Retirement Plans and Other Retiree Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer			$ 101	$ 101
United States Pension Benefits [Member]
Components of net periodic benefit cost
Service Cost	6	4	20	18
Interest cost	22	24	68	73
ESOP Offset	0	0	0	0
Expected return on plan assets	(29)	(28)	(88)	(84)
Amortization of transition and prior service costs (credits)	1	2	6	7
Amortization of actuarial loss	17	17	49	46
Net periodic benefit cost	17	19	55	60
International Pension Benefits [Member]
Components of net periodic benefit cost
Service Cost	6	6	16	17
Interest cost	8	9	22	26
ESOP Offset	0	0	0	0
Expected return on plan assets	(7)	(7)	(19)	(19)
Amortization of transition and prior service costs (credits)	1	1	1	1
Amortization of actuarial loss	3	2	10	7
Net periodic benefit cost	11	11	30	32
Other Retiree Benefits [Member]
Components of net periodic benefit cost
Service Cost	3	2	10	8
Interest cost	8	9	28	30
ESOP Offset	0	0	(1)	(1)
Expected return on plan assets	(1)	(1)	(2)	(2)
Amortization of transition and prior service costs (credits)	0	0	0	2
Amortization of actuarial loss	5	5	16	13
Net periodic benefit cost	$ 15	$ 15	$ 51	$ 50