Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets
Allowances for doubtful accounts	$ 43.0	$ 42.2
Accumulated depreciation and amortization	$ 558.6	$ 526.9
Diebold Nixdorf, Incorporated shareholders' equity
Preferred Stock, No 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	93,524,415	92,208,247
Common shares, shares outstanding	77,672,179	76,813,013
Treasury shares, at cost, shares	15,852,236	15,395,234