EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share Table

	Three Months Ended March 31,
	2023		2022
Computation of Net Income per Share	(In millions, except per share data)
Net income	$	154.0	$	393.0
Net loss attributable to noncontrolling interests	(2.3)		—
Net income attributable to Olin Corporation	$	156.3	$	393.0
Basic shares	131.0		154.7
Basic net income attributable to Olin Corporation per share	$	1.19	$	2.54
Diluted shares:
Basic shares	131.0		154.7
Stock-based compensation	3.4		3.9
Diluted shares	134.4		158.6
Diluted net income attributable to Olin Corporation per share	$	1.16	$	2.48