Basis Of Presentation Basis of Presentation (Restructuring) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 15	$ 0	$ 15	$ 0
Restructuring and Related Cost, Expected Cost Remaining	10		10
Restructuring and Related Cost, Expected Cost	25		25
Restructuring Reserve	12		12
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	16		16
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	6		6
Employee Relocation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	3		3
Cash [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			15
Deferred Compensation, Share-based Payments [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			1
Leasehold Improvements [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	2		2
Property Subject to Operating Lease [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 4		$ 4