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Long-term debt and interest and other costs - Estimated Fair Value of Eurobonds (Detail) - Eurobonds - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Principal amount € 4,500.0 € 4,500.0
Carrying amount 4,235.8 4,542.4
Long-term debt 4,072.8 4,673.9
Amortized Costs Eurobonds    
Debt Instrument [Line Items]    
Carrying amount 4,479.0 4,478.5
Fair Value Adjustment Interest Rate Swaps    
Debt Instrument [Line Items]    
Carrying amount € (243.2) € 63.9