Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 101.1	$ 105.5
Other Comprehensive Income (Loss)
Foreign currency translation	0.3	(4.1)
Pension and postretirement benefits liability adjustments (net of tax of $(0.6), and $(0.4) respectively)	1.8	1.1
Total Other Comprehensive Income (Loss)	2.1	(3.0)
Comprehensive Income	103.2	102.5
Less: Comprehensive income attributable to noncontrolling interests, net of tax	0.3	0.2
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 102.9	$ 102.3