Environmental Environmental (US Superfund Sites Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011
Environmental Remediation Obligations [Abstract]
Number of Parties included in USEPA order	70
Number of Other Entities included in NJDEP Action, Greater Than	200
US Superfund Sites, NJDEP Suit, EPA Study Remedial Costs Estimate, High	$ 2,300,000,000
US Superfund Sites, NJDEP Suit, EPA Study Remedial Costs Estimate, Low	$ 900,000,000
US Superfund, Passaic River, Company Ultimate Contribution, Percentage Estimate	less than approximately 1% to 2%