Allowance for Expected Credit Losses (Details) - Changes in the Allowance for Estimated Uncollectible Reinsurance
$ in Millions |
3 Months Ended |
|
Mar. 31, 2020
USD ($)
|
|---|
| Reinsurance recoverables, allowance for uncollectible reinsurance |
|
| Reinsurance recoverables (net of allowance for estimated uncollectible reinsurance), balance, beginning of year |
$ 8,235
|
| Reinsurance recoverables (net of allowance for estimated uncollectible reinsurance), balance, end of period |
8,152
|
| Reinsurance recoverables, allowance for uncollectible reinsurance [Roll Forward] |
|
| Reinsurance recoverables, allowance for uncollectible reinsurance, beginning balance |
92
|
| Reinsurance recoverables, allowance for estimated uncollectible reinsurance |
149
|
| Current period change for estimated uncollectible reinsurance |
4
|
| Write-offs of uncollectible reinsurance recoverables |
0
|
| Reinsurance recoverables, allowance for uncollectible reinsurance, ending balance |
149
|
| Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |
|
| Reinsurance recoverables, allowance for uncollectible reinsurance [Roll Forward] |
|
| Reinsurance recoverables, allowance for uncollectible reinsurance, beginning balance |
53
|
| Reinsurance recoverables, allowance for estimated uncollectible reinsurance |
$ 53
|