Long-Term Debt (Loss from Early Extinguishment of Debt Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Extinguishment of Debt Disclosures [Abstract]
Loss from early extinguishment of debt	$ 9	$ 0	$ 16	$ 73
Loss on Extinguishment of Debt, Net of Tax	$ 6	$ 0	$ 10	$ 45