Pension And Post-Retirement Benefits (Pension And Post-Retirement Benefits And Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Retiree medical liability	$ 21	$ 22
Pension liability	84	83
Subtotal	105	105
Less: current portion (included in other current liabilities)	(2)	(2)
Pension and post-retirement benefits liabilities	$ 103	$ 103