Retirement Plans and Other Retiree Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
United States Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Voluntary benefit plan contribution			$ 0	$ 0
Components of net periodic benefit cost
Service Cost	$ 1	$ 1	1	1
Interest cost	25	26	50	51
ESOP Offset	0	0	0	0
Expected return on plan assets	(29)	(29)	(58)	(56)
Amortization of transition and prior service costs (credits)	0	0	0	0
Amortization of actuarial loss (gain)	12	8	24	16
Net periodic benefit cost	9	6	17	12
International Pension Benefits [Member]
Components of net periodic benefit cost
Service Cost	5	5	10	10
Interest cost	7	9	15	18
ESOP Offset	0	0	0	0
Expected return on plan assets	(6)	(8)	(14)	(15)
Amortization of transition and prior service costs (credits)	1	2	1	3
Amortization of actuarial loss (gain)	2	0	5	1
Net periodic benefit cost	9	8	17	17
Other Retiree Benefits [Member]
Components of net periodic benefit cost
Service Cost	4	3	8	6
Interest cost	12	11	23	21
ESOP Offset	(1)	(1)	(1)	(1)
Expected return on plan assets	0	(1)	(1)	(1)
Amortization of transition and prior service costs (credits)	0	0	0	0
Amortization of actuarial loss (gain)	7	4	14	8
Net periodic benefit cost	$ 22	$ 16	$ 43	$ 33