XML 381 R316.htm IDEA: XBRL DOCUMENT v3.20.1
Defined Benefit Plans - Summary of Movements of Defined Benefit Plans (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of net defined benefit liability (asset) [Line Items]      
Beginning Balance € 3,989 € 3,950  
Defined benefit expenses 244 206 € 262
Current year service cost 157 131 158
Interest expense 89 96 109
Remeasurements of the defined benefit obligations:      
Past service cost (1) (21) (6)
Contributions paid (298) (234)  
Benefits paid (118) (118)  
Net exchange differences 18 47  
Other (88) 5  
Ending Balance 4,359 3,989 3,950
Defined benefit plans [member]      
Remeasurements of the defined benefit obligations:      
Remeasurements of defined benefit plans 612 134  
Commissions and expenses [member] | Present value of defined benefit obligation [member]      
Disclosure of net defined benefit liability (asset) [Line Items]      
Beginning Balance 7,514 7,572  
Current year service cost 157 131  
Interest expense 221 213  
Remeasurements of the defined benefit obligations:      
- Actuarial gains and losses arising from changes in demographic assumptions 40 (28)  
- Actuarial gains and losses arising from changes in financial assumptions 1,126 (102)  
Past service cost (1) (21)  
Contributions by plan participants 8 11  
Benefits paid (353) (409)  
Net exchange differences 144 144  
Other (76) 5  
Ending Balance 8,779 7,514 7,572
Commissions and expenses [member] | Defined benefit plans [member]      
Disclosure of net defined benefit liability (asset) [Line Items]      
Beginning Balance 3,525 3,622  
Interest expense 133 117  
Remeasurements of the defined benefit obligations:      
Remeasurements of defined benefit plans 566 (264)  
Contributions by employer 306 245  
Benefits paid (235) (291)  
Net exchange differences 126 96  
Ending Balance 4,420 3,525 3,622
Retirement Benefit Plans [member]      
Disclosure of net defined benefit liability (asset) [Line Items]      
Beginning Balance 3,714 3,657  
Defined benefit expenses 227 192  
Current year service cost 148 121 148
Interest expense 80 87 99
Remeasurements of the defined benefit obligations:      
Past service cost (1) (16) (5)
Remeasurements of defined benefit plans 607 157  
Contributions paid (298) (234)  
Benefits paid (100) (99)  
Net exchange differences 14 37  
Other (89) 5  
Ending Balance 4,076 3,714 3,657
Other Post Employment Benefit Plans [member]      
Disclosure of net defined benefit liability (asset) [Line Items]      
Beginning Balance 275 293  
Defined benefit expenses 17 13  
Current year service cost 8 10 11
Interest expense 9 8 10
Remeasurements of the defined benefit obligations:      
Past service cost   (5) (1)
Remeasurements of defined benefit plans 5 (23)  
Benefits paid (18) (19)  
Net exchange differences 4 11  
Ending Balance € 283 € 275 € 293