Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 125.0	$ 102.4
Other Comprehensive Income
Foreign currency translation	0.1	2.2
Pension and postretirement benefits liability adjustments (net of tax of $(0.1), and $(1.4), respectively)	0.2	4.4
Total Other Comprehensive Income	0.3	6.6
Comprehensive Income	125.3	109.0
Less: Comprehensive income attributable to noncontrolling interests, net of tax	0.2	0.3
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 125.1	$ 108.7