Related Party Transactions - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Related Party Transaction
Gain on sale of shares	$ 125
Vantiv Holding, LLC
Related Party Transaction
Equity Method Investment, Ownership Percentage	23.00%
Percentage Of Vantiv Holding, LLC sold	3.00%
Equity investments, carrying value	384
Loans to related parties	$ 207	$ 348
Vantiv Holding, LLC | Class B Units
Related Party Transaction
Units of Vantiv Holding LLC Held	43,000,000
Vantiv Holding, LLC | Class C Units
Related Party Transaction
Units of Vantiv Holding LLC Held	20,400,000
Vantiv, Inc. | Class B Units
Related Party Transaction
Voting power in Vantiv	18.50%
Shares Held Vantiv Inc	43,000,000