Basis of Presentation (Unaudited) (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Net earnings	$ 602	$ 516	$ 1,675	$ 1,531
Net Cash Provided by (Used in) Operating Activities			1,282	529
Net Cash Provided by (Used in) Financing Activities			(1,893)	$ (2,802)
New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Net earnings	$ 1		85
Net Cash Provided by (Used in) Operating Activities			85
Net Cash Provided by (Used in) Financing Activities			$ (85)