Related Party Transactions - Revenues for Services Provided to Related Parties (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Revenues from related parties	$ 7,084	$ 6,994	$ 6,260
Investment Advisory, Administration Fees and Securities Lending Revenue [Member]
Related Party Transaction [Line Items]
Revenues from related parties	6,875	6,738	5,991
Investment Advisory, Administration Fees and Securities Lending Revenue [Member] \| PNC and Affiliates [Member]
Related Party Transaction [Line Items]
Revenues from related parties	4	5	5
Investment Advisory, Administration Fees and Securities Lending Revenue [Member] \| Registered Investment Companies/Equity Method Investees [Member]
Related Party Transaction [Line Items]
Revenues from related parties	6,871	6,733	5,986
Investment Advisory Performance Fees [Member]
Related Party Transaction [Line Items]
Revenues from related parties	129	173	185
BlackRock Solutions and Advisory [Member]
Related Party Transaction [Line Items]
Revenues from related parties	7	13	23
BlackRock Solutions and Advisory [Member] \| PNC and Affiliates [Member]
Related Party Transaction [Line Items]
Revenues from related parties	7	7	7
BlackRock Solutions and Advisory [Member] \| Equity Method Investees [Member]
Related Party Transaction [Line Items]
Revenues from related parties		6	11
BlackRock Solutions and Advisory [Member] \| Other [Member]
Related Party Transaction [Line Items]
Revenues from related parties	0	0	5
Other Revenue [Member]
Related Party Transaction [Line Items]
Revenues from related parties	73	70	61
Other Revenue [Member] \| PNC and Affiliates [Member]
Related Party Transaction [Line Items]
Revenues from related parties	3	3	3
Other Revenue [Member] \| Equity Method Investees [Member]
Related Party Transaction [Line Items]
Revenues from related parties	$ 70	$ 67	$ 58