Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified			9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 U.S. Pension and Postretirement Plans [Member]	Sep. 30, 2012 International Pension and Postretirement Plans [Member]
Employer's expected minimum contribution			$ 50	$ 40
Employer's expected maximum contribution			55	45
Employer contribution			47	27
Estimated future employer contributions in next fiscal year minimum remaining			3	13
Estimated future employer contributions in next fiscal year maximum remaining			8	18
Healthcare Trust Assets for retirement	40
Healthcare trust assets	$ 34.1	$ 0