Face (par) amount of debt instrument at time of issuance.

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Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt - 2013 Issuances (Details) - Unsecured debt	Dec. 31, 2022	Dec. 31, 2021	Oct. 31, 2013 EUR (€) tranche	Jun. 30, 2012 EUR (€) tranche
Line of Credit Facility [Line Items]
Debt instrument, face amount			€ 355,000,000	€ 325,000,000
Number of tranches \| tranche			3	3
3.75% 2013 Private placement notes due 2033
Line of Credit Facility [Line Items]
Debt instrument, face amount			€ 100,000,000
Interest rate, stated percentage	3.75%	3.75%	3.75%
3.15% 2013 Private placement notes due 2023
Line of Credit Facility [Line Items]
Debt instrument, face amount			€ 130,000,000
Interest rate, stated percentage	3.15%	3.15%	3.15%
3.15% 2013 Private placement notes due 2023
Line of Credit Facility [Line Items]
Debt instrument, face amount			€ 125,000,000
Interest rate, stated percentage			3.15%