Commitments and Contingent Liabilities (Accretion Of Future Funding Obligation) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Line Items]
Total obligation	$ 942
Asbestos litigation reserve current	703	683
Asbestos litigation reserve noncurrent	239	237
Total	102
Asbestos Issue [Member]
Commitments and Contingencies Disclosure [Line Items]
Remainder of 2012	7
2013	14
2014-2023	81
Total	$ 102