Fair Value of Assets and Liabilities (Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
[1] |
$ 346,780
|
$ 321,419
|
| Trading account assets - equity |
[1] |
22,097
|
21,840
|
| Trading account assets - all other |
[1] |
5,752
|
5,764
|
| Equity securities, available-for-sale |
|
6,174
|
9,748
|
| Commercial mortgage and other loans |
[1] |
56,045
|
52,779
|
| Other long-term investments |
[1] |
12,308
|
11,283
|
| Short-term investments |
|
6,775
|
7,508
|
| Other assets |
[1] |
17,035
|
14,780
|
| Separate account assets |
|
306,617
|
287,636
|
| TOTAL ASSETS |
|
831,921
|
783,962
|
| Future policy benefits |
|
257,317
|
240,908
|
| Other liabilities |
[1] |
16,619
|
14,739
|
| Total liabilities |
|
777,577
|
737,874
|
| Netting |
|
(9,600)
|
(11,716)
|
| Embedded Derivative, Fair Value of Embedded Derivative, Net Liability |
|
8,748
|
8,252
|
| Future policy benefits |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Embedded Derivative, Fair Value of Embedded Derivative, Net Liability |
|
8,700
|
8,200
|
| Embedded Derivative, Fair Value of Embedded Derivative Gross Asset |
|
900
|
1,200
|
| Embedded Derivative, Fair Value of Embedded Derivative Gross Liability |
|
9,600
|
9,400
|
| Fair Value, Measurements, Recurring |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
346,780
|
321,419
|
| Trading account assets |
|
27,740
|
27,454
|
| Equity securities, available-for-sale |
|
6,174
|
9,748
|
| Commercial mortgage and other loans |
|
593
|
519
|
| Other long-term investments |
|
272
|
149
|
| Short-term investments |
|
5,764
|
7,182
|
| Cash equivalents |
|
8,298
|
8,306
|
| Other assets |
|
14
|
0
|
| Separate account assets |
|
280,393
|
262,017
|
| TOTAL ASSETS |
|
676,028
|
636,794
|
| Future policy benefits |
|
8,720
|
8,238
|
| Other liabilities |
|
688
|
369
|
| Notes issued by consolidated VIEs |
|
1,196
|
1,839
|
| Total liabilities |
|
10,604
|
10,446
|
| Asset Netting |
|
(9,600)
|
(11,716)
|
| Liability Netting |
|
(5,312)
|
(5,945)
|
| Netting |
|
(4,288)
|
(5,771)
|
| Fair Value, Measurements, Recurring | All other |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Asset Netting |
|
(9,601)
|
(11,708)
|
| Fair Value, Measurements, Recurring | Other long-term investments |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Asset Netting |
|
1
|
(8)
|
| Fair Value, Measurements, Recurring | Other liabilities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Liability Netting |
|
(5,312)
|
(5,945)
|
| Fair Value, Measurements, Recurring | U.S. Treasury securities and obligations of U.S. government authorities and agencies |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
26,138
|
23,784
|
| Trading account assets - debt |
|
328
|
301
|
| Fair Value, Measurements, Recurring | Obligations of U.S. states and their political subdivisions |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
10,471
|
9,692
|
| Trading account assets - debt |
|
208
|
194
|
| Fair Value, Measurements, Recurring | Foreign government bonds |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
103,419
|
96,256
|
| Trading account assets - debt |
|
1,080
|
941
|
| Fair Value, Measurements, Recurring | U.S. corporate public securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
90,224
|
81,611
|
| Fair Value, Measurements, Recurring | U.S. corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
33,734
|
31,788
|
| Fair Value, Measurements, Recurring | Foreign corporate public securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
29,408
|
28,237
|
| Fair Value, Measurements, Recurring | Foreign corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
24,227
|
20,880
|
| Fair Value, Measurements, Recurring | Corporate securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - debt |
|
17,264
|
17,180
|
| Fair Value, Measurements, Recurring | Asset-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
12,233
|
11,935
|
| Trading account assets - debt |
|
1,485
|
1,415
|
| Fair Value, Measurements, Recurring | Commercial mortgage-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
13,281
|
12,704
|
| Trading account assets - debt |
|
2,321
|
2,062
|
| Fair Value, Measurements, Recurring | Residential mortgage-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
3,645
|
4,532
|
| Trading account assets - debt |
|
1,030
|
1,210
|
| Fair Value, Measurements, Recurring | Equity securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - equity |
|
2,798
|
2,391
|
| Fair Value, Measurements, Recurring | All other |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - all other |
|
1,226
|
1,760
|
| Fair Value, Measurements, Recurring | All other | All other |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Asset Netting |
|
(9,601)
|
(11,708)
|
| Fair Value, Measurements, Recurring | Level 1 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Trading account assets |
|
2,071
|
1,898
|
| Equity securities, available-for-sale |
|
5,344
|
6,033
|
| Commercial mortgage and other loans |
|
0
|
0
|
| Other long-term investments |
|
24
|
44
|
| Short-term investments |
|
3,906
|
5,623
|
| Cash equivalents |
|
1,900
|
3,885
|
| Other assets |
|
0
|
0
|
| Separate account assets |
|
45,397
|
38,915
|
| TOTAL ASSETS |
|
58,642
|
56,398
|
| Future policy benefits |
|
0
|
0
|
| Other liabilities |
|
4
|
8
|
| Notes issued by consolidated VIEs |
|
0
|
0
|
| Total liabilities |
|
4
|
8
|
| Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury securities and obligations of U.S. government authorities and agencies |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Trading account assets - debt |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Obligations of U.S. states and their political subdivisions |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Trading account assets - debt |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Foreign government bonds |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Trading account assets - debt |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | U.S. corporate public securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | U.S. corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Foreign corporate public securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Foreign corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Corporate securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - debt |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Asset-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Trading account assets - debt |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Commercial mortgage-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Trading account assets - debt |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Residential mortgage-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
0
|
0
|
| Trading account assets - debt |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Equity securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - equity |
|
2,015
|
1,690
|
| Fair Value, Measurements, Recurring | Level 1 | All other |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - all other |
|
56
|
208
|
| Fair Value, Measurements, Recurring | Level 2 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
337,084
|
314,562
|
| Trading account assets |
|
33,189
|
36,029
|
| Equity securities, available-for-sale |
|
540
|
3,450
|
| Commercial mortgage and other loans |
|
593
|
519
|
| Other long-term investments |
|
111
|
106
|
| Short-term investments |
|
1,850
|
1,558
|
| Cash equivalents |
|
6,398
|
4,421
|
| Other assets |
|
1
|
0
|
| Separate account assets |
|
232,874
|
221,253
|
| TOTAL ASSETS |
|
612,640
|
581,898
|
| Future policy benefits |
|
0
|
0
|
| Other liabilities |
|
5,946
|
6,284
|
| Notes issued by consolidated VIEs |
|
0
|
0
|
| Total liabilities |
|
5,946
|
6,284
|
| Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury securities and obligations of U.S. government authorities and agencies |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
26,086
|
23,784
|
| Trading account assets - debt |
|
328
|
301
|
| Fair Value, Measurements, Recurring | Level 2 | Obligations of U.S. states and their political subdivisions |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
10,466
|
9,687
|
| Trading account assets - debt |
|
208
|
194
|
| Fair Value, Measurements, Recurring | Level 2 | Foreign government bonds |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
103,271
|
96,132
|
| Trading account assets - debt |
|
857
|
714
|
| Fair Value, Measurements, Recurring | Level 2 | U.S. corporate public securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
90,115
|
81,350
|
| Fair Value, Measurements, Recurring | Level 2 | U.S. corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
31,845
|
30,434
|
| Fair Value, Measurements, Recurring | Level 2 | Foreign corporate public securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
29,329
|
28,166
|
| Fair Value, Measurements, Recurring | Level 2 | Foreign corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
23,528
|
20,393
|
| Fair Value, Measurements, Recurring | Level 2 | Corporate securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - debt |
|
16,712
|
16,992
|
| Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
5,629
|
7,591
|
| Trading account assets - debt |
|
697
|
1,086
|
| Fair Value, Measurements, Recurring | Level 2 | Commercial mortgage-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
13,268
|
12,690
|
| Trading account assets - debt |
|
2,321
|
2,061
|
| Fair Value, Measurements, Recurring | Level 2 | Residential mortgage-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
3,547
|
4,335
|
| Trading account assets - debt |
|
1,029
|
1,208
|
| Fair Value, Measurements, Recurring | Level 2 | Equity securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - equity |
|
274
|
214
|
| Fair Value, Measurements, Recurring | Level 2 | All other |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - all other |
|
10,763
|
13,259
|
| Fair Value, Measurements, Recurring | Level 3 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
9,696
|
6,857
|
| Trading account assets |
|
2,081
|
1,235
|
| Equity securities, available-for-sale |
|
290
|
265
|
| Commercial mortgage and other loans |
|
0
|
0
|
| Other long-term investments |
|
136
|
7
|
| Short-term investments |
|
8
|
1
|
| Cash equivalents |
|
0
|
0
|
| Other assets |
|
13
|
0
|
| Separate account assets |
|
2,122
|
1,849
|
| TOTAL ASSETS |
|
14,346
|
10,214
|
| Future policy benefits |
|
8,720
|
8,238
|
| Other liabilities |
|
50
|
22
|
| Notes issued by consolidated VIEs |
|
1,196
|
1,839
|
| Total liabilities |
|
9,966
|
10,099
|
| Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury securities and obligations of U.S. government authorities and agencies |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
52
|
0
|
| Trading account assets - debt |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Obligations of U.S. states and their political subdivisions |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
5
|
5
|
| Trading account assets - debt |
|
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Foreign government bonds |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
148
|
124
|
| Trading account assets - debt |
|
223
|
227
|
| Fair Value, Measurements, Recurring | Level 3 | U.S. corporate public securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
109
|
261
|
| Fair Value, Measurements, Recurring | Level 3 | U.S. corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
1,889
|
1,354
|
| Fair Value, Measurements, Recurring | Level 3 | Foreign corporate public securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
79
|
71
|
| Fair Value, Measurements, Recurring | Level 3 | Foreign corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
699
|
487
|
| Fair Value, Measurements, Recurring | Level 3 | Corporate securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - debt |
|
552
|
188
|
| Fair Value, Measurements, Recurring | Level 3 | Asset-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
6,604
|
4,344
|
| Trading account assets - debt |
|
788
|
329
|
| Fair Value, Measurements, Recurring | Level 3 | Commercial mortgage-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
13
|
14
|
| Trading account assets - debt |
|
0
|
1
|
| Fair Value, Measurements, Recurring | Level 3 | Residential mortgage-backed securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
98
|
197
|
| Trading account assets - debt |
|
1
|
2
|
| Fair Value, Measurements, Recurring | Level 3 | Equity securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - equity |
|
509
|
487
|
| Fair Value, Measurements, Recurring | Level 3 | All other |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Trading account assets - all other |
|
8
|
1
|
| Prudential Netting Agreement | U.S. corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
2,660
|
1,456
|
| Prudential Netting Agreement | Fair Value, Measurements, Recurring | U.S. corporate private securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fixed maturities, available-for-sale: |
|
2,660
|
1,456
|
| Other long-term investments |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fair value investment measured at NAV per share |
|
1,969
|
1,579
|
| Separate account assets |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Fair value investment measured at NAV per share |
|
$ 26,224
|
$ 25,619
|
|
|