Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2014

Investments Debt And Equity Securities [Abstract]

Schedule of Marketable Securities

	Market value		Cost basis		Unrealized gains, net
	(In millions)
December 31, 2013:
Current assets	$	3.8	$	3.8	$	—
Noncurrent assets:
The Amalgamated Sugar Company LLC	$	250.0	$	250.0	$	—
Other		3.3		3.3		—
Total	$	253.3	$	253.3	$	—
September 30, 2014:
Current assets	$	3.4	$	3.4	$	—
Noncurrent assets:
The Amalgamated Sugar Company LLC	$	250.0	$	250.0	$	—
Other		5.1		5.1		—
Total	$	255.1	$	255.1	$	—