Employee Benefit Plans Postretirement (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Net benefit cost	$ 1	$ 5	$ 2	$ 21
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1	1	1
Prior service cost (benefit)	(4)	(5)	(13)	(14)
Defined Benefit Plan, Actuarial Gain (Loss)	0	0	(1)	(2)
Net benefit cost	(3)	(4)	(11)	(11)
Defined Benefit Plan, Contributions by Employer	0		2
Defined Benefit Plan Estimated Total Employer Contributions in Current Fiscal Year	4		4
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year			$ 2