EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share Table

	Three Months Ended March 31,
	2024		2023
Computation of Net Income per Share	(In millions, except per share data)
Net income	$	47.8	$	154.0
Net loss attributable to noncontrolling interests	(0.8)		(2.3)
Net income attributable to Olin Corporation	$	48.6	$	156.3
Basic shares	119.9		131.0
Basic net income attributable to Olin Corporation per share	$	0.41	$	1.19
Diluted shares:
Basic shares	119.9		131.0
Stock-based compensation	2.0		3.4
Diluted shares	121.9		134.4
Diluted net income attributable to Olin Corporation per share	$	0.40	$	1.16