Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

The following table presents the remaining intangible assets balance as of December 31, 2018 and 2017:

	2018		2017
	(In millions)
Cost	$	—	$	10.1
Accumulated amortization		—		(1.9	)
Intangible assets, net	$	—	$	8.2

Schedule of Changes in Intangible Assets

The following table presents the changes in intangible assets:

	Intangible Assets
	(In millions)
December 31, 2017	$	8.2
Amortization		(1.9	)
Impairment charges		(6.3	)
December 31, 2018	$	—

Schedule of Amortization Expense for Intangible Assets

Amortization expense from continuing operations for intangible assets consisted of the following:

	Years Ended December 31,
	2018		2017
	(In millions)
Amortization expense	$	1.9	$	1.9

Schedule of Intangible Assets Estimated Amortization Expense

Based on the intangible assets in service as of December 31, 2018, estimated amortization expenses for each of the next five years ending December 31 is as follows:

	2019		2020		2021		2022		2023
		(In millions)
Amortization expense	$	—	$	—	$	—	$	—	$	—