Employee Benefit Plans Postemployment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Net benefit cost	$ 0	$ (1)
Postemployment Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	4	4
Interest cost	1	2
Prior service cost (benefit)	(1)	(1)
Defined Benefit Plan Gross Periodic Benefit Cost	4	5
Severance Costs	(2)	0
Net benefit cost	2	5
Defined Benefit Plan, Contributions by Employer	11
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	69
Defined Benefit Plan Estimated Total Employer Contributions in Current Fiscal Year	$ 80