Is FIS owned by Worldpay?

Could you please clarify the ownership structure between FIS and Worldpay? Are they separate entities, or is FIS indeed owned by Worldpay? I'm interested in understanding the relationship between the two companies and how it may impact their operations and market position. Additionally, could you provide any insights into the strategic rationale behind any potential ownership arrangement between the two? Thank you for your time and assistance in addressing this query.