CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 2,019.3	$ 2,883.5	$ 4,592.2	$ 5,840.1
Costs and expenses:
Cost of sales (exclusive of depreciation and amortization shown below)	1,404.6	2,029.9	3,196.8	4,119.6
Warehouse, delivery, selling, general and administrative	438.5	531.4	961.2	1,063.5
Depreciation and amortization	57.4	54.4	114.4	108.4
Impairment of long-lived assets	0.2	1.2	97.9	1.2
Total costs and expenses	1,900.7	2,616.9	4,370.3	5,292.7
Operating income	118.6	266.6	221.9	547.4
Other (income) expense:
Interest expense	14.6	23.7	31.5	47.9
Other expense (income), net	2.0	(2.9)	5.3	(1.8)
Income before income taxes	102.0	245.8	185.1	501.3
Income tax provision	21.3	61.5	41.5	125.4
Net income	80.7	184.3	143.6	375.9
Less: Net income attributable to noncontrolling interests	0.5	1.2	1.7	2.7
Net income attributable to Reliance	$ 80.2	$ 183.1	$ 141.9	$ 373.2
Earnings per share attributable to Reliance stockholders:
Diluted (in dollars per share)	$ 1.24	$ 2.69	$ 2.15	$ 5.49
Basic (in dollars per share)	$ 1.26	$ 2.73	$ 2.18	$ 5.56
Shares used in computing earnings per share:
Diluted (in shares)	64,582	67,977	65,915	67,951
Basic (in shares)	63,647	67,045	64,992	67,086
Cash dividends per share (in dollars per share)	$ 0.625	$ 0.55	$ 1.25	$ 1.10