v3.19.3.a.u2
Income Tax - Schedule of Tax Loss Carry-forwards Expected To Expire (Details)
€ in Millions
Dec. 31, 2019
EUR (€)
Tax Losses Carried Forward  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire € 1,505
Research and Development Credit Carryforward  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 16
Foreign Tax Credits  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 4
2020-2029 | Tax Losses Carried Forward  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 0
2020-2029 | Research and Development Credit Carryforward  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 0
2020-2029 | Foreign Tax Credits  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 4
2030 and Onwards | Tax Losses Carried Forward  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 509
2030 and Onwards | Research and Development Credit Carryforward  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 16
2030 and Onwards | Foreign Tax Credits  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 0
Unlimited | Tax Losses Carried Forward  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 996
Unlimited | Research and Development Credit Carryforward  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire 0
Unlimited | Foreign Tax Credits  
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]  
Tax loss carry-forwards expected to expire € 0