Restructuring and Relocation - Restructuring (Details) (USD $)	3 Months Ended		5 Months Ended	6 Months Ended	3 Months Ended		3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012 Restructuring position	Dec. 31, 2012 Restructuring	Mar. 31, 2014 Restructuring European Healthy snacking products Non-core business	Mar. 31, 2014 Restructuring Severance	Mar. 31, 2014 Headquarters Relocation
Restructuring Cost and Reserve [Line Items]
Gain (Loss) Related to Litigation Settlement							$ 1,000,000
Number of positions eliminated due to restructuring			300
Severance costs				11,000,000
Impairments primarily related to fixed assets and certain promotional and packaging materials included in inventories				5,000,000
Restructuring Reserve Roll Forward
Beginning balance						1,000,000
Restructuring costs	460,000	217,000		18,000,000
Amounts paid					(1,000,000)
Ending balance						1,000,000
Gain on sale of business					3,000,000
Approximate annual revenue contribution	$ 761,990,000	$ 774,252,000			$ 2,000,000