Contingencies (Trial Results Narrative) (Details) (Since January 1999 [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
	Apr. 23, 2012	Mar. 31, 2012
Since January 1999 [Member]
Loss Contingencies [Line Items]
Number of verdicts returned		51
Verdicts returned in favor of defendants		34
Verdicts returned in favor of plaintiffs		17
Cases reaching final resolution		15
Judgments paid	$ 240.0
Judgment interest paid aggregate	$ 139.0