Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 126.3	$ 74.5	$ 356.5	$ 202.1
Other Comprehensive Income
Foreign currency translation	(9.7)	(3.4)	(12.0)	0.1
Pension and postretirement benefits liability adjustments (net of tax of $(5.5), $(11.6), $(8.5) and $(16.1), respectively)	15.7	33.7	24.4	46.5
Total Other Comprehensive Income	6.0	30.3	12.4	46.6
Comprehensive Income	132.3	104.8	368.9	248.7
Less: Comprehensive (loss) income attributable to noncontrolling interests, net of tax	(0.1)	0.1	0.3	0.5
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 132.4	$ 104.7	$ 368.6	$ 248.2