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, 2012	Dec. 31, 2011	Dec. 31, 2010
Primary U.S. And Non-U.S. Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 11	$ 9	$ 11
Interest cost	45	47	44
Assumed return on plan assets	(59)	(58)	(55)
Amortization of prior service cost	(2)	0	0
Amortization of net loss	17	12	7
Net periodic benefit cost	12	10	7
Special termination benefits	0	0	0
Total expense	12	10	7
Net loss	(24)	(17)	(13)
Estimated amortization	(24)	(17)	(13)
Post-Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	6	5
Interest cost	5	6	6
Assumed return on plan assets	0	0	0
Amortization of prior service cost	0	0	0
Amortization of net loss	1	1	2
Net periodic benefit cost	12	13	13
Special termination benefits	1	0	0
Total expense	13	13	13
Net loss	(2)	(1)	(2)
Estimated amortization	(2)	(1)	(2)
Non-Qualified SERPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1
Interest cost	7	8	10
Amortization of net loss	5	3	5
Net periodic benefit cost	13	12	16
Total expense	19	19	24
Net loss	(6)	(5)	(3)
Estimated amortization	(6)	(5)	(3)
Other Pension Plans, Postretirement Or Supplemental Plans, Defined Benefit [Member] | Non-Qualified SERPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlements	$ 6	$ 7	$ 8