FIS Global, one of the world’s largest banking IT companies, today talked up its Sainsbury’s technology deal inked last quarter, calling it a “very nice transaction for us.”

FIS made the deal to take over Sainbury’s banking technology last quarter.

The deal is worth at least $25 million to FIS. But officials on the company’s earnings call today implied that it would be “much larger than that” in the final analysis.

Sainsbury’s is a chain of more than 1,100 supermarkets and convenience stores in the United Kingdom. Sainsbury’s this year agreed to buy out Lloyds Bank’s 50% stake in its banking company in a $379 million deal. When the deal is complete, expected to be this year, Sainsbury’s will begin migrating customers from Lloyd’s IT infrastructure to an outsourced banking system provided by FIS Global. The migration will apparently take around three and a half years.

What FIS did not talk much about today was the German bank that ditched it. The loss of the German bank — which was not named — will cost FIS approximately “four points of headwind.” We believe that implies a negative 4% vs. FIS sales revenue.

The Jacksonville, Fla.-based banking technology company announced revenues of $1.51 billion, up from $1.46 billion during the same time period last year, but lower than analysts’ estimates of $1.53 billion. FIS stock price [ticker: FIS] is trading around 1.5% lower this morning.