CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 3,623.0	$ 4,247.2	$ 11,468.6	$ 13,414.2
Costs and expenses:
Cost of sales (exclusive of depreciation and amortization shown below)	2,546.0	3,008.2	7,942.9	9,292.7
Warehouse, delivery, selling, general and administrative ("SG&A")	626.9	630.1	1,928.8	1,890.6
Depreciation and amortization	60.6	60.4	182.5	178.8
Total costs and expenses	3,233.5	3,698.7	10,054.2	11,362.1
Operating income	389.5	548.5	1,414.4	2,052.1
Other (income) expense:
Interest expense	9.7	15.6	30.3	46.8
Other (income) expense, net	(8.2)	8.9	(23.3)	21.5
Income before income taxes	388.0	524.0	1,407.4	1,983.8
Income tax provision	92.0	129.6	340.7	490.9
Net income	296.0	394.4	1,066.7	1,492.9
Less: net income attributable to noncontrolling interests	1.0	0.9	3.5	3.3
Net income attributable to Reliance	$ 295.0	$ 393.5	$ 1,063.2	$ 1,489.6
Earnings per share attributable to Reliance stockholders:
Basic (in dollars per share)	$ 5.05	$ 6.55	$ 18.13	$ 24.35
Diluted (in dollars per share)	$ 4.99	$ 6.45	$ 17.92	$ 23.98
Shares used in computing earnings per share:
Basic (in shares)	58,427	60,055	58,648	61,175
Diluted (in shares)	59,124	60,984	59,333	62,114