Segment Net Sales and Income Before Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment Reporting Information [Line Items]
Net Sales	$ 804.8	[1]	$ 725.2	[1]	$ 2,371.7	[1]	$ 2,112.2	[1]
Income Before Income Taxes	163.2	[2]	146.0	[2]	458.6	[2]	412.3	[2]
Operating Segments | Consumer Domestic
Segment Reporting Information [Line Items]
Net Sales	605.3	[1]	530.4	[1]	1,790.8	[1]	1,547.5	[1]
Income Before Income Taxes	136.0	[2]	116.6	[2]	383.2	[2]	324.9	[2]
Operating Segments | Consumer International
Segment Reporting Information [Line Items]
Net Sales	134.5	[1]	131.1	[1]	396.5	[1]	373.8	[1]
Income Before Income Taxes	15.5	[2]	16.0	[2]	53.0	[2]	52.6	[2]
Operating Segments | SPD
Segment Reporting Information [Line Items]
Net Sales	65.0	[1]	63.7	[1]	184.4	[1]	190.9	[1]
Income Before Income Taxes	9.8	[2]	11.0	[2]	21.0	[2]	27.5	[2]
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Net Sales	0	[1],[3]	0	[1],[3]	0	[1],[3]	0	[1],[3]
Income Before Income Taxes	$ 1.9	[2],[3]	$ 2.4	[2],[3]	$ 1.4	[2],[3]	$ 7.3	[2],[3]

[1] Intersegment sales from Consumer International to Consumer Domestic were $0.7 million and $0.1 million for the quarters ended September 30, 2013 and September 30, 2012, respectively, and were $1.9 million and $1.9 million for the nine months ended September 30, 2013 and September 30, 2012, respectively.

[2] In determining Income before Income Taxes, interest expense, investment earnings and other income (expense) were allocated among the segments based upon each segment's relative operating profit.

[3] Corporate consists of equity in earnings (losses) of affiliates from Armand, ArmaKleen and Natronx.