Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 124.4	$ 127.8	$ 249.4	$ 230.2
Other Comprehensive Income
Foreign currency translation	3.6	(4.5)	3.7	(2.3)
Pension and postretirement benefits liability adjustments (net of tax of $(0.1), $(1.6), $(0.2) and $(3.0), respectively)	0.2	4.3	0.4	8.7
Total Other Comprehensive Income (Loss)	3.8	(0.2)	4.1	6.4
Comprehensive Income	128.2	127.6	253.5	236.6
Less: Comprehensive income attributable to noncontrolling interests, net of tax	0.3	0.1	0.5	0.4
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 127.9	$ 127.5	$ 253.0	$ 236.2