Long-Term Employee Benefits (Defined Contribution Plan) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Contribution Plans [Member]
Expected contribution in next fiscal year	$ 335
U.S. Defined Contribution Plans [Member]
Employer contributions	210	195	191
Plan since January 1, 2008 [Member]
Percent of portion of employee's contribution matched by the employer	100.00%
Percent of employee's contribution which is fully matched	6.00%
Percent of eligible compensation contributed to defined contribution plan	3.00%
Requisite service period, years	three
Defined Contribution Pension [Member]
Employer contributions	$ 84	$ 59	$ 54