Acquisitions and Divestitures - Schedule of Business Acquisitions by Acquisition, Fair Value of Consideration Transferred (Details) - USD ($) $ in Millions	Jul. 19, 2021	Jun. 03, 2023	May 28, 2022
Business Acquisition [Line Items]
Shares of Knoll Common Stock issued and outstanding (in shares)		75,698,670	75,824,241
Shares of Knoll common stock issued and outstanding (in shares)		75,698,670	75,824,241
Shares of Knoll Preferred Stock issued and outstanding (in shares)		0	0
Restricted stock awards
Business Acquisition [Line Items]
Knoll equivalent shares for outstanding awards of restricted common stock held by non-employee directors and outstanding awards of performance units held by individuals who are former employees of Knoll and remain eligible to vest (in shares)		34,743	219,989
Knoll
Business Acquisition [Line Items]
Consideration for payment to settle Knoll's outstanding debt	$ 376.9
Total number of Knoll shares for share consideration (in shares)	15,843,921
Total number of Knoll shares for share consideration	$ 688.3
Outstanding awards of Knoll Restricted Stock and Performance units relating to Knoll Common Stock	22.4
Total acquisition date fair value of consideration transferred	$ 1,887.3
Knoll
Business Acquisition [Line Items]
Shares of Knoll Common Stock issued and outstanding (in shares)	49,444,825
Shares of Knoll common stock issued and outstanding (in shares)	49,444,825
Shares of Knoll Common Stock issued and outstanding	$ 543.9
Knoll equivalent shares for outstanding option awards, outstanding awards of restricted common stock held by non-employee directors and outstanding awards of performance units held by individuals who are former employees of Knoll and remain eligible to vest (in shares)	184,857
Knoll equivalent shares for outstanding option awards, outstanding awards of restricted common stock held by non-employee directors and outstanding awards of performance units held by individuals who are former employees of Knoll and remain eligible to vest	$ 1.4
Total number of Knoll shares for cash consideration (in shares)	49,629,682
Shares of Knoll Preferred Stock issued and outstanding (in shares)	169,165
Shares of Knoll Preferred Stock issued and outstanding (in shares)	169,165
Shares of Knoll Preferred Stock issued and outstanding	$ 254.4
Total number of Knoll shares for share consideration (in shares)	49,519,682
Knoll | Restricted stock awards
Business Acquisition [Line Items]
Knoll equivalent shares for outstanding awards of restricted common stock held by non-employee directors and outstanding awards of performance units held by individuals who are former employees of Knoll and remain eligible to vest (in shares)	74,857