Long-Term Employee Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 24,685	$ 27,243
Pre-tax net loss that will be amortized from accumulated other comprehensive income in next fiscal year	597
Pre-tax prior service cost/(credit) that will be amortized from accumulated other comprehensive income in next fiscal year	3
Net periodic benefit costs, discount rate	3.90%	4.32%	5.32%
Net periodic benefit costs, expected return on plan assets	8.39%	8.61%	8.73%
Rate of compensation increase	4.14%	4.18%	4.24%
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pre-tax net loss that will be amortized from accumulated other comprehensive income in next fiscal year	55
Pre-tax prior service cost/(credit) that will be amortized from accumulated other comprehensive income in next fiscal year	$ (212)
Net periodic benefit costs, discount rate	3.85%	4.49%	5.50%
Net periodic benefit costs, expected return on plan assets	0.00%	0.00%	0.00%
Rate of compensation increase	4.40%	4.40%	4.50%
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit costs, discount rate	4.10%	4.38%	5.50%
Net periodic benefit costs, expected return on plan assets	8.75%	8.96%	9.00%
Rate of compensation increase	4.40%	4.40%	4.50%