Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 118.1	$ 126.3	$ 367.5	$ 356.5
Other Comprehensive Income
Foreign currency translation	(4.4)	(9.7)	(0.7)	(12.0)
Pension and postretirement benefits liability adjustments (net of tax of $(-), $(5.5), $(0.2) and $(8.5), respectively)	0.3	15.7	0.7	24.4
Total Other Comprehensive (Loss) Income	(4.1)	6.0		12.4
Comprehensive Income	114.0	132.3	367.5	368.9
Less: Comprehensive income (loss) attributable to noncontrolling interests, net of tax	0.1	(0.1)	0.6	0.3
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 113.9	$ 132.4	$ 366.9	$ 368.6