CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 2,974.5	$ 2,450.1	$ 8,720.5	$ 7,344.6
Costs and expenses:
Cost of sales (exclusive of depreciation and amortization shown below)	2,140.2	1,764.6	6,148.8	5,235.4
Warehouse, delivery, selling, general and administrative	531.0	470.0	1,586.3	1,422.1
Depreciation and amortization	53.4	54.0	161.8	164.2
Impairment of long-lived assets	35.5	2.8	35.5	2.8
Total costs and expenses	2,760.1	2,291.4	7,932.4	6,824.5
Operating income	214.4	158.7	788.1	520.1
Other (income) expense:
Interest expense	22.0	19.1	62.6	54.9
Other (income) expense, net	(2.5)	(2.6)	(1.2)	2.1
Income before income taxes	194.9	142.2	726.7	463.1
Income tax provision	44.6	43.2	172.2	145.9
Net income	150.3	99.0	554.5	317.2
Less: Net income attributable to noncontrolling interests	2.0	1.7	6.4	5.2
Net income attributable to Reliance	$ 148.3	$ 97.3	$ 548.1	$ 312.0
Earnings per share attributable to Reliance stockholders:
Diluted earnings per common share (in dollars per share)	$ 2.03	$ 1.32	$ 7.49	$ 4.24
Basic earnings per common share (in dollars per share)	2.06	1.33	7.57	4.28
Cash dividends per share (in dollars per share)	$ 0.50	$ 0.45	$ 1.50	$ 1.35