Well, why don't I start Ashwin, and I'll let Woody chime in. I mean honestly when you look at the operating synergies, the team just did an outstanding job refinancing Worldpay's debt, I mean really generating over $100 million of savings there. So that's where obviously we needed to increase our $400 million target on that number going forward.Obviously we got very high confidence in the operating synergies. As you know, we've historically exceeded those -- exceeded our synergy expectations by more than 30%.As you look at our revenue side, we're increasing the rate at which our revenue is on-boarding. We've now extended beyond $500 million. I think, we've just to my points earlier, really are getting clearer line of sight of, how those revenues are going to come on board.So, Woody talked about it, but I can't trivialize how hard the teams had worked between signing and close. If you look at all of the prepared information you do a combined call like this, is not nothing short of amazing.But also, all of the business owners have really been doing deep dives, week in and week out, building those plans around, where we're going to tackle the expense side, and the revenue side. So that's all. Well that's really what's been the big change, since our last public conversation about those topics.So high confidence on the $500 million, we see that revenue coming in earlier than what we originally expected, which is great. That will actually smooth that curve out some, over the next three years.When you look at the operating expense, frankly we want to make sure that everybody saw the interest savings that we did here. And stay committed to the original guide on our OpEx. So that's when we raised that overall expense savings number.But we're very pleased, at where we are at this point in time. The cultures of the companies have come together very well. I commented the landing of the leadership team from Worldpay, in key positions and FIS was very important to me personally. So, all of that just gives us a lot of confidence, as we go in to the back half of the year, and into 2020.