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Loans and Other Borrowings - Summary of Loans and Other Borrowings (Parenthetical) (Detail)
€ in Millions, £ in Millions
12 Months Ended
Dec. 31, 2023
EUR (€)
Dec. 31, 2023
GBP (£)
Dec. 31, 2022
EUR (€)
Dec. 31, 2022
GBP (£)
EUR500m 1.625% bonds 2024 [member]        
Disclosure of detailed information about borrowings [line items]        
Notional amount | € € 500   € 500  
Bond interest rate 1.625% 1.625% 1.625% 1.625%
Maturity date 8 October 2024      
GBP300m 3.75% bonds 2025 [member]        
Disclosure of detailed information about borrowings [line items]        
Notional amount | £   £ 300   £ 300
Bond interest rate 3.75% 3.75% 3.75% 3.75%
Maturity date 14 August 2025      
GBP350m 2.125% bonds 2026 [member]        
Disclosure of detailed information about borrowings [line items]        
Notional amount | £   £ 350   £ 350
Bond interest rate 2.125% 2.125% 2.125% 2.125%
Maturity date 24 August 2026      
EUR500m 2.125% bonds 2027 [member]        
Disclosure of detailed information about borrowings [line items]        
Notional amount | € € 500   € 500  
Bond interest rate 2.125% 2.125% 2.125% 2.125%
Maturity date 15 May 2027      
GBP400m 3.375% bonds 2028 [member]        
Disclosure of detailed information about borrowings [line items]        
Notional amount | £   £ 400   £ 400
Bond interest rate 3.375% 3.375% 3.375% 3.375%
Maturity date 8 October 2028      
EUR600m 4.375% bonds 2029 [member]        
Disclosure of detailed information about borrowings [line items]        
Notional amount | € € 600      
Bond interest rate 4.375% 4.375%    
Maturity date 28 November 2029