Pension And Post-Retirement Benefits (Components Of The Net Periodic Benefit Costs) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
U.S. Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 2	$ 4	$ 4
Interest cost	2	2	4	4
Expected return on plan assets	(2)	(2)	(5)	(5)
Amortization	1	1	2	2
Net periodic benefit cost	3	3	5	5
Pension Plans, International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	4	4
Interest cost	3	3	5	5
Expected return on plan assets	(3)	(3)	(5)	(5)
Amortization	1	1	2	1
Net periodic benefit cost	3	3	6	5
Post-Retirement Medical Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1	1
Interest cost	0	0	1	1
Expected return on plan assets	0	0	0	0
Amortization	(1)	(1)	(1)	(1)
Net periodic benefit cost	$ 0	$ 0	$ 1	$ 1