Skadden, Arps, Slate, Meagher & Flom and Willkie Farr & Gallagher have picked up roles on the takeover of heavyweight payment processor Worldpay by Fidelity National Information Services (FIS), in a deal that will value the combined company at $43 billion.

Skadden's team is advising Worldpay with a team led out of the firm's New York office, headed up by corporate partners Peter Atkins and Sven Mickisch, co-head of financial institutions David Ingles, and compensation and benefits partner Joseph Penko. London M&A partner Scott Hopkins is also advising.

Florida-based FIS, a technology and outsourcing services provider for financial services, is being advised by Willkie. In the U.S., corporate partners Robert Rachofsky and Adam Turteltaub are leading for the firm, while in London asset management partner Henrietta de Salis, corporate tax partner Judith Harger and corporate partner Jennifer Tait also picked up roles.