Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Concentrations of Risk - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Concentration Risk [Line Items]
Accounts receivable, net, current	$ 879.5		$ 845.6
Office Depot \| Credit Concentration Risk
Concentration Risk [Line Items]
Accounts receivable, net, current	$ 56.8		$ 76.2
Office Depot \| Total Company Sales Revenue \| Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	5.00%	7.00%
Office Depot \| Total Company Receivables \| Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	6.00%		9.00%
Paper \| Office Depot \| Paper Segment Sales Revenue \| Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	43.00%	52.00%	50.00%