Pension and Post-Retirement Benefits - Components of the Net Periodic Benefit Costs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
United States
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 0	$ 10	$ 8
Interest cost	6	7	7
Expected return on plan assets	(11)	(11)	(11)
Amortization	1	5	5
Settlement loss	1	0	0
Net periodic benefit cost	(3)	11	9
International
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	9	8	9
Interest cost	8	9	9
Expected return on plan assets	(11)	(10)	(10)
Amortization	4	4	2
Settlement loss	0	0	0
Net periodic benefit cost	10	11	10
Post-Retirement Medical Benefit Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	1	1	1
Interest cost	1	2	3
Expected return on plan assets	0	0	0
Amortization	(1)	(1)	(1)
Settlement loss	0	0	0
Net periodic benefit cost	$ 1	$ 2	$ 3