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REPORTABLE SEGMENT Sales and Operating Profit (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2016	Mar. 29, 2015	Jan. 03, 2016
Segment Reporting Information [Line Items]
Segment sales	$ 3,800.6	$ 4,180.3
Sales	3,306.3	3,616.5
Operating profit	210.1	188.2
Goodwill	1,623.2		$ 1,619.5
Packaged Meats Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	1,745.3	1,709.6
Operating profit	207.1	172.5
Hog Production Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	620.3	806.4
Operating profit	(83.5)	(6.4)
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Operating profit	(27.6)	(27.0)
International Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	316.8	330.2
Operating profit	14.2	15.9
Fresh Pork Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	1,118.2	1,334.1
Operating profit	99.9	33.2
Intersegment Eliminations
Segment Reporting Information [Line Items]
Segment sales	(494.3)	(563.8)
Intersegment Eliminations \| Hog Production Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	(468.1)	(538.8)
Intersegment Eliminations \| International Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	(11.0)	(10.3)
Intersegment Eliminations \| Fresh Pork Segment [Member]
Segment Reporting Information [Line Items]
Segment sales	$ (15.2)	$ (14.7)