Statutory Accounting Practices - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Statutory Accounting Practices [Line Items] | ||
| Increase in statutory capital and surplus | $ 88 | $ 63 |
| Combined Continental Casualty Companies [Member] | ||
| Statutory Accounting Practices [Line Items] | ||
| Increase in statutory capital and surplus | 10,411 | $ 10,726 |
| Dividends payable without prior supervisory approval | 1,400 | |
| Dividends paid | $ 1,000 | |
| Statutory capital and surplus percentage | 266.00% | 264.00% |
| X | ||||||||||
- Definition The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of dividends available for payment after computation of statutory restrictions on capital surplus. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|