Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

At December 31, details of property, plant and equipment on the balance sheets were as follows (in millions):



	Alliant Energy						IPL						WPL
	2019			2018			2019			2018			2019			2018
Utility:
Electric plant:
Generation in service		$7,625.3			$6,800.6			$4,432.4			$3,610.4			$3,192.9			$3,190.2
Distribution in service	5,783.3			5,452.2			3,190.0			3,023.7			2,593.3			2,428.5
Other in service	456.0			410.8			298.6			260.4			157.4			150.4
Total electric plant	13,864.6			12,663.6			7,921.0			6,894.5			5,943.6			5,769.1
Gas plant in service	1,462.7			1,387.6			801.5			763.1			661.2			624.5
Other plant in service	519.7			513.2			344.7			322.4			175.0			190.8
Accumulated depreciation	(4,601.4		)	(4,314.6		)	(2,498.3		)	(2,294.7		)	(2,103.1		)	(2,019.9		)
Net plant	11,245.6			10,249.8			6,568.9			5,685.3			4,676.7			4,564.5
Leased Sheboygan Falls Energy Facility, net (a)	—			—			—			—			32.3			38.1
Construction work in progress	1,835.0			1,774.8			906.8			1,091.2			928.2			683.6
Other, net	6.1			6.1			5.0			5.0			1.1			1.1
Total utility	13,086.7			12,030.7			7,480.7			6,781.5			5,638.3			5,287.3
Non-utility and other:
Non-utility Generation, net (b)	82.9			86.9			—			—			—			—
Corporate Services and other, net (c)	357.5			344.8			—			—			—			—
Total non-utility and other	440.4			431.7			—			—			—			—
Total property, plant and equipment		$13,527.1			$12,462.4			$7,480.7			$6,781.5			$5,638.3			$5,287.3


(a)	Less accumulated amortization of $88.7 million and $82.8 million for WPL as of December 31, 2019 and 2018, respectively. The Sheboygan Falls Energy Facility is eliminated from WPL upon consolidation and is included in the “Non-utility Generation, net” line within Alliant Energy’s consolidated property, plant and equipment.


(b)	Less accumulated depreciation of $58.5 million and $54.5 million for Alliant Energy as of December 31, 2019 and 2018, respectively.

(c)

Less accumulated depreciation of $172.4 million and $167.5 million for Alliant Energy as of December 31, 2019 and 2018, respectively.

The amount of AFUDC generated by equity and debt components was as follows (in millions):

At December 31, details of property, plant and equipment on the balance sheets were as follows (in millions):



	Alliant Energy						IPL						WPL
	2019			2018			2019			2018			2019			2018
Utility:
Electric plant:
Generation in service		$7,625.3			$6,800.6			$4,432.4			$3,610.4			$3,192.9			$3,190.2
Distribution in service	5,783.3			5,452.2			3,190.0			3,023.7			2,593.3			2,428.5
Other in service	456.0			410.8			298.6			260.4			157.4			150.4
Total electric plant	13,864.6			12,663.6			7,921.0			6,894.5			5,943.6			5,769.1
Gas plant in service	1,462.7			1,387.6			801.5			763.1			661.2			624.5
Other plant in service	519.7			513.2			344.7			322.4			175.0			190.8
Accumulated depreciation	(4,601.4		)	(4,314.6		)	(2,498.3		)	(2,294.7		)	(2,103.1		)	(2,019.9		)
Net plant	11,245.6			10,249.8			6,568.9			5,685.3			4,676.7			4,564.5
Leased Sheboygan Falls Energy Facility, net (a)	—			—			—			—			32.3			38.1
Construction work in progress	1,835.0			1,774.8			906.8			1,091.2			928.2			683.6
Other, net	6.1			6.1			5.0			5.0			1.1			1.1
Total utility	13,086.7			12,030.7			7,480.7			6,781.5			5,638.3			5,287.3
Non-utility and other:
Non-utility Generation, net (b)	82.9			86.9			—			—			—			—
Corporate Services and other, net (c)	357.5			344.8			—			—			—			—
Total non-utility and other	440.4			431.7			—			—			—			—
Total property, plant and equipment		$13,527.1			$12,462.4			$7,480.7			$6,781.5			$5,638.3			$5,287.3


(a)	Less accumulated amortization of $88.7 million and $82.8 million for WPL as of December 31, 2019 and 2018, respectively. The Sheboygan Falls Energy Facility is eliminated from WPL upon consolidation and is included in the “Non-utility Generation, net” line within Alliant Energy’s consolidated property, plant and equipment.


(b)	Less accumulated depreciation of $58.5 million and $54.5 million for Alliant Energy as of December 31, 2019 and 2018, respectively.

(c)

Less accumulated depreciation of $172.4 million and $167.5 million for Alliant Energy as of December 31, 2019 and 2018, respectively.

The amount of AFUDC generated by equity and debt components was as follows (in millions):

At December 31, details of property, plant and equipment on the balance sheets were as follows (in millions):



	Alliant Energy						IPL						WPL
	2019			2018			2019			2018			2019			2018
Utility:
Electric plant:
Generation in service		$7,625.3			$6,800.6			$4,432.4			$3,610.4			$3,192.9			$3,190.2
Distribution in service	5,783.3			5,452.2			3,190.0			3,023.7			2,593.3			2,428.5
Other in service	456.0			410.8			298.6			260.4			157.4			150.4
Total electric plant	13,864.6			12,663.6			7,921.0			6,894.5			5,943.6			5,769.1
Gas plant in service	1,462.7			1,387.6			801.5			763.1			661.2			624.5
Other plant in service	519.7			513.2			344.7			322.4			175.0			190.8
Accumulated depreciation	(4,601.4		)	(4,314.6		)	(2,498.3		)	(2,294.7		)	(2,103.1		)	(2,019.9		)
Net plant	11,245.6			10,249.8			6,568.9			5,685.3			4,676.7			4,564.5
Leased Sheboygan Falls Energy Facility, net (a)	—			—			—			—			32.3			38.1
Construction work in progress	1,835.0			1,774.8			906.8			1,091.2			928.2			683.6
Other, net	6.1			6.1			5.0			5.0			1.1			1.1
Total utility	13,086.7			12,030.7			7,480.7			6,781.5			5,638.3			5,287.3
Non-utility and other:
Non-utility Generation, net (b)	82.9			86.9			—			—			—			—
Corporate Services and other, net (c)	357.5			344.8			—			—			—			—
Total non-utility and other	440.4			431.7			—			—			—			—
Total property, plant and equipment		$13,527.1			$12,462.4			$7,480.7			$6,781.5			$5,638.3			$5,287.3


(a)	Less accumulated amortization of $88.7 million and $82.8 million for WPL as of December 31, 2019 and 2018, respectively. The Sheboygan Falls Energy Facility is eliminated from WPL upon consolidation and is included in the “Non-utility Generation, net” line within Alliant Energy’s consolidated property, plant and equipment.


(b)	Less accumulated depreciation of $58.5 million and $54.5 million for Alliant Energy as of December 31, 2019 and 2018, respectively.

(c)

Less accumulated depreciation of $172.4 million and $167.5 million for Alliant Energy as of December 31, 2019 and 2018, respectively.

The amount of AFUDC generated by equity and debt components was as follows (in millions):