Commitments and Contingent Liabilities (Accretion Of Future Funding Obligation) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Line Items]
Total obligation	$ 888
Asbestos litigation reserve current	654	593
Asbestos litigation reserve noncurrent	234	241
Total	113
Asbestos Issue [Member]
Commitments and Contingencies Disclosure [Line Items]
Asbestos litigation reserve noncurrent	5
Remainder of 2012	4
2013	14
2014-2023	95
Total	$ 113