CHICAGO--(BUSINESS WIRE)--Fitch Ratings has affirmed the Issuer Default Ratings (IDRs) of Tyson Foods, Inc. (Tyson; NYSE: TSN) at 'BBB/F2' and the IDR of its wholly-owned subsidiary - The Hillshire Brands Co. (Hillshire) - at 'BBB'. Fitch has simultaneously withdrawn the 'F2' short-term IDR on Hillshire. The Rating Outlook is Stable. KEY RATING DRIVERS Deleveraging, Debt Reduction: Total debt-to-EBITDA for the LTM period ended June 27, 2015 was 2.7x, down from 4.2x at the fiscal year ended Sept