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REPORTABLE SEGMENT Sales and Operating Profit (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Dec. 28, 2014
Segment Reporting Information [Line Items]
Segment sales	$ 4,180.3us-gaap_Revenues	$ 4,159.8us-gaap_Revenues
Sales	3,616.5us-gaap_SalesRevenueGoodsNet	3,422.1us-gaap_SalesRevenueGoodsNet
Operating profit	188.2us-gaap_OperatingIncomeLoss	196.4us-gaap_OperatingIncomeLoss
Goodwill	1,622.4us-gaap_Goodwill		1,626.2us-gaap_Goodwill
Packaged Meats Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	1,709.6	1,548.5
Operating profit	172.5	121.3
Hog Production Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	806.4	849.5
Operating profit	(6.4)	9.5
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Operating profit	(27.0)	(30.2)
International Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	330.2	374.7
Operating profit	15.9	36.9
Fresh Pork Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	1,334.1	1,387.1
Operating profit	33.2	58.9
Intersegment Eliminations
Segment Reporting Information [Line Items]
Segment sales	(563.8)	(737.7)
Intersegment Eliminations \| Hog Production Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	(538.8)	(713.4)
Intersegment Eliminations \| International Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	(10.3)	(9.9)
Intersegment Eliminations \| Fresh Pork Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	$ (14.7)	$ (14.4)