The city of Detroit and its retirees have reached an agreement in a health insurance dispute that may end a lawsuit against the city. Retirees filed suit in November to stop the city from shifting them to Medicare and giving those under age 65 a $125 monthly stipend to buy their own insurance. The parties reached an agreement in principle Thursday night covering benefits through the end of 2014, mediators in Detroit's bankruptcy said Friday in a statement. Some features of the deal include the increase to $300 in the monthly stipend for retirees over age 65 who aren't eligible for Medicare. The stipend for retirees under age 65 will be increased to $175 if the household income is less than $75,000 and the retiree acquires insurance under a health care exchange. The stipend is $50 more than the amount proposed last year by emergency manager Kevyn Orr. A lawsuit retiree groups filed in bankruptcy court Jan. 9 challenging the city’s plan to slash benefits will be dismissed as a result of the settlement, according to a statement from the Detroit bankruptcy court mediators.