Retirement Plans and Other Retiree Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 0	$ 0
United States Pension Benefits [Member]
Components of net periodic benefit cost
Service Cost	0	7
Interest cost	25	23
Expected return on plan assets	(27)	(29)
Amortization of transition and prior service costs (credits)	0	2
Amortization of actuarial loss	8	16
Net periodic benefit cost	6	19
International Pension Benefits [Member]
Components of net periodic benefit cost
Service Cost	5	6
Interest cost	9	7
Expected return on plan assets	(7)	(6)
Amortization of transition and prior service costs (credits)	1	0
Amortization of actuarial loss	1	3
Net periodic benefit cost	9	10
Other Retiree Benefits [Member]
Components of net periodic benefit cost
Service Cost	3	4
Interest cost	10	10
Expected return on plan assets	0	(1)
Amortization of transition and prior service costs (credits)	0	0
Amortization of actuarial loss	4	5
Net periodic benefit cost	$ 17	$ 18