Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Current assets
Allowances for doubtful accounts	$ 38.2	$ 35.3
Accumulated depreciation and amortization	$ 500.9	$ 494.3
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	95,565,609	94,599,742
Common shares, shares outstanding	78,927,653	78,352,333
Treasury shares, at cost, shares	16,637,956	16,247,409