Revenues (Tables)

9 Months Ended

Sep. 30, 2020

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Disaggregation of revenues from contracts with customers, which correlates to revenues for each reportable segment, was as follows (in millions):

	Alliant Energy				IPL				WPL
Three Months Ended September 30	2020		2019		2020		2019		2020		2019
Electric Utility:
Retail - residential		$328		$332		$189		$196		$139		$136
Retail - commercial	210		231		142		158		68		73
Retail - industrial	241		264		149		158		92		106
Wholesale	47		50		17		18		30		32
Bulk power and other	26		39		22		31		4		8
Total Electric Utility	852		916		519		561		333		355
Gas Utility:
Retail - residential	22		20		12		12		10		8
Retail - commercial	10		10		6		6		4		4
Retail - industrial	2		3		1		2		1		1
Transportation/other	8		9		5		5		3		4
Total Gas Utility	42		42		24		25		18		17
Other Utility:
Steam	8		9		8		9		—		—
Other utility	2		2		2		2		—		—
Total Other Utility	10		11		10		11		—		—
Non-Utility and Other:
Transportation and other	16		21		—		—		—		—
Total Non-Utility and Other	16		21		—		—		—		—
Total revenues		$920		$990		$553		$597		$351		$372

	Alliant Energy				IPL				WPL
Nine Months Ended September 30	2020		2019		2020		2019		2020		2019
Electric Utility:
Retail - residential		$845		$840		$472		$470		$373		$370
Retail - commercial	556		583		371		386		185		197
Retail - industrial	648		686		384		392		264		294
Wholesale	127		137		44		49		83		88
Bulk power and other	81		104		61		76		20		28
Total Electric Utility	2,257		2,350		1,332		1,373		925		977
Gas Utility:
Retail - residential	146		187		79		109		67		78
Retail - commercial	70		90		38		50		32		40
Retail - industrial	8		10		5		7		3		3
Transportation/other	29		36		19		22		10		14
Total Gas Utility	253		323		141		188		112		135
Other Utility:
Steam	27		27		27		27		—		—
Other utility	5		6		4		5		1		1
Total Other Utility	32		33		31		32		1		1
Non-Utility and Other:
Transportation and other	57		62		—		—		—		—
Total Non-Utility and Other	57		62		—		—		—		—
Total revenues		$2,599		$2,768		$1,504		$1,593		$1,038		$1,113

IPL [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Disaggregation of revenues from contracts with customers, which correlates to revenues for each reportable segment, was as follows (in millions):

	Alliant Energy				IPL				WPL
Three Months Ended September 30	2020		2019		2020		2019		2020		2019
Electric Utility:
Retail - residential		$328		$332		$189		$196		$139		$136
Retail - commercial	210		231		142		158		68		73
Retail - industrial	241		264		149		158		92		106
Wholesale	47		50		17		18		30		32
Bulk power and other	26		39		22		31		4		8
Total Electric Utility	852		916		519		561		333		355
Gas Utility:
Retail - residential	22		20		12		12		10		8
Retail - commercial	10		10		6		6		4		4
Retail - industrial	2		3		1		2		1		1
Transportation/other	8		9		5		5		3		4
Total Gas Utility	42		42		24		25		18		17
Other Utility:
Steam	8		9		8		9		—		—
Other utility	2		2		2		2		—		—
Total Other Utility	10		11		10		11		—		—
Non-Utility and Other:
Transportation and other	16		21		—		—		—		—
Total Non-Utility and Other	16		21		—		—		—		—
Total revenues		$920		$990		$553		$597		$351		$372

	Alliant Energy				IPL				WPL
Nine Months Ended September 30	2020		2019		2020		2019		2020		2019
Electric Utility:
Retail - residential		$845		$840		$472		$470		$373		$370
Retail - commercial	556		583		371		386		185		197
Retail - industrial	648		686		384		392		264		294
Wholesale	127		137		44		49		83		88
Bulk power and other	81		104		61		76		20		28
Total Electric Utility	2,257		2,350		1,332		1,373		925		977
Gas Utility:
Retail - residential	146		187		79		109		67		78
Retail - commercial	70		90		38		50		32		40
Retail - industrial	8		10		5		7		3		3
Transportation/other	29		36		19		22		10		14
Total Gas Utility	253		323		141		188		112		135
Other Utility:
Steam	27		27		27		27		—		—
Other utility	5		6		4		5		1		1
Total Other Utility	32		33		31		32		1		1
Non-Utility and Other:
Transportation and other	57		62		—		—		—		—
Total Non-Utility and Other	57		62		—		—		—		—
Total revenues		$2,599		$2,768		$1,504		$1,593		$1,038		$1,113

WPL [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Disaggregation of revenues from contracts with customers, which correlates to revenues for each reportable segment, was as follows (in millions):

	Alliant Energy				IPL				WPL
Three Months Ended September 30	2020		2019		2020		2019		2020		2019
Electric Utility:
Retail - residential		$328		$332		$189		$196		$139		$136
Retail - commercial	210		231		142		158		68		73
Retail - industrial	241		264		149		158		92		106
Wholesale	47		50		17		18		30		32
Bulk power and other	26		39		22		31		4		8
Total Electric Utility	852		916		519		561		333		355
Gas Utility:
Retail - residential	22		20		12		12		10		8
Retail - commercial	10		10		6		6		4		4
Retail - industrial	2		3		1		2		1		1
Transportation/other	8		9		5		5		3		4
Total Gas Utility	42		42		24		25		18		17
Other Utility:
Steam	8		9		8		9		—		—
Other utility	2		2		2		2		—		—
Total Other Utility	10		11		10		11		—		—
Non-Utility and Other:
Transportation and other	16		21		—		—		—		—
Total Non-Utility and Other	16		21		—		—		—		—
Total revenues		$920		$990		$553		$597		$351		$372

	Alliant Energy				IPL				WPL
Nine Months Ended September 30	2020		2019		2020		2019		2020		2019
Electric Utility:
Retail - residential		$845		$840		$472		$470		$373		$370
Retail - commercial	556		583		371		386		185		197
Retail - industrial	648		686		384		392		264		294
Wholesale	127		137		44		49		83		88
Bulk power and other	81		104		61		76		20		28
Total Electric Utility	2,257		2,350		1,332		1,373		925		977
Gas Utility:
Retail - residential	146		187		79		109		67		78
Retail - commercial	70		90		38		50		32		40
Retail - industrial	8		10		5		7		3		3
Transportation/other	29		36		19		22		10		14
Total Gas Utility	253		323		141		188		112		135
Other Utility:
Steam	27		27		27		27		—		—
Other utility	5		6		4		5		1		1
Total Other Utility	32		33		31		32		1		1
Non-Utility and Other:
Transportation and other	57		62		—		—		—		—
Total Non-Utility and Other	57		62		—		—		—		—
Total revenues		$2,599		$2,768		$1,504		$1,593		$1,038		$1,113