Employee Benefits (The Actuarially Determined Expense For U.S. And Non-U.S. Defined Benefit Plans, Post-Retirement Plan And SERPs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Primary U.S. And Non-U.S. Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 9	$ 11	$ 13
Interest cost	47	44	45
Assumed return on plan assets	(58)	(55)	(56)
Amortization of net loss	12	7	6
Net periodic benefit cost	10	7	8
Settlements			(1)
Curtailments			(1)
Special termination benefits
Total expense	10	7	6
Net loss	(17)	(13)	(7)
Estimated amortization	(17)	(13)	(7)
Post-Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	5	4
Interest cost	6	6	6
Assumed return on plan assets
Amortization of net loss	1	2	1
Net periodic benefit cost	13	13	11
Settlements
Special termination benefits			1
Total expense	13	13	12
Net loss	(1)	(2)	(2)
Estimated amortization	(1)	(2)	(2)
Non-Qualified SERPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	2
Interest cost	8	10	10
Amortization of net loss	3	5	3
Net periodic benefit cost	12	16	15
Total expense	19	24	19
Net loss	(5)	(3)	(5)
Estimated amortization	(5)	(3)	(5)
Other Pension Plans, Postretirement Or Supplemental Plans, Defined Benefit [Member] | Non-Qualified SERPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlements	$ 7	$ 8	$ 4