XML 539 R128.htm IDEA: XBRL DOCUMENT v3.22.0.1
PENSIONS AND OTHER POST-EMPLOYMENT BENEFIT OBLIGATIONS - Narrative (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of defined benefit plans [line items]        
Gains on pension plan amendments € (32) € (2) € 1  
Weighted-average maturity of defined benefit obligations 14 years 2 months 12 days 14 years 2 months 12 days    
Other Benefits        
Disclosure of defined benefit plans [line items]        
Gains on pension plan amendments       € 36
Expected contributions to pension and other benefits for next year € 18      
OPEB        
Disclosure of defined benefit plans [line items]        
Loss recognized on disputes about plan changes 31      
Pension Benefits        
Disclosure of defined benefit plans [line items]        
Expected contributions to pension and other benefits for next year € 22      
Actuarial assumption of discount rates        
Disclosure of defined benefit plans [line items]        
Increase in actuarial assumption 0.50%