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Debt and Capital Lease Obligations - Senior Unsecured Notes and Capital Lease Obligations (Narrative) (Details) - USD ($)
6 Months Ended
Sep. 17, 2014
Jun. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]      
Interest rate   5.375% 5.375%
Senior Notes [Member] | Senior Notes Due 2022 [Member]      
Debt Instrument [Line Items]      
Debt issued $ 500,000,000.0    
Interest rate 5.375%    
Repayment of debt $ 490,700,000    
Earthbound Farm [Member]      
Debt Instrument [Line Items]      
Capital lease expiration date   2033  
Minimum [Member] | Earthbound Farm [Member]      
Debt Instrument [Line Items]      
Interest rate on capital lease arrangements   3.10%  
Maximum [Member] | Earthbound Farm [Member]      
Debt Instrument [Line Items]      
Interest rate on capital lease arrangements   8.00%