funds 67 64 Total trading investments 660 536 Other investments: Consolidated sponsored investment funds - 270 Equity method investments 501 633 Deferred compensation plan equity method investments 17 21 Cost method investments (1) 96 96 Carried interest 27 85 Total other investments 641 1,105 Total investments $1,436 $1,921 (1) Amounts primarily include Federal Reserve Bank (“FRB”) Stock. At June 30, 2015, the Company consolidated $576 million of investments held by consolidated sponsored investment funds accounted for as VREs, which were classified as trading investments. At December 31, 2014, the Company consolidated $713 million of investments held by consolidated sponsored investment funds accounted for as VREs of which $443 million and $270 million were classified as trading investments and other investments, respectively. Available-for-Sale Investments A summary of the cost and carrying value of investments classified as available-for-sale investments is as follows: (in millions) Gross Unrealized Carrying June 30, 2015 Cost Gains Losses Equity securities of sponsored investment funds $35 $2 ($2) $35 December 31, 2014 Equity securities of sponsored investment funds $205 $5 ($9) $201 Available-for-sale investments primarily included seed investments in BlackRock sponsored mutual funds. Held-to-Maturity Investments The carrying value of held-to-maturity investments was $100 million and $79 million at June 30, 2015 and December 31, 2014, respectively. Held-to-maturity investments included foreign government debt held for regulatory purposes. The amortized cost (carrying value) of these investments approximated fair value. At June 30, 2015, $86 million of these investments mature within one year and $14 million mature after five years through ten years. Trading Investments A summary of the cost and carrying value of trading investments is as follows: (in millions) June 30, 2015 December 31, 2014 Cost Carrying Cost Carrying Trading investments: Deferred compensation plan mutual funds $48 $67 $48 $64 Equity securities/multi-asset mutual funds 156 156 210 239 Debt securities/fixed income mutual funds: Corporate debt 227 226 109 110 Government debt 167 169 100 103 Asset/mortgage backed debt 42 42 20 20 Total trading investments $640 $660 $487 $536 At June 30, 2015, trading investments included $436 million of debt securities and $140 million of equity securities held by consolidated sponsored investment funds accounted for as VREs, $67 million of certain deferred compensation plan mutual fund investments and $17 million of other equity and debt securities. At December 31, 2014, trading investments included $223 million of debt securities and $220 million of equity securities held by consolidated sponsored investment funds accounted for as VREs, $64 million of certain deferred compensation plan mutual fund investments and $29 million of other equity and debt securities. Other Investments A summary of the cost and carrying value of other investments is as follows: (in millions) June 30, 2015 December 31, 2014 Cost Carrying Cost Carrying Other investments: Consolidated sponsored investment funds accounted for as VREs $- $- $268 $270 Equity method investments 399 501 518 633 Deferred compensation plan equity method investments 16 17 21 21 Cost method investments: Federal Reserve Bank stock 93 93 92 92 Other 3 3 4 4 Total cost method investments 96 96 96 96 Carried interest (1) - 27 - 85 Total other investments $511 $641 $903 $1,105 (1) Carried interest related to VREs. Consolidated sponsored investment funds accounted for as VREs include third-party private equity funds, direct investments in private companies and third-party hedge funds held by BlackRock sponsored investment funds. Equity method investments primarily include BlackRock’s direct investments in certain BlackRock sponsored investment funds. In addition, the Company accounts for its interest in PennyMac Financial Services, Inc. (“PennyMac”) as an equity method investment. At June 30, 2015 and December 31, 2014 the Company’s investment in PennyMac was excluded from the balances in the table above and included in other assets on the condensed consolidated statements of financial condition. The carrying value and fair value of the Company’s interest (approximately 20% or 16 million shares and units) was approximately $191 million and $282 million, respectively, at June 30, 2015 and approximately $167 million and $269 million, respectively, at December 31, 2014. The fair value of the Company’s interest reflected the PennyMac stock price at June 30, 2015 and December 31, 2014, respectively (a Level 1 input). Cost method investments include nonmarketable securities, primarily including FRB stock, which is held for regulatory purposes and is restricted from sale. At June 30, 2015 and December 31, 2014, there were no indicators of impairment on these investments. Carried interest represents allocations to BlackRock’s general partner capital accounts from certain funds. These balances are subject to change upon cash distributions, additional allocations or reallocations back to limited partners within the respective funds.

Consolidated Voting Rights Enti

Consolidated Voting Rights Entities	6 Months Ended
	Jun. 30, 2015
Text Block [Abstract]
Consolidated Voting Rights Entities	4. Consolidated Voting Rights Entities The Company consolidates certain sponsored investment funds accounted for as VREs because it is deemed to control such funds. The investments owned by these consolidated VREs are classified as trading or other investments. The following table presents the balances related to these consolidated VREs that were recorded on the condensed consolidated statements of financial condition, including BlackRock’s net interest in these funds: (in millions) June 30, December 31, Cash and cash equivalents $120 $120 Investments: Trading investments 576 443 Other investments - 270 Other assets 35 20 Other liabilities (79 ) (18 ) Noncontrolling interests (97 ) (139 ) BlackRock’s net interests in consolidated VREs $555 $696 BlackRock’s total exposure to consolidated VREs represents the value of its economic ownership interest in these sponsored investment funds. Valuation changes associated with investments held at fair value by these consolidated VREs are reflected in nonoperating income (expense) and partially offset in net income (loss) attributable to noncontrolling interests for the portion not attributable to BlackRock. In addition, at June 30, 2015 and December 31, 2014, certain consolidated sponsored investment funds, which were accounted for as VIEs, were excluded from the balances in the table above as the balances for these investment products are reported separately on the condensed consolidated statements of financial condition. See Note 5, Variable Interest Entities Significant Accounting Policies The Company cannot readily access cash and cash equivalents held by consolidated VREs to use in its operating activities. In addition, the Company cannot readily sell investments held by consolidated VREs to obtain cash for use in the Company’s operations.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	5. Variable Interest Entities In the normal course of business, the Company is the manager of various types of sponsored investment vehicles, which may be considered VIEs. The Company may from time to time own equity or debt securities or enter into derivatives with the vehicles, each of which are considered variable interests. The Company’s involvement in financing the operations of the VIEs is generally limited to its investments in the entity. The Company consolidates entities when it is determined to be the PB under current VIE accounting guidance. See Note 2, Significant Accounting Policies As a result of the adoption of ASU 2015-02, the Company deconsolidated all previously consolidated CLOs effective January 1, 2015 as its fees are no longer deemed variable interests. The Company also consolidated certain investment products that were not previously consolidated as a result of the adoption of ASU 2015-02. See Note 2, Significant Accounting Policies – Accounting Pronouncements Adopted in the Six Months ended June 30, 2015 2015-02. Consolidated VIEs. The Company’s consolidated VIEs under previous accounting guidance as of December 31, 2014 primarily included CLOs in which BlackRock did not have an investment; however, as the collateral manager, BlackRock was deemed to have both the power to direct the most significant activities of the CLOs and the right to receive benefits that could potentially be significant to the CLOs. Consolidated VIE assets and liabilities are presented after intercompany eliminations at June 30, 2015 and December 31, 2014 in the following table: (in millions) June 30, 2015 December 31, 2014 Assets of consolidated VIEs: Cash and cash equivalents $64 $278 Investments 901 3,320 Other assets 40 32 Total investments and other assets 941 3,352 Liabilities of consolidated VIEs: Borrowings - (3,389 ) Other liabilities (192 ) (245 ) Appropriated retained earnings - 19 Noncontrolling interests of consolidated VIEs (257 ) (15 ) Total BlackRock net interests in consolidated VIEs $556 $- The Company recorded $12 million and $16 million of nonoperating income, respectively, during the three and six months ended June 30, 2015 related to consolidated VIEs. Net income attributable to noncontrolling interests related to consolidated VIEs during both the three and six months ended June 30, 2015 was $7 million. The Company recorded $28 million and $12 million of nonoperating income and an equal and offsetting income/loss attributable to nonredeemable noncontrolling interests related to consolidated VIEs during the three and six months ended June 30, 2014, respectively. Non-Consolidated VIEs (in millions) Variable Interests on the Condensed Consolidated Maximum (1) At June 30, 2015 Investments Advisory Other Net Assets (Liabilities) Sponsored investment products $51 $5 ($6) $73 At December 31, 2014 CDOs/CLOs $- $2 ($5) $19 Other sponsored investment funds: Collective trusts - 191 - 191 Other 57 177 (3) 234 Total $57 $370 ($8) $444 (1) At both June 30, 2015 and December 31, 2014, BlackRock’s maximum risk of loss associated with these VIEs primarily related to collecting advisory fee receivables and BlackRock’s investments. The net assets of sponsored investment products that are nonconsolidated VIEs approximated $3 billion at June 30, 2015. Net assets of other sponsored investment funds approximated $1.7 trillion to $1.8 trillion at December 31, 2014 and included approximately $1.4 trillion of collective trusts at December 31, 2014. Upon the adoption of ASU 2015-02, BlackRock no longer has a variable interest in collective trusts, as BlackRock does not have any economic interest and earns at-market fees from these products.

Fair Value Disclosures

Fair Value Disclosures	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures	6. Fair Value Disclosures Fair Value Hierarchy Assets and liabilities measured at fair value on a recurring basis, investments measured at NAV and other assets not held at fair value June 30, 2015 (in millions) Quoted Active Markets for (Level 1) Significant Other Significant Investments (1) Other Assets (2) June 30, 2015 Assets: Investments Available-for-sale: Equity securities of sponsored investment funds $ 33 $ 2 $ - $ - $ - $ 35 Held-to-maturity debt securities - - - - 100 100 Trading: Deferred compensation plan mutual funds 67 - - - - 67 Equity/Multi-asset mutual funds 156 - - - - 156 Debt securities / fixed income mutual funds 1 436 - - - 437 Total trading 224 436 - - - 660 Other investments: Equity method: Equity and fixed income mutual funds 135 - - - - 135 Other - - - 358 8 366 Total equity method 135 - - 358 8 501 Deferred compensation plan equity method investments - - - 17 - 17 Cost method investments - - - - 96 96 Carried interest - - - - 27 27 Total investments 392 438 - 375 231 1,436 Separate account assets 116,340 45,767 - - 804 162,911 Separate account collateral held under securities lending agreements: Equity securities 28,664 - - - - 28,664 Debt securities - 3,773 - - - 3,773 Total separate account collateral held under securities lending agreements 28,664 3,773 - - - 32,437 Assets of consolidated VIEs: Private / public equity (3) 10 7 166 164 - 347 Equity securities 178 - - - - 178 Debt securities - 173 - - - 173 Other - - - 91 - 91 Carried interest - - - - 112 112 Total assets of consolidated VIEs 188 180 166 255 112 901 Total $ 145,584 $ 50,158 $ 166 $ 630 $ 1,147 $ 197,685 Liabilities: Separate account collateral liabilities under securities lending agreements $ 28,664 $ 3,773 $ - $ - $ - $ 32,437 Other liabilities (4) - 6 56 - - 62 Total $ 28,664 $ 3,779 $ 56 $ - $ - $ 32,499 (1) Amounts are comprised of certain investments measured at fair value using NAV (or its equivalent) as a practical expedient. These investments in accordance with current accounting guidance have not been classified in the fair value hierarchy (see Note 2, Significant Accounting Policies (2) Amounts are comprised of investments held at cost or amortized cost, carried interest and certain equity method investments, which include sponsored investment funds and other assets, which are not accounted for under a fair value measure. In accordance with GAAP, certain equity method investees do not account for both their financial assets and liabilities under fair value measures; therefore, the Company’s investment in such equity method investees may not represent fair value. (3) Level 3 amounts include $166 million of direct investments in private equity companies held by private equity funds. (4) Amounts include a derivative (see Note 7, Derivatives and Hedging Commitments and Contingencies Assets and liabilities measured at fair value on a recurring basis, investments measured at NAV and other assets not held at fair value December 31, 2014 (in millions) Quoted Active Markets for (Level 1) Significant Other Significant Investments (1) Other Assets (2) December 31, 2014 Assets: Investments Available-for-sale: Equity securities of sponsored investment funds $ 198 $ 3 $ - $ - $ - $ 201 Held-to-maturity debt securities - - - - 79 79 Trading: Deferred compensation plan mutual funds 64 - - - - 64 Equity/Multi-asset mutual funds 239 - - - - 239 Debt securities / fixed income mutual funds 11 222 - - - 233 Total trading 314 222 - - - 536 Other investments: Consolidated sponsored investment funds private / public equity (3) 11 11 80 168 - 270 Equity method: Fixed income mutual funds 29 - - - - 29 Other 98 - - 493 13 604 Total equity method 127 - - 493 13 633 Deferred compensation plan equity method investments - - - 21 - 21 Cost method investments - - - - 96 96 Carried interest - - - - 85 85 Total investments 650 236 80 682 273 1,921 Separate account assets 113,566 46,866 - - 855 161,287 Separate account collateral held under securities lending agreements: Equity securities 30,387 - - - - 30,387 Debt securities - 3,267 - - - 3,267 Total separate account collateral held under securities lending agreements 30,387 3,267 - - - 33,654 Assets of consolidated VIEs: Bank loans and other assets - 2,958 302 - 32 3,292 Bonds - 29 18 - - 47 Private / public equity - 3 - 10 - 13 Total assets of consolidated VIEs - 2,990 320 10 32 3,352 Total $ 144,603 $ 53,359 $ 400 $ 692 $ 1,160 $ 200,214 Liabilities: Borrowings of consolidated VIEs $ - $ - $ 3,389 $ - $ - $ 3,389 Separate account collateral liabilities under securities lending agreements 30,387 3,267 - - - 33,654 Other liabilities (4) - 5 39 - - 44 Total $ 30,387 $ 3,272 $ 3,428 $ - $ - $ 37,087 (1) Amounts are comprised of certain investments measured at fair value using NAV (or its equivalent) as a practical expedient. These investments in accordance with current accounting guidance have not been classified in the fair value hierarchy (see Note 2, Significant Accounting Policies (2) Amounts are comprised of investments held at cost or amortized cost, carried interest and certain equity method investments, which include sponsored investment funds and other assets, which are not accounted for under a fair value measure. In accordance with GAAP, certain equity method investees do not account for both their financial assets and liabilities under fair value measures; therefore, the Company’s investment in such equity method investees may not represent fair value. (3) Level 3 amounts include $80 million of direct investments in private equity companies held by private equity funds. (4) Amounts include a derivative (see Note 7, Derivatives and Hedging Commitments and Contingencies Level 3 Assets. Level 3 assets include bank loans and bonds valued based on single-broker nonbinding quotes and direct private equity investments valued using the market approach or the income approach as described above. Level 3 Liabilities. Level 3 other liabilities primarily include contingent liabilities related to certain acquisitions, which were valued based upon discounted cash flow analyses using unobservable market data inputs. Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis for the Three Months Ended June 30, 2015 (1) (in millions) March 31, (2) Realized Purchases Sales and Issuances and Transfers Transfers June 30, Total net (3) Assets: Assets of consolidated VIEs: Private equity $149 $8 $9 $- $- $- $- $166 $8 Liabilities: Other liabilities $51 ($5 ) $- $- $- $- $- $56 - (1) Upon adoption of ASU 2015-07, investments measured at NAV are no longer required to be categorized within the fair value hierarchy. See Note 2, Significant Accounting Policies (2) Amounts reflect the adoption of ASU 2015-02. See Note 2, Significant Accounting Policies (3) Earnings attributable to the change in unrealized gains (losses) relating to assets still held at the reporting date. Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis for the Six Months Ended June 30, 2015 (1) (in millions) December 31, Realized Purchases Sales and Issuances and (2)(3) Transfers Transfers June 30, Total net (4) Assets: Investments: Consolidated sponsored investment funds- Private equity $80 $- $- $- ($80 ) $- $- $- $ - Assets of consolidated VIEs: Private equity - 7 79 - 80 - - 166 7 Bank loans 302 - - - (302 ) - - - - Bonds 18 - - - (18 ) - - - - Total Level 3 assets of consolidated VIEs 320 7 79 - (240 ) - - 166 7 Total Level 3 assets $400 $7 $79 $- ($320 ) $- $- $166 $ 7 Liabilities: Borrowings of consolidated VIEs $3,389 $- $- $- ($3,389 ) $- $- $- - Other liabilities 39 (3 ) - - 14 - - 56 - Total Level 3 liabilities $3,428 ($3 ) $- $- ($3,375 ) $- $- $56 - (1) Upon adoption of ASU 2015-07, investments measured at NAV are no longer required to be categorized within the fair value hierarchy. See Note 2, Significant Accounting Policies (2) Amounts include the consolidation (deconsolidation) of VIEs due to the adoption of ASU 2015-02 effective January 1, 2015. (3) Amounts include a contingent liability related to an acquisition. (4) Earnings attributable to the change in unrealized gains (losses) relating to assets still held at the reporting date. Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis for the Three Months Ended June 30, 2014 (1) (in millions) March 31, Realized Purchases Sales and Issuances and (2) Transfers Transfers June 30, Total net (3) Assets: Investments Consolidated sponsored investment funds: Hedge funds $3 ($2 ) $- $- $- $- $- $1 $- Private equity 64 2 13 - - - - 79 - Assets of consolidated VIEs: Bank loans 147 - 76 (30 ) - 36 (76 ) 153 Bonds 28 - - (3 ) - - - 25 Total Level 3 assets of consolidated VIEs 175 - 76 (33 ) - 36 (76 ) 178 N/A (4) Total Level 3 assets $242 $- $ 89 ($ 33 ) $- $ 36 ($ 76 ) $258 Liabilities: Borrowings of consolidated VIEs $2,244 $9 $- $- $464 $- $- $2,699 N/A (4) Other liabilities 42 (1 ) - - - - - 43 - Total Level 3 liabilities $2,286 $8 $- $- $464 $- $- $2,742 N/A – not applicable (1) Upon adoption of ASU 2015-07, investments measured at NAV are no longer required to be categorized within the fair value hierarchy. See Note 2, Significant Accounting Policies (2) Amount includes net proceeds from borrowings of consolidated VIEs. (3) Earnings attributable to the change in unrealized gains (losses) relating to assets still held at the reporting date. (4) The net gain (loss) on consolidated VIEs is solely attributable to noncontrolling interests on the condensed consolidated statements of income. Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis for the Six Months Ended June 30, 2014 (1) (in millions) December 31, Realized Purchases Sales and Issuances and (2) Transfers (3) Transfers June 30, Total net (4) Assets: Investments Consolidated sponsored investment funds: Hedge funds $2 ($1 ) $- $- $- $- $- $1 $- Private equity 28 1 13 - - 37 - 79 $- Assets of consolidated VIEs: Bank loans 129 - 92 (43 ) - 109 (134 ) 153 Bonds 35 - - (10 ) - - - 25 Total Level 3 assets of consolidated VIEs 164 - 92 (53 ) - 109 (134 ) 178 N/A (5) Total Level 3 assets $194 $- $105 ($ 53 ) $- $146 ($134 ) $258 Liabilities: Borrowings of consolidated VIEs $2,369 $14 $- $- $ 344 $- $- $ 2,699 N/A (5) Other liabilities 42 (1 ) - - - - - 43 - Total Level 3 liabilities $ 2,411 $13 $- $- $ 344 $- $- $ 2,742 N/A – not applicable (1) Upon adoption of ASU 2015-07, investments measured at NAV are no longer required to be categorized within the fair value hierarchy. See Note 2, Significant Accounting Policies (2) Amount primarily includes net proceeds from borrowings of consolidated VIEs. (3) Includes investments previously held at cost. (4) Earnings attributable to the change in unrealized gains (losses) relating to assets still held at the reporting date. (5) The net gain (loss) on consolidated VIEs is solely attributable to noncontrolling interests on the condensed consolidated statements of income. Realized and Unrealized Gains (Losses) for Level 3 Assets and Liabilities. Transfers in and/or out of Levels. Assets of Consolidated VIEs Significant Issuances and Other Settlements Significant Accounting Policies During the three and six months ended June 30, 2014, other settlements included $612 million of proceeds from borrowings of a consolidated CLO. Disclosures of Fair Value for Financial Instruments Not Held at Fair Value June 30, 2015 December 31, 2014 (in millions) Carrying Estimated Carrying Estimated Fair Value Hierarchy Financial Assets: Cash and cash equivalents $ 4,907 $ 4,907 $ 5,723 $ 5,723 Level 1 (1) (2) Accounts receivable 2,347 2,347 2,120 2,120 Level 1 (3) Cash and cash equivalents of consolidated VIEs 64 64 278 278 Level 1 (1) Financial Liabilities: Accounts payable and accrued liabilities 1,284 1,284 1,035 1,035 Level 1 (3) Long-term borrowings 4,947 5,219 4,922 5,309 Level 2 (4) (1) Cash and cash equivalents are carried at either cost or amortized cost, which approximates fair value due to their short-term maturities. (2) At June 30, 2015 and December 31, 2014, approximately $129 million and $100 million, respectively, of money market funds were recorded within cash and cash equivalents on the condensed consolidated statements of financial condition. Money market funds are valued based on quoted market prices, or $1.00 per share, which generally is the NAV of the fund. (3) The carrying amounts of accounts receivable, accounts payable and accrued liabilities approximate fair value due to their short-term nature. (4) Long-term borrowings are recorded at amortized cost net of debt issuance costs. The fair value of the long-term borrowings, including the current portion of long-term borrowings, is estimated using market prices at the end of June 2015 and December 2014, respectively. See Note 10, Borrowings Investments in Certain Entities that Calculate Net Asset Value Per Share. As a practical expedient to value certain investments that do not have a readily determinable fair value and have attributes of an investment company, the Company uses NAV as the fair value. The following tables list information regarding all investments that use a fair value measurement to account for both their financial assets and financial liabilities in their calculation of a NAV per share (or equivalent). June 30, 2015 (in millions) Ref Fair Value Total Redemption Frequency Redemption Equity method: (1) Hedge funds/funds of hedge funds (b ) $180 $ 93 Daily/Monthly (28%) Quarterly (36%) N/R (36%) 1 – 90 days Private equity funds (c ) 93 66 N/R N/R Real estate funds (d ) 85 20 Quarterly (26%) N/R (74%) 60 days Deferred compensation plan investments (e ) 17 6 N/R N/R Consolidated VIEs: Private equity funds of funds (a ) 164 17 N/R N/R Hedge fund (b ) 91 - Quarterly 90 days Total $630 $ 202 December 31, 2014 (in millions) Ref Fair Value Total Redemption Frequency Redemption Consolidated VREs: Private equity funds of funds (a ) $168 $22 N/R N/R Equity method: (1) Hedge funds/funds of hedge funds (b ) 277 39 Daily/Monthly (29%) Quarterly (48%) N/R (23%) 1 – 90 days Private equity funds (c ) 107 61 N/R N/R Real estate funds (d ) 109 1 Quarterly (19%) N/R (81%) 60 days Deferred compensation plan investments (e ) 21 5 N/R N/R Consolidated VIEs: Private equity fund (f ) 10 1 N/R N/R Total $692 $ 129 N/R – not redeemable (1) Comprised of equity method investments, which include investment companies, which account for their financial assets and most financial liabilities under fair value measures; therefore, the Company’s investment in such equity method investees approximates fair value. (a) This category includes the underlying third-party private equity funds within consolidated BlackRock sponsored private equity funds of funds. The fair values of the investments in the third-party funds have been estimated using capital accounts representing the Company’s ownership interest in each fund in the portfolio as well as other performance inputs. These investments are not subject to redemption; however, for certain funds, the Company may sell or transfer its interest, which may need approval by the general partner of the underlying funds. Due to the nature of the investments in this category, the Company reduces its investment by distributions that are received through the realization of the underlying assets of the funds. It is estimated that the underlying assets of these funds will be liquidated over a weighted-average period of approximately six years and seven years at June 30, 2015 and December 31, 2014. The total remaining unfunded commitments to other third-party funds were $18 million at June 30, 2015 and $22 million at December 31, 2014. The Company had contractual obligations to the consolidated funds of $31 million at both June 30, 2015 and December 31, 2014. (b) This category includes hedge funds and funds of hedge funds that invest primarily in equities, fixed income securities, distressed credit, opportunistic and mortgage instruments and other third-party hedge funds. The fair values of the investments have been estimated using the NAV of the Company’s ownership interest in partners’ capital. It was estimated that the investments in the funds that are not subject to redemption will be liquidated over a weighted-average period of approximately two years at both June 30, 2015 and December 31, 2014. (c) This category includes several private equity funds that initially invest in nonmarketable securities of private companies, which ultimately may become public in the future. The fair values of these investments have been estimated using capital accounts representing the Company’s ownership interest in the funds as well as other performance inputs. The Company’s investment in each fund is not subject to redemption and is normally returned through distributions as a result of the liquidation of the underlying assets of the private equity funds. It was estimated that the investments in these funds will be liquidated over a weighted-average period of approximately four years at both June 30, 2015 and December 31, 2014. (d) This category includes several real estate funds that invest directly in real estate and real estate related assets. The fair values of the investments have been estimated using capital accounts representing the Company’s ownership interest in the funds. A majority of the Company’s investments are not subject to redemption or are not currently redeemable and are normally returned through distributions as a result of the liquidation of the underlying assets of the real estate funds. It is estimated that the investments in these funds not subject to redemptions will be liquidated over a weighted-average period of approximately five years and seven years at June 30, 2015 and December 31, 2014, respectively. (e) This category includes investments in several real estate funds. The fair values of the investments in this category have been estimated using capital accounts representing the Company’s ownership interest in partners’ capital as well as performance inputs. The investments are not subject to redemption; however, distributions as a result of the liquidation of the underlying assets will be used to settle certain deferred compensation liabilities over time. (f) This category includes the underlying third-party private equity funds within one consolidated BlackRock sponsored private equity fund of funds. The fair values of the investments in the third-party funds have been estimated using capital accounts representing the Company’s ownership interest in each fund in the portfolio as well as other performance inputs. These investments are not subject to redemption; however, for certain funds the Company may sell or transfer its interest, which may need approval by the general partner of the underlying third-party funds. Due to the nature of the investments in this category, the Company reduces its investment by distributions that are received through the realization of the underlying assets of the funds. It is estimated that the underlying assets of these funds will be liquidated over a weighted-average period of approximately one year at December 31, 2014. Total remaining unfunded commitments to other third-party funds were not material at December 31, 2014, which commitments are required to be funded by capital contributions from noncontrolling interest holders. Fair Value Option . The following table summarizes information at December 31, 2014 related to those assets and liabilities for which the fair value option was elected: (in millions) December 31, 2014 CLO Bank Loans: Aggregate principal amounts outstanding $3,338 Fair value 3,260 Aggregate unpaid principal balance in excess of (less than) fair value $78 Unpaid principal balance of loans more than 90 days past due $6 Aggregate fair value of loans more than 90 days past due 2 Aggregate unpaid principal balance in excess of fair value for loans more than 90 days past due $4 CLO Borrowings: Aggregate principal amounts outstanding $3,508 Fair value $3,389 At December 31, 2014, the principal amounts outstanding of the borrowings issued by the CLOs mature between 2016 and 2027. During the three months ended June 30, 2014, the change in fair value of the bank loans and bonds held by the CLOs resulted in a $52 million gain, which was partially offset by a $13 million loss from the change in fair value of the CLO borrowings. During the six months ended June 30, 2014, the change in fair value of the bank loans and bonds held by the CLOs resulted in a $79 million gain, which was partially offset by a $50 million loss from the change in fair value of the CLO borrowings. The net gains (losses) were recorded in net gain (loss) on consolidated VIEs on the condensed consolidated statements of income for the three and six months ended June 30, 2014. The change in fair value of the assets and liabilities included interest income and expense, respectively. Effective January 1, 2015, the Company no longer consolidates these CLOs due to the adoption of ASU 2015-02. See Note 2, Significant Accounting Policies

Derivatives and Hedging

Derivatives and Hedging	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	7. Derivatives and Hedging The Company maintains a program to enter into swaps to hedge against market price and interest rate exposures with respect to certain seed investments in sponsored investment products. At June 30, 2015, the Company had outstanding total return swaps and interest rate swaps with aggregate notional values of approximately $251 million and $86 million, respectively. At December 31, 2014, the Company had outstanding total return swaps and interest rate swaps with aggregate notional values of approximately $238 million and $84 million, respectively. The Company has entered into a derivative providing credit protection to a counterparty of approximately $17 million, representing the Company’s maximum risk of loss with respect to the provision of credit protection. The Company carries the derivative at fair value based on the expected discounted future cash flows under the arrangement. The Company executes forward foreign currency exchange contracts to mitigate the risk of certain foreign exchange movements. At June 30, 2015 and December 31, 2014, the Company had outstanding forward foreign currency exchange contracts with aggregate notional values of approximately $193 million and $201 million, respectively. Gains (losses) on total return swaps and interest rate swaps are recorded in nonoperating income (expense) and were not material to the condensed consolidated statements of income for the three and six months ended June 30, 2015 and 2014. Gains (losses) on forward foreign currency exchange contracts are recorded in other general and administration expense and were not material to the condensed consolidated statements of income for the three and six months ended June 30, 2015 and 2014. The Company consolidates certain sponsored investment funds, which may utilize derivative instruments as a part of the funds’ investment strategies. Gains (losses) on such derivatives are recorded in nonoperating income (expense) and were not material for the three and six months ended June 30, 2015 and 2014. The fair values of the outstanding derivatives were not material to the condensed consolidated statements of financial condition at both June 30, 2015 and December 31, 2014. See Note 10, Borrowings

Goodwill

Goodwill	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	8. Goodwill Goodwill activity during the six months ended June 30, 2015 was as follows: (in millions) December 31, 2014 $12,961 BKCA acquisition 19 Goodwill adjustment related to Quellos (1) (10 ) June 30, 2015 $12,970 (1) The $10 million decrease in goodwill during the six months ended June 30, 2015 resulted from tax benefits realized from tax-deductible goodwill in excess of book goodwill from the acquisition of the fund-of-funds business of Quellos Group, LLC in October 2007 (the “Quellos Transaction”). Goodwill related to the Quellos Transaction will continue to be reduced in future periods by the amount of tax benefits realized from tax-deductible goodwill in excess of book goodwill from the Quellos Transaction. The balance of the Quellos tax-deductible goodwill in excess of book goodwill was approximately $247 million and $263 million at June 30, 2015 and December 31, 2014, respectively. The $19 million increase represents goodwill from the Company’s acquisition in March 2015 of certain assets related to BlackRock Kelso Capital Advisors LLC (“BKCA”) that constituted a business under current accounting guidance for approximately $100 million, including contingent consideration.

Intangible Assets

Intangible Assets	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	9. Intangible Assets The carrying amounts of identifiable intangible assets are summarized as follows: (in millions) Indefinite-lived Finite-lived Total December 31, 2014 $16,988 $356 $17,344 Amortization expense - (70 ) (70 ) BKCA acquisition 120 - 120 June 30, 2015 $17,108 $286 $17,394 Indefinite-lived Acquired Management Contracts Indefinite-lived intangible assets increased by $120 million in the six months ended June 30, 2015, as a result of the BKCA acquisition.

Borrowings

Borrowings	6 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Borrowings	10. Borrowings Short-Term Borrowings 2015 Revolving Credit Facility. Commercial Paper Program. Long-Term Borrowings The carrying value and fair value of long-term borrowings estimated using market prices at June 30, 2015 included the following: (in millions) Maturity Amount Unamortized and Debt Carrying Value Fair Value 6.25% Notes due 2017 $700 ($2) $698 $775 5.00% Notes due 2019 1,000 (4) 996 1,118 4.25% Notes due 2021 750 (5) 745 821 3.375% Notes due 2022 750 (6) 744 773 3.50% Notes due 2024 1,000 (8) 992 1,007 1.25% Notes due 2025 780 (8) 772 725 Total Long-term Borrowings $4,980 ($33) $4,947 $5,219 Long-term borrowings at December 31, 2014 had a carrying value of $4.922 billion and a fair value of $5.309 billion determined using market prices at the end of December 2014. In June 2015, the Company fully repaid $750 million of 1.375% notes at maturity. 2025 Notes. € Upon conversion to U.S. dollars the Company designated the € See Note 12, Borrowings

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	11. Commitments and Contingencies Investment Commitments. Contingencies Contingent Payments. Derivatives and Hedging Contingent Payments Related to Business Acquisitions Legal Proceedings. Management, after consultation with legal counsel, currently does not anticipate that the aggregate liability arising out of regulatory matters or lawsuits will have a material effect on BlackRock’s results of operations, financial position, or cash flows. However, there is no assurance as to whether any such pending or threatened matters will have a material effect on BlackRock’s results of operations, financial position or cash flows in any future reporting period. Due to uncertainties surrounding the outcome of these matters, management cannot reasonably estimate the possible loss or range of loss that may arise from these matters. Indemnifications. In connection with securities lending transactions, BlackRock has issued certain indemnifications to certain securities lending clients against potential loss resulting from a borrower’s failure to fulfill its obligations under the securities lending agreement should the value of the collateral pledged by the borrower at the time of default be insufficient to cover the borrower’s obligation under the securities lending agreement. At June 30, 2015, the Company indemnified certain of its clients for their securities lending loan balances of approximately $147.3 billion. The Company held as agent, cash and securities totaling $156.5 billion as collateral for indemnified securities on loan at June 30, 2015. The fair value of these indemnifications was not material at June 30, 2015.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	12. Stock-Based Compensation Restricted stock and restricted stock units (“RSUs”) activity for the six months ended June 30, 2015 is summarized below: Outstanding at Restricted Weighted- December 31, 2014 3,401,909 $257.01 Granted 1,290,014 $344.36 Converted (1,566,979 ) $228.78 Forfeited (26,091 ) $300.08 June 30, 2015 (1) 3,098,853 $307.28 (1) At June 30, 2015, approximately 2.9 million awards are expected to vest and 0.2 million awards have vested but have not been converted. The Company values restricted stock and RSUs at their grant-date fair value as measured by BlackRock’s common stock price. In January 2015, the Company granted 952,329 RSUs to employees as part of annual incentive compensation that vest ratably over three years from the date of grant and 303,999 RSUs to employees that cliff vest 100% on January 31, 2018. At June 30, 2015, the intrinsic value of outstanding RSUs was $1.1 billion reflecting a closing stock price of $345.98. At June 30, 2015, total unrecognized stock-based compensation expense related to unvested RSUs was $499 million. The unrecognized compensation cost is expected to be recognized over the remaining weighted-average period of 1.3 years. Market Performance-based RSUs. Market performance-based RSUs outstanding at both June 30, 2015 and December 31, 2014 were 1,425,319 with a weighted average exercise price of $137.31. At June 30, 2015, approximately 1.4 million awards are expected to vest and an immaterial amount of awards have vested but have not been converted. No market performance based RSUs were granted during the six months ended June 30, 2015. At June 30, 2015, the intrinsic value of outstanding market performance-based RSUs was $493 million reflecting a closing stock price of $345.98. See Note 14, Stock-Based Compensation, At June 30, 2015, total unrecognized stock-based compensation expense related to unvested market performance-based awards was $75 million. The unrecognized compensation cost is expected to be recognized over the remaining weighted-average period of 1.4 years. Performance-Based RSUs. Pursuant to the BlackRock, Inc. Amended and Restated 1999 Stock Award and Incentive Plan, performance-based RSUs may be granted to certain employees. Each performance-based award consists of a “base” number of RSUs granted to the employee. The number of shares that an employee ultimately receives at vesting will be equal to the base number of performance-based RSUs granted, multiplied by a predetermined percentage determined in accordance with the level of attainment of Company performance measures during the performance period and could be higher or lower than the original RSU grant. The awards are generally forfeited if the employee leaves the Company before the vesting date. Performance-based RSUs are not considered participating securities as the dividend equivalents are subject to forfeiture prior to vesting of the award. In January 2015, the Company granted 262,847 performance-based RSUs to certain employees that cliff vest 100% on January 31, 2018. These awards are amortized over a service period of three years. Performance-based RSU activity for the six months ended June 30, 2015 is summarized below: Outstanding at Performance- Weighted- December 31, 2014 - $- Granted 262,847 $343.86 June 30, 2015 (1) 262,847 $ 343.86 (1) At June 30, 2015, approximately 0.3 million awards are expected to vest and an immaterial amount of awards have vested but have not been converted. At June 30, 2015, total unrecognized stock-based compensation expense related to unvested performance-based awards was $77 million. The unrecognized compensation cost is expected to be recognized over the remaining weighted-average period of 2.6 years. The Company values performance-based RSUs at their grant-date fair value as measured by BlackRock’s common stock price. The total grant-date fair market value of performance-based RSUs expected to vest was $90 million. At June 30, 2015, the intrinsic value of outstanding performance-based RSUs was $90.9 million reflecting a closing stock price of $345.98. Long-Term Incentive Plans Funded by PNC. At June 30, 2015, the remaining shares committed by PNC of 1.3 million were available to fund certain future long-term incentive awards. Stock Options. Outstanding at Shares Weighted December 31, 2014 (1) 906,719 $ 167.76 Exercised (1) (42,116 ) $ 167.76 June 30, 2015 (1) 864,603 $ 167.76 (1) The aggregate intrinsic value of options exercised during the six months ended June 30, 2015 was $8.2 million. At June 30, 2015, all options were vested. The remaining average life of stock options outstanding at June 30, 2015 is approximately two years.

Net Capital Requirements

Net Capital Requirements	6 Months Ended
	Jun. 30, 2015
Regulatory Capital Requirements [Abstract]
Net Capital Requirements	13. Net Capital Requirements The Company is required to maintain net capital in certain regulated subsidiaries within a number of jurisdictions, which is partially maintained by retaining cash and cash equivalent investments in those subsidiaries or jurisdictions. As a result, such subsidiaries of the Company may be restricted in their ability to transfer cash between different jurisdictions and to their parents. Additionally, transfers of cash between international jurisdictions, including repatriation to the United States, may have adverse tax consequences that could discourage such transfers. Capital Requirements

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	14. Accumulated Other Comprehensive Income (Loss) The following table presents changes in AOCI by component for the three and six months ended June 30, 2015 and 2014: (in millions) Unrealized gains available-for-sale (1) Benefit plans Foreign (2) Total For the Three Months Ended June 30, 2015 March 31, 2015 $ 2 $ 3 ($ 444 ) ($ 439 ) Other comprehensive income (loss) before reclassifications (1 ) - 101 100 Amount reclassified from AOCI - - - - Net other comprehensive income (loss) for the three months ended June 30, 2015 (1 ) - 101 100 June 30, 2015 $ 1 $ 3 ($ 343 ) ($ 339 ) For the Six Months Ended June 30, 2015 December 31, 2014 $ 2 $ 4 ($ 279 ) ($ 273 ) Other comprehensive income (loss) before reclassifications (1 ) (1 ) (64 ) (66 ) Amount reclassified from AOCI - - - - Net other comprehensive income (loss) for the six months ended June 30, 2015 (1 ) (1 ) (64 ) (66 ) June 30, 2015 $ 1 $ 3 ($ 343 ) ($ 339 ) (1) All amounts are net of tax. (2) Amounts in the three and six months ended June 30, 2015 include a gain from the Company’s net investment hedge of $7 million, net of tax of $4 million. (in millions) Unrealized gains available-for-sale (1) Benefit plans Foreign Total For the Three Months Ended June 30, 2014 March 31, 2014 ($ 1 ) $ 6 ($ 40 ) ($ 35 ) Other comprehensive income (loss) before reclassifications 4 - 30 34 Amount reclassified from AOCI (2),(3) 2 - - 2 Net other comprehensive income (loss) for the three months ended June 30, 2014 6 - 30 36 June 30, 2014 $ 5 $ 6 ($ 10 ) $ 1 For the Six Months Ended June 30, 2014 December 31, 2013 $ 7 $ 6 ($ 48 ) ($ 35 ) Other comprehensive income (loss) before reclassifications 4 - 38 42 Amount reclassified from AOCI (2),(3) (6 ) - - (6 ) Net other comprehensive income (loss) for the six months ended June 30, 2014 (2 ) - 38 36 June 30, 2014 $ 5 $ 6 ($ 10 ) $ 1 (1) All amounts are net of tax. (2) The tax benefit (expense) was not material for the three and six months ended June 30, 2014. (3) The pre-tax amount reclassified from AOCI was included in net gain (loss) on investments on the condensed consolidated statements of income.

Capital Stock

Capital Stock	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Capital Stock	15. Capital Stock Nonvoting Participating Preferred Stock June 30, 2015 December 31, Series A Shares authorized, $0.01 par value 20,000,000 20,000,000 Shares issued and outstanding - - Series B Shares authorized, $0.01 par value 150,000,000 150,000,000 Shares issued and outstanding (1) 823,188 823,188 Series C Shares authorized, $0.01 par value 6,000,000 6,000,000 Shares issued and outstanding (1) 1,311,887 1,311,887 Series D Shares authorized, $0.01 par value 20,000,000 20,000,000 Shares issued and outstanding - - (1) Shares held by PNC. Share Repurchases. In January 2015, the Board of Directors approved an increase in the availability of shares that may be repurchased under the Company’s existing share repurchase program to allow for the repurchase of up to a total of 9.4 million additional shares of BlackRock common stock. At June 30, 2015, there were 7.9 million shares still authorized to be repurchased.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	16. Income Taxes The three and six months ended June 30, 2015 included a $13 million and $16 million, respectively, net noncash expense, primarily associated with the revaluation of certain deferred income tax liabilities as a result of domestic state and local tax changes. The six months ended June 30, 2015 also included nonrecurring tax benefits of $69 million, primarily due to the realization of losses from changes in the Company’s organizational tax structure and the resolution of certain outstanding tax matters. The three and six months ended June 30, 2014 included a $23 million net noncash expense, primarily associated with the revaluation of certain deferred tax liabilities arising from the state and local tax effect of changes in the Company’s organizational structure. In addition, the second quarter of 2014 benefited from an improvement in the geographic mix of earnings and included a $34 million net tax benefit related to several favorable nonrecurring items.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Earnings Per Share	17. Earnings Per Share Due to the similarities in terms between BlackRock nonvoting participating preferred stock and the Company’s common stock, the Company considers its participating preferred stock to be a common stock equivalent for purposes of earnings per share (“EPS”) calculations. As such, the Company has included the outstanding nonvoting participating preferred stock in the calculation of average basic and diluted shares outstanding. The following table sets forth the computation of basic and diluted EPS for the three and six months ended June 30, 2015 and 2014 under the treasury stock method: Three Months Ended June 30, Six Months Ended June 30, (in millions, except shares and per share 2015 2014 2015 2014 Net income attributable to BlackRock $819 $808 $1,641 $1,564 Basic weighted-average shares outstanding 166,616,558 168,712,221 166,851,492 168,895,801 Dilutive effect of nonparticipating RSUs and stock options 2,498,201 2,437,932 2,567,472 2,644,217 Total diluted weighted-average shares outstanding 169,114,759 171,150,153 169,418,964 171,540,018 Basic earnings per share $4.92 $4.79 $9.84 $9.26 Diluted earnings per share $4.84 $4.72 $9.69 $9.12

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segment Information	18. Segment Information The Company’s management directs BlackRock’s operations as one business, the asset management business. As such, the Company operates in one business segment. The following table illustrates investment advisory, administration fees, securities lending revenue and performance fees, BlackRock Solutions Three Months Ended Six Months Ended (in millions) 2015 2014 2015 2014 Equity $ 1,426 $ 1,369 $ 2,732 $ 2,646 Fixed income 600 544 1,175 1,047 Multi-asset 324 310 636 599 Alternatives 244 253 476 559 Cash management 76 73 149 147 Total investment advisory, administration fees, securities lending revenue and performance fees 2,670 2,549 5,168 4,998 BlackRock Solutions 161 146 308 300 Distribution fees 13 18 30 37 Other revenue 61 65 122 113 Total revenue $ 2,905 $ 2,778 $ 5,628 $ 5,448 The following table illustrates total revenue for the three and six months ended June 30, 2015 and 2014 by geographic region. These amounts are aggregated on a legal entity basis and do not necessarily reflect where the customer resides. (in millions) Three Months Ended Six Months Ended June 30, Revenue 2015 2014 2015 2014 Americas $ 1,913 $ 1,764 $ 3,766 $ 3,546 Europe 847 882 1,588 1,639 Asia-Pacific 145 132 274 263 Total revenue $ 2,905 $ 2,778 $ 5,628 $ 5,448 The following table illustrates long-lived assets that consist of goodwill and property and equipment at June 30, 2015 and December 31, 2014 by geographic region. These amounts are aggregated on a legal entity basis and do not necessarily reflect where the asset is physically located. (in millions) June 30, December 31, Long-lived Assets Americas $ 13,232 $ 13,151 Europe 194 194 Asia-Pacific 89 83 Total long-lived assets $ 13,515 $ 13,428 Americas primarily is comprised of the United States, Canada, Brazil, Chile and Mexico, while Europe primarily is comprised of the United Kingdom. Asia-Pacific is comprised of Hong Kong, Australia, China, India, Japan, Korea, Malaysia, Singapore and Taiwan.

Acquisition

Acquisition	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Acquisition	19. Acquisition Infraestructura Institucional.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	20. Subsequent Events The Company conducted a review for subsequent events and determined that no additional subsequent events had occurred that would require accrual or additional disclosure.

Significant Accounting Polici30

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates. Certain financial information that normally is included in annual financial statements, including certain financial statement footnotes, is not required for interim reporting purposes and has been condensed or omitted herein. These condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements and notes related thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014, which was filed with the Securities and Exchange Commission (“SEC”) on February 27, 2015 (“2014 Form 10-K”). The interim financial information at June 30, 2015 and for the three and six months ended June 30, 2015 and 2014 is unaudited. However, in the opinion of management, the interim information includes all normal recurring adjustments necessary for the fair presentation of the Company’s results for the periods presented. The results of operations for interim periods are not necessarily indicative of results to be expected for the full year.
Accounting Pronouncements Adopted in the Six Months Ended June 30, 2015	Accounting Pronouncements Adopted in the Six Months Ended June 30, 2015 Amendments to the Consolidation Analysis. Consolidation: Amendments to the Consolidation Analysis The Company early adopted ASU 2015-02 using the modified retrospective method with an effective adoption date of January 1, 2015. The modified retrospective method did not require the restatement of prior year periods. In connection with the adoption of ASU 2015-02, the Company reevaluated all of its investment products for consolidation. As of January 1, 2015, the Company deconsolidated all of its previously consolidated CLOs as its fee arrangements were no longer deemed variable interests and it held no other interests in these entities. The adoption of the ASU also resulted in the consolidation of certain investment products that were not previously consolidated. Upon adoption, these products became consolidated VIEs as the Company is considered the party with both (i) the power to direct the activities of the VIE that most significantly impact its economic performance and (ii) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. The impact to the Company’s condensed consolidated statement of financial condition upon adoption of ASU 2015-02 was primarily the deconsolidation of approximately $3.6 billion of assets, $3.6 billion of liabilities related to the Company’s CLOs with an adjustment to appropriated retained earnings/loss of $19 million. In addition, certain investment products previously accounted for as voting rights entities (“VREs”) became VIEs under the new accounting guidance. Debt Issuance Costs. Simplifying the Presentation of Debt Issuance Costs Disclosures for Investments in Certain Entities that Calculate NAV Per Share. Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent)
Fair Value Measurements. Discussion of NAV investments removed from Fair Value Hierarchy	Fair Value Measurements. Hierarchy of Fair Value Inputs Level 1 Inputs: Quoted prices (unadjusted) in active markets for identical assets or liabilities at the reporting date. • Level 1 assets may include listed mutual funds, ETFs, listed equities and certain exchange-traded derivatives. Level 2 Inputs: Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities that are not active; quotes from pricing services or brokers for which the Company can determine that orderly transactions took place at the quoted price or that the inputs used to arrive at the price are observable; and inputs other than quoted prices that are observable, such as models or other valuation methodologies. • Level 2 assets may include debt securities, bank loans, short-term floating-rate notes, asset-backed securities, securities held within consolidated hedge funds, restricted public securities valued at a discount, as well as over-the-counter derivatives, including interest and inflation rate swaps and foreign currency exchange contracts that have inputs to the valuations that generally can be corroborated by observable market data. Level 3 Inputs: Unobservable inputs for the valuation of the asset or liability, which may include nonbinding broker quotes. Level 3 assets include investments for which there is little, if any, market activity. These inputs require significant management judgment or estimation. • Level 3 assets may include direct private equity investments held within consolidated funds, bank loans and bonds. • Level 3 liabilities include contingent liabilities related to acquisitions valued based upon discounted cash flow analysis using unobservable market data. Level 3 liabilities at December 31, 2014 also included borrowings of consolidated collateralized loan obligations (“CLOs”) valued based upon nonbinding single-broker quotes.
Significance of Inputs	Significance of Inputs.
Valuation Techniques	Valuation Techniques. A significant number of inputs used to value equity, debt securities and bank loans is sourced from third-party pricing vendors. Generally, prices obtained from pricing vendors are categorized as Level 1 inputs for identical securities traded in active markets and as Level 2 for other similar securities if the vendor uses observable inputs in determining the price. Annually, BlackRock’s internal valuation committee or other designated groups review both the valuation methodologies, including the general assumptions and methods used to value various asset classes, and operational processes with these vendors. On a quarterly basis, meetings are held with key vendors to identify any significant changes to the vendors’ processes. In addition, quotes obtained from brokers generally are nonbinding and categorized as Level 3 inputs. However, if the Company is able to determine that market participants have transacted for the asset in an orderly manner near the quoted price or if the Company can determine that the inputs used by the broker are observable, the quote is classified as a Level 2 input.
Investments Measured at Net Asset Values	Investments Measured at Net Asset Values.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities Changes in the fair value of the Company’s derivative financial instruments are generally recognized in earnings and, where applicable, are offset by the corresponding gain or loss on the related foreign-denominated assets or liabilities or hedged investments, on the condensed consolidated statements of income. The Company may also use financial instruments designated as net investment hedges for accounting purposes to hedge net investments in international subsidiaries whose functional currency is different from the reporting currency of the parent company. The gain or loss from revaluing accounting hedges of net investments in foreign operations at the spot rate is deferred and reported within accumulated other comprehensive income on the condensed consolidated statements of financial condition. The Company reassesses the effectiveness of its net investment hedge on a quarterly basis.
Consolidation	Consolidation. Consolidation of Variable Interest Entities Prior to the adoption of ASU 2015-02, the Company used two methods for determining whether it was the PB of a VIE depending on the nature and characteristics of the entity. For CLOs, the Company was deemed to be the PB if it had the power to direct activities of the entity that most significantly impacted the entity’s economic performance and had the obligation to absorb losses or the right to receive benefits that potentially could be significant to the VIE. For certain sponsored investment funds, the Company was deemed to be the PB if it absorbed the majority of the entity’s expected losses, received a majority of the entity’s expected residual returns, or both. Following the adoption of ASU 2015-02, all VIEs are evaluated for consolidation under a single method. The PB of a VIE is defined as the variable interest holder that has a controlling financial interest in the VIE. A controlling financial interest is defined as (i) the power to direct the activities of the VIE that most significantly impact its economic performance and (ii) the obligation to absorb losses of the entity or the right to receive benefits from the entity that potentially could be significant to the VIE. The consolidation analysis can generally be performed qualitatively, however, if it is not readily apparent that the Company is not the PB, a quantitative analysis may also be performed. Consolidation of Voting Rights Entities Retention of Specialized Investment Company Accounting Principles.
Money Market Fee Waivers	Money Market Fee Waivers
Separate Account Assets and Liabilities	Separate Account Assets and Liabilities . The net investment income attributable to separate account assets supporting individual and group pension contracts accrues directly to the contract owner and is not reported on the condensed consolidated statements of income. While BlackRock has no economic interest in these separate account assets and liabilities, BlackRock earns policy administration and management fees associated with these products, which are included in investment advisory, administration fees and securities lending revenue on the condensed consolidated statements of income.
Separate Account Collateral Assets Held and Liabilities Under Securities Lending Agreements	Separate Account Collateral Assets Held and Liabilities Under Securities Lending Agreements. The Company records on the condensed consolidated statements of financial condition the cash and noncash collateral received under these BlackRock Life Limited securities lending arrangements as its own asset in addition to an equal and offsetting collateral liability for the obligation to return the collateral. During the three months ended June 30, 2015 and 2014, the Company had not resold or repledged any of the collateral received under these arrangements. At June 30, 2015 and December 31, 2014, the fair value of loaned securities held by separate accounts was approximately $29.6 billion and $30.6 billion, respectively, and the fair value of the collateral held under these securities lending agreements was approximately $32.4 billion and $33.7 billion, respectively.
Recent Accounting Pronouncements Not Yet Adopted	Recent Accounting Pronouncements Not Yet Adopted Revenue from Contracts with Customers. Revenue from Contracts with Customers

Investments (Tables)

Investments (Tables)	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Summary of Carrying Value of Total Investments	A summary of the carrying value of total investments is as follows: (in millions) June 30, 2015 December 31, Available-for-sale investments $35 $201 Held-to-maturity investments 100 79 Trading investments: Consolidated sponsored investment funds 576 443 Other equity and debt securities 17 29 Deferred compensation plan mutual funds 67 64 Total trading investments 660 536 Other investments: Consolidated sponsored investment funds - 270 Equity method investments 501 633 Deferred compensation plan equity method investments 17 21 Cost method investments (1) 96 96 Carried interest 27 85 Total other investments 641 1,105 Total investments $1,436 $1,921 (1) Amounts primarily include Federal Reserve Bank (“FRB”) Stock.
Summary of Cost and Carrying Value of Investments Classified as Available-for-Sale Investments	A summary of the cost and carrying value of investments classified as available-for-sale investments is as follows: (in millions) Gross Unrealized Carrying June 30, 2015 Cost Gains Losses Equity securities of sponsored investment funds $35 $2 ($2) $35 December 31, 2014 Equity securities of sponsored investment funds $205 $5 ($9) $201
Summary of Cost and Carrying Value of Trading Investments	A summary of the cost and carrying value of trading investments is as follows: (in millions) June 30, 2015 December 31, 2014 Cost Carrying Cost Carrying Trading investments: Deferred compensation plan mutual funds $48 $67 $48 $64 Equity securities/multi-asset mutual funds 156 156 210 239 Debt securities/fixed income mutual funds: Corporate debt 227 226 109 110 Government debt 167 169 100 103 Asset/mortgage backed debt 42 42 20 20 Total trading investments $640 $660 $487 $536
Summary of Cost and Carrying Value of Other Investments	A summary of the cost and carrying value of other investments is as follows: (in millions) June 30, 2015 December 31, 2014 Cost Carrying Cost Carrying Other investments: Consolidated sponsored investment funds accounted for as VREs $- $- $268 $270 Equity method investments 399 501 518 633 Deferred compensation plan equity method investments 16 17 21 21 Cost method investments: Federal Reserve Bank stock 93 93 92 92 Other 3 3 4 4 Total cost method investments 96 96 96 96 Carried interest (1) - 27 - 85 Total other investments $511 $641 $903 $1,105 (1) Carried interest related to VREs.

Consolidated Voting Rights En32

Consolidated Voting Rights Entities (Tables)	6 Months Ended
	Jun. 30, 2015
Text Block [Abstract]
Consolidated VREs Included in Condensed Consolidated Statements of Financial Condition	The following table presents the balances related to these consolidated VREs that were recorded on the condensed consolidated statements of financial condition, including BlackRock’s net interest in these funds: (in millions) June 30, December 31, Cash and cash equivalents $120 $120 Investments: Trading investments 576 443 Other investments - 270 Other assets 35 20 Other liabilities (79 ) (18 ) Noncontrolling interests (97 ) (139 ) BlackRock’s net interests in consolidated VREs $555 $696

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	6 Months Ended
	Jun. 30, 2015
Variable Interest Entity, Primary Beneficiary [Member]
Schedule of VIE Assets and Liabilities	Consolidated VIE assets and liabilities are presented after intercompany eliminations at June 30, 2015 and December 31, 2014 in the following table: (in millions) June 30, 2015 December 31, 2014 Assets of consolidated VIEs: Cash and cash equivalents $64 $278 Investments 901 3,320 Other assets 40 32 Total investments and other assets 941 3,352 Liabilities of consolidated VIEs: Borrowings - (3,389 ) Other liabilities (192 ) (245 ) Appropriated retained earnings - 19 Noncontrolling interests of consolidated VIEs (257 ) (15 ) Total BlackRock net interests in consolidated VIEs $556 $-
Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of VIE Assets and Liabilities	At June 30, 2015 and December 31, 2014, the Company’s carrying value of assets and liabilities pertaining to its variable interests in VIEs and its maximum risk of loss related to VIEs for which it held a variable interest, but for which it was not the PB, was as follows: (in millions) Variable Interests on the Condensed Consolidated Maximum (1) At June 30, 2015 Investments Advisory Other Net Assets (Liabilities) Sponsored investment products $51 $5 ($6) $73 At December 31, 2014 CDOs/CLOs $- $2 ($5) $19 Other sponsored investment funds: Collective trusts - 191 - 191 Other 57 177 (3) 234 Total $57 $370 ($8) $444 (1) At both June 30, 2015 and December 31, 2014, BlackRock’s maximum risk of loss associated with these VIEs primarily related to collecting advisory fee receivables and BlackRock’s investments.

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis, investments measured at NAV and other assets not held at fair value June 30, 2015 (in millions) Quoted Active Markets for (Level 1) Significant Other Significant Investments (1) Other Assets (2) June 30, 2015 Assets: Investments Available-for-sale: Equity securities of sponsored investment funds $ 33 $ 2 $ - $ - $ - $ 35 Held-to-maturity debt securities - - - - 100 100 Trading: Deferred compensation plan mutual funds 67 - - - - 67 Equity/Multi-asset mutual funds 156 - - - - 156 Debt securities / fixed income mutual funds 1 436 - - - 437 Total trading 224 436 - - - 660 Other investments: Equity method: Equity and fixed income mutual funds 135 - - - - 135 Other - - - 358 8 366 Total equity method 135 - - 358 8 501 Deferred compensation plan equity method investments - - - 17 - 17 Cost method investments - - - - 96 96 Carried interest - - - - 27 27 Total investments 392 438 - 375 231 1,436 Separate account assets 116,340 45,767 - - 804 162,911 Separate account collateral held under securities lending agreements: Equity securities 28,664 - - - - 28,664 Debt securities - 3,773 - - - 3,773 Total separate account collateral held under securities lending agreements 28,664 3,773 - - - 32,437 Assets of consolidated VIEs: Private / public equity (3) 10 7 166 164 - 347 Equity securities 178 - - - - 178 Debt securities - 173 - - - 173 Other - - - 91 - 91 Carried interest - - - - 112 112 Total assets of consolidated VIEs 188 180 166 255 112 901 Total $ 145,584 $ 50,158 $ 166 $ 630 $ 1,147 $ 197,685 Liabilities: Separate account collateral liabilities under securities lending agreements $ 28,664 $ 3,773 $ - $ - $ - $ 32,437 Other liabilities (4) - 6 56 - - 62 Total $ 28,664 $ 3,779 $ 56 $ - $ - $ 32,499 (1) Amounts are comprised of certain investments measured at fair value using NAV (or its equivalent) as a practical expedient. These investments in accordance with current accounting guidance have not been classified in the fair value hierarchy (see Note 2, Significant Accounting Policies (2) Amounts are comprised of investments held at cost or amortized cost, carried interest and certain equity method investments, which include sponsored investment funds and other assets, which are not accounted for under a fair value measure. In accordance with GAAP, certain equity method investees do not account for both their financial assets and liabilities under fair value measures; therefore, the Company’s investment in such equity method investees may not represent fair value. (3) Level 3 amounts include $166 million of direct investments in private equity companies held by private equity funds. (4) Amounts include a derivative (see Note 7, Derivatives and Hedging Commitments and Contingencies Assets and liabilities measured at fair value on a recurring basis, investments measured at NAV and other assets not held at fair value December 31, 2014 (in millions) Quoted Active Markets for (Level 1) Significant Other Significant Investments (1) Other Assets (2) December 31, 2014 Assets: Investments Available-for-sale: Equity securities of sponsored investment funds $ 198 $ 3 $ - $ - $ - $ 201 Held-to-maturity debt securities - - - - 79 79 Trading: Deferred compensation plan mutual funds 64 - - - - 64 Equity/Multi-asset mutual funds 239 - - - - 239 Debt securities / fixed income mutual funds 11 222 - - - 233 Total trading 314 222 - - - 536 Other investments: Consolidated sponsored investment funds private / public equity (3) 11 11 80 168 - 270 Equity method: Fixed income mutual funds 29 - - - - 29 Other 98 - - 493 13 604 Total equity method 127 - - 493 13 633 Deferred compensation plan equity method investments - - - 21 - 21 Cost method investments - - - - 96 96 Carried interest - - - - 85 85 Total investments 650 236 80 682 273 1,921 Separate account assets 113,566 46,866 - - 855 161,287 Separate account collateral held under securities lending agreements: Equity securities 30,387 - - - - 30,387 Debt securities - 3,267 - - - 3,267 Total separate account collateral held under securities lending agreements 30,387 3,267 - - - 33,654 Assets of consolidated VIEs: Bank loans and other assets - 2,958 302 - 32 3,292 Bonds - 29 18 - - 47 Private / public equity - 3 - 10 - 13 Total assets of consolidated VIEs - 2,990 320 10 32 3,352 Total $ 144,603 $ 53,359 $ 400 $ 692 $ 1,160 $ 200,214 Liabilities: Borrowings of consolidated VIEs $ - $ - $ 3,389 $ - $ - $ 3,389 Separate account collateral liabilities under securities lending agreements 30,387 3,267 - - - 33,654 Other liabilities (4) - 5 39 - - 44 Total $ 30,387 $ 3,272 $ 3,428 $ - $ - $ 37,087 (1) Amounts are comprised of certain investments measured at fair value using NAV (or its equivalent) as a practical expedient. These investments in accordance with current accounting guidance have not been classified in the fair value hierarchy (see Note 2, Significant Accounting Policies (2) Amounts are comprised of investments held at cost or amortized cost, carried interest and certain equity method investments, which include sponsored investment funds and other assets, which are not accounted for under a fair value measure. In accordance with GAAP, certain equity method investees do not account for both their financial assets and liabilities under fair value measures; therefore, the Company’s investment in such equity method investees may not represent fair value. (3) Level 3 amounts include $80 million of direct investments in private equity companies held by private equity funds. (4) Amounts include a derivative (see Note 7, Derivatives and Hedging Commitments and Contingencies
Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis	Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis for the Three Months Ended June 30, 2015 (1) (in millions) March 31, (2) Realized Purchases Sales and Issuances and Transfers Transfers June 30, Total net (3) Assets: Assets of consolidated VIEs: Private equity $149 $8 $9 $- $- $- $- $166 $8 Liabilities: Other liabilities $51 ($5 ) $- $- $- $- $- $56 - (1) Upon adoption of ASU 2015-07, investments measured at NAV are no longer required to be categorized within the fair value hierarchy. See Note 2, Significant Accounting Policies (2) Amounts reflect the adoption of ASU 2015-02. See Note 2, Significant Accounting Policies (3) Earnings attributable to the change in unrealized gains (losses) relating to assets still held at the reporting date. Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis for the Six Months Ended June 30, 2015 (1) (in millions) December 31, Realized Purchases Sales and Issuances and (2)(3) Transfers Transfers June 30, Total net (4) Assets: Investments: Consolidated sponsored investment funds- Private equity $80 $- $- $- ($80 ) $- $- $- $ - Assets of consolidated VIEs: Private equity - 7 79 - 80 - - 166 7 Bank loans 302 - - - (302 ) - - - - Bonds 18 - - - (18 ) - - - - Total Level 3 assets of consolidated VIEs 320 7 79 - (240 ) - - 166 7 Total Level 3 assets $400 $7 $79 $- ($320 ) $- $- $166 $ 7 Liabilities: Borrowings of consolidated VIEs $3,389 $- $- $- ($3,389 ) $- $- $- - Other liabilities 39 (3 ) - - 14 - - 56 - Total Level 3 liabilities $3,428 ($3 ) $- $- ($3,375 ) $- $- $56 - (1) Upon adoption of ASU 2015-07, investments measured at NAV are no longer required to be categorized within the fair value hierarchy. See Note 2, Significant Accounting Policies (2) Amounts include the consolidation (deconsolidation) of VIEs due to the adoption of ASU 2015-02 effective January 1, 2015. (3) Amounts include a contingent liability related to an acquisition. (4) Earnings attributable to the change in unrealized gains (losses) relating to assets still held at the reporting date. Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis for the Three Months Ended June 30, 2014 (1) (in millions) March 31, Realized Purchases Sales and Issuances and (2) Transfers Transfers June 30, Total net (3) Assets: Investments Consolidated sponsored investment funds: Hedge funds $3 ($2 ) $- $- $- $- $- $1 $- Private equity 64 2 13 - - - - 79 - Assets of consolidated VIEs: Bank loans 147 - 76 (30 ) - 36 (76 ) 153 Bonds 28 - - (3 ) - - - 25 Total Level 3 assets of consolidated VIEs 175 - 76 (33 ) - 36 (76 ) 178 N/A (4) Total Level 3 assets $242 $- $ 89 ($ 33 ) $- $ 36 ($ 76 ) $258 Liabilities: Borrowings of consolidated VIEs $2,244 $9 $- $- $464 $- $- $2,699 N/A (4) Other liabilities 42 (1 ) - - - - - 43 - Total Level 3 liabilities $2,286 $8 $- $- $464 $- $- $2,742 N/A – not applicable (1) Upon adoption of ASU 2015-07, investments measured at NAV are no longer required to be categorized within the fair value hierarchy. See Note 2, Significant Accounting Policies (2) Amount includes net proceeds from borrowings of consolidated VIEs. (3) Earnings attributable to the change in unrealized gains (losses) relating to assets still held at the reporting date. (4) The net gain (loss) on consolidated VIEs is solely attributable to noncontrolling interests on the condensed consolidated statements of income. Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis for the Six Months Ended June 30, 2014 (1) (in millions) December 31, Realized Purchases Sales and Issuances and (2) Transfers (3) Transfers June 30, Total net (4) Assets: Investments Consolidated sponsored investment funds: Hedge funds $2 ($1 ) $- $- $- $- $- $1 $- Private equity 28 1 13 - - 37 - 79 $- Assets of consolidated VIEs: Bank loans 129 - 92 (43 ) - 109 (134 ) 153 Bonds 35 - - (10 ) - - - 25 Total Level 3 assets of consolidated VIEs 164 - 92 (53 ) - 109 (134 ) 178 N/A (5) Total Level 3 assets $194 $- $105 ($ 53 ) $- $146 ($134 ) $258 Liabilities: Borrowings of consolidated VIEs $2,369 $14 $- $- $ 344 $- $- $ 2,699 N/A (5) Other liabilities 42 (1 ) - - - - - 43 - Total Level 3 liabilities $ 2,411 $13 $- $- $ 344 $- $- $ 2,742 N/A – not applicable (1) Upon adoption of ASU 2015-07, investments measured at NAV are no longer required to be categorized within the fair value hierarchy. See Note 2, Significant Accounting Policies (2) Amount primarily includes net proceeds from borrowings of consolidated VIEs. (3) Includes investments previously held at cost. (4) Earnings attributable to the change in unrealized gains (losses) relating to assets still held at the reporting date. (5) The net gain (loss) on consolidated VIEs is solely attributable to noncontrolling interests on the condensed consolidated statements of income.
Fair Value of Financial Assets and Financial Liabilities	Disclosures of Fair Value for Financial Instruments Not Held at Fair Value June 30, 2015 December 31, 2014 (in millions) Carrying Estimated Carrying Estimated Fair Value Hierarchy Financial Assets: Cash and cash equivalents $ 4,907 $ 4,907 $ 5,723 $ 5,723 Level 1 (1) (2) Accounts receivable 2,347 2,347 2,120 2,120 Level 1 (3) Cash and cash equivalents of consolidated VIEs 64 64 278 278 Level 1 (1) Financial Liabilities: Accounts payable and accrued liabilities 1,284 1,284 1,035 1,035 Level 1 (3) Long-term borrowings 4,947 5,219 4,922 5,309 Level 2 (4) (1) Cash and cash equivalents are carried at either cost or amortized cost, which approximates fair value due to their short-term maturities. (2) At June 30, 2015 and December 31, 2014, approximately $129 million and $100 million, respectively, of money market funds were recorded within cash and cash equivalents on the condensed consolidated statements of financial condition. Money market funds are valued based on quoted market prices, or $1.00 per share, which generally is the NAV of the fund. (3) The carrying amounts of accounts receivable, accounts payable and accrued liabilities approximate fair value due to their short-term nature. (4) Long-term borrowings are recorded at amortized cost net of debt issuance costs. The fair value of the long-term borrowings, including the current portion of long-term borrowings, is estimated using market prices at the end of June 2015 and December 2014, respectively. See Note 10, Borrowings
Investments in Certain Entities that Calculate Net Asset Value per Share	The following tables list information regarding all investments that use a fair value measurement to account for both their financial assets and financial liabilities in their calculation of a NAV per share (or equivalent). June 30, 2015 (in millions) Ref Fair Value Total Redemption Frequency Redemption Equity method: (1) Hedge funds/funds of hedge funds (b ) $180 $ 93 Daily/Monthly (28%) Quarterly (36%) N/R (36%) 1 – 90 days Private equity funds (c ) 93 66 N/R N/R Real estate funds (d ) 85 20 Quarterly (26%) N/R (74%) 60 days Deferred compensation plan investments (e ) 17 6 N/R N/R Consolidated VIEs: Private equity funds of funds (a ) 164 17 N/R N/R Hedge fund (b ) 91 - Quarterly 90 days Total $630 $ 202 December 31, 2014 (in millions) Ref Fair Value Total Redemption Frequency Redemption Consolidated VREs: Private equity funds of funds (a ) $168 $22 N/R N/R Equity method: (1) Hedge funds/funds of hedge funds (b ) 277 39 Daily/Monthly (29%) Quarterly (48%) N/R (23%) 1 – 90 days Private equity funds (c ) 107 61 N/R N/R Real estate funds (d ) 109 1 Quarterly (19%) N/R (81%) 60 days Deferred compensation plan investments (e ) 21 5 N/R N/R Consolidated VIEs: Private equity fund (f ) 10 1 N/R N/R Total $692 $ 129 N/R – not redeemable (1) Comprised of equity method investments, which include investment companies, which account for their financial assets and most financial liabilities under fair value measures; therefore, the Company’s investment in such equity method investees approximates fair value. (a) This category includes the underlying third-party private equity funds within consolidated BlackRock sponsored private equity funds of funds. The fair values of the investments in the third-party funds have been estimated using capital accounts representing the Company’s ownership interest in each fund in the portfolio as well as other performance inputs. These investments are not subject to redemption; however, for certain funds, the Company may sell or transfer its interest, which may need approval by the general partner of the underlying funds. Due to the nature of the investments in this category, the Company reduces its investment by distributions that are received through the realization of the underlying assets of the funds. It is estimated that the underlying assets of these funds will be liquidated over a weighted-average period of approximately six years and seven years at June 30, 2015 and December 31, 2014. The total remaining unfunded commitments to other third-party funds were $18 million at June 30, 2015 and $22 million at December 31, 2014. The Company had contractual obligations to the consolidated funds of $31 million at both June 30, 2015 and December 31, 2014. (b) This category includes hedge funds and funds of hedge funds that invest primarily in equities, fixed income securities, distressed credit, opportunistic and mortgage instruments and other third-party hedge funds. The fair values of the investments have been estimated using the NAV of the Company’s ownership interest in partners’ capital. It was estimated that the investments in the funds that are not subject to redemption will be liquidated over a weighted-average period of approximately two years at both June 30, 2015 and December 31, 2014. (c) This category includes several private equity funds that initially invest in nonmarketable securities of private companies, which ultimately may become public in the future. The fair values of these investments have been estimated using capital accounts representing the Company’s ownership interest in the funds as well as other performance inputs. The Company’s investment in each fund is not subject to redemption and is normally returned through distributions as a result of the liquidation of the underlying assets of the private equity funds. It was estimated that the investments in these funds will be liquidated over a weighted-average period of approximately four years at both June 30, 2015 and December 31, 2014. (d) This category includes several real estate funds that invest directly in real estate and real estate related assets. The fair values of the investments have been estimated using capital accounts representing the Company’s ownership interest in the funds. A majority of the Company’s investments are not subject to redemption or are not currently redeemable and are normally returned through distributions as a result of the liquidation of the underlying assets of the real estate funds. It is estimated that the investments in these funds not subject to redemptions will be liquidated over a weighted-average period of approximately five years and seven years at June 30, 2015 and December 31, 2014, respectively. (e) This category includes investments in several real estate funds. The fair values of the investments in this category have been estimated using capital accounts representing the Company’s ownership interest in partners’ capital as well as performance inputs. The investments are not subject to redemption; however, distributions as a result of the liquidation of the underlying assets will be used to settle certain deferred compensation liabilities over time. (f) This category includes the underlying third-party private equity funds within one consolidated BlackRock sponsored private equity fund of funds. The fair values of the investments in the third-party funds have been estimated using capital accounts representing the Company’s ownership interest in each fund in the portfolio as well as other performance inputs. These investments are not subject to redemption; however, for certain funds the Company may sell or transfer its interest, which may need approval by the general partner of the underlying third-party funds. Due to the nature of the investments in this category, the Company reduces its investment by distributions that are received through the realization of the underlying assets of the funds. It is estimated that the underlying assets of these funds will be liquidated over a weighted-average period of approximately one year at December 31, 2014. Total remaining unfunded commitments to other third-party funds were not material at December 31, 2014, which commitments are required to be funded by capital contributions from noncontrolling interest holders.
Summary of Information Related to those Assets and Liabilities for which Fair Value Option was Elected	The following table summarizes information at December 31, 2014 related to those assets and liabilities for which the fair value option was elected: (in millions) December 31, 2014 CLO Bank Loans: Aggregate principal amounts outstanding $3,338 Fair value 3,260 Aggregate unpaid principal balance in excess of (less than) fair value $78 Unpaid principal balance of loans more than 90 days past due $6 Aggregate fair value of loans more than 90 days past due 2 Aggregate unpaid principal balance in excess of fair value for loans more than 90 days past due $4 CLO Borrowings: Aggregate principal amounts outstanding $3,508 Fair value $3,389

Goodwill (Tables)

Goodwill (Tables)	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill Activity	Goodwill activity during the six months ended June 30, 2015 was as follows: (in millions) December 31, 2014 $12,961 BKCA acquisition 19 Goodwill adjustment related to Quellos (1) (10 ) June 30, 2015 $12,970 (1) The $10 million decrease in goodwill during the six months ended June 30, 2015 resulted from tax benefits realized from tax-deductible goodwill in excess of book goodwill from the acquisition of the fund-of-funds business of Quellos Group, LLC in October 2007 (the “Quellos Transaction”). Goodwill related to the Quellos Transaction will continue to be reduced in future periods by the amount of tax benefits realized from tax-deductible goodwill in excess of book goodwill from the Quellos Transaction. The balance of the Quellos tax-deductible goodwill in excess of book goodwill was approximately $247 million and $263 million at June 30, 2015 and December 31, 2014, respectively.

Intangible Assets (Tables)

Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying Amounts of Identifiable Intangible Assets	The carrying amounts of identifiable intangible assets are summarized as follows: (in millions) Indefinite-lived Finite-lived Total December 31, 2014 $16,988 $356 $17,344 Amortization expense - (70 ) (70 ) BKCA acquisition 120 - 120 June 30, 2015 $17,108 $286 $17,394

Borrowings (Tables)

Borrowings (Tables)	6 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Carrying Value and Fair Value of Long-Term Borrowings	The carrying value and fair value of long-term borrowings estimated using market prices at June 30, 2015 included the following: (in millions) Maturity Amount Unamortized and Debt Carrying Value Fair Value 6.25% Notes due 2017 $700 ($2) $698 $775 5.00% Notes due 2019 1,000 (4) 996 1,118 4.25% Notes due 2021 750 (5) 745 821 3.375% Notes due 2022 750 (6) 744 773 3.50% Notes due 2024 1,000 (8) 992 1,007 1.25% Notes due 2025 780 (8) 772 725 Total Long-term Borrowings $4,980 ($33) $4,947 $5,219

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2015
Restricted Stock and RSU Activity	Restricted stock and restricted stock units (“RSUs”) activity for the six months ended June 30, 2015 is summarized below: Outstanding at Restricted Weighted- December 31, 2014 3,401,909 $257.01 Granted 1,290,014 $344.36 Converted (1,566,979 ) $228.78 Forfeited (26,091 ) $300.08 June 30, 2015 (1) 3,098,853 $307.28 (1) At June 30, 2015, approximately 2.9 million awards are expected to vest and 0.2 million awards have vested but have not been converted.
Stock Option Activity	Stock Options. Outstanding at Shares Weighted December 31, 2014 (1) 906,719 $ 167.76 Exercised (1) (42,116 ) $ 167.76 June 30, 2015 (1) 864,603 $ 167.76 (1) The aggregate intrinsic value of options exercised during the six months ended June 30, 2015 was $8.2 million. At June 30, 2015, all options were vested.
Performance-Based RSUs [Member]
Restricted Stock and RSU Activity	Performance-based RSU activity for the six months ended June 30, 2015 is summarized below: Outstanding at Performance- Weighted- December 31, 2014 - $- Granted 262,847 $343.86 June 30, 2015 (1) 262,847 $ 343.86 (1) At June 30, 2015, approximately 0.3 million awards are expected to vest and an immaterial amount of awards have vested but have not been converted.

Accumulated Other Comprehensi39

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income	The following table presents changes in AOCI by component for the three and six months ended June 30, 2015 and 2014: (in millions) Unrealized gains available-for-sale (1) Benefit plans Foreign (2) Total For the Three Months Ended June 30, 2015 March 31, 2015 $ 2 $ 3 ($ 444 ) ($ 439 ) Other comprehensive income (loss) before reclassifications (1 ) - 101 100 Amount reclassified from AOCI - - - - Net other comprehensive income (loss) for the three months ended June 30, 2015 (1 ) - 101 100 June 30, 2015 $ 1 $ 3 ($ 343 ) ($ 339 ) For the Six Months Ended June 30, 2015 December 31, 2014 $ 2 $ 4 ($ 279 ) ($ 273 ) Other comprehensive income (loss) before reclassifications (1 ) (1 ) (64 ) (66 ) Amount reclassified from AOCI - - - - Net other comprehensive income (loss) for the six months ended June 30, 2015 (1 ) (1 ) (64 ) (66 ) June 30, 2015 $ 1 $ 3 ($ 343 ) ($ 339 ) (1) All amounts are net of tax. (2) Amounts in the three and six months ended June 30, 2015 include a gain from the Company’s net investment hedge of $7 million, net of tax of $4 million. (in millions) Unrealized gains available-for-sale (1) Benefit plans Foreign Total For the Three Months Ended June 30, 2014 March 31, 2014 ($ 1 ) $ 6 ($ 40 ) ($ 35 ) Other comprehensive income (loss) before reclassifications 4 - 30 34 Amount reclassified from AOCI (2),(3) 2 - - 2 Net other comprehensive income (loss) for the three months ended June 30, 2014 6 - 30 36 June 30, 2014 $ 5 $ 6 ($ 10 ) $ 1 For the Six Months Ended June 30, 2014 December 31, 2013 $ 7 $ 6 ($ 48 ) ($ 35 ) Other comprehensive income (loss) before reclassifications 4 - 38 42 Amount reclassified from AOCI (2),(3) (6 ) - - (6 ) Net other comprehensive income (loss) for the six months ended June 30, 2014 (2 ) - 38 36 June 30, 2014 $ 5 $ 6 ($ 10 ) $ 1 (1) All amounts are net of tax. (2) The tax benefit (expense) was not material for the three and six months ended June 30, 2014. (3) The pre-tax amount reclassified from AOCI was included in net gain (loss) on investments on the condensed consolidated statements of income.

Capital Stock (Tables)

Capital Stock (Tables)	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Preferred Shares Authorized, Issued and Outstanding	Nonvoting Participating Preferred Stock June 30, 2015 December 31, Series A Shares authorized, $0.01 par value 20,000,000 20,000,000 Shares issued and outstanding - - Series B Shares authorized, $0.01 par value 150,000,000 150,000,000 Shares issued and outstanding (1) 823,188 823,188 Series C Shares authorized, $0.01 par value 6,000,000 6,000,000 Shares issued and outstanding (1) 1,311,887 1,311,887 Series D Shares authorized, $0.01 par value 20,000,000 20,000,000 Shares issued and outstanding - - (1) Shares held by PNC.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Computation of Basic and Diluted EPS under Treasury Stock Method	The following table sets forth the computation of basic and diluted EPS for the three and six months ended June 30, 2015 and 2014 under the treasury stock method: Three Months Ended June 30, Six Months Ended June 30, (in millions, except shares and per share 2015 2014 2015 2014 Net income attributable to BlackRock $819 $808 $1,641 $1,564 Basic weighted-average shares outstanding 166,616,558 168,712,221 166,851,492 168,895,801 Dilutive effect of nonparticipating RSUs and stock options 2,498,201 2,437,932 2,567,472 2,644,217 Total diluted weighted-average shares outstanding 169,114,759 171,150,153 169,418,964 171,540,018 Basic earnings per share $4.92 $4.79 $9.84 $9.26 Diluted earnings per share $4.84 $4.72 $9.69 $9.12

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Schedule of Investment Advisory, Administration Fees, Securities Lending Revenue and Performance Fees, BlackRock Solutions and Advisory Revenue, Distribution Fees and Other Revenue	The following table illustrates investment advisory, administration fees, securities lending revenue and performance fees, BlackRock Solutions Three Months Ended Six Months Ended (in millions) 2015 2014 2015 2014 Equity $ 1,426 $ 1,369 $ 2,732 $ 2,646 Fixed income 600 544 1,175 1,047 Multi-asset 324 310 636 599 Alternatives 244 253 476 559 Cash management 76 73 149 147 Total investment advisory, administration fees, securities lending revenue and performance fees 2,670 2,549 5,168 4,998 BlackRock Solutions 161 146 308 300 Distribution fees 13 18 30 37 Other revenue 61 65 122 113 Total revenue $ 2,905 $ 2,778 $ 5,628 $ 5,448
Total Revenue by Geographic Region	The following table illustrates total revenue for the three and six months ended June 30, 2015 and 2014 by geographic region. These amounts are aggregated on a legal entity basis and do not necessarily reflect where the customer resides. (in millions) Three Months Ended Six Months Ended June 30, Revenue 2015 2014 2015 2014 Americas $ 1,913 $ 1,764 $ 3,766 $ 3,546 Europe 847 882 1,588 1,639 Asia-Pacific 145 132 274 263 Total revenue $ 2,905 $ 2,778 $ 5,628 $ 5,448
Schedule of Long-Lived Assets by Geographic Region	The following table illustrates long-lived assets that consist of goodwill and property and equipment at June 30, 2015 and December 31, 2014 by geographic region. These amounts are aggregated on a legal entity basis and do not necessarily reflect where the asset is physically located. (in millions) June 30, December 31, Long-lived Assets Americas $ 13,232 $ 13,151 Europe 194 194 Asia-Pacific 89 83 Total long-lived assets $ 13,515 $ 13,428

Business Overview - Additional

Business Overview - Additional Information (Detail) - PNC [Member]	Jun. 30, 2015
Related Party Transaction [Line Items]
Percentage of common stock of parent owned	21.00%
Percentage of capital stock of parent owned	22.00%

Significant Accounting Polici44

Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Significant Accounting Policies [Line Items]
Assets	$ 237,008	$ 237,008	$ 239,792
Liabilities	208,878	208,878	212,272
Deconsolidation in elimination of retained loss		19
Reduction of management fees	37	$ 80
Percentage of Yield Support waivers offset		45.00%
Fair value of loaned securities	29,600	$ 29,600	30,600
Fair value of collateral held for loan securities	32,437	32,437	33,654
Investments Measured At NAV [Member]
Significant Accounting Policies [Line Items]
Assets fair value	630	630	$ 692
CLO Bank Loans [Member] | Deconsolidation [Member]
Significant Accounting Policies [Line Items]
Assets	3,600	3,600
Liabilities	$ 3,600	$ 3,600
Minimum [Member]
Significant Accounting Policies [Line Items]
Percentage of equity method treatment		50.00%
Collateral cash and securities received in exchange of value of securities lent in order to reduce counterparty risk	102.00%	102.00%
Maximum [Member]
Significant Accounting Policies [Line Items]
Collateral cash and securities received in exchange of value of securities lent in order to reduce counterparty risk	112.00%	112.00%

Investments - Summary of Carryi

Investments - Summary of Carrying Value of Total Investments (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Investment [Line Items]
Available-for-sale investments	$ 35	$ 201
Held-to-maturity investments	100	79
Total trading investments	660	536
Consolidated sponsored investment funds	0	270
Equity method investments	501	633
Cost method investments	96	96
Carried interest	27	85
Total other investments	641	1,105
Total investments	1,436	1,921
Consolidated Sponsored Investment Funds [Member]
Investment [Line Items]
Total trading investments	576	443
Other Equity and Debt Securities [Member]
Investment [Line Items]
Total trading investments	17	29
Deferred Compensation Plan Fund [Member]
Investment [Line Items]
Total trading investments	67	64
Equity method investments	17	21
Total other investments	$ 17	$ 21

Investments - Additional Inform

Investments - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Investment [Line Items]
Total investments	$ 1,436	$ 1,921
Total trading investments	660	536
Other investments	641	1,105
Foreign government debt	100	79
Foreign government debt, within one year	$ 86
Maturity period of investments	1 year
Foreign government debt, after five years through ten years	$ 14
Consolidated Voting Rights Entities [Member]
Investment [Line Items]
Total investments	576	713
Total trading investments	576	443
Other investments	0	270
Foreign government debt	$ 100	79
Minimum [Member]
Investment [Line Items]
Maturity period of investments	5 years
Maximum [Member]
Investment [Line Items]
Maturity period of investments	10 years
Consolidated Sponsored Investment Funds [Member]
Investment [Line Items]
Total trading investments	$ 576	443
Consolidated Sponsored Investment Funds [Member] | Consolidated Voting Rights Entities [Member]
Investment [Line Items]
Other investments	0	270
Trading securities, equity	140	220
Trading securities, debt	436	223
Deferred Compensation Plan Fund [Member]
Investment [Line Items]
Total trading investments	67	64
Other investments	17	21
Equity and Debt Securities Held in Separate Investment Accounts [Member]
Investment [Line Items]
Total trading investments	$ 17	$ 29
PennyMac [Member]
Investment [Line Items]
Ownership percentage	20.00%	20.00%
Shares and units	16	16
Carrying value - equity method investment	$ 191	$ 167
Fair value of equity method investments	$ 282	$ 269

Investments - Summary of Cost a

Investments - Summary of Cost and Carrying Value of Investments Classified as Available-for-Sale Investments (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Available-for-sale investments, Carrying Value	$ 35	$ 201
Equity Securities of Sponsored Investment Funds [Member]
Schedule of Investments [Line Items]
Available-for-sale investments, Cost	35	205
Available-for-sale investments, Gross Unrealized Gains	2	5
Available-for-sale investments, Gross Unrealized Losses	(2)	(9)
Available-for-sale investments, Carrying Value	$ 35	$ 201

Investments - Summary of Cost48

Investments - Summary of Cost and Carrying Value of Trading Investments (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Trading investments, Cost	$ 640	$ 487
Trading investments, Carrying Value	660	536
Deferred Compensation Plan Fund [Member]
Schedule of Investments [Line Items]
Trading investments, Cost	48	48
Trading investments, Carrying Value	67	64
Equity Securities/Multi-Asset Mutual Funds [Member]
Schedule of Investments [Line Items]
Trading investments, Cost	156	210
Trading investments, Carrying Value	156	239
Corporate Debt [Member]
Schedule of Investments [Line Items]
Trading investments, Cost	227	109
Trading investments, Carrying Value	226	110
Government Debt [Member]
Schedule of Investments [Line Items]
Trading investments, Cost	167	100
Trading investments, Carrying Value	169	103
Asset/Mortgage Backed Debt [Member]
Schedule of Investments [Line Items]
Trading investments, Cost	42	20
Trading investments, Carrying Value	$ 42	$ 20

Investments - Summary of Cost49

Investments - Summary of Cost and Carrying Value of Other Investments (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Total Other Investments, Cost	$ 511	$ 903
Total Other Investments, Carrying Value	641	1,105
Consolidated Voting Rights Entities [Member]
Schedule of Investments [Line Items]
Total Other Investments, Carrying Value	0	270
Consolidated Sponsored Investment Funds [Member] | Consolidated Voting Rights Entities [Member]
Schedule of Investments [Line Items]
Total Other Investments, Cost	0	268
Total Other Investments, Carrying Value	0	270
Equity Method Investments [Member]
Schedule of Investments [Line Items]
Total Other Investments, Cost	399	518
Total Other Investments, Carrying Value	501	633
Deferred Compensation Plan Fund [Member]
Schedule of Investments [Line Items]
Total Other Investments, Cost	16	21
Total Other Investments, Carrying Value	17	21
Federal Reserve Bank Stock [Member]
Schedule of Investments [Line Items]
Total Other Investments, Cost	93	92
Total Other Investments, Carrying Value	93	92
Other [Member]
Schedule of Investments [Line Items]
Total Other Investments, Cost	3	4
Total Other Investments, Carrying Value	3	4
Total Cost Method Investments [Member]
Schedule of Investments [Line Items]
Total Other Investments, Cost	96	96
Total Other Investments, Carrying Value	96	96
Carried Interest [Member] | Consolidated Voting Rights Entities [Member]
Schedule of Investments [Line Items]
Total Other Investments, Cost	0	0
Total Other Investments, Carrying Value	$ 27	$ 85

Consolidated VREs Recorded in C

Consolidated VREs Recorded in Condensed Consolidated Statements of Financial Condition (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Consolidated Sponsored Investment Funds [Line Items]
Cash and cash equivalents	$ 4,907	$ 5,723	$ 5,127	$ 4,390
Trading investments	660	536
Other investments	641	1,105
Other assets	1,056	685
Other liabilities	(971)	(886)
Noncontrolling interests	(96)	(119)
Consolidated Voting Rights Entities [Member]
Consolidated Sponsored Investment Funds [Line Items]
Cash and cash equivalents	120	120
Trading investments	576	443
Other investments	0	270
Other assets	35	20
Other liabilities	(79)	(18)
Noncontrolling interests	(97)	(139)
BlackRock's net interests in consolidated VREs	$ 555	$ 696

Variable Interest Entities Refl

Variable Interest Entities Reflects adoption of ASU 2015-12 - Schedule of VIE Assets and Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 4,907	$ 5,723	$ 5,127	$ 4,390
Investments	1,436	1,921
Other assets	1,056	685
Borrowings	(5,219)
Other liabilities	(971)	(886)
Noncontrolling interests of consolidated VIEs	(96)	(119)
Consolidated Entity, Variable Interest Entities VIE [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents	64	278
Investments	901	3,320
Other assets	40	32
Total investments and other assets	941	3,352
Borrowings	0	(3,389)
Other liabilities	(192)	(245)
Appropriated retained earnings	0	19
Noncontrolling interests of consolidated VIEs	(257)	(15)
Total BlackRock net interests in consolidated VIEs	$ 556	$ 0

Variable Interest Entities Re52

Variable Interest Entities Reflects adoption of ASU 2015-12 - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Variable Interest Entity [Line Items]
Income/(loss) attributable to noncontrolling interests	$ 7	$ 33	$ 10	$ 21
Income/(loss) attributable to nonredeemable noncontrolling interests	4	32	3	19
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Nonoperating income and (expense)	12	28	16	12
Income/(loss) attributable to noncontrolling interests	7		7
Income/(loss) attributable to nonredeemable noncontrolling interests		$ 28		$ 12
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Sponsored investments funds	$ 3,000		$ 3,000
Other sponsored investments funds collective trusts					$ 1,400,000
Variable Interest Entity, Not Primary Beneficiary [Member] | Minimum [Member]
Variable Interest Entity [Line Items]
Sponsored investments funds					1,700,000
Variable Interest Entity, Not Primary Beneficiary [Member] | Maximum [Member]
Variable Interest Entity [Line Items]
Sponsored investments funds					$ 1,800,000

Variable Interest Entities Re53

Variable Interest Entities Reflects adoption of ASU 2015-12 - Balances Relating to Variable Interest Entities in which BlackRock is Not Primary Beneficiary (Detail) - Variable Interest Entity, Not Primary Beneficiary [Member] - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Other sponsored investment products	$ 3,000,000,000
Collective trusts		$ 1,400,000,000,000
Investments [Member]
Variable Interest Entity [Line Items]
Other sponsored investment products	51,000,000
CDOs/CLOs		0
Collective trusts		0
Other		57,000,000
Total		57,000,000
Advisory Fee Receivables [Member]
Variable Interest Entity [Line Items]
Other sponsored investment products	5,000,000
CDOs/CLOs		2,000,000
Collective trusts		191,000,000
Other		177,000,000
Total		370,000,000
Other Net Assets (Liabilities) [Member]
Variable Interest Entity [Line Items]
Other sponsored investment products	(6,000,000)
CDOs/CLOs		(5,000,000)
Collective trusts		0
Other		(3,000,000)
Total		(8,000,000)
Maximum Risk of Loss [Member]
Variable Interest Entity [Line Items]
Other sponsored investment products	$ 73,000,000
CDOs/CLOs		19,000,000
Collective trusts		191,000,000
Other		234,000,000
Total		$ 444,000,000

Fair Value Disclosures - Assets

Fair Value Disclosures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale	$ 35	$ 201
Total trading	660	536
Separate account assets	162,911	161,287
Total separate account collateral held under securities lending agreements	32,437	33,654
Borrowings of consolidated VIEs	4,947	4,922
Separate account collateral liabilities under securities lending agreements	32,437	33,654
Investments Measured At NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	630	692
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	660	536
Total equity method	501	633
Deferred compensation plan equity method investments	17	21
Cost method investments	96	96
Carried interest	27	85
Total investments	1,436	1,921
Separate account assets	162,911	161,287
Total separate account collateral held under securities lending agreements	32,437	33,654
Total	197,685	200,214
Separate account collateral liabilities under securities lending agreements	32,437	33,654
Other liabilities	62	44
Total liabilities measured at fair value	32,499	37,087
Fair Value, Measurements, Recurring [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	901	3,352
Borrowings of consolidated VIEs		3,389
Fair Value, Measurements, Recurring [Member] | Deferred Compensation Plan Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	67	64
Fair Value, Measurements, Recurring [Member] | Equity/Multi-asset Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	156	239
Fair Value, Measurements, Recurring [Member] | Debt Securities/ Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	437	233
Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total consolidated sponsored investment funds		270
Total assets of consolidated VIEs		13
Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	347
Fair Value, Measurements, Recurring [Member] | Fixed Income Mutual Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method		29
Fair Value, Measurements, Recurring [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	366	604
Fair Value, Measurements, Recurring [Member] | Other [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	91
Fair Value, Measurements, Recurring [Member] | Equity and Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	135
Fair Value, Measurements, Recurring [Member] | Bonds [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		47
Fair Value, Measurements, Recurring [Member] | Bank Loans and Other Assets [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		3,292
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Total equity method	358	493
Deferred compensation plan equity method investments	17	21
Cost method investments	0	0
Carried interest	0	0
Total investments	375	682
Separate account assets	0	0
Total separate account collateral held under securities lending agreements	0	0
Total	630	692
Separate account collateral liabilities under securities lending agreements	0	0
Other liabilities	0	0
Total liabilities measured at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	255	10
Borrowings of consolidated VIEs		0
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Deferred Compensation Plan Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Equity/Multi-asset Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Debt Securities/ Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Private/ Public Equity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total consolidated sponsored investment funds		168
Total assets of consolidated VIEs		10
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Private/ Public Equity [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	164
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Fixed Income Mutual Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method		0
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	358	493
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Other [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	91
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Equity and Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	0
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Bonds [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		0
Fair Value, Measurements, Recurring [Member] | Investments Measured At NAV [Member] | Bank Loans and Other Assets [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Total equity method	8	13
Deferred compensation plan equity method investments	0	0
Cost method investments	96	96
Carried interest	27	85
Total investments	231	273
Separate account assets	804	855
Total separate account collateral held under securities lending agreements	0	0
Total	1,147	1,160
Separate account collateral liabilities under securities lending agreements	0	0
Other liabilities	0	0
Total liabilities measured at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	112	32
Borrowings of consolidated VIEs		0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Deferred Compensation Plan Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Equity/Multi-asset Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Debt Securities/ Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Private/ Public Equity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total consolidated sponsored investment funds		0
Total assets of consolidated VIEs		0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Private/ Public Equity [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Fixed Income Mutual Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method		0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	8	13
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Other [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Equity and Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Bonds [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		0
Fair Value, Measurements, Recurring [Member] | Other Assets Not Held at Fair Value [Member] | Bank Loans and Other Assets [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		32
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale	35	201
Total separate account collateral held under securities lending agreements	28,664	30,387
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	178
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Investments Measured At NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale	0	0
Total separate account collateral held under securities lending agreements	0	0
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Investments Measured At NAV [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Other Assets Not Held at Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale	0	0
Total separate account collateral held under securities lending agreements	0	0
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Other Assets Not Held at Fair Value [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity debt securities	100	79
Total separate account collateral held under securities lending agreements	3,773	3,267
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	173
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Investments Measured At NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity debt securities	0	0
Total separate account collateral held under securities lending agreements	0	0
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Investments Measured At NAV [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Other Assets Not Held at Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity debt securities	100	79
Total separate account collateral held under securities lending agreements	0	0
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Other Assets Not Held at Fair Value [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Fair Value, Measurements, Recurring [Member] | Carried Interest [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	112
Fair Value, Measurements, Recurring [Member] | Carried Interest [Member] | Investments Measured At NAV [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Fair Value, Measurements, Recurring [Member] | Carried Interest [Member] | Other Assets Not Held at Fair Value [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	112
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	224	314
Total equity method	135	127
Deferred compensation plan equity method investments	0	0
Cost method investments	0	0
Carried interest	0	0
Total investments	392	650
Separate account assets	116,340	113,566
Total separate account collateral held under securities lending agreements	28,664	30,387
Total	145,584	144,603
Separate account collateral liabilities under securities lending agreements	28,664	30,387
Other liabilities	0	0
Total liabilities measured at fair value	28,664	30,387
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	188	0
Borrowings of consolidated VIEs		0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Deferred Compensation Plan Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	67	64
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Equity/Multi-asset Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	156	239
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities/ Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	1	11
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total consolidated sponsored investment funds		11
Total assets of consolidated VIEs		0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	10
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Fixed Income Mutual Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method		29
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	0	98
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Other [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Equity and Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	135
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Bonds [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Bank Loans and Other Assets [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale	33	198
Total separate account collateral held under securities lending agreements	28,664	30,387
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	178
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity debt securities	0	0
Total separate account collateral held under securities lending agreements	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Carried Interest [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	436	222
Total equity method	0	0
Deferred compensation plan equity method investments	0	0
Cost method investments	0	0
Carried interest	0	0
Total investments	438	236
Separate account assets	45,767	46,866
Total separate account collateral held under securities lending agreements	3,773	3,267
Total	50,158	53,359
Separate account collateral liabilities under securities lending agreements	3,773	3,267
Other liabilities	6	5
Total liabilities measured at fair value	3,779	3,272
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	180	2,990
Borrowings of consolidated VIEs		0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Deferred Compensation Plan Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Equity/Multi-asset Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities/ Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	436	222
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total consolidated sponsored investment funds		11
Total assets of consolidated VIEs		3
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	7
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Fixed Income Mutual Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method		0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	0	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Other [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Equity and Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Bonds [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		29
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Bank Loans and Other Assets [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		2,958
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale	2	3
Total separate account collateral held under securities lending agreements	0	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity debt securities	0	0
Total separate account collateral held under securities lending agreements	3,773	3,267
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	173
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Carried Interest [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments		80
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Total equity method	0	0
Deferred compensation plan equity method investments	0	0
Cost method investments	0	0
Carried interest	0	0
Total investments	0	80
Separate account assets	0	0
Total separate account collateral held under securities lending agreements	0	0
Total	166	400
Separate account collateral liabilities under securities lending agreements	0	0
Other liabilities	56	39
Total liabilities measured at fair value	56	3,428
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	166	320
Borrowings of consolidated VIEs		3,389
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Deferred Compensation Plan Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Equity/Multi-asset Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities/ Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total trading	0	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total consolidated sponsored investment funds		80
Total assets of consolidated VIEs		0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	166
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Fixed Income Mutual Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method		0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	0	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Other [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Equity and Fixed Income Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total equity method	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Bonds [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		18
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Bank Loans and Other Assets [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs		302
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale	0	0
Total separate account collateral held under securities lending agreements	0	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity debt securities	0	0
Total separate account collateral held under securities lending agreements	0	$ 0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Carried Interest [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets of consolidated VIEs	$ 0

Fair Value Disclosures - Asse55

Fair Value Disclosures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Parenthetical) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member] | Consolidated Variable Interest Entities [Member] | Direct Investments [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets of consolidated VIEs, Private / public equity	$ 166	$ 80

Fair Value Disclosures - Additi

Fair Value Disclosures - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating performance projections covering period		5 years
Proceeds from borrowings		$ 787	$ 997
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments				$ 80
Significant Unobservable Inputs (Level 3) [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		166
Assets of Consolidated VIEs, Bank Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers out of Level 3	$ 76	0	134
Transfers into Level 3	36	$ 0	109
Assets of Consolidated VIEs, Bank Loans [Member] | Bank Loans and Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers out of Level 3	76		134
Transfers into Level 3	36		109
CLO Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amounts outstanding of the borrowings, maturity year, minimum		2,016
Principal amounts outstanding of the borrowings, maturity year, maximum		2,027
Loss on fair value borrowings	13		50
CLO Bank Loans and Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on fair value assets	52		79
Consolidated CLO [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from borrowings	$ 612		$ 612

Fair Value Disclosures - Change

Fair Value Disclosures - Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Consolidated Sponsored Investment Funds, Private Equity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, beginning balance		$ 64	$ 80	$ 28
Realized and unrealized gains (losses) in earnings and OCI		2	0	1
Purchases		13	0	13
Sales and maturities		0	0	0
Issuances and other settlements		0	80	0
Transfers into Level 3		0	0	37
Transfers out of Level 3		0	0	0
Assets measured at fair value, ending balance	$ 0	79	0	79
Total net unrealized gains (losses) included in earnings		0	0	0
Consolidated VIEs, Private Equity Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, beginning balance			0
Realized and unrealized gains (losses) in earnings and OCI	8		7
Purchases	9		79
Sales and maturities	0		0
Issuances and other settlements	0		(80)
Transfers into Level 3	0		0
Transfers out of Level 3	0		0
Assets measured at fair value, ending balance	166		166
Total net unrealized gains (losses) included in earnings	8		7
Assets of Consolidated VIEs, Bank Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, beginning balance		147	302	129
Realized and unrealized gains (losses) in earnings and OCI		0	0	0
Purchases		76	0	92
Sales and maturities		(30)	0	(43)
Issuances and other settlements		0	302	0
Transfers into Level 3		36	0	109
Transfers out of Level 3		(76)	0	(134)
Assets measured at fair value, ending balance	0	153	0	153
Total net unrealized gains (losses) included in earnings			0
Assets of Consolidated VIEs, Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, beginning balance		28	18	35
Realized and unrealized gains (losses) in earnings and OCI		0	0	0
Purchases		0	0	0
Sales and maturities		(3)	0	(10)
Issuances and other settlements		0	18	0
Transfers into Level 3		0	0	0
Transfers out of Level 3		0	0	0
Assets measured at fair value, ending balance	0	25	0	25
Total net unrealized gains (losses) included in earnings			0
Total Level 3 Assets of Consolidated VIEs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, beginning balance		175	320	164
Realized and unrealized gains (losses) in earnings and OCI		0	7	0
Purchases		76	79	92
Sales and maturities		(33)	0	(53)
Issuances and other settlements		0	240	0
Transfers into Level 3		36	0	109
Transfers out of Level 3		(76)	0	(134)
Assets measured at fair value, ending balance	166	178	166	178
Total net unrealized gains (losses) included in earnings			7
Total Level 3 Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, beginning balance		242	400	194
Realized and unrealized gains (losses) in earnings and OCI		0	7	0
Purchases		89	79	105
Sales and maturities		(33)	0	(53)
Issuances and other settlements		0	320	0
Transfers into Level 3		36	0	146
Transfers out of Level 3		(76)	0	(134)
Assets measured at fair value, ending balance	166	258	166	258
Total net unrealized gains (losses) included in earnings			7
Consolidated Sponsored Investment Funds, Hedge Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, beginning balance		3		2
Realized and unrealized gains (losses) in earnings and OCI		(2)		(1)
Purchases		0		0
Sales and maturities		0		0
Issuances and other settlements		0		0
Transfers into Level 3		0		0
Transfers out of Level 3		0		0
Assets measured at fair value, ending balance		1		1
Total net unrealized gains (losses) included in earnings		0		0
Borrowings of Consolidated VIEs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value, beginning balance		2,244		2,369
Realized and unrealized gains (losses) in earnings and OCI		9	0	14
Purchases		0	0	0
Sales and maturities		0	0	0
Issuances and other settlements		464	(3,389)	344
Transfers into Level 3		0	0	0
Transfers out of Level 3		0	0	0
Liabilities measured at fair value, ending balance	0	2,699	0	2,699
Total net unrealized gains (losses) included in earnings			0
Other Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value, beginning balance	51	42		42
Realized and unrealized gains (losses) in earnings and OCI	(5)	(1)	(3)	(1)
Purchases	0	0	0	0
Sales and maturities	0	0	0	0
Issuances and other settlements	0	0	14	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Liabilities measured at fair value, ending balance	56	43	56	43
Total net unrealized gains (losses) included in earnings	0	0	0	0
Total Level 3 Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value, beginning balance		2,286		2,411
Realized and unrealized gains (losses) in earnings and OCI		8	(3)	13
Purchases		0	0	0
Sales and maturities		0	0	0
Issuances and other settlements		464	(3,375)	344
Transfers into Level 3		0	0	0
Transfers out of Level 3		0	0	0
Liabilities measured at fair value, ending balance	$ 56	$ 2,742	56	$ 2,742
Total net unrealized gains (losses) included in earnings			$ 0

Fair Value Disclosures - Fair V

Fair Value Disclosures - Fair Value of Financial Assets and Financial Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 4,907	$ 5,723	$ 5,127	$ 4,390
Long-term borrowings	4,947	4,922
Estimated Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	4,907	5,723
Accounts receivable	2,347	2,120
Cash and cash equivalents of consolidated VIEs	64	278
Accounts payable and accrued liabilities	1,284	1,035
Estimated Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term borrowings	5,219	5,309
Carrying Amount [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	4,907	5,723
Accounts receivable	2,347	2,120
Cash and cash equivalents of consolidated VIEs	64	278
Accounts payable and accrued liabilities	1,284	1,035
Carrying Amount [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term borrowings	$ 4,947	$ 4,922

Fair Value Disclosures - Fair59

Fair Value Disclosures - Fair Value of Financial Assets and Financial Liabilities (Parenthetical) (Detail) - USD ($) $ / shares in Units, $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 4,907	$ 5,723	$ 5,127	$ 4,390
Money market valuation floor	$ 1
Money Market Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 129	$ 100

Fair Value Disclosures - Invest

Fair Value Disclosures - Investments in Certain Entities Calculate Net Asset Value per Share (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 630	$ 692
Total Unfunded Commitments	202	129
Equity Method, Private Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	93	107
Total Unfunded Commitments	66	61
Equity Method, Real Estate Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	85	109
Total Unfunded Commitments	$ 20	$ 1
Redemption Frequency (Quarterly)	26.00%	19.00%
Redemption Frequency (Not Redeemable)	74.00%	81.00%
Redemption Notice Period, Not Redeemable	60 days	60 days
Equity Method, Hedge Funds/Funds of Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 180	$ 277
Total Unfunded Commitments	$ 93	$ 39
Redemption Frequency (Daily)	28.00%	29.00%
Redemption Frequency (Monthly)	28.00%	29.00%
Redemption Frequency (Quarterly)	36.00%	48.00%
Redemption Frequency (Not Redeemable)	36.00%	23.00%
Equity Method, Hedge Funds/Funds of Hedge Funds [Member] | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period, days	1 day	1 day
Equity Method, Hedge Funds/Funds of Hedge Funds [Member] | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period, days	90 days	90 days
Equity Method, Deferred Compensation Plan Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 17	$ 21
Total Unfunded Commitments	6	5
Consolidated VIEs, Private Equity Fund [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value		10
Total Unfunded Commitments		1
Consolidated VIEs, Private Equity Funds of Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	164
Total Unfunded Commitments	17
Consolidated VREs, Private Equity Funds of Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value		168
Total Unfunded Commitments		$ 22
Consolidated VIEs, Hedge Funds/Funds of Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	91
Total Unfunded Commitments	$ 0
Redemption Notice Period, days	90 days

Fair Value Disclosures - Inve61

Fair Value Disclosures - Investments in Certain Entities Calculate Net Asset Value per Share (Parenthetical) (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total Unfunded Commitments	$ 202	$ 129
Equity Method, Private Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Liquidation period, years	4 years	4 years
Total Unfunded Commitments	$ 66	$ 61
Equity Method, Real Estate Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Liquidation period, years	5 years	7 years
Total Unfunded Commitments	$ 20	$ 1
Consolidated Sponsored Investment Funds, Other Funds of Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption period		1 year
Equity Method, Hedge Funds/Funds of Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Liquidation period, years	2 years	2 years
Total Unfunded Commitments	$ 93	$ 39
Consolidated VIEs, Private Equity Funds of Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Liquidation period, years	6 years
Total Unfunded Commitments	$ 17
Total Unfunded Commitments	18
Amount of unfunded commitments contractually obligated to fund	$ 31
Consolidated VREs, Private Equity Funds of Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Liquidation period, years		7 years
Total Unfunded Commitments		$ 22
Amount of unfunded commitments contractually obligated to fund		$ 31

Fair Value Disclosures - Summar

Fair Value Disclosures - Summary of Information Related to those Assets and Liabilities for which Fair Value Option was Elected (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate principal amounts outstanding	$ 4,980
Fair value	$ 5,219
CLO Bank Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate principal amounts outstanding		$ 3,338
Fair value		3,260
Aggregate unpaid principal balance in excess of (less than) fair value		78
Aggregate fair value of loans more than 90 days past due		2
Aggregate unpaid principal balance in excess of fair value for loans more than 90 days past due		4
CLO Bank Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Unpaid principal balance of loans more than 90 days past due		6
CLO Borrowings [Member] | Consolidated Variable Interest Entities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate principal amounts outstanding		3,508
Fair value		$ 3,389

Derivatives and Hedging - Addit

Derivatives and Hedging - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Derivative maximum risk of loss for credit protection	$ 17
Total Return Swaps [Member]
Derivative [Line Items]
Notional value	251	$ 238
Forward Foreign Currency Exchange Contracts [Member]
Derivative [Line Items]
Notional value	193	201
Interest Rate Swaps [Member]
Derivative [Line Items]
Notional value	$ 86	$ 84

Goodwill - Goodwill Activity (D

Goodwill - Goodwill Activity (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Mar. 31, 2015	Jun. 30, 2015
Goodwill [Line Items]
Beginning balance		$ 12,961
Goodwill adjustment related to Quellos		(10)
Ending balance		12,970
BlackRock Kelso Capital Advisors LLC [Member]
Goodwill [Line Items]
BKCA acquisition	$ 19	$ 19

Goodwill - Goodwill Activity (P

Goodwill - Goodwill Activity (Parenthetical) (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Decrease in goodwill	$ 10
Excess of tax goodwill over book goodwill	$ 263	$ 247

Goodwill - Additional Informati

Goodwill - Additional Information (Detail) - BlackRock Kelso Capital Advisors LLC [Member] - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Mar. 31, 2015	Jun. 30, 2015
Goodwill [Line Items]
Increase in goodwill from acquisition	$ 19	$ 19
Purchase price	$ 100

Intangible Assets - Carrying Am

Intangible Assets - Carrying Amounts of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Schedule Of Intangible Assets [Line Items]
Intangible assets, Beginning balance			$ 17,344
Amortization expense	$ (35)	$ (41)	(70)	$ (82)
Intangible assets, Ending balance	17,394		17,394
BlackRock Kelso Capital Advisors LLC [Member]
Schedule Of Intangible Assets [Line Items]
BKCA acquisition			120
Indefinite-lived intangible assets [Member]
Schedule Of Intangible Assets [Line Items]
Intangible assets, Beginning balance			16,988
Amortization expense			0
Intangible assets, Ending balance	17,108		17,108
Indefinite-lived intangible assets [Member] | BlackRock Kelso Capital Advisors LLC [Member]
Schedule Of Intangible Assets [Line Items]
BKCA acquisition			120
Finite-lived intangible assets [Member]
Schedule Of Intangible Assets [Line Items]
Intangible assets, Beginning balance			356
Amortization expense			(70)
Intangible assets, Ending balance	$ 286		286
Finite-lived intangible assets [Member] | BlackRock Kelso Capital Advisors LLC [Member]
Schedule Of Intangible Assets [Line Items]
BKCA acquisition			$ 0

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2015USD ($)
BlackRock Kelso Capital Advisors LLC [Member]
Schedule Of Intangible Assets [Line Items]
Indefinite-lived intangible assets increased by acquisition	$ 120

Borrowings - Additional Informa

Borrowings - Additional Information (Detail)	May. 06, 2015USD ($)	Jun. 30, 2015USD ($)	Apr. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015EUR (€)	Jun. 30, 2015USD ($)	May. 06, 2015EUR (€)	May. 06, 2015USD ($)	Dec. 31, 2014USD ($)
Debt Instrument [Line Items]
Unsecured revolving credit facility								$ 4,000,000,000
Line of credit facility, covenant terms					The 2015 credit facility requires the Company not to exceed a maximum leverage ratio (ratio of net debt to earnings before interest, taxes, depreciation and amortization, where net debt equals total debt less unrestricted cash) of 3 to 1
Line of credit facility, covenant compliance					Satisfied with a ratio of less than 1 to 1
Commercial paper notes outstanding								0			$ 0
Long-term borrowings								4,947,000,000			4,922,000,000
Long-term debt, fair value											$ 5,309,000,000
Repayments of long-term borrowings					$ 750,000,000	$ 0
Other Comprehensive Income [Member]
Debt Instrument [Line Items]
Gain on derivatives recognized in other comprehensive income				$ 7,000,000	7,000,000
Amount of ineffectiveness on net investment hedges				$ 0	$ 0
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Debt Instrument [Line Items]
Debt offering designated as net investment hedge to offset its currency exposure | €							€ 700,000,000
2025 Notes [Member]
Debt Instrument [Line Items]
Interest rate									1.25%	1.25%
Amount of debt issued								$ 780,000,000	€ 700,000,000
Senior unsecured notes maturity date	May 6, 2025
Approximate annual interest expense	$ 10,000,000
Debt instrument, payment terms					Annually on May 6 of each year
Amount of discount at issuance										$ 3,000,000
1.375% Notes due 2015 [Member]
Debt Instrument [Line Items]
Repayments of long-term borrowings		$ 750,000,000
Interest rate							1.375%	1.375%
2015 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Additional amount available, subject to lender credit approval			$ 1,000,000,000
Extended debt instrument maturity date					2020-03
Unsecured revolving credit facility			4,000,000,000
Amount outstanding under credit facility								$ 0
2015 Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maximum amount available under facility			$ 5,000,000,000

Borrowings - Carrying Value and

Borrowings - Carrying Value and Fair Value of Long-Term Borrowings (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Maturity Amount	$ 4,980
Unamortized discount and Debt Issuance Costs	(33)
Carrying Value	4,947	$ 4,922
Fair value	5,219
6.25% Notes due 2017 [Member]
Debt Instrument [Line Items]
Maturity Amount	700
Unamortized discount and Debt Issuance Costs	(2)
Carrying Value	698
Fair value	775
5.00% Notes due 2019 [Member]
Debt Instrument [Line Items]
Maturity Amount	1,000
Unamortized discount and Debt Issuance Costs	(4)
Carrying Value	996
Fair value	1,118
4.25% Notes due 2021 [Member]
Debt Instrument [Line Items]
Maturity Amount	750
Unamortized discount and Debt Issuance Costs	(5)
Carrying Value	745
Fair value	821
3.375% Notes due 2022 [Member]
Debt Instrument [Line Items]
Maturity Amount	750
Unamortized discount and Debt Issuance Costs	(6)
Carrying Value	744
Fair value	773
3.50% Notes due 2024 [Member]
Debt Instrument [Line Items]
Maturity Amount	1,000
Unamortized discount and Debt Issuance Costs	(8)
Carrying Value	992
Fair value	1,007
1.25% Notes due 2025 [Member]
Debt Instrument [Line Items]
Maturity Amount	780
Unamortized discount and Debt Issuance Costs	(8)
Carrying Value	772
Fair value	$ 725

Borrowings - Carrying Value a71

Borrowings - Carrying Value and Fair Value of Long-Term Borrowings (Parenthetical) (Detail) - Jun. 30, 2015	Total
6.25% Notes due 2017 [Member]
Debt Instrument [Line Items]
Long-term borrowings interest rate	6.25%
Debt instrument maturity date	2,017
5.00% Notes due 2019 [Member]
Debt Instrument [Line Items]
Long-term borrowings interest rate	5.00%
Debt instrument maturity date	2,019
4.25% Notes due 2021 [Member]
Debt Instrument [Line Items]
Long-term borrowings interest rate	4.25%
Debt instrument maturity date	2,021
3.375% Notes due 2022 [Member]
Debt Instrument [Line Items]
Long-term borrowings interest rate	3.375%
Debt instrument maturity date	2,022
3.50% Notes due 2024 [Member]
Debt Instrument [Line Items]
Long-term borrowings interest rate	3.50%
Debt instrument maturity date	2,024
1.25% Notes due 2025 [Member]
Debt Instrument [Line Items]
Long-term borrowings interest rate	1.25%
Debt instrument maturity date	2,025

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - Jun. 30, 2015 - USD ($) $ in Millions	Total
Loss Contingencies [Line Items]
Various capital commitments to fund sponsored investment funds, including funds of private equity funds, real estate funds, infrastructure funds, opportunistic funds and distressed credit funds	$ 417
Contingent commitments	32
Derivative maximum risk of loss for credit protection	17
Loan balances	147,300
Collateral for indemnified securities	$ 156,500
Credit Suisse's [Member]
Loss Contingencies [Line Items]
Fee measurement period	7 years
MGPA [Member]
Loss Contingencies [Line Items]
Fee measurement period	5 years
BlackRock Kelso Capital Advisors LLC [Member]
Loss Contingencies [Line Items]
Fee measurement period	3 years

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock and RSU Activity (Detail) - $ / shares	6 Months Ended
	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock and RSUs, beginning of period	3,401,909
Restricted Stock and RSUs, Granted	1,290,014
Restricted Stock and RSUs, Converted	(1,566,979)
Restricted Stock and RSUs, Forfeited	(26,091)
Restricted Stock and RSUs, end of period	3,098,853
Weighted-Average Grant Date Fair Value, beginning of period	$ 257.01
Weighted-Average Grant Date Fair Value, Granted	344.36
Weighted-Average Grant Date Fair Value, Converted	228.78
Weighted-Average Grant Date Fair Value, Forfeited	300.08
Weighted-Average Grant Date Fair Value, end of period	$ 307.28
Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock and RSUs, beginning of period	0
Restricted Stock and RSUs, Granted	262,847
Restricted Stock and RSUs, end of period	262,847
Weighted-Average Grant Date Fair Value, beginning of period	$ 0
Weighted-Average Grant Date Fair Value, Granted	343.86
Weighted-Average Grant Date Fair Value, end of period	$ 343.86

Stock-Based Compensation - Re74

Stock-Based Compensation - Restricted Stock and RSU Activity (Parenthetical) (Detail) shares in Millions	Jun. 30, 2015shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation awards expected to vest	2.9
Awards vested, not converted	0.2
Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation awards expected to vest	0.3

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended
	Jan. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock and RSUs, Granted		1,290,014
Restricted stock units vesting period, years	3 years
Intrinsic value of outstanding RSUs		$ 1,100
Stock price		$ 345.98
Restricted Stock and RSUs outstanding		3,098,853	3,401,909
Weighted Average Grant Date Fair Value		$ 307.28	$ 257.01
Share-based compensation awards expected to vest		2,900,000
Remaining average life of stock options		2 years
Long-Term Incentive Plans Funded by PNC [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares committed to fund long-term incentive plans		4,000,000
Number of additional shares surrendered		2,700,000
Remaining shares committed by PNC for long-term incentive awards		1,300,000
RSU Awards To Employees Annual Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock and RSUs, Granted	952,329
Awards Granted That Cliff Vest 100% [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards to employees cliff vesting	303,999
RSUs to employees that cliff vest, percentage	100.00%
RSUs to employees that cliff vest, date		Jan. 31, 2018
Restricted Stock and RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense		$ 499
Remaining weighted-average period		1 year 3 months 18 days
Market Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock and RSUs, Granted		0
Intrinsic value of outstanding RSUs		$ 493
Stock price		$ 345.98
Unrecognized stock-based compensation expense		$ 75
Remaining weighted-average period		1 year 4 months 24 days
Restricted Stock and RSUs outstanding		1,425,319	1,425,319
Weighted Average Grant Date Fair Value		$ 137.31	$ 137.31
Share-based compensation awards expected to vest		1,400,000
Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock and RSUs, Granted		262,847
Restricted stock units vesting period, years	3 years
Awards to employees cliff vesting	262,847
RSUs to employees that cliff vest, percentage	100.00%
RSUs to employees that cliff vest, date		Jan. 31, 2018
Intrinsic value of outstanding RSUs		$ 90.9
Stock price		$ 345.98
Unrecognized stock-based compensation expense		$ 77
Remaining weighted-average period		2 years 7 months 6 days
Restricted Stock and RSUs outstanding		262,847	0
Weighted Average Grant Date Fair Value		$ 343.86	$ 0
Share-based compensation awards expected to vest		300,000
Grant-date fair market value expected to vest		$ 90

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Detail) - 6 months ended Jun. 30, 2015 - $ / shares	Total
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, Shares under option, beginning of period	906,719
Exercised, Shares under option	(42,116)
Outstanding, Shares under option, end of period	864,603
Weighted average exercise price, beginning of period	$ 167.76
Exercised, Weighted average exercise price	167.76
Weighted average exercise price, end of period	$ 167.76

Stock-Based Compensation - St77

Stock-Based Compensation - Stock Option Activity (Parenthetical) (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2015USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Aggregate intrinsic value of options exercised	$ 8.2

Net Capital Requirements - Addi

Net Capital Requirements - Additional Information (Detail) $ in Billions	Jun. 30, 2015USD ($)
Regulatory Capital Requirements [Abstract]
Net capital requirement in certain regulated subsidiaries	$ 1.1

Accumulated Other Comprehensi79

Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (439)	$ (35)	$ (273)	$ (35)
Other comprehensive income (loss) before reclassifications	100	34	(66)	42
Amount reclassified from AOCI	0	2	0	(6)
Other comprehensive income (loss)	100	36	(66)	36
Ending Balance	(339)	1	(339)	1
Unrealized Gains (Losses) on Available-for-Sale Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	2	(1)	2	7
Other comprehensive income (loss) before reclassifications	(1)	4	(1)	4
Amount reclassified from AOCI	0	2	0	(6)
Other comprehensive income (loss)	(1)	6	(1)	(2)
Ending Balance	1	5	1	5
Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	3	6	4	6
Other comprehensive income (loss) before reclassifications	0	0	(1)	0
Amount reclassified from AOCI	0	0	0	0
Other comprehensive income (loss)	0	0	(1)	0
Ending Balance	3	6	3	6
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(444)	(40)	(279)	(48)
Other comprehensive income (loss) before reclassifications	101	30	(64)	38
Amount reclassified from AOCI	0	0	0	0
Other comprehensive income (loss)	101	30	(64)	38
Ending Balance	$ (343)	$ (10)	$ (343)	$ (10)

Accumulated Other Comprehensi80

Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Parenthetical) (Detail) - Jun. 30, 2015 - USD ($) $ in Millions	Total	Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain from net investment hedging	$ 7	$ 7
Gain from net investment hedging, net of tax	4	4
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain from net investment hedging	7	7
Gain from net investment hedging, net of tax	$ 4	$ 4

Capital Stock - Preferred Share

Capital Stock - Preferred Shares Authorized, Issued and Outstanding (Detail) - shares	Jun. 30, 2015	Dec. 31, 2014
Series A Non-voting Participating Preferred Stock [Member]
Class of Stock [Line Items]
Shares authorized, $0.01 par value	20,000,000	20,000,000
Shares issued	0	0
Shares outstanding	0	0
Series B Non-voting Participating Preferred Stock [Member]
Class of Stock [Line Items]
Shares authorized, $0.01 par value	150,000,000	150,000,000
Shares issued	823,188	823,188
Shares outstanding	823,188	823,188
Series C Non-voting Participating Preferred Stock [Member]
Class of Stock [Line Items]
Shares authorized, $0.01 par value	6,000,000	6,000,000
Shares issued	1,311,887	1,311,887
Shares outstanding	1,311,887	1,311,887
Series D Non-voting Participating Preferred Stock [Member]
Class of Stock [Line Items]
Shares authorized, $0.01 par value	20,000,000	20,000,000
Shares issued	0	0
Shares outstanding	0	0

Capital Stock - Preferred Sha82

Capital Stock - Preferred Shares Authorized, Issued and Outstanding (Parenthetical) (Detail) - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Series A Non-voting Participating Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, par value	$ 0.01	$ 0.01
Series B Non-voting Participating Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, par value	0.01	0.01
Series C Non-voting Participating Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, par value	0.01	0.01
Series D Non-voting Participating Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, par value	$ 0.01	$ 0.01

Capital Stock - Additional Info

Capital Stock - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jan. 31, 2015
Stockholders' Equity Note [Abstract]
Common shares repurchased	1,500,000
Common shares repurchased, value	$ 550	$ 500
Share repurchase program authorized shares			9,400,000
Shares authorized to be repurchased	7,900,000

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Deferred tax expense (benefit)associated with the revaluation of deferred income tax liabilities as a result of tax changes	$ 13	$ 23	$ 16	$ 23
Nonrecurring tax benefits		$ 34	$ 69

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted EPS under Treasury Stock Method (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net income attributable to BlackRock	$ 819	$ 808	$ 1,641	$ 1,564
Basic weighted-average shares outstanding	166,616,558	168,712,221	166,851,492	168,895,801
Dilutive effect of nonparticipating RSUs and stock options	2,498,201	2,437,932	2,567,472	2,644,217
Total diluted weighted-average shares outstanding	169,114,759	171,150,153	169,418,964	171,540,018
Basic earnings per share	$ 4.92	$ 4.79	$ 9.84	$ 9.26
Diluted earnings per share	$ 4.84	$ 4.72	$ 9.69	$ 9.12

Segment Information - Additiona

Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2015Segment
Segment Reporting [Abstract]
Number of business segments	1

Segment Information - Schedule

Segment Information - Schedule of Investment Advisory, Administration Fees, Securities Lending Revenue and Performance Fees, BlackRock Solutions and Advisory Revenue, Distribution Fees and Other Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Revenue	$ 2,905	$ 2,778	$ 5,628	$ 5,448
BlackRock Solutions and advisory	161	146	308	300
Distribution fees	13	18	30	37
Other revenue	61	65	122	113
Investment Advisory, Administration Fees and Securities Lending Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	2,670	2,549	5,168	4,998
Investment Advisory, Administration Fees and Securities Lending Revenue [Member] | Equity Securities [Member]
Segment Reporting Information [Line Items]
Revenue	1,426	1,369	2,732	2,646
Investment Advisory, Administration Fees and Securities Lending Revenue [Member] | Fixed Income [Member]
Segment Reporting Information [Line Items]
Revenue	600	544	1,175	1,047
Investment Advisory, Administration Fees and Securities Lending Revenue [Member] | Multi-asset [Member]
Segment Reporting Information [Line Items]
Revenue	324	310	636	599
Investment Advisory, Administration Fees and Securities Lending Revenue [Member] | Alternatives [Member]
Segment Reporting Information [Line Items]
Revenue	244	253	476	559
Investment Advisory, Administration Fees and Securities Lending Revenue [Member] | Cash Management [Member]
Segment Reporting Information [Line Items]
Revenue	76	73	149	147
BlackRock Solutions and Advisory [Member]
Segment Reporting Information [Line Items]
BlackRock Solutions and advisory	161	146	308	300
Distribution Fees [Member]
Segment Reporting Information [Line Items]
Distribution fees	13	18	30	37
Other Revenue [Member]
Segment Reporting Information [Line Items]
Other revenue	$ 61	$ 65	$ 122	$ 113

Segment Information - Total Rev

Segment Information - Total Revenue by Geographic Region (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Revenue	$ 2,905	$ 2,778	$ 5,628	$ 5,448
Americas [Member]
Segment Reporting Information [Line Items]
Revenue	1,913	1,764	3,766	3,546
Europe [Member]
Segment Reporting Information [Line Items]
Revenue	847	882	1,588	1,639
Asia-Pacific [Member]
Segment Reporting Information [Line Items]
Revenue	$ 145	$ 132	$ 274	$ 263

Segment Information - Schedul89

Segment Information - Schedule of Long-Lived Assets by Geographic Region (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Long-lived assets	$ 13,515	$ 13,428
Americas [Member]
Segment Reporting Information [Line Items]
Long-lived assets	13,232	13,151
Europe [Member]
Segment Reporting Information [Line Items]
Long-lived assets	194	194
Asia-Pacific [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 89	$ 83