Goodwill And Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning Balance	$ 179.0	$ 83.1
Acquisitions and purchase accounting adjustments	53.8	95.7
Translation impact	(0.6)	0.2
Ending Balance	$ 232.2	$ 179.0

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

GRAYBAR ELECTRIC CO INC 10-K