Contingent liabilities and commitments (Details) $ in Millions	Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Guarantee of indebtedness, relating to unused letters of credit	$ 4.9
Escrow account deposit
Loss Contingencies [Line Items]
Contingent liability, escrow deposit	1,900.0
Escrow account deposit - Section 1031 Exchange
Loss Contingencies [Line Items]
Contingent liability, escrow deposit	$ 770.1

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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