Related Party Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Related Party Transaction [Line Items]
Purchase commitments		$ 313.7		$ 300.0
Sales to related party		31.5	20.1
Purchases from related party		9.9	7.0
Head of cattle to be purchased per year from members of USPB, actual number		735,385
Percentage of cattle requirements obtained through USPB		23.70%	20.00%
Private Equity Related Funds [Member]
Related Party Transaction [Line Items]
Loans to and/or equity investments in related funds		65.3		61.7
Net income (losses) from private equity related funds	4.3	(11.1)	3.9
Company Chairman [Member]
Related Party Transaction [Line Items]
Ownership percentage of company		4.80%
Harbinger [Member]
Related Party Transaction [Line Items]
Loans outstanding to related party		8.8
Unsettled purchases and sales of loans		223.6
Employees [Member]
Related Party Transaction [Line Items]
Loans outstanding to related party		14.2		13.9
HomeFed Corporation [Member]
Related Party Transaction [Line Items]
Cash paid on acquisition of common shares		$ 12.5
Common shares acquired		7,500,000