RELATED PARTIES (Tables)

6 Months Ended

Jun. 30, 2018

Our balance sheets included the following receivables and payables related to transactions entered into with certain related parties:



(in millions)	June 30, 2018		December 31, 2017
Accounts receivable
Services provided to ATC	$	0.5	$	0.7
Accounts payable
Network transmission services from ATC	8.8		9.0
Liability related to income tax allocation
Integrys	3.8		4.1

Schedule of activity associated with related party transactions

The following table shows activity associated with our related party transactions:



	Three Months Ended June 30				Six Months Ended June 30
(in millions)	2018		2017		2018		2017
Transactions with WE ⁽¹⁾
Billings to WE	$	1.9	$	1.1	$	5.1	$	2.2
Billings from WE	4.3		5.2		7.3		7.7
Transactions with WBS ⁽¹⁾
Billings to WBS ⁽²⁾	0.3		4.2		0.5		168.3
Billings from WBS ⁽³⁾	32.5		35.3		85.0		68.2
Transactions with UMERC
Electric sales to UMERC	4.0		4.0		7.7		8.1
Natural gas sales to UMERC	0.3		0.5		1.5		1.6
Transactions with Bluewater ⁽⁴⁾
Storage service fees	1.5		—		1.7		—
Transactions related to ATC
Charges to ATC for services and construction	1.5		1.4		3.0		2.8
Charges from ATC for network transmission services	26.5		26.9		53.0		53.9
Refund from ATC related to a FERC audit	6.6		—		6.6		—
Refund from ATC per FERC ROE order	—		—		—		8.9
Transactions with WRPC
Rental payments to WRPC ⁽⁵⁾	0.4		0.4		0.7		0.5
Purchases of energy from WRPC ⁽⁵⁾	—		—		—		0.5
Charges from WRPC for services	0.6		0.6		1.2		0.8
Charges to WRPC for operations	0.2		0.3		0.4		0.5


⁽¹⁾	Includes amounts billed for services, pass through costs, and other items in accordance with approved affiliated interest agreements.

⁽²⁾

The six months ended June 30, 2017 included $161.9 million of cash received related to our transfer of pension trust assets in conjunction with the Integrys pension plan split. Effective January 1, 2017, the Integrys Energy Group Retirement Plan was split into six separate plans. As a result, we now have our own pension plan. While the split did not impact our pension benefit obligation, federal regulations required a different allocation of assets among the new plans. Assets were transferred out of our plan in January 2017. There were no transfers of assets to WBS for the three and six months ended June 30, 2018, or for the three months ended June 30, 2017.


⁽³⁾	Includes $5.8 million and $29.1 million for the transfer of certain software assets from WBS for the three and six months ended June 30, 2018, respectively. The three and six months ended June 30, 2017 included $9.2 million for the transfer of certain software assets to us.


⁽⁴⁾	WEC Energy Group's acquisition of Bluewater was completed June 30, 2017. See below for more information.


⁽⁵⁾	In March 2017, we terminated our power purchase agreement with WRPC and entered into an agreement with WRPC to rent 50% of its hydroelectric power generation facilities.