Segments- net sales and income before income taxes (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net Sales		$ 1,455.9	$ 1,317.3	$ 4,339.9	$ 3,939.6	$ 179.0
Income before Income Taxes		234.0	234.5	772.2	747.2
Operating Segments
Segment Reporting Information [Line Items]
Net Sales	[1]	1,455.9	1,317.3	4,339.9	3,939.6
Income before Income Taxes	[2]	234.0	234.5	772.2	747.2
Operating Segments | Consumer Domestic
Segment Reporting Information [Line Items]
Net Sales	[1]	1,133.1	1,010.4	3,378.2	3,010.2
Income before Income Taxes	[2]	203.4	193.9	662.8	618.3
Operating Segments | Consumer International
Segment Reporting Information [Line Items]
Net Sales	[1]	244.4	219.7	716.9	664.8
Income before Income Taxes	[2]	22.7	22.7	79.1	80.8
Operating Segments | Specialty Products
Segment Reporting Information [Line Items]
Net Sales	[1]	78.4	87.2	244.8	264.6
Income before Income Taxes	[2]	6.2	14.2	22.2	38.1
Corporate
Segment Reporting Information [Line Items]
Net Sales	[1],[3]	0.0	0.0	0.0	0.0
Income before Income Taxes	[2],[3]	$ 1.7	$ 3.7	$ 8.1	$ 10.0

[1] Intersegment sales from Consumer International to Consumer Domestic, which are not reflected in the table, were $4.7 and $3.9 for the three months ended September 30, 2023 and September 30, 2022, respectively, and were $11.7 and $12.5 for the nine months ended September 30, 2023 and September 30, 2022, respectively.

[2] In determining income before income taxes, interest expense, investment earnings and certain aspects of other income and expense were allocated among segments based upon each segment’s relative income from operations.

[3] The Corporate segment consists of equity in earnings of affiliates from Armand and ArmaKleen for the three and nine months ended September 30, 2023 and September 30, 2022.