Other Assets	12 Months Ended
Dec. 31, 2015
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Other Assets	11. Other Assets At March 31, 2013, BlackRock held an approximately one-third economic equity interest in Private National Mortgage Acceptance Company, LLC (“PNMAC”), which is accounted for as an equity method investment and is included in other assets on the consolidated statements of financial condition. On May 8, 2013, PennyMac became the sole managing member of PNMAC in connection with an initial public offering of PennyMac (the “PennyMac IPO”). As a result of the 2013 PennyMac IPO, BlackRock recorded a noncash, nonoperating pre-tax gain of $39 million related to the carrying value of its equity method investment. Subsequent to the PennyMac IPO, in 2013 the Company contributed 6.1 million units of its PennyMac investment to a new donor advised fund (the “Charitable Contribution”). The fair value of the Charitable Contribution was $124 million and is included in general and administration expense on the consolidated statements of income for 2013. In connection with the Charitable Contribution, the Company also recorded a noncash, nonoperating pre-tax gain of $80 million related to the contributed investment and a tax benefit of approximately $48 million. The carrying value and fair value of the Company’s interest (approximately 20% or 16 million shares and units) was approximately $222 million and $239 million, respectively, at December 31, 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 December 31, 2015 and 2014, respectively (a Level 1 input).

11. Other Assets

At March 31, 2013, BlackRock held an approximately one-third economic equity interest in Private National Mortgage Acceptance Company, LLC (“PNMAC”), which is accounted for as an equity method investment and is included in other assets on the consolidated statements of financial condition. On May 8, 2013, PennyMac became the sole managing member of PNMAC in connection with an initial public offering of PennyMac (the “PennyMac IPO”). As a result of the 2013 PennyMac IPO, BlackRock recorded a noncash, nonoperating pre-tax gain of $39 million related to the carrying value of its equity method investment.

Subsequent to the PennyMac IPO, in 2013 the Company contributed 6.1 million units of its PennyMac investment to a new donor advised fund (the “Charitable Contribution”). The fair value of the Charitable Contribution was $124 million and is included in general and administration expense on the consolidated statements of income for 2013. In connection with the Charitable Contribution, the Company also recorded a noncash, nonoperating pre-tax gain of $80 million related to the contributed investment and a tax benefit of approximately $48 million.

The carrying value and fair value of the Company’s interest (approximately 20% or 16 million shares and units) was approximately $222 million and $239 million, respectively, at December 31, 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 December 31, 2015 and 2014, respectively (a Level 1 input).