Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 110.6	$ 124.4	$ 216.1	$ 249.4
Other Comprehensive (Loss) Income
Foreign currency translation	(1.8)	3.6	(5.9)	3.7
Pension and postretirement benefits liability adjustments (net of tax of $(0.6), $(0.1), $(1.0) and $(0.2) respectively)	1.7	0.2	2.8	0.4
Total Other Comprehensive (Loss) Income	(0.1)	3.8	(3.1)	4.1
Comprehensive Income	110.5	128.2	213.0	253.5
Less: comprehensive income attributable to noncontrolling interests, net of tax	0.2	0.3	0.4	0.5
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 110.3	$ 127.9	$ 212.6	$ 253.0