The Kraft Heinz Co. is gearing for a major federal court battle with Aetna Inc., alleging the Hartford, Connecticut-based insurer violated its fiduciary duties to enrich itself at the plaintiff’s expense, reports BenefitsPro. The lawsuit, The Kraft Heinz Co. Employee Benefits Administration Board vs. Aetna Life Insurance Co., states that since 2012 Aetna took more than $1.3 billion from Kraft Heinz to pay providers for medical services, the report says. That sum includes “millions of dollars in provider claims that never should have been paid,” the complaint alleges.