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FAIR VALUE MEASUREMENTS - Significant Unobservable Inputs Used in the Valuation of Available-for-sale Investments and Derivatives (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012
Assets: |  |  |  |
Available-for-sale Securities | $ 59,433 |  | $ 61,578 |
Asset derivatives | 430 |  | 345 |
Total assets | 62,459 |  | 63,964 |
Liabilities: |  |  |  |
Total liabilities | 643 |  | 934 |
Unobservable Inputs |  |  |  |
Length of Volatility of Japanese Yen to US Dollar Exchange Rate | 10 years |  | 10 years |
Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 56,276 |  | 57,253 |
Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 3,133 |  | 4,302 |
Equity Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 24 |  | 23 |
Mortgage- and asset-backed Securities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 954 |  | 1,031 |
Public Utilities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 8,150 |  | 8,497 |
Sovereign and Supranational | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 1,752 |  | 2,072 |
Banks/financial Institutions | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 6,971 |  | 7,634 |
Banks/financial Institutions | Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 2,915 |  | 3,950 |
Other Corporate | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 24,394 |  | 23,827 |
Other Corporate | Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 218 |  | 352 |
Interest rate swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 26 |  | 32 |
Liabilities: |  |  |  |
Liability derivatives | 1 |  | 3 |
Foreign currency swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 381 |  | 311 |
Liabilities: |  |  |  |
Liability derivatives | 314 |  | 329 |
Credit default swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 2 |  | 2 |
Liabilities: |  |  |  |
Liability derivatives | 56 |  | 67 |
Consensus Pricing Valuation Technique | Equity Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 4 |  | 4 |
Consensus Pricing Valuation Technique | Mortgage- and asset-backed Securities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 439 |  | 338 |
Consensus Pricing Valuation Technique | Public Utilities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 25 |  | 25 |
Consensus Pricing Valuation Technique | Sovereign and Supranational | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 332 |  | 495 |
Consensus Pricing Valuation Technique | Banks/financial Institutions | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 26 |  | 797 |
Consensus Pricing Valuation Technique | Other Corporate | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 138 |  | 412 |
Discounted Cash Flow Valuation Technique | Equity Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 6 |
Discounted Cash Flow Valuation Technique | Mortgage- and asset-backed Securities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 11 |
Discounted Cash Flow Valuation Technique | Public Utilities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 3,328 |
Discounted Cash Flow Valuation Technique | Sovereign and Supranational | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 1,037 |
Discounted Cash Flow Valuation Technique | Banks/financial Institutions | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 2,580 |
Discounted Cash Flow Valuation Technique | Banks/financial Institutions | Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 3,667 |
Discounted Cash Flow Valuation Technique | Other Corporate | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 5,322 |
Discounted Cash Flow Valuation Technique | Other Corporate | Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 352 |
Level 3 |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 469 |  | 3,405 |
Asset derivatives | 158 |  | 191 |
Total assets | 627 |  | 3,596 |
Liabilities: |  |  |  |
Total liabilities | 371 |  | 399 |
Level 3 | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 465 |  | 3,186 |
Level 3 | Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 0 |  | 215 |
Level 3 | Equity Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 4 |  | 4 |
Level 3 | Mortgage- and asset-backed Securities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 439 |  | 338 |
Level 3 | Public Utilities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 0 |  | 420 |
Level 3 | Sovereign and Supranational | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 0 |  | 418 |
Level 3 | Banks/financial Institutions | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 26 |  | 1,024 |
Level 3 | Banks/financial Institutions | Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 0 |  | 215 |
Level 3 | Other Corporate | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 0 |  | 986 |
Level 3 | Other Corporate | Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 0 |  | 0 |
Level 3 | Interest rate swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 26 |  | 32 |
Liabilities: |  |  |  |
Liability derivatives | 1 |  | 3 |
Level 3 | Foreign currency swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 130 |  | 157 |
Liabilities: |  |  |  |
Liability derivatives | 314 |  | 329 |
Level 3 | Credit default swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 2 |  | 2 |
Liabilities: |  |  |  |
Liability derivatives | 56 |  | 67 |
Level 3 | Consensus Pricing Valuation Technique | Equity Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 4 |  | 4 |
Level 3 | Consensus Pricing Valuation Technique | Mortgage- and asset-backed Securities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 439 |  | 338 |
Level 3 | Consensus Pricing Valuation Technique | Public Utilities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 0 |  | 0 |
Level 3 | Consensus Pricing Valuation Technique | Sovereign and Supranational | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 0 |  | 0 |
Level 3 | Consensus Pricing Valuation Technique | Banks/financial Institutions | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 26 |  | 580 |
Level 3 | Consensus Pricing Valuation Technique | Other Corporate | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 0 |  | 411 |
Level 3 | Discounted Cash Flow Valuation Technique | Equity Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 0 |
Level 3 | Discounted Cash Flow Valuation Technique | Mortgage- and asset-backed Securities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 0 |
Level 3 | Discounted Cash Flow Valuation Technique | Public Utilities | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 420 |
Level 3 | Discounted Cash Flow Valuation Technique | Sovereign and Supranational | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 418 |
Level 3 | Discounted Cash Flow Valuation Technique | Banks/financial Institutions | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 444 |
Level 3 | Discounted Cash Flow Valuation Technique | Banks/financial Institutions | Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 215 |
Level 3 | Discounted Cash Flow Valuation Technique | Other Corporate | Fixed Maturities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 575 |
Level 3 | Discounted Cash Flow Valuation Technique | Other Corporate | Perpetual Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities |  |  | 0 |
Level 3 | Discounted Cash Flow Valuation Technique | Interest rate swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 26 |  | 32 |
Liabilities: |  |  |  |
Liability derivatives | 1 |  | 3 |
Level 3 | Discounted Cash Flow Valuation Technique | Credit default swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 2 |  | 2 |
Liabilities: |  |  |  |
Liability derivatives | 56 |  | 67 |
Level 3 | Net Asset Value Valuation Technique | Equity Securities |  |  |  |
Assets: |  |  |  |
Available-for-sale Securities | 4 |  | 4 |
Level 3 | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Discounted Cash Flow Valuation Technique | Foreign currency swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 35 |  | 51 |
Liabilities: |  |  |  |
Liability derivatives | 114 |  | 118 |
Level 3 | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Discounted Cash Flow Valuation Technique | Foreign currency swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 5 |  | 4 |
Liabilities: |  |  |  |
Liability derivatives | 46 |  | 60 |
Level 3 | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Discounted Cash Flow Valuation Technique | Foreign currency swaps |  |  |  |
Assets: |  |  |  |
Asset derivatives | 90 |  | 102 |
Liabilities: |  |  |  |
Liability derivatives | $ 154 |  | $ 151 |
Level 3 | Liability | Lower Limit | Interest rate swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 45.00% | [1] | 49.00% | [1]
CDS spreads | 0.91% |  | 0.91% |
Level 3 | Liability | Lower Limit | Credit default swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 45.00% | [1] | 49.00% | [1]
CDS spreads | 0.91% |  | 0.91% |
Level 3 | Liability | Upper Limit | Interest rate swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 56.00% | [1] | 50.00% | [1]
CDS spreads | 1.43% |  | 1.52% |
Level 3 | Liability | Upper Limit | Credit default swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 56.00% | [1] | 50.00% | [1]
CDS spreads | 1.43% |  | 1.52% |
Level 3 | Liability | Weighted Average | Interest rate swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 50.00% | [1] |  |
CDS spreads | 1.20% |  |  |
Recovery rate | 37.00% |  | 37.00% |
Level 3 | Liability | Weighted Average | Credit default swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 50.00% | [1] |  |
CDS spreads | 1.20% |  |  |
Recovery rate | 37.00% |  | 37.00% |
Level 3 | Liability | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Foreign exchange rates | 21.10% | [2] | 20.65% | [2]
Level 3 | Liability | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
CDS spreads | 0.35% |  | 0.22% |
Level 3 | Liability | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
CDS spreads | 1.57% |  | 1.41% |
Level 3 | Liability | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
CDS spreads | 0.19% |  | 0.25% |
Level 3 | Liability | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
CDS spreads | 2.04% |  | 1.86% |
Level 3 | Liability | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Foreign exchange rates | 21.10% | [2] | 20.65% | [2]
Level 3 | Liability | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 2.01% | [3] | 1.84% | [3]
Level 3 | Liability | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 3.02% | [3] | 2.84% | [3]
Level 3 | Liability | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 2.01% | [3] | 1.84% | [3]
Level 3 | Liability | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 3.02% | [3] | 2.84% | [3]
Level 3 | Liability | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 2.01% | [3] | 1.84% | [3]
Level 3 | Liability | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 3.02% | [3] | 2.84% | [3]
Level 3 | Liability | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 0.69% | [4] | 0.84% | [4]
Level 3 | Liability | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 1.84% | [4] | 2.05% | [4]
Level 3 | Liability | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 0.69% | [4] | 0.84% | [4]
Level 3 | Liability | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 1.84% | [4] | 2.05% | [4]
Level 3 | Liability | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 0.69% | [4] | 0.84% | [4]
Level 3 | Liability | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 1.84% | [4] | 2.05% | [4]
Level 3 | Assets | Public Utilities |  |  |  |
Unobservable Inputs |  |  |  |
Fair Value Inputs, Volatility Rate |  |  | 7.36% |
Level 3 | Assets | Sovereign and Supranational |  |  |  |
Unobservable Inputs |  |  |  |
Fair Value Inputs, Volatility Rate |  |  | 7.36% |
Level 3 | Assets | Banks/financial Institutions |  |  |  |
Unobservable Inputs |  |  |  |
Fair Value Inputs, Volatility Rate |  |  | 7.36% |
Level 3 | Assets | Banks/financial Institutions | Perpetual Securities |  |  |  |
Unobservable Inputs |  |  |  |
Fair Value Inputs, Volatility Rate |  |  | 7.36% |
Level 3 | Assets | Other Corporate |  |  |  |
Unobservable Inputs |  |  |  |
Fair Value Inputs, Volatility Rate |  |  | 7.36% |
Level 3 | Assets | Lower Limit | Equity Securities |  |  |  |
Unobservable Inputs |  |  |  |
Offered quotes (in dollars per share) | $ 1 |  | $ 2 |
Level 3 | Assets | Lower Limit | Interest rate swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 45.00% | [1] | 49.00% | [1]
CDS spreads | 0.91% |  | 0.91% |
Level 3 | Assets | Lower Limit | Credit default swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 45.00% |  | 49.00% |
CDS spreads | 0.91% |  | 0.91% |
Level 3 | Assets | Upper Limit | Equity Securities |  |  |  |
Unobservable Inputs |  |  |  |
Offered quotes (in dollars per share) | $ 868 |  | $ 943 |
Level 3 | Assets | Upper Limit | Interest rate swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 56.00% | [1] | 50.00% | [1]
CDS spreads | 1.43% |  | 1.52% |
Level 3 | Assets | Upper Limit | Credit default swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 56.00% |  | 50.00% |
CDS spreads | 1.43% |  | 1.52% |
Level 3 | Assets | Weighted Average | Equity Securities |  |  |  |
Unobservable Inputs |  |  |  |
Offered quotes (in dollars per share) | $ 8 |  | $ 8 |
Level 3 | Assets | Weighted Average | Interest rate swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 50.00% | [1] |  |
CDS spreads | 1.20% |  |  |
Recovery rate | 37.00% |  | 37.00% |
Level 3 | Assets | Weighted Average | Credit default swaps |  |  |  |
Unobservable Inputs |  |  |  |
Base correlation | 50.00% |  |  |
CDS spreads | 1.20% |  |  |
Recovery rate | 37.00% |  | 37.00% |
Level 3 | Assets | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Foreign exchange rates | 21.10% | [2] | 20.65% | [2]
Level 3 | Assets | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
CDS spreads | 0.22% |  | 0.12% |
Level 3 | Assets | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
CDS spreads | 1.29% |  | 1.17% |
Level 3 | Assets | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
CDS spreads | 0.15% |  | 0.12% |
Level 3 | Assets | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
CDS spreads | 1.25% |  | 1.26% |
Level 3 | Assets | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Foreign exchange rates | 21.10% | [2] | 20.65% | [2]
Level 3 | Assets | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 2.01% | [3] | 1.84% | [3]
Level 3 | Assets | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 3.02% | [3] | 2.84% | [3]
Level 3 | Assets | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 2.01% | [3] | 1.84% | [3]
Level 3 | Assets | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 3.02% | [3] | 2.84% | [3]
Level 3 | Assets | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 2.01% | [3] | 1.84% | [3]
Level 3 | Assets | United States of America, Dollars | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 3.02% | [3] | 2.84% | [3]
Level 3 | Assets | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 0.69% | [4] | 0.84% | [4]
Level 3 | Assets | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), CDS Spreads and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 1.84% | [4] | 2.05% | [4]
Level 3 | Assets | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 0.69% | [4] | 0.84% | [4]
Level 3 | Assets | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), Interest Rates (JPY), and CDS Spreads [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 1.84% | [4] | 2.84% | [4]
Level 3 | Assets | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Lower Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 0.69% | [4] | 0.84% | [4]
Level 3 | Assets | Japan, Yen | Fair Value, Unobservable Input, Interest Rates (USD), interest rates (JPY), and Foreign Exchange Rates [Member] | Upper Limit | Foreign currency swaps |  |  |  |
Unobservable Inputs |  |  |  |
Interest rates | 1.84% | [4] | 2.05% | [4]
[1] | Weighted-average range of base correlations for our bespoke tranches for attachment and detachment points corresponding to market indices
[2] | Based on 10 year volatility of JPY/USD exchange rate
[3] | Inputs derived from U.S. long-term rates to accommodate long maturity nature of our swaps
[4] | Inputs derived from Japan long-term rates to accommodate long maturity nature of our swaps

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