Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 105.5	$ 125.0
Other Comprehensive (Loss) Income
Foreign currency translation	(4.1)	0.1
Pension and postretirement benefits liability adjustments (net of tax of $(0.4), and $(0.1), respectively)	1.1	0.2
Total Other Comprehensive (Loss) Income	(3.0)	0.3
Comprehensive Income	102.5	125.3
Less: comprehensive income attributable to noncontrolling interests, net of tax	0.2	0.2
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 102.3	$ 125.1