Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 1) (USD $) In Millions, unless otherwise specified			9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Qualified and Non-qualified Pension Benefits	Sep. 30, 2014 United States Qualified and Non-qualified Pension Benefits	Sep. 30, 2013 United States Qualified and Non-qualified Pension Benefits	Sep. 30, 2014 United States Qualified and Non-qualified Pension Benefits	Sep. 30, 2013 United States Qualified and Non-qualified Pension Benefits	Sep. 30, 2014 International Qualified and Non-qualified Pension Benefits	Sep. 30, 2013 International Qualified and Non-qualified Pension Benefits	Sep. 30, 2014 International Qualified and Non-qualified Pension Benefits	Sep. 30, 2013 International Qualified and Non-qualified Pension Benefits	Sep. 30, 2014 Postretirement Benefits	Sep. 30, 2013 Postretirement Benefits	Sep. 30, 2014 Postretirement Benefits	Sep. 30, 2013 Postretirement Benefits
Change in benefit obligation
Service cost				$ 60	$ 64	$ 180	$ 192	$ 36	$ 37	$ 107	$ 109	$ 16	$ 20	$ 49	$ 60
Interest cost				169	150	507	449	65	61	194	183	24	22	72	66
Change in plan assets
Company contributions			107											5
Amounts recognized in the Consolidated Balance Sheet
Non-current assets	720	577
Accrued benefit cost
Non-current liabilities	$ (1,849)	$ (1,794)