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v3.21.2

Regulatory Matters (Tables) | 9 Months Ended
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Sep. 30, 2021
Regulated Operations [Abstract] |
Regulatory Assets and Liabilities [Table Text Block] |
Regulatory Assets and Liabilities | September 30, 2021 |  | December 31, 2020 |  |
Millions |  |  |  |  |
Non-Current Regulatory Assets |  |  |  |  |
Defined Benefit Pension and Other Postretirement Benefit Plans | $247.6 |  |  | $259.7 |  |  |
Income Taxes | 107.2 |  |  | 113.7 |  |  |
Cost Recovery Riders | 61.8 |  |  | 54.0 |  |  |
Asset Retirement Obligations | 31.4 |  |  | 31.6 |  |  |
Fuel Adjustment Clause | 30.1 |  |  | — |  |  |
Manufactured Gas Plant | 11.9 |  |  | 8.8 |  |  |
PPACA Income Tax Deferral | 4.4 |  |  | 4.5 |  |  |
Boswell Units 1 and 2 Net Plant and Equipment | 3.2 |  |  | 5.0 |  |  |
Other | 5.3 |  |  | 3.6 |  |  |
Total Non-Current Regulatory Assets | $502.9 |  |  | $480.9 |  |  |
Current Regulatory Liabilities (a) |  |  |  |  |
Fuel Adjustment Clause | $2.6 |  |  | $3.7 |  |  |
Transmission Formula Rates Refund | 3.1 |  |  | 2.9 |  |  |
Other | 3.3 |  |  | 1.0 |  |  |
Total Current Regulatory Liabilities | 9.0 |  |  | 7.6 |  |  |
Non-Current Regulatory Liabilities |  |  |  |  |
Income Taxes | 359.3 |  |  | 375.3 |  |  |
Wholesale and Retail Contra AFUDC | 84.4 |  |  | 86.6 |  |  |
Plant Removal Obligations | 47.4 |  |  | 41.2 |  |  |
North Dakota Investment Tax Credits | 12.3 |  |  | 12.0 |  |  |
Defined Benefit Pension and Other Postretirement Benefit Plans | 1.4 |  |  | 4.4 |  |  |
Conservation Improvement Program | — |  |  | 1.5 |  |  |
Other | 4.7 |  |  | 3.8 |  |  |
Total Non-Current Regulatory Liabilities | 509.5 |  |  | 524.8 |  |  |
Total Regulatory Liabilities | $518.5 |  |  | $532.4 |  |  |
(a)Current regulatory liabilities are presented within Other Current Liabilities on the Consolidated Balance Sheet.

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- 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
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