CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 1,340.1	$ 1,844.2	$ 1,417.4
Other comprehensive income (loss):
Foreign currency translation gain (loss)	8.3	(28.8)	(2.5)
Pension and postretirement benefit adjustments, net of tax	1.3	11.4	11.5
Total other comprehensive income (loss)	9.6	(17.4)	9.0
Comprehensive income	1,349.7	1,826.8	1,426.4
Less: comprehensive income attributable to noncontrolling interests	4.2	4.1	4.4
Comprehensive income attributable to Reliance	$ 1,345.5	$ 1,822.7	$ 1,422.0