Principles Of Consolidation And Other Matters (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Operating funds related to regulatory requirements or as collateral under captive insurance arrangements	$ 202,000,000		$ 202,000,000
Effective tax rate	29.60%	32.10%	28.90%	30.10%
Unrecognized tax benefits	105,000,000		105,000,000		128,000,000
Reasonably possible decrease in unrecognized tax benefits, lower bound	0		0
Reasonably possible decrease in unrecognized tax benefits, upper bound	$ 15,000,000		$ 15,000,000