v3.8.0.1

Investments (Fixed Maturities and Equity Securities Excluding Investments Classified as Trading) (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | $ 312,385 | $ 292,581
Fair Value | [1] | 346,780 | 321,419
Amortized Cost or Cost |  | 4,147 | 7,149
Fair Value |  | 6,174 | 9,748
Amortized Cost | [1] | 2,049 | 2,144
Fair Value |  | 2,430 | 2,524
Fixed maturities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 312,385 | 292,581
Gross Unrealized Gains |  | 36,171 | 33,463
Gross Unrealized Losses |  | 1,776 | 4,625
Fair Value |  | 346,780 | 321,419
Amortized Cost |  | 2,049 | 2,144
Gross Unrealized Gains |  | 381 | 380
Gross Unrealized Losses |  | 0 | 0
Fair Value |  | 2,430 | 2,524
Fixed maturities | U.S. Treasury securities and obligations of U.S. government authorities and agencies |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 22,837 | 21,505
Gross Unrealized Gains |  | 3,647 | 3,280
Gross Unrealized Losses |  | 346 | 1,001
Fair Value |  | 26,138 | 23,784
Fixed maturities | Obligations of U.S. states and their political subdivisions |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 9,366 | 9,060
Gross Unrealized Gains |  | 1,111 | 716
Gross Unrealized Losses |  | 6 | 84
Fair Value |  | 10,471 | 9,692
Fixed maturities | Foreign government bonds |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 88,062 | 79,862
Gross Unrealized Gains |  | 15,650 | 16,748
Gross Unrealized Losses |  | 293 | 354
Fair Value |  | 103,419 | 96,256
Amortized Cost |  | 865 | 839
Gross Unrealized Gains |  | 265 | 262
Gross Unrealized Losses |  | 0 | 0
Fair Value |  | 1,130 | 1,101
Fixed maturities | U.S. corporate public securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 81,967 | 76,383
Gross Unrealized Gains |  | 8,671 | 6,460
Gross Unrealized Losses |  | 414 | 1,232
Fair Value |  | 90,224 | 81,611
Fixed maturities | U.S. corporate private securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 31,852 | 29,974
Gross Unrealized Gains |  | 2,051 | 2,122
Gross Unrealized Losses |  | 169 | 308
Fair Value |  | 33,734 | 31,788
Fixed maturities | Foreign corporate public securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 26,389 | 25,758
Gross Unrealized Gains |  | 3,118 | 2,784
Gross Unrealized Losses |  | 99 | 305
Fair Value |  | 29,408 | 28,237
Amortized Cost |  | 654 | 651
Gross Unrealized Gains |  | 82 | 71
Gross Unrealized Losses |  | 0 | 0
Fair Value |  | 736 | 722
Fixed maturities | Foreign corporate private securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 23,322 | 21,383
Gross Unrealized Gains |  | 1,242 | 646
Gross Unrealized Losses |  | 337 | 1,149
Fair Value |  | 24,227 | 20,880
Amortized Cost |  | 84 | 81
Gross Unrealized Gains |  | 2 | 4
Gross Unrealized Losses |  | 0 | 0
Fair Value |  | 86 | 85
Fixed maturities | Commercial Mortgage Backed Securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 13,134 | 12,589
Gross Unrealized Gains |  | 238 | 240
Gross Unrealized Losses |  | 91 | 125
Fair Value |  | 13,281 | 12,704
Amortized Cost |  | 0 | 0
Gross Unrealized Gains |  | 0 | 0
Gross Unrealized Losses |  | 0 | 0
Fair Value |  | 0 | 0
Fixed maturities | Asset-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 11,965 | 11,759
Gross Unrealized Gains |  | 278 | 229
Gross Unrealized Losses |  | 10 | 53
Fair Value |  | 12,233 | 11,935
Fixed maturities | Residential mortgage-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 3,491 | 4,308
Gross Unrealized Gains |  | 165 | 238
Gross Unrealized Losses |  | 11 | 14
Fair Value |  | 3,645 | 4,532
Amortized Cost |  | 446 | 573
Gross Unrealized Gains |  | 32 | 43
Gross Unrealized Losses |  | 0 | 0
Fair Value |  | 478 | 616
Equity securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Gross Unrealized Gains |  | 2,056 | 2,641
Gross Unrealized Losses |  | 29 | 42
Amortized Cost or Cost |  | 4,147 | 7,149
Fair Value |  | 6,174 | 9,748
Available-for-sale | Fixed maturities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 312,385 |
Fair Value |  | 346,780 |
Available-for-sale | Fixed maturities | U.S. Treasury securities and obligations of U.S. government authorities and agencies |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 22,837 |
Fair Value |  | 26,138 |
Available-for-sale | Fixed maturities | Obligations of U.S. states and their political subdivisions |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 9,366 |
Fair Value |  | 10,471 |
Available-for-sale | Fixed maturities | Commercial Mortgage Backed Securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 13,134 |
Fair Value |  | 13,281 |
Available-for-sale | Fixed maturities | Asset-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 11,965 |
Fair Value |  | 12,233 |
Available-for-sale | Fixed maturities | Residential mortgage-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 3,491 |
Fair Value |  | 3,645 |
Available-for-sale | Equity securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 4,147 |
Fair Value |  | 6,174 |
Available-for-sale | OTTI | Fixed maturities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | (267) | (337)
Available-for-sale | OTTI | Fixed maturities | U.S. Treasury securities and obligations of U.S. government authorities and agencies |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | 0 | 0
Available-for-sale | OTTI | Fixed maturities | Obligations of U.S. states and their political subdivisions |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | 0 | 0
Available-for-sale | OTTI | Fixed maturities | Foreign government bonds |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | 0 | 0
Available-for-sale | OTTI | Fixed maturities | U.S. corporate public securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | (10) | (17)
Available-for-sale | OTTI | Fixed maturities | U.S. corporate private securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | (13) | (22)
Available-for-sale | OTTI | Fixed maturities | Foreign corporate public securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | (5) | (6)
Available-for-sale | OTTI | Fixed maturities | Foreign corporate private securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | 0 | 0
Available-for-sale | OTTI | Fixed maturities | Commercial Mortgage Backed Securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | 0 | (1)
Available-for-sale | OTTI | Fixed maturities | Asset-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | (237) | (288)
Available-for-sale | OTTI | Fixed maturities | Residential mortgage-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | (2) | (3)
Available-for-sale | Net Unrealized Investment Gains (Losses) | Fixed maturities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | 553 | 649
Held-to-maturity | Fixed maturities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost |  | 2,049 |
Fair Value |  | 2,430 |
Held-to-maturity | Fixed maturities | Commercial Mortgage Backed Securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost |  | 0 |
Fair Value |  | 0 |
Held-to-maturity | Fixed maturities | Residential mortgage-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost |  | 446 |
Fair Value |  | 478 |
Held-to-maturity | Net Unrealized Investment Gains (Losses) | Fixed maturities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
OTTI in AOCI |  | 2 | 1
Prudential Netting Agreement | U.S. corporate private securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fair Value |  | 2,660 | 1,456
Prudential Netting Agreement | Fixed maturities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost |  | 4,627 | 4,403
Fair Value |  | 4,913 | 4,403
Prudential Netting Agreement | Fixed maturities | U.S. corporate private securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost or Cost |  | 2,660 | 1,456
Fair Value |  | $ 2,660 | $ 1,456
[1] | See Note 5 for details of balances associated with variable interest entities.

X
- Definition Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, attributable to parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners). + References No definition available. + Details
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