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Derivative financial instruments - Narrative (Details)
$ in Billions
Dec. 31, 2021
USD ($)
derivativeContract
Senior Secured Credit Facilities  
Derivative [Line Items]  
Notional amount $ 0.8
Interest rate swaps  
Derivative [Line Items]  
Number of interest rate swap contracts | derivativeContract 2
Fixed rate 2.85%
Interest Rate Swap One  
Derivative [Line Items]  
Notional amount $ 0.2
Interest Rate Swap Two  
Derivative [Line Items]  
Notional amount $ 0.6