CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 2,025.3	$ 2,288.3
Costs and expenses:
Cost of sales (exclusive of depreciation and amortization shown below)	1,496.5	1,710.5
Warehouse, delivery, selling, general and administrative	357.7	357.7
Depreciation and amortization	41.1	35.5
Total costs and expenses	1,895.3	2,103.7
Operating income	130.0	184.6
Other income (expense):
Interest	(13.1)	(14.5)
Other income, net	2.9	6.5
Income before income taxes	119.8	176.6
Income tax provision	35.3	58.7
Net income	84.5	117.9
Less: Net income attributable to noncontrolling interests	0.8	1.7
Net income attributable to Reliance	$ 83.7	$ 116.2
Earnings per share:
Diluted earnings per common share attributable to Reliance shareholders (in dollars per share)	$ 1.09	$ 1.54
Basic earnings per common share attributable to Reliance shareholders (in dollars per share)	$ 1.10	$ 1.55
Cash dividends per share (in dollars per share)	$ 0.30	$ 0.15