Pension and Other Employee Benefits (Schedule of Components of Net Periodic Benefit Expense (Income) Pension) (Details) (Pension Plans [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Service cost	$ 579	$ 516	$ 471
Interest cost	996	1,047	1,069
Expected return on plan assets	(1,495)	(1,422)	(1,272)
Amounts reflected in net funded status	80	141	268
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	9	10	11
Recognized net actuarial loss	1,150	939	792
Loss due to curtailments/settlements	1	3	2
Amounts reclassified during the year	1,160	952	805
Net periodic cost (credit)	$ 1,240	$ 1,093	$ 1,073