Employee Retirement Benefits (Reconciliation Of The Funded Status For Qualified Plan And SERP) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Plan, Funded Status of Plan	$ 4	$ 0
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(8)	(82)
Defined Benefit Plan, Amounts Recognized in Balance Sheet	(4)	(82)
Amounts recognized in accumulated other comprehensive income not yet recognized:
Net actuarial loss	18	100
Prior service cost	0	1
Total	$ 18	$ 101	$ 88	$ 63