Significant accounting policies - Trade accounts receivable (Details) $ in Millions	12 Months Ended
Jan. 01, 2022 USD ($)
Accounting Policies [Abstract]
Trade account receivables held for sale	$ 106.9
Expenses related to the sales of receivables	$ 1.4

Amount, before valuation allowance, of accounts receivable held for sale.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

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