Other Assets (Tables)

3 Months Ended

Mar. 31, 2023

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Other Assets

	December 31,		March 31,
	2022		2023
	(In millions)
Other noncurrent assets:
Restricted cash and cash equivalents	$	37.2	$	30.9
Note receivables - OPA		49.3		46.5
Land held for development		29.7		29.6
Operating lease right-of-use assets		21.5		21.3
IBNR receivables		16.8		15.4
Pension asset		9.3		9.8
Other		24.3		24.8
Total	$	188.1	$	178.3