Other Noncurrent Liabilities (Tables)

3 Months Ended

Mar. 31, 2021

Other Liabilities Disclosure [Abstract]

Components of Other Noncurrent Liabilities

	December 31,		March 31,
	2020		2021
	(In millions)
Accrued postretirement benefits	$	8.7	$	8.8
Employee benefits		6.2		5.8
Other		11.8		11.9
Total	$	26.7	$	26.5