Long-Term Employee Benefits Defined Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Aug. 31, 2012
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Curtailment charge	$ 2	$ 0	$ 2	$ 0
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.10%		4.10%		4.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.75%		8.75%		9.00%
defined benefit plan, curtailment and remeasurement						609
Amortization of prior service cost (benefit)	3	4	10	12
Update for plan amendment [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.00%		4.00%		4.50%
Defined Benefit Plan, Effect of Plan Amendment on Accumulated Benefit Obligation	700		700
Defined Benefit Plan, Actuarial Gain (Loss)	138		138
Amortization of prior service cost (benefit)	838		838
Reduction to Other Long Term Employee Benefit Expense	$ 18		$ 18