Long-Term Employee Benefits (Schedule of Amounts Recognized in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss	$ (10,803)	$ (12,164)
Prior service benefit	54	59
Pre-tax amounts recognized in accumulated other comprehensive loss	(10,749)	(12,105)
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss	(787)	(870)
Prior service benefit	811	1,269
Pre-tax amounts recognized in accumulated other comprehensive loss	$ 24	$ 399