Discontinued Operations (Summarized Activity of Discontinued Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net sales	$ 0	$ 1,904	$ 2,469
Operating earnings	0	203	268
Gains (losses) on sales of investments and businesses, net	(24)	1,888	3
Earnings (loss) before income taxes	(24)	2,074	266
Income tax expense	6	78	100
Earnings (loss) from discontinued operations, net of tax	$ (30)	$ 1,996	$ 166