Consolidated Statements Of Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Consolidated Statements Of Income [Abstract]
Net Sales		$ 11,042.4	$ 10,534.4	$ 8,767.3
Cost of merchandise sold		(8,818.6)	(8,387.3)	(7,078.1)
Gross Margin		2,223.8	2,147.1	1,689.2
Selling, general and administrative expenses		(1,525.0)	(1,442.8)	(1,240.5)
Depreciation and amortization		(66.1)	(53.4)	(49.8)
Other income, net		4.6	2.9	11.5
Income from Operations		637.3	653.8	410.4
Non-operating expenses, net		(8.0)	(44.3)	(59.5)
Income before Provision for Income Taxes		629.3	609.5	350.9
Provision for income taxes		(164.9)	(155.8)	(87.9)
Net Income		464.4	453.7	263.0
Net income attributable to noncontrolling interests		(1.0)	(0.8)	(0.6)
Net Income attributable to Graybar Electric Company, Inc.		$ 463.4	$ 452.9	$ 262.4
Net Income attributable to Graybar Electric Company, Inc. per share of Common Stock	[1]	$ 14.42	$ 14.21	$ 8.34

[1] Adjusted for the declaration of a 20% stock dividend in December 2023, shares related to which were issued in February 2024. Prior to the adjustment, the average common shares outstanding were 26.6 million shares and 26.2 million shares for the years ended December 31, 2022 and 2021, respectively.