Pension Benefit Plans and Other Postretirement Benefits (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost
Tenure used for computing historical long-term rate of return assumption	10 years
U.S Pension Plans
Amortization:
Actuarial loss	$ 110,000,000
Net amortization	110,000,000
Projected Benefit Obligation Exceeds the Fair Value of Plan Assets
Projected benefit obligations	2,647,000,000	2,547,000,000
Fair value of plan assets	2,175,000,000	2,011,000,000
Accumulated benefit obligation	2,569,000,000	2,457,000,000
Accumulated Benefit Obligations Exceeds the Fair Value of Plan Assets
Projected benefit obligations	2,647,000,000	2,547,000,000
Fair value of plan assets	2,175,000,000	2,011,000,000
Accumulated benefit obligation	2,569,000,000	2,457,000,000
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent)	4.11%	4.59%
Rate of compensation increase (as a percent)	2.97%	3.14%
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent)	4.59%	5.24%	5.84%
Rate of compensation increase (as a percent)	3.14%	4.50%	5.00%
Expected long-term rate of return on assets (as a percent)	8.00%	8.00%	8.00%
Non-U.S. Pension Plans
Amortization:
Actuarial loss	32,000,000
Prior service cost	(1,000,000)
Net amortization	31,000,000
Projected Benefit Obligation Exceeds the Fair Value of Plan Assets
Projected benefit obligations	1,911,000,000	1,157,000,000
Fair value of plan assets	1,527,000,000	837,000,000
Accumulated benefit obligation	1,729,000,000	1,065,000,000
Accumulated Benefit Obligations Exceeds the Fair Value of Plan Assets
Projected benefit obligations	1,172,000,000	1,157,000,000
Fair value of plan assets	858,000,000	837,000,000
Accumulated benefit obligation	1,090,000,000	1,065,000,000
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent)	3.89%	4.75%
Rate of compensation increase (as a percent)	3.08%	3.23%
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent)	4.75%	5.28%	5.64%
Rate of compensation increase (as a percent)	3.23%	3.49%	3.54%
Expected long-term rate of return on assets (as a percent)	6.24%	6.44%	6.78%
U.S Postretirement Benefit Plans
Amortization:
Actuarial loss	4,000,000
Prior service cost	(7,000,000)
Net amortization	$ (3,000,000)
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent)	4.04%	4.47%	5.09%
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent)	4.47%	5.09%	5.68%
Non-U.S. Postretirement Benefit Plans
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent)	3.89%	4.13%	5.02%
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent)	4.13%	5.02%	5.60%