Employee Benefit Plans Postretirement (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Net benefit cost	$ 2	$ 9	$ 1	$ 16
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Estimated Total Employer Contributions in Current Fiscal Year	4		4
Interest cost	0	0	0	0
Prior service cost (benefit)	(4)	(4)	(9)	(9)
Defined Benefit Plan, Actuarial Gain (Loss)	0	(1)	(1)	(2)
Net benefit cost	(4)	(3)	(8)	(7)
Defined Benefit Plan, Contributions by Employer	1		2
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year			$ 2