Retirement Plans and Other Retiree Benefits (Details 6) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
2012 Restructuring Program
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Restructuring Reserve, Charges Against Assets	$ 42	$ 31	$ 44
Defined Benefit Plan, Curtailments	0	0	91
Other Restructuring | 2012 Restructuring Program
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Restructuring Reserve, Charges Against Assets	0	0	0
Defined Benefit Plan, Curtailments	0	0	91
One-time Termination Benefits [Member] | 2012 Restructuring Program
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Restructuring Reserve, Charges Against Assets	17	5	17
Defined Benefit Plan, Curtailments	0	0	0
United States Pension Plan of US Entity [Member]
Components of Net Periodic Benefit Cost
Defined Benefit Plan, Service Cost	2	1	24
Interest cost	100	102	90
Annual ESOP allocation	0	0	0
Expected return on plan assets	(117)	(112)	(118)
Amortization of transition and prior service costs (credits)	0	1	9
Amortization of actuarial loss	44	37	68
Net periodic benefit cost	29	29	73
Other postretirement charges	16	5	102
Total pension cost	$ 45	$ 34	$ 175
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Discount Rate	4.24%	4.96%	4.14%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.80%	6.80%	7.30%
Long-term rate of compensation increase	3.50%	3.50%	3.50%
ESOP growth rate	0.00%	0.00%	0.00%
Defined Benefit Plan Assumptions Used Calculating Net Periodic Medical Cost Trend Rate	0.00%	0.00%	0.00%
Voluntary contributions to postretirement plans	$ 0	$ 2	$ 101
International Pension Benefits [Member]
Components of Net Periodic Benefit Cost
Defined Benefit Plan, Service Cost	20	17	19
Interest cost	28	35	34
Annual ESOP allocation	0	0	0
Expected return on plan assets	(28)	(29)	(26)
Amortization of transition and prior service costs (credits)	2	4	2
Amortization of actuarial loss	11	6	10
Net periodic benefit cost	33	33	39
Other postretirement charges	(1)	(8)	3
Total pension cost	$ 32	$ 25	$ 42
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Discount Rate	3.06%	3.99%	3.57%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	5.05%	5.50%	5.39%
Long-term rate of compensation increase	2.83%	3.02%	2.80%
ESOP growth rate	0.00%	0.00%	0.00%
Defined Benefit Plan Assumptions Used Calculating Net Periodic Medical Cost Trend Rate	0.00%	0.00%	0.00%
Other Retiree Benefit Plans [Member]
Components of Net Periodic Benefit Cost
Defined Benefit Plan, Service Cost	$ 14	$ 11	$ 13
Interest cost	44	42	38
Annual ESOP allocation	0	(1)	(2)
Expected return on plan assets	(2)	(3)	(3)
Amortization of transition and prior service costs (credits)	0	3	1
Amortization of actuarial loss	25	16	21
Net periodic benefit cost	81	68	68
Other postretirement charges	1	0	6
Total pension cost	$ 82	$ 68	$ 74
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Discount Rate	4.36%	5.24%	4.32%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.80%	6.80%	7.30%
Long-term rate of compensation increase	0.00%	0.00%	0.00%
ESOP growth rate	10.00%	10.00%	10.00%
Defined Benefit Plan Assumptions Used Calculating Net Periodic Medical Cost Trend Rate	7.00%	7.00%	7.50%