Commitments And Contingencies (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Commitments and Contingencies [Line Items]
Sites identified which we are or may be liable for remediation costs	274
Sites subject of actions taken by the U.S. government	29
Sites on the Superfund National Priorities List	16
Future minimum lease payments	$ 3,600,000,000
Personal Injury [Member]
Commitments and Contingencies [Line Items]
Percent of liability recorded related to asserted claims	93.00%
Percent of liability recorded related to unasserted claims	7.00%
Reasonably possible outcome of related claims, range minimum	299,000,000
Reasonably possible outcome of related claims, range maximum	327,000,000
Asbestos [Member]
Commitments and Contingencies [Line Items]
Percent of liability recorded related to asserted claims	22.00%
Percent of liability recorded related to unasserted claims	78.00%
Guarantees [Member]
Commitments and Contingencies [Line Items]
Maximum potential amount of guarantee payments	78,000,000	82,000,000
Recorded liability for fair value of guarantees	$ 5,200,000	$ 300,000
Expiration year of final guarantee	The final guarantee expires in 2022