Pension And Post-Retirement Benefits (Pension And Post-Retirement Benefits And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Defined Contribution Plan, Cost Recognized	$ 5	$ 3	$ 12	$ 5
Retiree medical liability	48		48		47
Pension liability	86		86		91
Subtotal	134		134		138
Less: current portion (included in other current liabilities)	(3)		(3)		(3)
Pension and post-retirement benefits	$ 131		$ 131		$ 135