Allowances For Cash Discounts And Credit Losses (Schedule of Cash Discounts and Doubtful Accounts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 13.4	$ 9.1	$ 6.9
Provision (Charged to Expense)	57.9	56.3	46.2
Deductions	(57.7)	(52.0)	(44.0)
Ending Balance	13.6	13.4	9.1
Allowance for Cash Discounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	3.6	3.8	2.9
Provision (Charged to Expense)	51.7	47.4	44.3
Deductions	(51.7)	(47.6)	(43.4)
Ending Balance	3.6	3.6	3.8
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	9.8	5.3	4.0
Provision (Charged to Expense)	6.2	8.9	1.9
Deductions	(6.0)	(4.4)	(0.6)
Ending Balance	$ 10.0	$ 9.8	$ 5.3