Goodwill and intangibles, net - Goodwill (Details) (USD $) In Millions	9 Months Ended
	Jun. 30, 2011
Goodwill [Roll Forward]
Balance at October 1, 2010	$ 1,316.4
ASR acquisition	105.9
Cumulative translation adjustment	8.0
Balance at June 30, 2011	1,430.3
Household Products [Member]
Goodwill [Roll Forward]
Balance at October 1, 2010	37.2
ASR acquisition	0
Cumulative translation adjustment	0.2
Balance at June 30, 2011	37.4
Personal Care [Member]
Goodwill [Roll Forward]
Balance at October 1, 2010	1,279.2
ASR acquisition	105.9
Cumulative translation adjustment	7.8
Balance at June 30, 2011	$ 1,392.9