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Acquisitions and Divestitures - Divestitures (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposition of business	$ 0.0	$ 8.0	$ 0.0	$ (104.0)
Discontinued Operations, Disposed of by Sale \| Disposed Reservoir Solutions and Surface Data Logging Businesses [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration transferred		256.0		256.0
Loss on disposition of business				117.0
Divestitures, assets		95.0		95.0
Discontinued Operations, Disposed of by Sale \| Land Drilling Rigs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration transferred		288.0		288.0	$ 72.0
Loss on disposition of business				6.0
Divestitures, assets		$ 66.0		$ 66.0