Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 1) (USD $) In Millions, unless otherwise specified			6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Qualified and Non-qualified Pension Benefits	Jun. 30, 2014 United States Qualified and Non-qualified Pension Benefits	Jun. 30, 2013 United States Qualified and Non-qualified Pension Benefits	Jun. 30, 2014 United States Qualified and Non-qualified Pension Benefits	Jun. 30, 2013 United States Qualified and Non-qualified Pension Benefits	Jun. 30, 2014 International Qualified and Non-qualified Pension Benefits	Jun. 30, 2013 International Qualified and Non-qualified Pension Benefits	Jun. 30, 2014 International Qualified and Non-qualified Pension Benefits	Jun. 30, 2013 International Qualified and Non-qualified Pension Benefits	Jun. 30, 2014 Postretirement Benefits	Jun. 30, 2013 Postretirement Benefits	Jun. 30, 2014 Postretirement Benefits	Jun. 30, 2013 Postretirement Benefits
Change in benefit obligation
Service cost				$ 60	$ 64	$ 120	$ 128	$ 35	$ 36	$ 71	$ 72	$ 17	$ 20	$ 33	$ 40
Interest cost				169	149	338	299	65	61	129	122	24	22	48	44
Change in plan assets
Company contributions			74											3
Amounts recognized in the Consolidated Balance Sheet
Non-current assets	672	577
Accrued benefit cost
Non-current liabilities	$ (1,829)	$ (1,794)