Employee Benefit Plans Postemployment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended			6 Months Ended		0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Postemployment Benefit Plans Defined Benefit [Member]	Jun. 30, 2013 Postemployment Benefit Plans Defined Benefit [Member]	Mar. 31, 2013 Postemployment Benefit Plans Defined Benefit [Member]	Jun. 30, 2014 Postemployment Benefit Plans Defined Benefit [Member]	Jun. 30, 2013 Postemployment Benefit Plans Defined Benefit [Member]	Jul. 29, 2014 Subsequent Event [Member] Postemployment Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost					$ 3	$ 8		$ 7	$ 12
Interest cost					2	2		4	4
Prior service cost (benefit)					(1)	(1)		(2)	(2)
Defined Benefit Plan, Actuarial Gain (Loss)					0	0		0	(1)
Defined Benefit Plan, Curtailments					0	0		0	(13)
Net benefit cost	2	9	1	16	4	9		9	2
Benefit For Reduction In Actuarial Liability							48
Defined Benefit Plan, Contributions by Employer					5			10		50
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year								25
Defined Benefit Plan Estimated Total Employer Contributions in Current Fiscal Year					$ 35			$ 35