Unaudited Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions	Total	Additional Paid-In Capital	Accumulated Earnings (Deficit)	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Common Stock	Ordinary Class A	Ordinary Class B	Class A	Class C
Beginning Balance at Dec. 31, 2018	$ 196.4	$ 291.4	$ (69.9)	$ (1.5)	$ (23.6)	$ 0.0
Beginning Balance (Shares) at Dec. 31, 2018						995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3.2)		(3.2)
Other comprehensive income (loss)	(3.4)				(3.4)
Ending Balance at Mar. 31, 2019	189.8	291.4	(73.1)	(1.5)	(27.0)	$ 0.0
Ending Balance (Shares) at Mar. 31, 2019						995
Beginning Balance at Dec. 31, 2018	196.4	291.4	(69.9)	(1.5)	(23.6)	$ 0.0
Beginning Balance (Shares) at Dec. 31, 2018						995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(19.0)
Other comprehensive income (loss)	(4.0)
Ending Balance at Jun. 02, 2019	173.4	291.4	(88.9)	(1.5)	(27.6)	$ 0.0
Ending Balance (Shares) at Jun. 02, 2019						0
Beginning Balance at Mar. 31, 2019	189.8	291.4	(73.1)	(1.5)	(27.0)	$ 0.0
Beginning Balance (Shares) at Mar. 31, 2019						995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of Ranpak Corp.	0.0
Purchase of Ranpak Corp. (shares)						(995)
Net loss	(15.8)		(15.8)
Other comprehensive income (loss)	(0.6)				(0.6)
Ending Balance at Jun. 02, 2019	173.4	291.4	(88.9)	$ (1.5)	(27.6)	$ 0.0
Ending Balance (Shares) at Jun. 02, 2019						0
Beginning Balance at Jun. 03, 2019	5.0	16.9	(11.9)
Beginning Balance (Shares) at Jun. 03, 2019							2,770,967	11,250,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Forward purchase shares	0.0
Forward purchase shares (shares)							15,000,000
Additional shares purchased	0.0
Additional shares purchased (shares)							16,149,317
Conversion of forward purchase and additional shares	267.0	267.0
Conversion of forward purchase and additional shares (shares)							(31,149,317)		25,454,282	5,695,035
Shares canceled	(33.0)	(33.0)
Shares canceled (shares)								(3,854,664)
Convert Class B	63.4	63.4
Convert Class B (shares)								(7,395,336)	6,663,953	731,383
Convert public shares	125.0	125.0
Convert public shares (shares)									14,581,346
Convert private placement warrants	6.4	6.4
Convert private placement warrants (shares)									658,051	84,875
Public shares redeemed	0.0
Public shares redeemed (shares)							(2,770,967)
Amortization of restricted stock units	0.2	0.2
Other	(2.6)	(2.6)
Net loss	(12.4)		(12.4)
Other comprehensive income (loss)	2.3				2.3
Ending Balance at Jun. 30, 2019	421.3	443.3	(24.3)		2.3
Ending Balance (Shares) at Jun. 30, 2019									47,357,632	6,511,293
Beginning Balance at Jun. 03, 2019	5.0	16.9	(11.9)
Beginning Balance (Shares) at Jun. 03, 2019							2,770,967	11,250,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(13.9)
Other comprehensive income (loss)	(6.3)
Ending Balance at Sep. 30, 2019	410.2	444.9	(25.9)		(8.8)
Ending Balance (Shares) at Sep. 30, 2019									47,361,352	6,511,293
Beginning Balance at Jun. 30, 2019	421.3	443.3	(24.3)		2.3
Beginning Balance (Shares) at Jun. 30, 2019									47,357,632	6,511,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue Director shares	0.0
Issue Director shares (shares)									3,720
Amortization of restricted stock units	1.6	1.6
Net loss	(1.6)		(1.6)
Other comprehensive income (loss)	(11.1)				(11.1)
Ending Balance at Sep. 30, 2019	410.2	444.9	(25.9)		(8.8)
Ending Balance (Shares) at Sep. 30, 2019									47,361,352	6,511,293
Beginning Balance at Dec. 31, 2019	$ 531.8	557.5	(29.1)		3.4
Beginning Balance (Shares) at Dec. 31, 2019	70,805,034								64,293,741	6,511,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based awards vested and distributed	$ 0.0
Stock-based awards vested and distributed (shares)									51,603
Issue Director shares	0.0
Issue Director shares (shares)									6,903
Amortization of restricted stock units	2.2	2.2
Net loss	(3.6)		(3.6)
Other comprehensive income (loss)	(11.8)				(11.8)
Ending Balance at Mar. 31, 2020	518.6	559.7	(32.7)		(8.4)
Ending Balance (Shares) at Mar. 31, 2020									64,352,247	6,511,293
Beginning Balance at Dec. 31, 2019	$ 531.8	557.5	(29.1)		3.4
Beginning Balance (Shares) at Dec. 31, 2019	70,805,034								64,293,741	6,511,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (18.2)
Other comprehensive income (loss)	(2.2)
Ending Balance at Sep. 30, 2020	$ 517.3	563.4	(47.3)		1.2
Ending Balance (Shares) at Sep. 30, 2020	75,502,448								68,991,155	6,511,293
Beginning Balance at Mar. 31, 2020	$ 518.6	559.7	(32.7)		(8.4)
Beginning Balance (Shares) at Mar. 31, 2020									64,352,247	6,511,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based awards vested and distributed	0.0
Stock-based awards vested and distributed (shares)									143,048
Issue Director shares	0.0
Issue Director shares (shares)									61,164
Amortization of restricted stock units	2.0	2.0
Net loss	(8.5)		(8.5)
Other comprehensive income (loss)	1.8				1.8
Ending Balance at Jun. 30, 2020	513.9	561.7	(41.2)		(6.6)
Ending Balance (Shares) at Jun. 30, 2020									64,556,459	6,511,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Warrant exchange	0.0
Warrant exchange (Shares)									4,422,564
Stock-based awards vested and distributed (shares)									2,048
Issue Director shares (shares)									10,084
Amortization of restricted stock units	1.7	1.7
Net loss	(6.1)		(6.1)
Other comprehensive income (loss)	7.8				7.8
Ending Balance at Sep. 30, 2020	$ 517.3	$ 563.4	$ (47.3)		$ 1.2
Ending Balance (Shares) at Sep. 30, 2020	75,502,448								68,991,155	6,511,293