Acquisitions and Divestitures (Tables)

12 Months Ended

Dec. 31, 2019

Discontinued Operations and Disposal Groups [Abstract]

Noncurrent Assets and Liabilities Held For Sale [Table Text Block]

The following table presents the carrying amounts of the major classes of assets and liabilities classified as noncurrent assets and liabilities held for sale on the Consolidated Balance Sheets:

	December 31, 2018 (1)
	(in millions)
Assets
Current assets, total	$	1.2
Property, Plant and Equipment	683.7
Other noncurrent assets	7.8
Noncurrent assets held for sale	$	692.7
Liabilities
Current liabilities, total	$	3.4
Asset retirement obligations, current	0.7
Asset retirement obligations, long-term	56.9
Fair value of derivative contracts, long-term	—
Other long-term liabilities	0.3
Other long-term liabilities held for sale	$	61.3