Revenue (Tables)

12 Months Ended

Dec. 31, 2020

Revenue [Abstract]

Schedule of New Accounting Pronouncements

Consolidated Statements of Income

	For the Year Ended December 31, 2018
	As Reported		Balance without Adoption		Effect of Change
Net sales	$	7,202.5	$	7,202.3	$	0.2
Cost of merchandise sold		5,821.6		5,821.6		—

Consolidated Balance Sheet

	As of December 31, 2018
	As Reported		Balance without Adoption		Effect of Change
Merchandise inventory	$	658.7	$	668.2	$	(9.5)
Other current assets		54.1		54.4		(0.3)
Other non-current liabilities		8.7		19.4		(10.7)
Retained earnings		678.1		677.2		0.9

Disaggregation of Revenue

	For the Years Ended December 31,
	2020		2019		2018
Construction	58.1	%	58.4	%	58.2	%
CIG	26.8		26.5		26.2
Industrial & Utility	15.1		15.1		15.6
Total net sales	100.0	%	100.0	%	100.0	%