Amount classified as assets attributable to disposal group held for sale or disposed of.

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Business Combinations and Divestitures - Divestitures Narrative (Details) - Discontinued Operations, Disposed of by Sale - USD ($) $ in Millions		3 Months Ended
	Mar. 28, 2018	Mar. 31, 2019	Dec. 31, 2018	Jul. 11, 2018
Land Drilling Rigs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration		$ 72.0		$ 287.5
Escrow Deposit Liability			$ 11.0
Gain (Loss) on Disposition of Business		6.0
Disposal Group, Including Discontinued Operation, Assets		$ 66.0
Conventional Continuous Sucker Rod Business
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
Disposal Group, Including Discontinued Operation, Assets	$ 23.0