Segment Net Sales and Income Before Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting Information [Line Items]
Net Sales	$ 808.3	[1]	$ 787.6	[1]	$ 1,590.3	[1]	$ 1,566.9	[1]
Income Before Income Taxes	135.0	[2]	132.2	[2]	291.7	[2]	295.4	[2]
Operating Segments | Consumer Domestic
Segment Reporting Information [Line Items]
Net Sales	598.9	[1]	594.5	[1]	1,192.2	[1]	1,185.5	[1]
Income Before Income Taxes	107.7	[2]	113.3	[2]	234.6	[2]	247.2	[2]
Operating Segments | Consumer International
Segment Reporting Information [Line Items]
Net Sales	136.6	[1]	132.7	[1]	260.4	[1]	262.0	[1]
Income Before Income Taxes	14.3	[2]	15.8	[2]	32.5	[2]	37.5	[2]
Operating Segments | Specialty Products
Segment Reporting Information [Line Items]
Net Sales	72.8	[1]	60.4	[1]	137.7	[1]	119.4	[1]
Income Before Income Taxes	10.1	[2]	4.2	[2]	20.1	[2]	11.2	[2]
Corporate
Segment Reporting Information [Line Items]
Net Sales	0	[1],[3]	0	[1],[3]	0	[1],[3]	0	[1],[3]
Income Before Income Taxes	$ 2.9	[2],[3]	$ (1.1)	[2],[3]	$ 4.5	[2],[3]	$ (0.5)	[2],[3]

[1] Intersegment sales from Consumer International to Consumer Domestic were $0.3 and $0.3 for the quarters ended June 30, 2014 and June 30, 2013, respectively, and were $0.5 and $1.2 for the six months ended June 30, 2014 and June 30, 2013, respectively.

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

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