Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets
Allowances for doubtful accounts	$ 55.3	$ 71.7
Accumulated depreciation and amortization	$ 513.5	$ 494.1
Diebold Nixdorf, Incorporated shareholders' equity
Preferred shares, par value	$ 0	$ 0
Preferred shares, shares authorized	1,000,000	1,000,000
Preferred shares, shares issued	0	0
Common shares, par value	$ 1.25	$ 1.25
Common shares, shares authorized	125,000,000	125,000,000
Common shares, shares issued	91,937,394	91,345,451
Common shares, shares outstanding	76,572,467	76,174,025
Treasury shares, at cost, shares	15,364,927	15,152,217