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FAIR VALUE DISCLOSURES - QUANTITATIVE INFORMATION ABOUT LEVEL 3 (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Fair Value Inputs [Abstract]    
Asset Derivatives $ 14,228 $ 13,597
Embedded and freestanding derivative liability 5,862 $ 6,206
Discounted Cash Flow Valuation Technique    
Fair Value Inputs [Abstract]    
GMxB Utilization Rates   100.00%
Public corporate | Matrix Pricing Model Valuation Technique    
Fair Value Inputs [Abstract]    
Fair value unobservable inputs, assets $ 53 $ 55
Public corporate | Matrix Pricing Model Valuation Technique | Minimum    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve 0 0
Public corporate | Matrix Pricing Model Valuation Technique | Maximum    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve 0.0565 0.0565
Public corporate | Matrix Pricing Model Valuation Technique | Weighted Average    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve 0.0125 0.0151
Public corporate | Market Comparable Companies Valuation Technique    
Fair Value Inputs [Abstract]    
Fair value unobservable inputs, assets $ 789 $ 636
Public corporate | Market Comparable Companies Valuation Technique | Minimum    
Fair Value Inputs [Abstract]    
EBITDA multiples 5.3 4.3
Discount rate 7.20% 7.00%
Cash flow multiples 9.0 14
Public corporate | Market Comparable Companies Valuation Technique | Maximum    
Fair Value Inputs [Abstract]    
EBITDA multiples 27.9 25.6
Discount rate 17.00% 17.80%
Cash flow multiples 17.7 16.5
Public corporate | Market Comparable Companies Valuation Technique | Weighted Average    
Fair Value Inputs [Abstract]    
EBITDA multiples 12.9 11.7
Discount rate 11.10% 11.40%
Cash flow multiples 13.1 15.6
Asset-backed | Matrix Pricing Model Valuation Technique    
Fair Value Inputs [Abstract]    
Fair value unobservable inputs, assets   $ 2
Asset-backed | Matrix Pricing Model Valuation Technique | Minimum    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve   0.0025
Asset-backed | Matrix Pricing Model Valuation Technique | Maximum    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve   0.0687
Asset-backed | Matrix Pricing Model Valuation Technique | Weighted Average    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve   0.0038
Separate Accounts’ assets | Third Party Appraisal Valuation Technique    
Fair Value Inputs [Abstract]    
Discount rate 6.60% 6.60%
Capitalization Rate 4.60% 4.80%
Exit capitalization rate 5.60% 5.70%
Fair value unobservable inputs, assets $ 326 $ 295
Separate Accounts’ assets | Discounted Cash Flow Valuation Technique    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve 0.0243  
Discount rate 4.40%  
Fair value unobservable inputs, assets $ 1 $ 3
Separate Accounts’ assets | Discounted Cash Flow Valuation Technique | Minimum    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve   0.0273
Discount rate   1.10%
Separate Accounts’ assets | Discounted Cash Flow Valuation Technique | Maximum    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve   0.0512
Discount rate   7.00%
Separate Accounts’ assets | Discounted Cash Flow Valuation Technique | Weighted Average    
Fair Value Inputs [Abstract]    
Spread over the industry-specific benchmark yield curve   0.0283
Discount rate   4.30%
GMIB reinsurance contracts | Discounted Cash Flow Valuation Technique    
Fair Value Inputs [Abstract]    
Fair value unobservable inputs, assets   $ 10,314
GMIB reinsurance contracts | Discounted Cash Flow Valuation Technique | Minimum    
Fair Value Inputs [Abstract]    
Withdrawal Rates 0.00% 0.00%
Utilization Rates 0.00% 0.00%
Non Performance Risk 0.0005 0.0005
Volatility Rates- Equity 9.90% 11.00%
Lapse Rates 1.00% 1.50%
GMIB reinsurance contracts | Discounted Cash Flow Valuation Technique | Maximum    
Fair Value Inputs [Abstract]    
Withdrawal Rates 8.00% 8.00%
Utilization Rates 16.00% 16.00%
Non Performance Risk 0.0010 0.0017
Volatility Rates- Equity 30.90% 38.00%
Lapse Rates 6.30% 5.70%
GMIBNLG    
Fair Value Inputs [Abstract]    
Embedded and freestanding derivative liability $ 4,056 $ 5,155
GMIBNLG | Discounted Cash Flow Valuation Technique    
Fair Value Inputs [Abstract]    
Non Performance Risk 0.010 0.011
Volatility Rates- Equity 20.00% 20.00%
Embedded and freestanding derivative liability $ 4,056 $ 5,155
GMIBNLG | Discounted Cash Flow Valuation Technique | Minimum    
Fair Value Inputs [Abstract]    
NLG Forfeiture Rates 0.55% 0.55%
Withdrawal Rates 0.00% 0.00%
Utilization Rates 0.00% 0.00%
Lapse Rates 0.80% 1.20%
GMIBNLG | Discounted Cash Flow Valuation Technique | Maximum    
Fair Value Inputs [Abstract]    
NLG Forfeiture Rates 2.10% 2.10%
Withdrawal Rates 12.40% 11.50%
Fair Value Inputs GMxB Annuitization Rates 16.00% 16.00%
Lapse Rates 26.20% 26.20%
GWBL/GMWB    
Fair Value Inputs [Abstract]    
Embedded and freestanding derivative liability $ 130 $ 114
GWBL/GMWB | Discounted Cash Flow Valuation Technique    
Fair Value Inputs [Abstract]    
GMxB Utilization Rates 100.00%  
Embedded and freestanding derivative liability $ 130 $ 114
GWBL/GMWB | Discounted Cash Flow Valuation Technique | Minimum    
Fair Value Inputs [Abstract]    
Withdrawal Rates 0.00% 0.00%
Volatility Rates- Equity 9.90% 9.00%
Lapse Rates 0.90% 1.00%
GWBL/GMWB | Discounted Cash Flow Valuation Technique | Maximum    
Fair Value Inputs [Abstract]    
Withdrawal Rates 7.00% 7.00%
Volatility Rates- Equity 30.90% 35.00%
Lapse Rates 5.70% 5.70%
GIB    
Fair Value Inputs [Abstract]    
Embedded and freestanding derivative liability $ (27) $ 30
GIB | Discounted Cash Flow Valuation Technique    
Fair Value Inputs [Abstract]    
GMxB Utilization Rates 0.00% 100.00%
Embedded and freestanding derivative liability $ (27) $ 30
GIB | Discounted Cash Flow Valuation Technique | Minimum    
Fair Value Inputs [Abstract]    
Withdrawal Rates 0.00% 0.00%
Volatility Rates- Equity 9.90% 9.00%
Lapse Rates 0.90% 1.00%
GIB | Discounted Cash Flow Valuation Technique | Maximum    
Fair Value Inputs [Abstract]    
Withdrawal Rates 7.00% 8.00%
Volatility Rates- Equity 30.90% 35.00%
Fair Value Inputs GMxB Annuitization Rates 16.00%  
Lapse Rates 5.70% 5.70%
GMAB    
Fair Value Inputs [Abstract]    
Embedded and freestanding derivative liability $ 5 $ 20
GMAB | Discounted Cash Flow Valuation Technique    
Fair Value Inputs [Abstract]    
Embedded and freestanding derivative liability $ 5 $ 20
GMAB | Discounted Cash Flow Valuation Technique | Minimum    
Fair Value Inputs [Abstract]    
Volatility Rates- Equity 9.90% 9.00%
Lapse Rates 0.50% 1.00%
GMAB | Discounted Cash Flow Valuation Technique | Maximum    
Fair Value Inputs [Abstract]    
Volatility Rates- Equity 30.90% 35.00%
Lapse Rates 11.00% 11.00%
GMIB reinsurance contracts    
Fair Value Inputs [Abstract]    
Asset Derivatives $ 10,488 $ 10,314
GMIB reinsurance contracts | GMIB reinsurance contracts | Discounted Cash Flow Valuation Technique    
Fair Value Inputs [Abstract]    
Asset Derivatives $ 10,488