Basis of Presentation (Unaudited) (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Additional Contract Sales Assumed	$ 225
Request for Equitable Adjustment	300
Accumulated Other Comprehensive Loss
Unamortized benefit plan costs, net of tax benefit of $3,288 as of March 31, 2016 and $3,350 as of December 31, 2015	(5,140)		$ (5,241)
Cumulative translation adjustment	(86)		(82)
Net unrealized gain on marketable securities and cash flow hedges, net of tax	2		3
Total accumulated other comprehensive loss	(5,224)		(5,320)
Unamortized benefit plan costs - Tax Benefit (expense)	3,288		3,350
Unamortized benefit plan costs, net actuarial losses, after-tax	5,300		$ 5,500
Unamortized benefit plan costs, reclassified from other comprehensive income to net earnings	$ 101	$ 96