Contingencies (Trial Results Narrative) (Details) (Since January 1999 [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011
Since January 1999 [Member]
Number of verdicts returned	50
Verdicts returned in favor of defendants	33
Verdicts returned in favor of plaintiffs	17
Cases reaching final resolution	12
Cases reaching partial resolution	1
Judgments paid	$ 177.1
Judgment interest paid aggregate	$ 80.0