Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Consolidated Balance Sheets [Abstract]
Doubtful accounts and allowances	$ 62	$ 59
Inventory reserves	156	151
Accumulated depreciation	$ 10,511	$ 9,884
Convertible preferred stock, par value (in dollars per share)	$ 100	$ 100
Convertible preferred stock, shares authorized (in shares)	3,100	3,100
Convertible preferred stock, shares issued (in shares)	2,300	2,300
Common stock, par value (in dollars per share)	$ 0.50	$ 0.50
Common stock, shares authorized (in shares)	3,800,000,000	3,800,000,000
Common stock, shares issued (in shares)	1,705,000,000	1,691,000,000
Treasury stock, shares held (in shares)	803,000,000	765,000,000