Summary Of Significant Accounting Policies Summary of Significant Accounting Policies (Supplemental Cash Flow Information) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Cash Flow Information [Line Items]
Interest Paid, Net	$ 393	$ 433	$ 453
Income Taxes Paid, Net	8	1	(61)
Continuing Operations [Member]
Supplemental Cash Flow Information [Line Items]
Interest Paid, Capitalized	20	17	27
Interest Paid, Net	362	384	393
Income Taxes Paid, Net	116	10	(47)
Discontinued Operations [Member]
Supplemental Cash Flow Information [Line Items]
Interest Paid, Capitalized	17	13	3
Interest Paid, Net	31	49	60
Income Taxes Paid, Net	$ (108)	$ (9)	$ (14)