Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Condensed Consolidated Balance Sheets
Property, plant and equipment, Accumulated depreciation	$ 3,016	$ 2,915
Other intangible assets - accumulated amortization (in dollars)	$ 188	$ 167
Preferred stock, authorized (in shares)	25,000,000	25,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, issued (in shares)	0	0
Common stock, authorized (in shares)	200,000,000	200,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	77,810,875	77,810,875
Treasury stock (in shares)	11,052,615	11,284,681