Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 154.0	$ 393.0
Other comprehensive income, net of tax:
Foreign currency translation adjustments	5.5	(10.5)
Unrealized gains on derivative contracts, net	7.4	30.7
Amortization of prior service costs and actuarial losses, net	0.3	6.6
Total other comprehensive income, net of tax	13.2	26.8
Comprehensive income	167.2	419.8
Comprehensive loss attributable to noncontrolling interests	(2.3)	0.0
Comprehensive income attributable to Olin Corporation	$ 169.5	$ 419.8