Income Taxes And Tax-Related Items Income Taxes And Tax-Related Items (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income before income taxes									$ 730	$ 710	$ 530
Foreign-source income									25
Provision for income taxes	35	54	50	50	55	36	50	48	189	189	137
Tax-related interest and penalties									1	0	7
Liability for tax-related interest and penalties	2				4				2	4
Reasonably possible change in unrecognized tax benefits in next 12 months	0								0
Unrecognized tax benefits that would impact the effective tax rate	2								2
Available-for-sale Securities
Provision for income taxes									$ 0	$ 4	$ 5