CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 408.3	$ 349.2	$ 197.9
Other comprehensive income (loss):
Foreign currency translation gain (loss)	10.6	(9.9)	9.7
Unrealized gain (loss) on investments, net of tax	0.2	(0.2)	0.2
Minimum pension liability, net of tax	(3.5)	(9.0)	1.9
Total other comprehensive income (loss)	7.3	(19.1)	11.8
Comprehensive income	415.6	330.1	209.7
Less: comprehensive income attributable to noncontrolling interests	4.8	5.4	3.5
Comprehensive income attributable to Reliance	$ 410.8	$ 324.7	$ 206.2