Long-Term Employee Benefits (Defined Contribution Plan) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
US Retirement Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
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
U.S. Defined Contribution Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 212	$ 210	$ 195
Other Defined Contribution Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	124	84	59
Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	30	29	32
Defined Contribution Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan Estimated Future Employer Contributions In Next Fiscal Year	$ 320