Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions |
Total |
Additional Paid-in Capital [Member] |
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] |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Balance at Dec. 31, 2017 | $ 31,848 | $ 19,258 | [1] | $ 16,939 | $ (432) | $ (3,967) | $ 31,798 | $ 50 | $ 416 | ||||||||
| Net income | 2,171 | 2,162 | 2,162 | 9 | 1 | ||||||||||||
| Dividends declared | (969) | (969) | (969) | ||||||||||||||
| Stock-based compensation | 310 | 310 | [1] | 310 | |||||||||||||
| PNC preferred stock capital contribution | 58 | 58 | [1] | 58 | |||||||||||||
| Retirement of preferred stock | (58) | (58) | [1] | (58) | |||||||||||||
| Issuance of common shares related to employee stock transactions | 6 | (613) | [1] | 619 | 6 | ||||||||||||
| Employee tax withholdings related to employee stock transactions | (405) | (405) | (405) | ||||||||||||||
| Shares repurchased | (635) | (635) | (635) | ||||||||||||||
| Subscriptions (redemptions/distributions) — noncontrolling interest holders | (5) | (5) | 535 | ||||||||||||||
| Net consolidations (deconsolidations) of sponsored investment funds | (266) | ||||||||||||||||
| Other comprehensive income (loss) | (137) | (137) | (137) | ||||||||||||||
| Adoption of accounting guidance | 6 | (6) | |||||||||||||||
| Balance at Jun. 30, 2018 | 32,184 | 18,955 | [1],[2] | 18,138 | (575) | (4,388) | 32,130 | 54 | 686 | ||||||||
| Balance at Mar. 31, 2018 | 32,022 | 18,858 | [2] | 17,529 | (301) | (4,108) | 31,978 | 44 | 561 | ||||||||
| Net income | 1,083 | 1,073 | 1,073 | 10 | (5) | ||||||||||||
| Dividends declared | (464) | (464) | (464) | ||||||||||||||
| Stock-based compensation | 135 | 135 | [2] | 135 | |||||||||||||
| Issuance of common shares related to employee stock transactions | 3 | (38) | [2] | 41 | 3 | ||||||||||||
| Employee tax withholdings related to employee stock transactions | (21) | (21) | (21) | ||||||||||||||
| Shares repurchased | (300) | (300) | (300) | ||||||||||||||
| Subscriptions (redemptions/distributions) — noncontrolling interest holders | 183 | ||||||||||||||||
| Net consolidations (deconsolidations) of sponsored investment funds | (53) | ||||||||||||||||
| Other comprehensive income (loss) | (274) | (274) | (274) | ||||||||||||||
| Balance at Jun. 30, 2018 | 32,184 | 18,955 | [1],[2] | 18,138 | (575) | (4,388) | 32,130 | 54 | 686 | ||||||||
| Balance at Dec. 31, 2018 | 32,433 | 19,170 | [3] | 19,282 | (691) | (5,387) | 32,374 | 59 | 1,107 | ||||||||
| Net income | 2,056 | 2,056 | 2,056 | 17 | |||||||||||||
| Dividends declared | (1,071) | (1,071) | (1,071) | ||||||||||||||
| Stock-based compensation | 294 | 294 | [3] | 294 | |||||||||||||
| PNC preferred stock capital contribution | 60 | 60 | [3] | 60 | |||||||||||||
| Retirement of preferred stock | (60) | (60) | [3] | (60) | |||||||||||||
| Issuance of common shares related to employee stock transactions | 8 | (515) | [3] | 523 | 8 | ||||||||||||
| Employee tax withholdings related to employee stock transactions | (229) | (229) | (229) | ||||||||||||||
| Shares repurchased | (1,566) | (1,566) | (1,566) | ||||||||||||||
| Subscriptions (redemptions/distributions) — noncontrolling interest holders | 1 | 1 | 443 | ||||||||||||||
| Net consolidations (deconsolidations) of sponsored investment funds | (3) | (3) | (857) | ||||||||||||||
| Other comprehensive income (loss) | 27 | 27 | 27 | ||||||||||||||
| Balance at Jun. 30, 2019 | 31,950 | 18,949 | [3],[4] | 20,267 | (664) | (6,659) | 31,893 | 57 | 710 | ||||||||
| Balance at Mar. 31, 2019 | 31,362 | 18,829 | [4] | 19,779 | (623) | (6,676) | 31,309 | 53 | 1,009 | ||||||||
| Net income | 1,003 | 1,003 | 1,003 | 10 | |||||||||||||
| Dividends declared | (515) | (515) | (515) | ||||||||||||||
| Stock-based compensation | 140 | 140 | [4] | 140 | |||||||||||||
| Issuance of common shares related to employee stock transactions | 4 | (20) | [4] | 24 | 4 | ||||||||||||
| Employee tax withholdings related to employee stock transactions | (7) | (7) | (7) | ||||||||||||||
| Subscriptions (redemptions/distributions) — noncontrolling interest holders | 6 | 6 | 243 | ||||||||||||||
| Net consolidations (deconsolidations) of sponsored investment funds | (2) | (2) | (552) | ||||||||||||||
| Other comprehensive income (loss) | (41) | (41) | (41) | ||||||||||||||
| Balance at Jun. 30, 2019 | $ 31,950 | $ 18,949 | [3],[4] | $ 20,267 | $ (664) | $ (6,659) | $ 31,893 | $ 57 | $ 710 | ||||||||
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