XML 37 R24.htm IDEA: XBRL DOCUMENT v3.23.2

Regulatory Matters (Tables)

6 Months Ended

Jun. 30, 2023

Regulated Operations [Abstract]

Regulatory Assets and Liabilities [Table Text Block]

Regulatory Assets and Liabilities			June 30, 2023						December 31, 2022
Millions
Current Regulatory Assets (a)
Fuel Adjustment Clause			$15.7						$25.6
Total Current Regulatory Assets			$15.7						$25.6
Non-Current Regulatory Assets
Defined Benefit Pension and Other Postretirement Plans			$223.6						$225.9
Income Taxes			93.3						97.6
Cost Recovery Riders			42.4						41.2
Asset Retirement Obligations			36.6						35.6
Taconite Harbor (b)			27.1						—
Fuel Adjustment Clause			5.4						14.5
Manufactured Gas Plant			14.3						15.1
PPACA Income Tax Deferral			4.0						4.1
Other			7.8						7.0
Total Non-Current Regulatory Assets			$454.5						$441.0
Current Regulatory Liabilities (c)
Provision for Interim Rate Refund (d)			$31.8						$18.4
Transmission Formula Rates Refund			2.5						4.9
Other			2.1						0.1
Total Current Regulatory Liabilities			$36.4						$23.4
Non-Current Regulatory Liabilities
Income Taxes			$320.7						$332.5
Wholesale and Retail Contra AFUDC			79.3						80.7
Plant Removal Obligations			63.7						60.0
Fuel Adjustment Clause			17.8						—
North Dakota Investment Tax Credits			16.6						16.9
Defined Benefit Pension and Other Postretirement Benefit Plans			13.8						17.6
Non-Jurisdictional Land Sales			12.7						7.5
Boswell Units 1 and 2 Net Plant and Equipment			6.7						6.7
Other			6.7						4.2
Total Non-Current Regulatory Liabilities			$538.0						$526.1

(a)Current regulatory assets are presented within Prepayments and Other on the Consolidated Balance Sheet.

(b)In the first quarter of 2023, Minnesota Power retired Taconite Harbor Units 1 and 2. The remaining net book value was reclassified from property, plant and equipment to a regulatory asset on the Consolidated Balance Sheet when the units were retired. Minnesota Power expects to receive recovery of the remaining net book value from customers.

(c)Current regulatory liabilities are presented within Other Current Liabilities on the Consolidated Balance Sheet.

(d)See 2022 Minnesota General Rate Case.

X

- References

No definition available.

+ Details

Name:	us-gaap_RegulatedOperationsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfRegulatoryAssetsAndLiabilitiesTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration