XML 401 R139.htm IDEA: XBRL DOCUMENT v3.19.1
Financial Risks - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2018
EUR (€)
Issuer
Violation
Delinquency
Counterparty
Dec. 31, 2017
EUR (€)
Violation
Dec. 31, 2016
Disclosure of financial risk management [line items]      
For NHG backed mortgage loans, lender-incurred haircut applied on realized losses on each defaulted loan 10.00%    
Number of defaults with derivativies counterparty for last three years | Counterparty 0    
Number of violation of credit name limit policy at group level | Violation 0 0  
Fair value € 139,834,000,000 € 139,711,000,000  
Net impairments and (recoveries) (10,000,000)    
Maximum value of unrealized loss disclosed separately 25,000,000    
Securities available-for-sale 84,675,000,000 88,170,000,000  
Financial assets at fair value through profit or loss 8,597,000,000 7,119,000,000  
Subordinated securities 1,389,000,000 764,000,000  
Recoveries on previously impaired assets 34,000,000 16,000,000  
Amount held in general account investment readily redeemable and saleable 32,116,000,000 34,393,000,000  
Undrawn committed borrowing facilities 3,680,000,000 3,367,000,000  
Equity portfolio [member]      
Disclosure of financial risk management [line items]      
Gross unrealized gain (AFS) 40,000,000 62,000,000  
Gross unrealized loss € 20,000,000 13,000,000  
Government [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million | Issuer 0    
Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Corporate financial banking sub sector [member]      
Disclosure of financial risk management [line items]      
Subordinated securities € 456,000,000 627,000,000  
Unrealized loss on subordinated securities € 42,000,000 10,000,000  
REITS sub sector [member] | Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Capital goods sub sector [member] | Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Consumer cyclical sub sector [member] | Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Consumer non cyclical sub sector [member] | Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Energy sub sector [member] | Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Technology sub sector [member] | Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Transportation sub sector [member] | Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Communications sub sector [member] | Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Electric sub sector [member] | Investment grade [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Aegon US, NL [member]      
Disclosure of financial risk management [line items]      
Gross unrealized gain (AFS) € 4,370,000,000 6,392,000,000  
Gross unrealized losses AFS debt securities 1,352,000,000 462,000,000  
Gross unrealized loss 20,000,000 13,000,000  
Aegon Americas and Netherlands [member]      
Disclosure of financial risk management [line items]      
Fair value 4,503,000,000 4,225,000,000  
Net impairments and (recoveries) (10,000,000) 0  
Recoveries on previously impaired assets 34,000,000 16,000,000  
Aegon US, NL [member]      
Disclosure of financial risk management [line items]      
Impairment release € 4,000,000 2,000,000  
Belfius bank SA [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million | Issuer 0    
Residential mortgage- backed securities [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Residential mortgage- backed securities [member] | Aegon Americas [member]      
Disclosure of financial risk management [line items]      
Securities available-for-sale € 2,102,000,000 2,985,000,000  
Financial assets at fair value through profit or loss 35,000,000 40,000,000  
Gross unrealized loss on available-for-sale securities 29,000,000 29,000,000  
Net unrealized gains on securities 266,000,000 268,000,000  
Residential mortgage- backed securities [member] | Aegon US, NL [member]      
Disclosure of financial risk management [line items]      
Securities available-for-sale 2,497,000,000 3,541,000,000  
Gross unrealized losses RMBS 30,000,000 29,000,000  
Net unrealized gains on securities 268,000,000 281,000,000  
Residential mortgage- backed securities [member] | Aegon Netherlands [member]      
Disclosure of financial risk management [line items]      
Securities available-for-sale 395,000,000 556,000,000  
Commercial mortgage- backed securities (CMBSs) [member]      
Disclosure of financial risk management [line items]      
Securities available-for-sale 3,349,000,000 3,403,000,000  
Net unrealized gains on securities € 17,000,000 36,000,000  
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Commercial mortgage- backed securities (CMBSs) [member] | Aegon Americas [member]      
Disclosure of financial risk management [line items]      
Securities available-for-sale € 3,314,000,000 3,375,000,000  
Financial assets at fair value through profit or loss 0 0  
Net unrealized gains on securities 17,000,000 36,000,000  
Gross unrealized losses CMBS 44,000,000 22,000,000  
Commercial mortgage- backed securities (CMBSs) [member] | Aegon Netherlands [member]      
Disclosure of financial risk management [line items]      
Securities available-for-sale € 35,000,000 28,000,000  
Asset backed securities [member]      
Disclosure of financial risk management [line items]      
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million 0    
Available for sale bonds [member] | Aegon Americas [member] | Corporate financial banking sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued € 6,069,000,000 6,364,000,000  
Available for sale bonds [member] | Aegon Americas [member] | REITS sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 1,552,000,000 1,290,000,000  
Available for sale bonds [member] | Aegon Americas [member] | Capital goods sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 1,995,000,000 2,212,000,000  
Available for sale bonds [member] | Aegon Americas [member] | Consumer cyclical sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 2,428,000,000 2,494,000,000  
Available for sale bonds [member] | Aegon Americas [member] | Consumer non cyclical sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 5,362,000,000 5,729,000,000  
Available for sale bonds [member] | Aegon Americas [member] | Energy sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 3,592,000,000 3,813,000,000  
Available for sale bonds [member] | Aegon Americas [member] | Technology sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 2,002,000,000 1,819,000,000  
Available for sale bonds [member] | Aegon Americas [member] | Transportation sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 1,549,000,000 1,597,000,000  
Available for sale bonds [member] | Aegon Americas [member] | Communications sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 2,484,000,000 2,600,000,000  
Available for sale bonds [member] | Aegon Americas [member] | Electric sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 3,121,000,000 3,013,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | Corporate financial banking sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 6,293,000,000 6,669,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 106,000,000 39,000,000  
Net unrealized gain 4,000,000 307,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | REITS sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 1,624,000,000 1,369,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 49,000,000 5,000,000  
Net unrealized gain 33,000,000 48,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | Capital goods sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 2,038,000,000 2,308,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 60,000,000 5,000,000  
Net unrealized gain 29,000,000 210,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | Consumer cyclical sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 2,637,000,000 2,657,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 75,000,000 10,000,000  
Net unrealized gain 52,000,000 245,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | Consumer non cyclical sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 5,615,000,000 6,010,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 182,000,000 35,000,000  
Net unrealized gain 99,000,000 529,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | Energy sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 3,802,000,000 4,020,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 138,000,000 41,000,000  
Net unrealized gain 13,000,000 316,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | Technology sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 2,046,000,000 1,840,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 47,000,000 6,000,000  
Net unrealized gain 28,000,000 157,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | Transportation sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 1,720,000,000 1,787,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 70,000,000 9,000,000  
Net unrealized gain 2,000,000 117,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | Communications sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 2,566,000,000 2,690,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 68,000,000 21,000,000  
Net unrealized gain 90,000,000 279,000,000  
Available for sale bonds [member] | Aegon US, NL [member] | Electric sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 3,178,000,000 3,098,000,000  
Gross unrealized losses Corporate Financial Banking Sub Sector 64,000,000 13,000,000  
Net unrealized gain 128,000,000 343,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | Corporate financial banking sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 224,000,000 305,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | REITS sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 71,000,000 79,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | Capital goods sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 43,000,000 96,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | Consumer cyclical sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 209,000,000 163,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | Consumer non cyclical sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 253,000,000 281,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | Energy sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 211,000,000 207,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | Technology sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 44,000,000 21,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | Transportation sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 171,000,000 191,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | Communications sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 82,000,000 90,000,000  
Available for sale bonds [member] | Aegon Netherlands [member] | Electric sub sector [member]      
Disclosure of financial risk management [line items]      
Available for sale bonds issued 57,000,000 85,000,000  
Asset backed securities [member]      
Disclosure of financial risk management [line items]      
Fair value 4,503,000,000 4,226,000,000  
Asset backed securities [member] | Aegon US, NL [member]      
Disclosure of financial risk management [line items]      
Gross unrealized losses ABS 52,000,000 14,000,000  
Asset backed securities [member] | Aegon Americas [member]      
Disclosure of financial risk management [line items]      
Fair value 2,626,000,000 2,429,000,000  
Financial assets at fair value through profit or loss 6,000,000 10,000,000  
Gross unrealized loss 18,000,000 12,000,000  
Asset backed securities [member] | Aegon Netherlands [member]      
Disclosure of financial risk management [line items]      
Fair value 1,877,000,000 1,796,000,000  
Gross unrealized loss 34,000,000 2,000,000  
Asset backed securities [member] | Aegon Americas and Netherlands [member]      
Disclosure of financial risk management [line items]      
Fair value 4,503,000,000 4,226,000,000  
Monoline insurers [member] | Aegon Americas [member] | Asia Portfolios [member]      
Disclosure of financial risk management [line items]      
Letters of credit /guarantees collateral € 178,000,000 264,000,000  
Monoline insurers [member] | Municipal Bond Insurance Association, Inc. [member]      
Disclosure of financial risk management [line items]      
Percentage of Indirect Exposure 15.00%   31.00%
Monoline insurers [member] | Ambac Financial Group, Inc. [member]      
Disclosure of financial risk management [line items]      
Percentage of Indirect Exposure 13.00%   13.00%
Monoline insurers [member] | Assured Guaranty Corporation [member]      
Disclosure of financial risk management [line items]      
Percentage of Indirect Exposure 52.00%   43.00%
Americas commercial and agricultural mortgage loan portfolio [member]      
Disclosure of financial risk management [line items]      
Fair value € 8,059,000,000 € 7,132,000,000  
Percentage of loan to value 54.00% 55.00%  
Assumed defaults rate on delinquent loans 1.25% 0.06%  
Delinquency days (defined as 60 days in arrears) | Delinquency 60    
Net impairments and (recoveries) € (1,000,000) € 19,000,000  
Americas commercial and agricultural mortgage loan portfolio [member] | Foreclosed on impaired loans [member]      
Disclosure of financial risk management [line items]      
Net impairments and (recoveries) 0 0  
Foreclosure and recoveries 0 0  
Netherlands Mortgage Loan Portfolio [member]      
Disclosure of financial risk management [line items]      
Fair value € 31,686,000,000 € 30,926,000,000  
Percentage of loan to value 70.00% 76.00%  
Assumed defaults rate on delinquent loans 0.20% 0.20%  
Delinquency days (defined as 60 days in arrears) | Delinquency 60    
Percentage of loan portfolio guaranteed by government 46.00% 51.00%  
Impairment release € 0 € 8,000,000  
Percentage of average default of portfolio 0.05%    
Bottom of range [member]      
Disclosure of financial risk management [line items]      
Net impairments and (recoveries) € 25,000,000 € 25,000,000  
Fed funds rate 1.00%    
Unrealized loss position period 6 months    
Bottom of range [member] | Government bonds [member]      
Disclosure of financial risk management [line items]      
Unrealized loss positions € 25,000,000    
Bottom of range [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | REITS sub sector [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Capital goods sub sector [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Consumer cyclical sub sector [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Consumer non cyclical sub sector [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Energy sub sector [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Technology sub sector [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Transportation sub sector [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Communications sub sector [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Electric sub sector [member] | Below investment grade [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Aegon Americas [member]      
Disclosure of financial risk management [line items]      
Assumed defaults rate on delinquent loans   0.00%  
Prepayment assumptions   0.00%  
Percentage of loss severity assumption   24.00%  
Bottom of range [member] | Belfius bank SA [member]      
Disclosure of financial risk management [line items]      
Gross unrealized loss 25,000,000    
Bottom of range [member] | Residential mortgage- backed securities [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Commercial mortgage- backed securities (CMBSs) [member]      
Disclosure of financial risk management [line items]      
Unrealized loss 25,000,000    
Bottom of range [member] | Asset backed securities [member]      
Disclosure of financial risk management [line items]      
Unrealized loss € 25,000,000    
Top of range [member]      
Disclosure of financial risk management [line items]      
Rate of fair value of investment Significant or prolonged decline is generally defined within Aegon as an unrealized loss position for more than six months or a fair value of less than 80% of the cost price of the investment.    
Top of range [member] | Aegon Americas [member]      
Disclosure of financial risk management [line items]      
Assumed defaults rate on delinquent loans   100.00%  
Prepayment assumptions   25.00%  
Percentage of loss severity assumption   103.00%  
Weighted average [member] | Aegon Americas [member]      
Disclosure of financial risk management [line items]      
Assumed defaults rate on delinquent loans   78.90% 77.60%
Prepayment assumptions   5.40% 5.50%
Assumed defaults rate on current loans   57.00% 58.30%