Related Parties (Tables)

6 Months Ended

Jun. 30, 2020

Related Party Transactions [Line Items]

Services Provided, Sales Credited And Purchases

The amounts billed for services provided, sales credited and purchases for the three and six months ended June 30 were as follows (in millions):

	IPL								WPL
	Three Months				Six Months				Three Months				Six Months
	2020		2019		2020		2019		2020		2019		2020		2019
Corporate Services billings		$44		$47		$81		$90		$35		$35		$67		$68
Sales credited	10		12		25		27		2		3		4		4
Purchases billed	57		74		138		158		20		29		40		59

Net Intercompany Payables

Net intercompany payables to Corporate Services were as follows (in millions):

	IPL		WPL
	June 30, 2020	December 31, 2019	June 30, 2020	December 31, 2019
Net payables to Corporate Services	$93	$112	$65	$85

Related Amounts Billed Between Parties

The related amounts billed between the parties for the three and six months ended June 30 were as follows (in millions):

	Three Months				Six Months
	2020		2019		2020		2019
ATC billings to WPL		$25		$27		$53		$54
WPL billings to ATC	3		3		6		7

IPL [Member]

Related Party Transactions [Line Items]

Services Provided, Sales Credited And Purchases

The amounts billed for services provided, sales credited and purchases for the three and six months ended June 30 were as follows (in millions):

	IPL								WPL
	Three Months				Six Months				Three Months				Six Months
	2020		2019		2020		2019		2020		2019		2020		2019
Corporate Services billings		$44		$47		$81		$90		$35		$35		$67		$68
Sales credited	10		12		25		27		2		3		4		4
Purchases billed	57		74		138		158		20		29		40		59

Net Intercompany Payables

Net intercompany payables to Corporate Services were as follows (in millions):

	IPL		WPL
	June 30, 2020	December 31, 2019	June 30, 2020	December 31, 2019
Net payables to Corporate Services	$93	$112	$65	$85

WPL [Member]

Related Party Transactions [Line Items]

Services Provided, Sales Credited And Purchases

The amounts billed for services provided, sales credited and purchases for the three and six months ended June 30 were as follows (in millions):

	IPL								WPL
	Three Months				Six Months				Three Months				Six Months
	2020		2019		2020		2019		2020		2019		2020		2019
Corporate Services billings		$44		$47		$81		$90		$35		$35		$67		$68
Sales credited	10		12		25		27		2		3		4		4
Purchases billed	57		74		138		158		20		29		40		59

Net Intercompany Payables

Net intercompany payables to Corporate Services were as follows (in millions):

	IPL		WPL
	June 30, 2020	December 31, 2019	June 30, 2020	December 31, 2019
Net payables to Corporate Services	$93	$112	$65	$85

Related Amounts Billed Between Parties

The related amounts billed between the parties for the three and six months ended June 30 were as follows (in millions):

	Three Months				Six Months
	2020		2019		2020		2019
ATC billings to WPL		$25		$27		$53		$54
WPL billings to ATC	3		3		6		7