Acquisitions & Divestitures Schedule of Assets and Liabilities Held for Sale (Tables)

12 Months Ended

Dec. 31, 2018

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

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 related to the Haynesville Divestiture classified as noncurrent assets and liabilities held for sale on the Condensed 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
Other long-term liabilities	0.3
Other long-term liabilities held for sale	$	61.3