Commitments and Contingencies (Plumbing Actions Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
Loss Contingencies [Line Items]
Plumbing actions other (charges) gains	$ 4	$ 2	$ 4	$ 6
Advanced Engineered Materials [Member] | Plumbing Actions [Member]
Loss Contingencies [Line Items]
Plumbing actions other (charges) gains	4	2	4	6		59
Legal reserve reductions	$ 4	$ 2	$ 4	$ 4	$ 4