Related Party (Cash Flows to be Received from the TRA) (Parenthetical) (Detail) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2016
Vantiv, Inc.
Vantiv TRA Cash Flows
Potential Termination And Settlement Of Tra Cash Flows			$ 394
Estimated Cash Flow To Be Received Not Subject To Put Call Option
Vantiv TRA Cash Flows
Cash Flow To Be Received From Tra	[1],[2]	$ 609

[1] (a) The 2019 cash flow of $20 has been agreed upon with Worldpay, Inc., for settlement in January 2019 and was recognized as a gain in other noninterest income during the fourth quarter of 2018. The remaining estimated cash flows in this column (which include TRA benefits associated with the net exercise of the warrant in 2016, the subseque nt exchange of Worldpay Holding, LLC units in the third quarter of 201 7 and the subsequent exchange of World pay H olding, LLC units in the second quarter of 2018 ) will be recognized in future periods when the related uncertainties are resolved.

[2] (b) The estimated cash flows assume that Worldpay, Inc. has sufficient taxable income to utilize the tax deductions a ssociated with the TRA.