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Debt - Text Details (Detail)
€ in Millions, $ in Billions
12 Months Ended
Dec. 31, 2023
EUR (€)
Dec. 31, 2022
EUR (€)
Dec. 31, 2023
USD ($)
Aug. 31, 2023
EUR (€)
Jun. 14, 2023
EUR (€)
Oct. 31, 2022
EUR (€)
Sep. 30, 2022
EUR (€)
Jun. 13, 2022
EUR (€)
Dec. 31, 2021
EUR (€)
Nov. 23, 2021
EUR (€)
Dec. 31, 2020
EUR (€)
Sep. 03, 2020
EUR (€)
Mar. 09, 2020
EUR (€)
Debt [Line Items]                          
Notional amount   € 500                      
Euro Medium-Term Note program € 3,300 2,000   € 500               € 10,000 € 10,000
Change of Control Triggering Event, potentially required purchase price related to principal amount 101.00%   101.00%                    
Increase (Decrease) retained earnings connected to long-term incentive € 125 57                      
Borrowings € 7,689 € 8,201       € 1,000     € 6,980        
Weighted average [member]                          
Debt [Line Items]                          
Borrowings, interest rate 2.90% 2.40% 2.90%                    
Share repurchase program [member]                          
Debt [Line Items]                          
Notional amount € 481 € 83             € 781        
Commercial Paper Programme [Member]                          
Debt [Line Items]                          
Notional amount     $ 2.5     € 101 € 200            
Committed revolving credit facility [Member]                          
Debt [Line Items]                          
Undrawn borrowing facilities 1,000                        
Purchase forward contracts [Member]                          
Debt [Line Items]                          
Notional amount 224 € 211     € 138     € 63   € 90 € 174    
Purchase forward contracts [Member] | Not later than one year [member]                          
Debt [Line Items]                          
Notional amount 61                        
Purchase forward contracts [Member] | Later than one year and not later than two years [member]                          
Debt [Line Items]                          
Notional amount € 77                        
Bank borrowings [Member] | Weighted average [member]                          
Debt [Line Items]                          
Borrowings, interest rate 8.60% 5.70% 8.60%