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Deferred Acquisition Costs and Deferred Sales Inducement Costs (Tables) | 12 Months Ended
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Dec. 31, 2020
Deferred Charges, Insurers [Abstract] |
Schedule of balances of and changes in DAC [Table Text Block] | The balances of and changes in DAC were as follows:
| 2020 |  | 2019 |  | 2018
(in millions)
Balance at January 1 | $ | 2,698 |  |  | $ | 2,776 |  |  | $ | 2,676 |
Capitalization of acquisition costs | 228 |  |  | 291 |  |  | 318 |
Amortization | (177) |  |  | (165) |  |  | (355) |
Amortization, impact of valuation assumptions review | (100) |  |  | (14) |  |  | 33 |
Impact of change in net unrealized (gains) losses on securities | (117) |  |  | (175) |  |  | 104 |
Disposal of business | — |  |  | (15) |  |  | — |
Balance at December 31 | $ | 2,532 |  |  | $ | 2,698 |  |  | $ | 2,776 |
Schedule of balances of and changes in DSIC [Table Text Block] | The balances of and changes in DSIC, which is included in other assets, were as follows:
| 2020 |  | 2019 |  | 2018
(in millions)
Balance at January 1 | $ | 218 |  |  | $ | 251 |  |  | $ | 276 |
Capitalization of sales inducement costs | 1 |  |  | 1 |  |  | 2 |
Amortization | (13) |  |  | (15) |  |  | (43) |
Amortization, impact of valuation assumptions review | (16) |  |  | — |  |  | — |
Impact of change in net unrealized (gains) losses on securities | (1) |  |  | (19) |  |  | 16 |
Balance at December 31 | $ | 189 |  |  | $ | 218 |  |  | $ | 251 |

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