Related Party Transactions - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013 Vantiv Holding, LLC	Jun. 30, 2012 Vantiv Holding, LLC	Sep. 30, 2013 Vantiv Holding, LLC Class B Units	Sep. 30, 2013 Vantiv Holding, LLC Class C Units	Sep. 30, 2013 Vantiv, Inc. Class B Units
Related Party Transaction
Equity Method Investment, Ownership Percentage			25.00%
Percentage Of Vantiv Holding, LLC sold			3.00%	5.00%
Equity investments, carrying value			$ 415
Gain on sale of shares	$ 85	$ 242
Units of Vantiv Holding LLC Held					48,800,000	20,400,000
Voting power in Vantiv							18.50%
Shares Held Vantiv Inc							48,800,000