Income Taxes (Unaudited) Income Taxes (Unaudited) (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Net earnings	$ 556	$ 484
New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Net earnings	$ 80