Investments (excluding Consolidated Investment Entities) - Past due commercial mortgage loans (Details) - USD ($) $ in Millions |
Jun. 30, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Current | ||
| Financing Receivable, Past Due [Line Items] | ||
| Past due commercial mortgage loans | $ 6,895 | $ 6,879 |
| 30-59 days past due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Past due commercial mortgage loans | 0 | 0 |
| 60-89 days past due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Past due commercial mortgage loans | 0 | 0 |
| Greater than 90 days past due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Past due commercial mortgage loans | 9 | 0 |
| Total | ||
| Financing Receivable, Past Due [Line Items] | ||
| Past due commercial mortgage loans | $ 6,904 | $ 6,879 |