Business Combinations and Divestitures Carrying Amounts of the Major Assets and Liabilities Classes (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended		11 Months Ended	12 Months Ended
	Mar. 28, 2018	Dec. 31, 2019	Mar. 31, 2020	Dec. 31, 2018	Dec. 13, 2019	Dec. 31, 2020	Dec. 31, 2018	Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business		$ 0.0			$ 112.0	$ 0.0	$ 0.0
Discontinued Operations, Disposed of by Sale [Member] | Land Drilling Rig [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets				$ 253.0			253.0	$ 66.0
Disposal Group, Including Discontinued Operation, Other Liabilities				36.0			36.0
Disposal Group, Including Discontinued Operation, Consideration		$ 288.0		216.0			$ 216.0	$ 72.0
Gain (Loss) on Disposition of Business			$ 6.0	$ 9.0
Discontinued Operations, Disposed of by Sale [Member] | Conventional Continuous Sucker Rod Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	$ 25.0
Gain (Loss) on Disposition of Business	$ 2.0
Discontinued Operations, Disposed of by Sale [Member] | sale of equity investment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration						$ 12.5
Gain (Loss) on Disposition of Business			$ 3.0