Other Income, Net (Tables)

9 Months Ended

Sep. 30, 2017

Other Income And Expenses [Abstract]

Schedule of Components of Other Income

	Nine months ended September  30,
	2016		2017
	(In millions)
Securities earnings:
Dividends and interest	$	20.3	$	21.6
Securities transactions, net		.2		.1
Total		20.5		21.7
Currency transactions, net		3.2		(8.0	)
Insurance recoveries		.4		.2
Business interruption insurance proceeds		3.4		—
Termination fee		—		4.0
Other, net		.8		1.9
Total	$	28.3	$	19.8