{
  "cik": 1993004,
  "cik_padded": "0001993004",
  "entityName": "NorthWestern Energy Group, Inc.",
  "fiscal_years": [
    {
      "accn": "0001993004-26-000006",
      "filed": "2026-02-12",
      "fiscal_year": 2025,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD",
        "total_liabilities": "USD"
      },
      "fundamentals": {
        "capex": 524456000.0,
        "cash": 8781000.0,
        "dividends_paid": 161389000.0,
        "eps_diluted": 2.94,
        "free_cash_flow": -130001000.0,
        "net_income": 181092000.0,
        "operating_cash_flow": 394455000.0,
        "operating_income": 325818000.0,
        "revenue": 1610559000.0,
        "stockholders_equity": 2885740000.0,
        "total_assets": 8459691000.0,
        "total_liabilities": 5573951000.0
      },
      "period_end": "2025-12-31",
      "ratio_units": {
        "leverage": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "leverage": 1.9315499663864382,
        "net_margin": 0.11244046321805037,
        "operating_margin": 0.2023011885935256,
        "payout_ratio": 0.8911989486007112,
        "revenue_growth_yoy": 0.0638490836238637,
        "roa_avg2y": 0.022007611858993154,
        "roa_period_end": 0.02140645562586151,
        "roe_avg2y": 0.06306046550499353,
        "roe_period_end": 0.06275409427044709
      }
    },
    {
      "accn": "0001993004-26-000006",
      "filed": "2026-02-12",
      "fiscal_year": 2024,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD",
        "total_liabilities": "USD"
      },
      "fundamentals": {
        "capex": 549244000.0,
        "cash": 4283000.0,
        "dividends_paid": 158589000.0,
        "eps_diluted": 3.65,
        "free_cash_flow": -142503000.0,
        "net_income": 224111000.0,
        "operating_cash_flow": 406741000.0,
        "operating_income": 323321000.0,
        "revenue": 1513898000.0,
        "stockholders_equity": 2857700000.0,
        "total_assets": 7997524000.0,
        "total_liabilities": 5139824000.0
      },
      "period_end": "2024-12-31",
      "ratio_units": {
        "leverage": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "leverage": 1.7985876754032963,
        "net_margin": 0.1480357329225615,
        "operating_margin": 0.21356854953239915,
        "payout_ratio": 0.707635948257783,
        "revenue_growth_yoy": 0.06451882827535628,
        "roa_avg2y": 0.028735539334855564,
        "roa_period_end": 0.028022547978599377,
        "roe_avg2y": 0.07942953889534919,
        "roe_period_end": 0.07842355740630577
      }
    },
    {
      "accn": "0001993004-26-000006",
      "filed": "2026-02-12",
      "fiscal_year": 2023,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD",
        "total_liabilities": "USD"
      },
      "fundamentals": {
        "capex": 566889000.0,
        "cash": 9164000.0,
        "dividends_paid": 154050000.0,
        "eps_diluted": 3.22,
        "free_cash_flow": -77658000.0,
        "net_income": 194131000.0,
        "operating_cash_flow": 489231000.0,
        "operating_income": 300455000.0,
        "revenue": 1422143000.0,
        "stockholders_equity": 2785314000.0,
        "total_assets": 7600652000.0,
        "total_liabilities": 4815338000.0
      },
      "period_end": "2023-12-31",
      "ratio_units": {
        "leverage": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "leverage": 1.7288312915527657,
        "net_margin": 0.13650596318373046,
        "operating_margin": 0.211269190229112,
        "payout_ratio": 0.7935363234104805,
        "revenue_growth_yoy": -0.03768615889303083,
        "roa_avg2y": 0.026025652154532296,
        "roa_period_end": 0.02554136145162284,
        "roe_avg2y": 0.07123423790527726,
        "roe_period_end": 0.06969806635804796
      }
    },
    {
      "accn": "0001993004-26-000006",
      "filed": "2026-02-12",
      "fiscal_year": 2022,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD",
        "total_liabilities": "USD"
      },
      "fundamentals": {
        "capex": 515140000.0,
        "cash": 8489000.0,
        "dividends_paid": 140062000.0,
        "eps_diluted": 3.25,
        "free_cash_flow": -207898000.0,
        "net_income": 183008000.0,
        "operating_cash_flow": 307242000.0,
        "operating_income": 263079000.0,
        "revenue": 1477837000.0,
        "stockholders_equity": 2665183000.0,
        "total_assets": 7317783000.0,
        "total_liabilities": 4652600000.0
      },
      "period_end": "2022-12-31",
      "ratio_units": {
        "leverage": "ratio",
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "leverage": 1.7456962617576355,
        "net_margin": 0.12383503728760344,
        "operating_margin": 0.17801624942398925,
        "payout_ratio": 0.7653326630529813,
        "revenue_growth_yoy": 0.07689263988760606,
        "roa_avg2y": 0.02596184796583627,
        "roa_period_end": 0.025008667242524135,
        "roe_avg2y": 0.07313158954751507,
        "roe_period_end": 0.06866620415933915
      }
    },
    {
      "accn": "0001993004-25-000021",
      "filed": "2025-02-13",
      "fiscal_year": 2021,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 434328000.0,
        "cash": 2820000.0,
        "dividends_paid": 128483000.0,
        "eps_diluted": 3.6,
        "free_cash_flow": -214350000.0,
        "net_income": 186840000.0,
        "operating_cash_flow": 219978000.0,
        "operating_income": 275681000.0,
        "revenue": 1372316000.0,
        "stockholders_equity": 2339713000.0,
        "total_assets": 6780443000.0
      },
      "period_end": "2021-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.13614939999242157,
        "operating_margin": 0.20088740494171897,
        "payout_ratio": 0.687663241275958,
        "roa_period_end": 0.0275557216541751,
        "roe_avg2y": 0.08456579240374328,
        "roe_period_end": 0.07985594814406724
      }
    },
    {
      "accn": "0001993004-24-000006",
      "filed": "2024-02-15",
      "fiscal_year": 2020,
      "form": "10-K",
      "fundamental_units": {
        "stockholders_equity": "USD"
      },
      "fundamentals": {
        "stockholders_equity": 2079095000.0
      },
      "period_end": "2020-12-31",
      "ratios": {}
    }
  ],
  "latest_filing": {
    "accn": "0001993004-26-000006",
    "filed": "2026-02-12",
    "form": "10-K"
  },
  "note": "Static grepcent export of verified SEC companyfacts-derived values. Monetary values are raw reported units from grepcent's resolved facts; no scaling and no FX conversion. Capex, dividends, and buybacks are reported as positive outflow magnitudes. ROE/ROA include both period-end basis (site-consistent) and average-of-two-years basis where the prior-year denominator exists.",
  "schema_version": "1",
  "sic": "4931",
  "sic_description": "Electric & Other Services Combined",
  "source_urls": {
    "sec_companyfacts": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001993004.json",
    "sec_submissions": "https://data.sec.gov/submissions/CIK0001993004.json"
  },
  "ticker": "NWE"
}
