Bradley Agreement (Tables)

9 Months Ended

Sep. 30, 2020

Contractors [Abstract]

Schedule of Deficiency Payments made, Net of Reimbursements

The total deficiency repayments (net of payments made), interest and premium received and recognized under the Bradley Agreement for the three and nine months ended September 30, 2020 and 2019 were as follows:

	Three Months Ended				Nine Months Ended
(millions) (unaudited)	September 30, 2020		September 30, 2019		September 30, 2020		September 30, 2019
Deficiency repayments	$	—	$	0.4	$	0.1	$	2.8
Interest		—		0.3		0.1		0.8
Premium		—		—		—		0.3