Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 464.4	$ 453.7	$ 263.0
Other Comprehensive Income (Loss)
Foreign currency translation	4.0	(9.8)	0.1
Pension and postretirement benefits liability adjustments (net of tax of $10.1, $(13.0), and $(22.9), respectively)	(29.1)	37.3	66.1
Total Other Comprehensive (Loss) Income	(25.1)	27.5	66.2
Comprehensive Income	439.3	481.2	329.2
Less: comprehensive income attributable to noncontrolling interests, net of tax	1.0	0.6	0.6
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 438.3	$ 480.6	$ 328.6