Related Party Transactions - Aggregate Expenses Included in Consolidated Statements of Income for Transactions with Related Parties (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Expenses with related parties	$ 80	$ 62	$ 52
Distribution and Servicing Costs [Member]
Related Party Transaction [Line Items]
Expenses with related parties	2	2	2
Distribution and Servicing Costs [Member] \| PNC and Affiliates [Member]
Related Party Transaction [Line Items]
Expenses with related parties	2	2	2
General and Administrative Expenses [Member]
Related Party Transaction [Line Items]
Expenses with related parties	78	60	50
General and Administrative Expenses [Member] \| Other Registered Investment Companies [Member]
Related Party Transaction [Line Items]
Expenses with related parties	60	55	50
General and Administrative Expenses [Member] \| Other [Member]
Related Party Transaction [Line Items]
Expenses with related parties	$ 18	$ 5	$ 0