Investments (Details) - Credit Loss Allowance - USD ($)
$ in Millions |
3 Months Ended |
Mar. 31, 2020 |
Mar. 31, 2019 |
| Allowance for credit losses [Roll Forward] |
|
|
| Allowance for credit losses on fixed maturities classified as available-for-sale, balance, beginning of year |
$ 0
|
|
| Additions for credit losses on securities where no credit losses were previously recognized |
4
|
|
| Additions (reductions) for credit losses on securities where credit losses were previously recognized |
0
|
|
| Reductions due to sales/defaults of credit-impaired securities |
0
|
|
| Reductions for impairments of securities which the Company intends to sell or more likely than not will be required to sell |
0
|
|
| Allowance for credit losses on fixed maturities classified as available-for-sale, balance, end of period |
4
|
|
| Credit impairment charges recognized in net realized investment gains (losses) on securities which the Company intends to sell and for which an allowance for credit loss was not previously recorded |
12
|
|
| Total credit impairment charges included in net realized investment gains (losses) in the consolidated statement of income |
$ 16
|
$ 1
|
| Credit losses on fixed maturities recognized in the consolidated statement of income, as a percentage of the fixed maturity portfolio on a pre-tax basis (less than) |
1.00%
|
1.00%
|
| Credit losses on fixed maturities recognized in the consolidated statement of income, as a percentage of shareholders' equity on an after-tax basis (less than) |
1.00%
|
1.00%
|
| Mortgage-backed securities, collateralized mortgage obligations and pass-through securities [Member] |
|
|
| Allowance for credit losses [Roll Forward] |
|
|
| Allowance for credit losses on fixed maturities classified as available-for-sale, balance, beginning of year |
$ 0
|
|
| Additions for credit losses on securities where no credit losses were previously recognized |
0
|
|
| Additions (reductions) for credit losses on securities where credit losses were previously recognized |
0
|
|
| Reductions due to sales/defaults of credit-impaired securities |
0
|
|
| Reductions for impairments of securities which the Company intends to sell or more likely than not will be required to sell |
0
|
|
| Allowance for credit losses on fixed maturities classified as available-for-sale, balance, end of period |
0
|
|
| All other corporate bonds [Member] |
|
|
| Allowance for credit losses [Roll Forward] |
|
|
| Allowance for credit losses on fixed maturities classified as available-for-sale, balance, beginning of year |
0
|
|
| Additions for credit losses on securities where no credit losses were previously recognized |
4
|
|
| Additions (reductions) for credit losses on securities where credit losses were previously recognized |
0
|
|
| Reductions due to sales/defaults of credit-impaired securities |
0
|
|
| Reductions for impairments of securities which the Company intends to sell or more likely than not will be required to sell |
0
|
|
| Allowance for credit losses on fixed maturities classified as available-for-sale, balance, end of period |
$ 4
|
|