Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 127.8	$ 80.3	$ 230.2	$ 127.6
Other Comprehensive Income
Foreign currency translation	(4.5)	2.0	(2.3)	3.5
Pension and postretirement benefits liability adjustments (net of tax of $(1.6), $(2.3), $(3.0) and $(4.5), respectively)	4.3	6.2	8.7	12.8
Total Other Comprehensive (Loss) Income	(0.2)	8.2	6.4	16.3
Comprehensive Income	127.6	88.5	236.6	143.9
Less: Comprehensive income attributable to noncontrolling interests, net of tax	0.1	0.2	0.4	0.4
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 127.5	$ 88.3	$ 236.2	$ 143.5