Employee Benefit Plans (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
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 0	$ 0	$ 0	$ 0
Interest Cost	232	215	464	430
Expected Return on Plan Assets	(207)	(184)	(414)	(368)
Amortization of Prior Service Benefit	0	0	0	0
Recognized net actuarial loss	33	55	67	111
Settlements			0	6
Net periodic cost	58	86	117	179
Other Postretirement and Postemployment Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	13	12	26	24
Interest Cost	39	36	78	72
Expected Return on Plan Assets	(21)	(21)	(42)	(42)
Amortization of Prior Service Benefit	(7)	(7)	(14)	(14)
Recognized net actuarial loss	1	6	2	12
Settlements			0	0
Net periodic cost	$ 25	$ 26	$ 50	$ 52