Employee Benefit Plans Postemployment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Net benefit cost	$ 1	$ 5		$ 2	$ 21
Postemployment Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	3	3		10	15
Interest cost	2	3		6	7
Prior service cost (benefit)	(1)	(2)		(3)	(4)
Defined Benefit Plan, Actuarial Gain (Loss)	0	(3)		0	(4)
Defined Benefit Plan, Curtailments	0	0		0	(13)
Defined Benefit Plan Gross Periodic Benefit Cost	4	7		13	9
Severance Costs	61	0		61	0
Net benefit cost	65	7		74	9
Benefit For Reduction In Actuarial Liability			48
Defined Benefit Plan, Contributions by Employer	9			19
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year				31
Defined Benefit Plan Estimated Total Employer Contributions in Current Fiscal Year	$ 50			$ 50