Other Noncurrent Assets (Tables)

3 Months Ended

Mar. 31, 2020

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Other Noncurrent Assets

	December31,		March 31,
	2019		2020
	(In millions)
Other noncurrent assets:
Land held for development	$	125.3	$	116.2
Operating lease right-of-use assets		29.0		27.0
Restricted cash and cash equivalents		33.0		33.4
IBNR receivables		8.5		7.9
Marketable securities		6.2		5.5
Pension asset		7.4		7.8
Note receivables - OPA		8.8		27.6
Other		11.9		8.4
Total	$	230.1	$	233.8