Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Trade receivables, reserves	$ 19	$ 21
Preferred stock, par value (in dollars per share)	$ 1.00
Preferred stock, shares outstanding (in shares)	100,000	0
Common stock, per share par value (in dollars per share)	$ 0.20	$ 0.20
Common stock, authorized shares (in shares)	1,100,000,000	1,100,000,000
Common stock, issued shares (in shares)	1,044,434,893	895,115,637
Treasury stock, shares (in shares)	150,323,151	145,726,051