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Significant Accounting Policies and Responsibility for Financial Statements (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 | Aug. 31, 2022 | Sep. 30, 2021 | Jul. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Payment defaults under agreements | $ 0 |  |  |  | $ 0 |  | $ 0 |
Dividends declared per common share (dollars per share) | $ 0.3475 | $ 0.3475 | $ 0.3275 | $ 0.3275 | $ 0.3475 | $ 0.3275 | $ 1.0425 | $ 0.9825
Dividends declared on common stock |  |  |  |  | $ 59,655,000 | $ 56,222,000 | $ 119,311,000 | $ 84,333,000
PNMR |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Equity contribution from parent |  |  |  |  | 68,000,000 | 0 | 68,000,000 | 52,000,000
PNM |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Dividends declared on common stock |  |  |  |  | 85,000,000 | 60,000,000 | 85,000,000 | 60,000,000
Texas-New Mexico Power Company |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Equity contribution from parent |  |  |  |  |  |  | 68,000,000 | 52,000,000
Dividends declared on common stock |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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