Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Trade receivables, allowances	$ 48	$ 58
Other receivables, allowances	$ 101	$ 93
Common Stock, no par value
Common stock, shares authorized	5,000,000,000	5,000,000,000
Common Stock, shares issued	1,996,537,778	1,996,537,778
Treasury stock, shares	501,158,385	468,172,237