Supplemental Comprehensive Income (Loss) Information (Details 1) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrecognized pension and other retiree benefit costs, aftertax	$ 868	$ 1,064
Foreign currency translation adjustments	$ 3,087	$ 2,453