REGULATORY ASSETS AND LIABILITIES

9 Months Ended

Sep. 30, 2019

Regulatory Assets and Liabilities Disclosure [Abstract]

REGULATORY ASSETS AND LIABILITIES

REGULATORY ASSETS AND LIABILITIES

The following regulatory assets and liabilities were reflected on our balance sheets at September 30, 2019 and December 31, 2018. For more information on our regulatory assets and liabilities, see Note 5, Regulatory Assets and Liabilities, in our 2018 Annual Report on Form 10-K.

(in millions)	September 30, 2019		December 31, 2018
Regulatory assets
Plant retirements *	$	944.5	$	754.1
Finance and capital leases	915.8		869.3
Pension and OPEB costs	468.0		490.6
Income tax related items	398.8		317.9
SSR	320.1		316.7
We Power generation	29.9		43.0
Environmental remediation costs	23.4		24.2
Electric transmission costs	16.3		57.8
Other, net	17.4		28.7
Total regulatory assets	$	3,134.2	$	2,902.3
Balance sheet presentation
Other current assets	$	—	$	0.1
Regulatory assets	3,134.2		2,902.2
Total regulatory assets	$	3,134.2	$	2,902.3

* On March 31, 2019, we retired the PIPP generating units. See Note 4, Property, Plant, and Equipment, for more information on the retirement of the PIPP units.

(in millions)	September 30, 2019		December 31, 2018
Regulatory liabilities
Income tax related items	$	993.4	$	1,024.8
Removal costs	768.3		748.1
Mines deferral	132.1		120.8
Pension and OPEB benefits	72.9		74.7
Uncollectible expense	23.8		16.4
Energy efficiency programs	15.3		13.5
Other, net	3.7		15.9
Total regulatory liabilities	$	2,009.5	$	2,014.2
Balance sheet presentation
Other current liabilities	$	4.0	$	11.9
Regulatory liabilities	2,005.5		2,002.3
Total regulatory liabilities	$	2,009.5	$	2,014.2