Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 61	$ 67	$ 181	$ 206
Interest cost	290	272	875	816
Expected return on plan assets	(405)	(379)	(1,211)	(1,139)
Amortization of loss (gain)	151	244	450	724
Amortization of prior service cost (benefit)	1	2	2	8
Curtailment (gain) loss	0	0	4	1
Settlement loss	2	0	4	152
Net periodic benefit cost	100	206	305	768
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	7	13	23
Interest cost	30	32	91	98
Amortization of loss (gain)	15	26	43	51
Amortization of prior service cost (benefit)	(54)	(48)	(160)	(142)
Curtailment (gain) loss	0	0	0	(154)
Settlement loss	0	0	0	1
Net periodic benefit cost	$ (5)	$ 17	$ (13)	$ (123)