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Income Taxes | 9 Months Ended
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Sep. 30, 2022
Income Taxes |
Income Taxes | 8. Income Taxes Effective Income Tax Rate Our provision for income taxes may not have the customary relationship of taxes to income. A reconciliation between the U.S. corporate income tax rate and the effective income tax rate was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the three months ended |  | For the nine months ended |
​ | ​ | September 30, | ​ | September 30, | ​
​ |  | 2022 |  | 2021 |  | 2022 |  | 2021 | ​
U.S. corporate income tax rate | ​ | 21 | % | ​ | 21 | % | ​ | 21 | % | ​ | 21 | %
Dividends received deduction | ​ | (1) |  | ​ | (4) | ​ | ​ | (1) |  | ​ | (4) | ​
Tax credits | ​ | (1) | ​ | ​ | (3) | ​ | ​ | (1) | ​ | ​ | (2) | ​
Interest exclusion from taxable income | ​ | — | ​ | ​ | (1) | ​ | ​ | — | ​ | ​ | (1) | ​
Foreign country statutory rate differential | ​ | — | ​ | ​ | (1) | ​ | ​ | — | ​ | ​ | — | ​
Impact of equity method presentation | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1) | ​
State income taxes | ​ | 1 | ​ | ​ | 1 | ​ | ​ | — | ​ | ​ | 1 | ​
Low income housing tax credit amortization | ​ | — | ​ | ​ | 1 | ​ | ​ | — | ​ | ​ | 1 | ​
Other | ​ | — |  | ​ | 1 | ​ | ​ | 1 |  | ​ | — | ​
Effective income tax rate | ​ | 20 | % | ​ | 15 | % | ​ | 20 | % | ​ | 15 | %
​ ​ Inflation Reduction Act of 2022 The Inflation Reduction Act of 2022 (“IRA 2022”) was enacted by the U.S. government on August 16, 2022. The IRA 2022 implements a new corporate alternative minimum tax (the Book Minimum Tax or “BMT”) effective January 1, 2023. We are expected to be an “Applicable Corporation,” which requires computation of our U.S. federal income tax liability under two systems, the U.S. regular corporate tax (“RCT”) and the BMT. Although the BMT may apply in any given year when tentative minimum tax (“TMT”) then exceeds the RCT liability, as a “prepayment” the BMT generates a corresponding alternative minimum tax credit (“AMTC”). The AMTC is accounted for as a deferred tax asset (“DTA”) with an indefinite carryover life recoverable in years when the RCT liability then exceeds TMT. The tax accounting consequences of a change in tax law is required to be recognized in the period legislation is enacted. Generally, a company is also required to consider the impact of new tax law on realizability of its DTAs, including determination of whether a change to their valuation allowance amounts is necessary. We made an accounting policy election to disregard our BMT status when evaluating DTAs under the RCT system.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 21 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 17 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.5.Q1) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 270 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI https://asc.fasb.org/topic&trid=2144680 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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