Risk Management Activities (Tables)

12 Months Ended

Dec. 31, 2018

Risk Management Activities [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

Risk management assets and liabilities on our derivatives are presented on the Consolidated Balance Sheets as shown below:

December 31, (in millions)	2018		2017
Risk Management Assets - Current(1)
Interest rate risk programs	$	—	$	14.0
Commodity price risk programs	1.1		0.5
Total	$	1.1	$	14.5
Risk Management Assets - Noncurrent(2)
Interest rate risk programs	$	18.5	$	5.6
Commodity price risk programs	4.4		1.0
Total	$	22.9	$	6.6
Risk Management Liabilities - Current
Interest rate risk programs	$	—	$	38.6
Commodity price risk programs	5.0		4.6
Total	$	5.0	$	43.2
Risk Management Liabilities - Noncurrent
Interest rate risk programs	$	9.5	$	—
Commodity price risk programs	37.2		28.5
Total	$	46.7	$	28.5

⁽¹⁾Presented in "Prepayments and other" on the Consolidated Balance Sheets.

⁽²⁾Presented in "Deferred charges and other" on the Consolidated Balance Sheets.