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REGULATORY ASSETS AND LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2019

Regulatory Assets and Liabilities Disclosure [Abstract]

Schedule of regulatory assets

(in millions)		March 31, 2019				December 31, 2018
Regulatory assets
Pension and OPEB costs		$	1,173.8			$	1,193.5
Plant retirements *		1,027.9				832.3
Environmental remediation costs		697.6				687.1
Income tax related items		384.8				369.1
SSR		317.9				316.7
Asset retirement obligations		223.4				185.4
Uncollectible expense		47.6				38.7
Electric transmission costs		41.7				58.1
We Power generation		36.1				43.0
Energy efficiency programs		11.3				14.0
Other, net		75.0				117.9
Total regulatory assets		$	4,037.1			$	3,855.8
Balance sheet presentation
Other current assets		$	27.3			$	50.7
Regulatory assets		4,009.8				3,805.1
Total regulatory assets		$	4,037.1			$	3,855.8

* On March 31, 2019, the PIPP generating units were retired by WE. See Note 5, Property, Plant, and Equipment, for more information on the retirement of the PIPP units.

Schedule of regulatory liabilities

(in millions)		March 31, 2019				December 31, 2018
Regulatory liabilities
Income tax related items		$	2,401.2			$	2,406.6
Removal costs		1,330.8				1,329.6
Pension and OPEB costs		235.7				238.3
Mines deferral		129.1				120.8
Energy costs refundable through rate adjustments		103.0				39.6
Decoupling		51.0				30.5
Energy efficiency programs		45.7				31.7
Earnings sharing mechanisms		29.9				30.0
Uncollectible expense		29.5				30.5
Derivatives		9.0				16.4
Other, net		13.3				14.4
Total regulatory liabilities		$	4,378.2			$	4,288.4
Balance sheet presentation
Other current liabilities		$	103.9			$	36.8
Regulatory liabilities		4,274.3				4,251.6
Total regulatory liabilities		$	4,378.2			$	4,288.4

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- Definition

Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
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Tabular disclosure of regulatory liabilities. Detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability.

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