Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 0	$ 0	$ 0	$ 0
Interest Cost	232	215	696	645
Expected Return on Plan Assets	(207)	(184)	(621)	(552)
Amortization of Prior Service Benefit	0	0	0	0
Recognized net actuarial loss	33	56	100	167
Settlements			0	6
Net periodic cost	58	87	175	266
Other Postretirement and Postemployment Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	13	12	39	36
Interest Cost	39	36	117	108
Expected Return on Plan Assets	(21)	(21)	(63)	(63)
Amortization of Prior Service Benefit	(6)	(7)	(20)	(21)
Recognized net actuarial loss	1	6	3	18
Settlements			0	0
Net periodic cost	$ 26	$ 26	$ 76	$ 78