New accounting pronouncements (Policies)	9 Months Ended
Sep. 30, 2022
Accounting Changes And Error Corrections [Abstract]
New accounting pronouncements	In August 2018, the Financial Accounting Standards Board issued Accounting Standards Update 2018-12 “Targeted Improvements to the Accounting for Long-Duration Contracts” (“ASU 2018-12”). ASU 2018-12 requires reassessment of cash flow assumptions at least annually and revision of discount rate assumptions each reporting period in valuing policyholder liabilities of long-duration contracts. Under ASU 2018-12, the effects from changes in cash flow assumptions are reflected in earnings and the effects from changes in discount rate assumptions are reflected in other comprehensive income. Currently, the cash flow and discount rate assumptions are set at the contract inception date and not subsequently changed, except under limited circumstances. ASU 2018-12 is to be applied retrospectively to the earliest period presented in the financial statements, will require new disclosures and is effective for fiscal years beginning after December 15, 2022, with early adoption permitted. We will adopt ASU 2018-12 as of January 1, 2023 using the modified retrospective method, whereby revised cash flow and discount rate assumptions as of January 1, 2021 (the transition date) are applied to contracts then in-force, with liabilities then remeasured, with the cumulative effect from discount rate changes (based on changes in prevailing interest rates) recorded in accumulated other comprehensive income and the cumulative effect from cash flow assumption changes in retained earnings. While we have not finalized our assessment and continue to evaluate the impact of the adoption beginning as of the transition date, we believe that the changes in discount rate assumptions will initially have a greater effect on our recorded liabilities than changes in cash flow assumptions. We preliminarily estimate the cumulative effect of adopting ASU 2018-12 will reduce our consolidated shareholders’ equity from the amount previously reported by approximately $6.5 billion as of January 1, 2021, with that reduction declining to approximately $4.7 billion as of December 31, 2021. While we have not determined the effect of adopting ASU 2018-12 as of September 30, 2022, we currently expect the cumulative reduction to our consolidated shareholders’ equity has declined significantly since December 31, 2021, based on the interest rate increases in 2022.

New accounting pronouncements (Policies)

9 Months Ended

Sep. 30, 2022

Accounting Changes And Error Corrections [Abstract]

In August 2018, the Financial Accounting Standards Board issued Accounting Standards Update 2018-12 “Targeted Improvements to the Accounting for Long-Duration Contracts” (“ASU 2018-12”). ASU 2018-12 requires reassessment of cash flow assumptions at least annually and revision of discount rate assumptions each reporting period in valuing policyholder liabilities of long-duration contracts. Under ASU 2018-12, the effects from changes in cash flow assumptions are reflected in earnings and the effects from changes in discount rate assumptions are reflected in other comprehensive income. Currently, the cash flow and discount rate assumptions are set at the contract inception date and not subsequently changed, except under limited circumstances. ASU 2018-12 is to be applied retrospectively to the earliest period presented in the financial statements, will require new disclosures and is effective for fiscal years beginning after December 15, 2022, with early adoption permitted.

We will adopt ASU 2018-12 as of January 1, 2023 using the modified retrospective method, whereby revised cash flow and discount rate assumptions as of January 1, 2021 (the transition date) are applied to contracts then in-force, with liabilities then remeasured, with the cumulative effect from discount rate changes (based on changes in prevailing interest rates) recorded in accumulated other comprehensive income and the cumulative effect from cash flow assumption changes in retained earnings. While we have not finalized our assessment and continue to evaluate the impact of the adoption beginning as of the transition date, we believe that the changes in discount rate assumptions will initially have a greater effect on our recorded liabilities than changes in cash flow assumptions. We preliminarily estimate the cumulative effect of adopting ASU 2018-12 will reduce our consolidated shareholders’ equity from the amount previously reported by approximately $6.5 billion as of January 1, 2021, with that reduction declining to approximately $4.7 billion as of December 31, 2021. While we have not determined the effect of adopting ASU 2018-12 as of September 30, 2022, we currently expect the cumulative reduction to our consolidated shareholders’ equity has declined significantly since December 31, 2021, based on the interest rate increases in 2022.