Unrecognized Tax Benefits of NORTHERN STATES POWER CO /WI/ from 31 Dec 2010 to 31 Dec 2025

Taxonomy & unit
us-gaap: USD
Description
Amount of unrecognized tax benefits.
Summary
NORTHERN STATES POWER CO /WI/ quarterly Unrecognized Tax Benefits in USD history and change rate from 31 Dec 2010 to 31 Dec 2025.
  • NORTHERN STATES POWER CO /WI/ Unrecognized Tax Benefits for the quarter ending 31 Dec 2025 was $4,000,000, unchanged year-over-year.
Source SEC data
View on sec.gov
Unrecognized Tax Benefits, Quarterly (USD)
Unrecognized Tax Benefits, YoY Quarterly Change (%)

NORTHERN STATES POWER CO /WI/ Quarterly Unrecognized Tax Benefits (USD)

Period Value YoY Chg Change % Date Report Filed Fiscal Year Fiscal Period
Q4 2025 $4,000,000 $0 0% 31 Dec 2025 10-K 25 Feb 2026 2025 FY
Q4 2024 $4,000,000 +$1,000,000 +33% 31 Dec 2024 10-K 25 Feb 2026 2025 FY
Q4 2023 $3,000,000 $0 0% 31 Dec 2023 10-K 25 Feb 2026 2025 FY
Q4 2022 $3,000,000 $0 0% 31 Dec 2022 10-K 25 Feb 2026 2025 FY
Q4 2021 $3,000,000 +$1,000,000 +50% 31 Dec 2021 10-K 21 Feb 2024 2023 FY
Q3 2021 $3,000,000 +$1,400,000 +88% 30 Sep 2021 10-Q 28 Oct 2021 2021 Q3
Q2 2021 $3,000,000 -$400,000 -12% 30 Jun 2021 10-Q 29 Jul 2021 2021 Q2
Q1 2021 $3,000,000 -$500,000 -14% 31 Mar 2021 10-Q 29 Apr 2021 2021 Q1
Q4 2020 $2,000,000 -$1,000,000 -33% 31 Dec 2020 10-K 21 Feb 2024 2023 FY
Q3 2020 $1,600,000 -$1,700,000 -52% 30 Sep 2020 10-Q 29 Oct 2020 2020 Q3
Q2 2020 $3,400,000 +$500,000 +17% 30 Jun 2020 10-Q 31 Jul 2020 2020 Q2
Q1 2020 $3,500,000 +$600,000 +21% 31 Mar 2020 10-Q 07 May 2020 2020 Q1
Q4 2019 $3,000,000 $0 0% 31 Dec 2019 10-K 23 Feb 2023 2022 FY
Q3 2019 $3,300,000 +$400,000 +14% 30 Sep 2019 10-Q 25 Oct 2019 2019 Q3
Q2 2019 $2,900,000 +$200,000 +7.4% 30 Jun 2019 10-Q 01 Aug 2019 2019 Q2
Q1 2019 $2,900,000 +$400,000 +16% 31 Mar 2019 10-Q 26 Apr 2019 2019 Q1
Q4 2018 $3,000,000 +$600,000 +25% 31 Dec 2018 10-K 17 Feb 2021 2020 FY
Q3 2018 $2,900,000 +$500,000 +21% 30 Sep 2018 10-Q 26 Oct 2018 2018 Q3
Q2 2018 $2,700,000 -$2,800,000 -51% 30 Jun 2018 10-Q 27 Jul 2018 2018 Q2
Q1 2018 $2,500,000 -$2,900,000 -54% 31 Mar 2018 10-Q 27 Apr 2018 2018 Q1
Q4 2017 $2,400,000 -$2,900,000 -55% 31 Dec 2017 10-K 21 Feb 2020 2019 FY
Q3 2017 $2,400,000 -$2,900,000 -55% 30 Sep 2017 10-Q 27 Oct 2017 2017 Q3
Q2 2017 $5,500,000 +$800,000 +17% 30 Jun 2017 10-Q 28 Jul 2017 2017 Q2
Q1 2017 $5,400,000 +$800,000 +17% 31 Mar 2017 10-Q 28 Apr 2017 2017 Q1
Q4 2016 $5,300,000 +$800,000 +18% 31 Dec 2016 10-K 21 Feb 2020 2019 FY
Q3 2016 $5,300,000 +$2,200,000 +71% 30 Sep 2016 10-Q 31 Oct 2016 2016 Q3
Q2 2016 $4,700,000 +$2,100,000 +81% 30 Jun 2016 10-Q 04 Aug 2016 2016 Q2
Q1 2016 $4,600,000 +$2,200,000 +92% 31 Mar 2016 10-Q 13 May 2016 2016 Q1
Q4 2015 $4,500,000 +$1,500,000 +50% 31 Dec 2015 10-K 22 Feb 2019 2018 FY
Q3 2015 $3,100,000 +$1,300,000 +72% 30 Sep 2015 10-Q 02 Nov 2015 2015 Q3
Q2 2015 $2,600,000 +$800,000 +44% 30 Jun 2015 10-Q 03 Aug 2015 2015 Q2
Q1 2015 $2,400,000 +$700,000 +41% 31 Mar 2015 10-Q 04 May 2015 2015 Q1
Q4 2014 $3,000,000 +$1,500,000 +100% 31 Dec 2014 10-K/A 27 Jul 2018 2017 FY
Q3 2014 $1,800,000 +$100,000 +5.9% 30 Sep 2014 10-Q 03 Nov 2014 2014 Q3
Q2 2014 $1,800,000 +$400,000 +29% 30 Jun 2014 10-Q 04 Aug 2014 2014 Q2
Q1 2014 $1,700,000 +$400,000 +31% 31 Mar 2014 10-Q 05 May 2014 2014 Q1
Q4 2013 $1,500,000 +$200,000 +15% 31 Dec 2013 10-K 24 Feb 2017 2016 FY
Q3 2013 $1,700,000 +$400,000 +31% 30 Sep 2013 10-Q 28 Oct 2013 2013 Q3
Q2 2013 $1,400,000 30 Jun 2013 10-Q 05 Aug 2013 2013 Q2
Q1 2013 $1,300,000 31 Mar 2013 10-Q 06 May 2013 2013 Q1
Q4 2012 $1,300,000 -$200,000 -13% 31 Dec 2012 10-K 22 Feb 2016 2015 FY
Q3 2012 $1,300,000 30 Sep 2012 10-Q 29 Oct 2012 2012 Q3
Q4 2011 $1,500,000 -$400,000 -21% 31 Dec 2011 10-K 23 Feb 2015 2014 FY
Q4 2010 $1,900,000 31 Dec 2010 10-K 24 Feb 2014 2013 FY
* An asterisk sign (*) next to the value indicates that the value is likely invalid.