Non-operating Income (Expense) (Tables)

9 Months Ended

Sep. 30, 2020

Nonoperating Income (Expense) [Abstract]

Schedule of Other Nonoperating Income (Expense) [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Interest expense	$	(11.7)	$	(12.8)	$	(35.4)	$	(37.4)
Capitalized interest	—		0.3		—		5.7
Amortization of debt issuance costs	(0.5)		(0.5)		(1.7)		(1.5)
Interest income	—		—		—		0.7
Interest expense, net	(12.2)		(13.1)		(37.0)		(32.5)
Debt retirement costs	(3.9)		(2.7)		(4.8)		(2.7)
Non-operating pension and other postretirement employee benefits expense	(1.9)		(1.4)		(5.7)		(4.3)
Total non-operating expense	$	(17.9)	$	(17.2)	$	(47.5)	$	(39.5)