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Deferred Policy Acquisition Costs (Tables) | 12 Months Ended
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Dec. 31, 2019
Deferred Policy Acquisition Costs Disclosures [Abstract] |
Deferred Policy Acquisition Costs Details | A progression of deferred policy acquisition costs is presented below (in millions):
| P&C |  |  | Annuity and Other |  |  |
| Deferred |  |  | Deferred |  | Sales |  |  |  |  |  |  |  |  |  |  | Consolidated
| Costs |  |  | Costs |  | Inducements |  | PVFP |  | Subtotal |  | Unrealized (*) |  | Total |  |  | Total
Balance at December 31, 2016 | $ | 238 |  |  |  | $ | 1,110 |  |  | $ | 110 |  |  | $ | 46 |  |  | $ | 1,266 |  |  | $ | (265 | ) |  | $ | 1,001 |  |  |  | $ | 1,239 |
Additions | 588 |  |  |  | 225 |  |  | 4 |  |  | — |  |  | 229 |  |  | — |  |  | 229 |  |  |  | 817 |
Amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic amortization | (556 | ) |  |  | (161 | ) |  | (19 | ) |  | (8 | ) |  | (188 | ) |  | — |  |  | (188 | ) |  |  | (744 | )
Annuity unlocking | — |  |  |  | 34 |  |  | 6 |  |  | 1 |  |  | 41 |  |  | — |  |  | 41 |  |  |  | 41 |
Included in realized gains | — |  |  |  | 9 |  |  | 1 |  |  | — |  |  | 10 |  |  | — |  |  | 10 |  |  |  | 10 |
Foreign currency translation | — |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  | — |
Other | — |  |  |  | — |  |  | — |  |  | 10 |  |  | 10 |  |  | — |  |  | 10 |  |  |  | 10 |
Change in unrealized | — |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (157 | ) |  | (157 | ) |  |  | (157 | )
Balance at December 31, 2017 | 270 |  |  |  | 1,217 |  |  | 102 |  |  | 49 |  |  | 1,368 |  |  | (422 | ) |  | 946 |  |  |  | 1,216 |
Additions | 675 |  |  |  | 263 |  |  | 2 |  |  | — |  |  | 265 |  |  | — |  |  | 265 |  |  |  | 940 |
Amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic amortization | (644 | ) |  |  | (238 | ) |  | (19 | ) |  | (7 | ) |  | (264 | ) |  | — |  |  | (264 | ) |  |  | (908 | )
Annuity unlocking | — |  |  |  | 29 |  |  | — |  |  | — |  |  | 29 |  |  | — |  |  | 29 |  |  |  | 29 |
Included in realized gains | — |  |  |  | 14 |  |  | 1 |  |  | — |  |  | 15 |  |  | — |  |  | 15 |  |  |  | 15 |
Foreign currency translation | (2 | ) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  | (2 | )
Change in unrealized | — |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 392 |  |  | 392 |  |  |  | 392 |
Balance at December 31, 2018 | 299 |  |  |  | 1,285 |  |  | 86 |  |  | 42 |  |  | 1,413 |  |  | (30 | ) |  | 1,383 |  |  |  | 1,682 |
Additions | 744 |  |  |  | 206 |  |  | 2 |  |  | — |  |  | 208 |  |  | — |  |  | 208 |  |  |  | 952 |
Amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic amortization | (721 | ) |  |  | (120 | ) |  | (13 | ) |  | (6 | ) |  | (139 | ) |  | — |  |  | (139 | ) |  |  | (860 | )
Annuity unlocking | — |  |  |  | (76 | ) |  | (1 | ) |  | — |  |  | (77 | ) |  | — |  |  | (77 | ) |  |  | (77 | )
Included in realized gains | — |  |  |  | 8 |  |  | 1 |  |  | — |  |  | 9 |  |  | — |  |  | 9 |  |  |  | 9 |
Foreign currency translation | — |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  | — |
Change in unrealized | — |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (669 | ) |  | (669 | ) |  |  | (669 | )
Balance at December 31, 2019 | $ | 322 |  |  |  | $ | 1,303 |  |  | $ | 75 |  |  | $ | 36 |  |  | $ | 1,414 |  |  | $ | (699 | ) |  | $ | 715 |  |  |  | $ | 1,037 |
(*) Adjustments to DPAC related to net unrealized gains/losses on securities and cash flow hedges.

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