Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 47.8	$ 154.0
Other comprehensive income, net of tax:
Foreign currency translation	(2.3)	5.5
Cash flow hedges	7.7	7.4
Pension and postretirement benefits	1.2	0.3
Total other comprehensive income, net of tax	6.6	13.2
Comprehensive income	54.4	167.2
Comprehensive loss attributable to noncontrolling interests	(0.8)	(2.3)
Comprehensive income attributable to Olin Corporation	$ 55.2	$ 169.5