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FAIR VALUE DISCLOSURES - Quantitative Information about Level 3 (Details)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Asset, fair value $ 10,217 $ 7,993
Corporate | Level 3 | Matrix pricing model    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value Unobservable Inputs $ 31 $ 57
Corporate | Level 3 | Matrix pricing model | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Spread over Benchmark 0.022 0.0065
Corporate | Level 3 | Matrix pricing model | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Spread over Benchmark 0.061 0.058
Corporate | Level 3 | Matrix pricing model | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Spread over Benchmark 0.00000278 0.0184
Corporate | Level 3 | Market comparable companies    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value Unobservable Inputs $ 1,105 $ 1,025
Corporate | EBITDA Multiple | Level 3 | Market comparable companies | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 3.5 3.3
Corporate | EBITDA Multiple | Level 3 | Market comparable companies | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 31.8 56.7
Corporate | EBITDA Multiple | Level 3 | Market comparable companies | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 14.4 14.3
Corporate | Discount rate | Level 3 | Market comparable companies | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 0.051 0.039
Corporate | Discount rate | Level 3 | Market comparable companies | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 0.254 0.165
Corporate | Discount rate | Level 3 | Market comparable companies | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 0.10 0.100
Corporate | Cash Flow Multiples | Level 3 | Market comparable companies | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 0.9 0.8
Corporate | Cash Flow Multiples | Level 3 | Market comparable companies | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 25 48.1
Corporate | Cash Flow Multiples | Level 3 | Market comparable companies | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 10.7 10.7
Other equity investments | Level 3 | Market comparable companies    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value Unobservable Inputs $ 4  
Other equity investments | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value Unobservable Inputs $ 37 $ 36
Fair value inputs, discount period 11 years 11 years
Other equity investments | Discount rate | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 0.100  
Other equity investments | Earnings Multiple | Level 3 | Market comparable companies | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 3.5  
Other equity investments | Earnings Multiple | Level 3 | Market comparable companies | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 27.9  
Other equity investments | Earnings Multiple | Level 3 | Market comparable companies | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 9.5  
Other equity investments | Earnings Multiple | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input 8 8.0
Other equity investments | Discount factor | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, measurement input   0.100
GMIB reinsurance contracts | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Asset, fair value $ 2,818 $ 2,139
GMIB reinsurance contracts | Non-performance risk | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.006 0.0055
GMIB reinsurance contracts | Non-performance risk | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0125 0.0109
GMIB reinsurance contracts | Non-performance risk | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0072  
GMIB reinsurance contracts | Lapse rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.006 0.008
GMIB reinsurance contracts | Lapse rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.16 0.100
GMIB reinsurance contracts | Lapse rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0156  
GMIB reinsurance contracts | Withdrawal rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0 0
GMIB reinsurance contracts | Withdrawal rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.02 0.080
GMIB reinsurance contracts | Withdrawal rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0096  
GMIB reinsurance contracts | Utilization Rate | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0 0
GMIB reinsurance contracts | Utilization Rate | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.61 0.49
GMIB reinsurance contracts | Utilization Rate | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0637  
GMIB reinsurance contracts | Volatility rates - Equity | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.16 0.090
GMIB reinsurance contracts | Volatility rates - Equity | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.34 0.300
GMIB reinsurance contracts | Volatility rates - Equity | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.25  
GMIB reinsurance contracts | Mortality rate | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0272  
GMIBNLG | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Liability, fair value $ 11,682 $ 8,135
GMIBNLG | Non-performance risk | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0141 0.0124
GMIBNLG | Lapse rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.011 0.008
GMIBNLG | Lapse rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.257 0.199
GMIBNLG | Lapse rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0306  
GMIBNLG | Withdrawal rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.004 0.003
GMIBNLG | Withdrawal rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.020 0.110
GMIBNLG | Withdrawal rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0096  
GMIBNLG | Annuitization | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0 0
GMIBNLG | Annuitization | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 1.000 1.000
GMIBNLG | Annuitization | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0592  
GMIBNLG | Mortality rate | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0148  
Assumed GMIB Reinsurance Contracts | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Liability, fair value $ 219 $ 186
Assumed GMIB Reinsurance Contracts | Non-performance risk | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0092 0.0061
Assumed GMIB Reinsurance Contracts | Non-performance risk | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0195 0.0141
Assumed GMIB Reinsurance Contracts | Non-performance risk | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0147  
Assumed GMIB Reinsurance Contracts | Lapse rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.011 0.011
Assumed GMIB Reinsurance Contracts | Lapse rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.111 0.111
Assumed GMIB Reinsurance Contracts | Lapse rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0156  
Assumed GMIB Reinsurance Contracts | Withdrawal rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.006 0.006
Assumed GMIB Reinsurance Contracts | Withdrawal rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.222 0.222
Assumed GMIB Reinsurance Contracts | Withdrawal rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.011 0.011
Assumed GMIB Reinsurance Contracts | Withdrawal rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 1.000 1
Assumed GMIB Reinsurance Contracts | Withdrawal rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0096  
Assumed GMIB Reinsurance Contracts | Utilization Rate | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0 0
Assumed GMIB Reinsurance Contracts | Utilization Rate | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.30 0.30
Assumed GMIB Reinsurance Contracts | Utilization Rate | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0637  
Assumed GMIB Reinsurance Contracts | Volatility rates - Equity | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.140 0.09
Assumed GMIB Reinsurance Contracts | Volatility rates - Equity | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.340 0.30
Assumed GMIB Reinsurance Contracts | Volatility rates - Equity | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.25  
GWBL/GMWB | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Liability, fair value $ 220 $ 172
GWBL/GMWB | Non-performance risk | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0141 0.0124
GWBL/GMWB | Lapse rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.008 0.008
GWBL/GMWB | Lapse rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.16 0.100
GWBL/GMWB | Lapse rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0156  
GWBL/GMWB | Withdrawal rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0 0
GWBL/GMWB | Withdrawal rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.080 0.070
GWBL/GMWB | Withdrawal rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0096  
GWBL/GMWB | Utilization Rate | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 1 1
GWBL/GMWB | Volatility rates - Equity | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.160 0.090
GWBL/GMWB | Volatility rates - Equity | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.340 0.300
GWBL/GMWB | Volatility rates - Equity | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.2457  
GIB | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Liability, fair value $ 77 $ 5
GIB | Non-performance risk | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0141 0.0124
GIB | Lapse rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.008 0.012
GIB | Lapse rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.156 0.199
GIB | Lapse rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0156  
GIB | Withdrawal rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0 0
GIB | Withdrawal rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.020 0.080
GIB | Withdrawal rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0096  
GIB | Utilization Rate | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0 0
GIB | Utilization Rate | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 1.000 1.000
GIB | Utilization Rate | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0637  
GIB | Volatility rates - Equity | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.160 0.090
GIB | Volatility rates - Equity | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.340 0.300
GIB | Volatility rates - Equity | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.25  
GMAB | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Liability, fair value $ 6 $ 4
GMAB | Non-performance risk | Level 3 | Discounted cash flow    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0141  
GMAB | Lapse rates | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.008 0.01
GMAB | Lapse rates | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.160 0.100
GMAB | Lapse rates | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0156  
GMAB | Volatility rates - Equity | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.160 0.09
GMAB | Volatility rates - Equity | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.340 0.300
GMAB | Volatility rates - Equity | Level 3 | Discounted cash flow | Weighted Average    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.25  
Ages 0 - 40 | GMIB reinsurance contracts | Mortality rate | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0001 0.0001
Ages 0 - 40 | GMIB reinsurance contracts | Mortality rate | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0018 0.0018
Ages 0 - 40 | GMIBNLG | Mortality rate | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0001 0.0001
Ages 0 - 40 | GMIBNLG | Mortality rate | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0019 0.0019
Ages 41 - 60 | GMIB reinsurance contracts | Mortality rate | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0007 0.0007
Ages 41 - 60 | GMIB reinsurance contracts | Mortality rate | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0054 0.0054
Ages 41 - 60 | GMIBNLG | Mortality rate | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0006 0.0006
Ages 41 - 60 | GMIBNLG | Mortality rate | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0053 0.0053
Ages 61 - 115 | GMIB reinsurance contracts | Mortality rate | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.0042 0.0042
Ages 61 - 115 | GMIB reinsurance contracts | Mortality rate | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing asset, measurement input 0.422 0.4220
Ages 61 - 115 | GMIBNLG | Mortality rate | Level 3 | Discounted cash flow | Minimum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.0041 0.0041
Ages 61 - 115 | GMIBNLG | Mortality rate | Level 3 | Discounted cash flow | Maximum    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Servicing liability, measurement input 0.4139 0.4139