Pension and Post-Retirement Benefits - Expected Employer Contributions and Benefit Payments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
United States
Pension and Other Postretirement Benefit Contributions [Abstract]
Expected employer contributions	$ 0
Expected benefit payments for year ending December 31st
2013	12
2014	14
2015	14
2016	15
2017	15
Next 5 years	83
International
Pension and Other Postretirement Benefit Contributions [Abstract]
Expected employer contributions	8
Expected benefit payments for year ending December 31st
2013	5
2014	5
2015	5
2016	6
2017	6
Next 5 years	39
Post-Retirement Medical Benefit Plans
Pension and Other Postretirement Benefit Contributions [Abstract]
Expected employer contributions	2	[1]
Expected benefit payments for year ending December 31st
2013	2	[1]
2014	2	[1]
2015	2	[1]
2016	3	[1]
2017	3	[1]
Next 5 years	13	[1]
Expected Medicare Subsidy Receipts
Expected benefit payments for year ending December 31st
2013	0
2014	0
2015	0
2016	0
2017	0
Next 5 years	$ 2

[1] Expected payments for Post-Retirement Medical Benefit Plans are shown net of the expected Medicare subsidy receipts.