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Business Combinations and Divestitures Carrying Amounts of the Major Assets and Liabilities Classes (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Mar. 28, 2018	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jul. 11, 2018	Dec. 29, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration								$ 430.0
Gain (Loss) on Disposition of Business				$ 0.0	$ 96.0	$ 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
Disposal Group, Including Discontinued Operation, Other Liabilities		36.0		36.0
Escrow Deposit Liability		11.0		11.0			$ 43.0
Disposal Group, Including Discontinued Operation, Consideration		216.0		$ 216.0			$ 287.5
Gain (Loss) on Disposition of Business		$ 9.0
Discontinued Operations, Disposed of by Sale [Member] \| U.S. Pressure Pumping and Pump-Down [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Goodwill					162.0
Disposal Group, Including Discontinued Operation, Inventory, Current					7.0
Disposal Group, Including Discontinued Operation, Assets					391.0
Disposal Group, Including Discontinued Operation, Other Liabilities					52.0
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent					$ 222.0
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, Goodwill	$ 8.0
Disposal Group, Including Discontinued Operation, Inventory, Current	1.0
Disposal Group, Including Discontinued Operation, Assets	23.0
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	14.0
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