Selected Financial Information Relating To Company's Segments (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net Sales		$ 1,033.1	$ 967.9	$ 898.0	$ 877.2	$ 896.0	$ 870.7	$ 877.4	$ 849.0	$ 3,776.2	$ 3,493.1	$ 3,394.8
Gross profit		481.4	438.5	410.4	399.3	408.0	395.6	408.0	379.0	1,729.6	1,590.6	1,511.8
Marketing Expenses										454.2	427.2	417.5
Selling, General and Administrative Expenses										542.7	439.2	420.1
Income from Operations		214.7	$ 198.7	$ 123.2	$ 196.1	173.4	$ 196.0	$ 175.3	$ 179.5	732.7	724.2	674.2
Equity in Earnings (Losses) of Affiliates										10.8	9.2	(5.8)
Income Before Income Taxes										692.7	705.9	635.4
Identifiable Assets		6,014.8				4,354.1				6,014.8	4,354.1	4,256.9
Capital Expenditures										45.0	49.8	61.8
Depreciation & Amortization										125.4	107.6	101.0
Operating Segments | Consumer Domestic
Segment Reporting Information [Line Items]
Net Sales										2,854.9	2,677.8	2,581.6
Gross profit										1,380.1	1,308.8	1,215.7
Marketing Expenses										364.1	345.2	336.5
Selling, General and Administrative Expenses										366.6	350.7	326.2
Income from Operations										649.4	612.9	553.0
Equity in Earnings (Losses) of Affiliates										0.0	0.0	0.0
Income Before Income Taxes										606.4	590.6	529.4
Identifiable Assets		4,543.2				3,374.4				4,543.2	3,374.4	3,449.9
Capital Expenditures										30.6	34.9	51.5
Depreciation & Amortization										95.5	87.8	82.6
Operating Segments | Consumer International
Segment Reporting Information [Line Items]
Net Sales										621.1	525.2	501.0
Gross profit										281.0	235.4	226.8
Marketing Expenses										85.7	78.2	76.6
Selling, General and Administrative Expenses										158.5	89.0	93.3
Income from Operations										36.8	68.2	56.9
Equity in Earnings (Losses) of Affiliates										0.0	0.0	0.0
Income Before Income Taxes										32.0	66.3	54.5
Identifiable Assets		1,112.4				714.5				1,112.4	714.5	521.0
Capital Expenditures										8.9	8.8	7.2
Depreciation & Amortization										16.8	9.5	7.9
Operating Segments | Specialty Products
Segment Reporting Information [Line Items]
Net Sales										300.2	290.1	312.2
Gross profit										101.3	83.0	101.9
Marketing Expenses										4.4	3.8	4.4
Selling, General and Administrative Expenses										50.4	36.1	33.2
Income from Operations										46.5	43.1	64.3
Equity in Earnings (Losses) of Affiliates										0.0	0.0	0.0
Income Before Income Taxes										43.5	39.8	57.3
Identifiable Assets		268.5				181.3				268.5	181.3	206.5
Capital Expenditures										5.5	6.1	3.1
Depreciation & Amortization										10.3	8.6	8.5
Corporate
Segment Reporting Information [Line Items]
Net Sales	[1]									0.0	0.0	0.0
Gross profit	[1]									(32.8)	(36.6)	(32.6)
Marketing Expenses	[1]									0.0	0.0	0.0
Selling, General and Administrative Expenses	[1]									(32.8)	(36.6)	(32.6)
Income from Operations	[1]									0.0	0.0	0.0
Equity in Earnings (Losses) of Affiliates	[1]									10.8	9.2	(5.8)
Income Before Income Taxes	[1]									10.8	9.2	(5.8)
Identifiable Assets	[1]	$ 90.7				$ 83.9				90.7	83.9	79.5
Capital Expenditures	[1]									0.0	0.0	0.0
Depreciation & Amortization	[1]									$ 2.8	$ 1.7	$ 2.0

[1] The Corporate segment reflects the following: (A) The administrative costs of the production planning and logistics functions are included in segment Selling, General and Administrative expenses but are elements of Cost of Sales in the Company’s Consolidated Statements of Income. Such amounts were $32.8, $36.6, and $32.6 for 2017, 2016 and 2015, respectively. (B) Equity in earnings (loss) of affiliates from Armand and ArmaKleen for the year ended December 31, 2017 and 2016 and Armand, ArmaKleen and Natronx for the years ended December 31, 2015. (C) Corporate assets include deferred compensation investments and the Company's investment in unconsolidated affiliates.