Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2016

Investments Debt And Equity Securities [Abstract]

Schedule of Marketable Securities

	Market value		Cost basis		Unrealized losses, net
	(In millions)
December 31, 2015:
Current assets	$	2.0	$	2.0	$	—
Noncurrent assets:
The Amalgamated Sugar Company LLC	$	250.0	$	250.0	$	—
Other		4.9		5.1		(.2	)
Total	$	254.9	$	255.1	$	(.2	)
March 31, 2016:
Current assets	$	1.7	$	1.7	$	—
Noncurrent assets:
The Amalgamated Sugar Company LLC	$	250.0	$	250.0	$	—
Other		4.6		4.8		(.2	)
Total	$	254.6	$	254.8	$	(.2	)