Litigation (Details) - WesternGeco [Member] $ in Millions			1 Months Ended					36 Months Ended
	Mar. 14, 2017 USD ($)	Nov. 25, 2016 USD ($)	May 31, 2014 USD ($)	Apr. 30, 2014 USD ($)	Oct. 31, 2013 USD ($)	Aug. 31, 2012 USD ($)	Jun. 30, 2009 Patent	Jul. 02, 2015 USD ($)	Nov. 14, 2016 USD ($)	Nov. 13, 2016 USD ($)
Loss Contingencies [Line Items]
Number of patent apparatus claims contained | Patent							4
Pending Litigation [Member]
Loss Contingencies [Line Items]
Damages awarded	$ 5.0		$ 123.8	$ 9.4	$ 73.1	$ 105.9
Reduction in damages award in the case				$ (3.0)
Prejudgment interest expense accrued								$ 10.9
Amount of appeal bond									$ 65.0	$ 120.0
Amount of royalty damages paid		$ 20.8
Pending Litigation [Member] | Lost Royalties [Member]
Loss Contingencies [Line Items]
Damages awarded						$ 12.5
Pending Litigation [Member] | Lost Profits [Member]
Loss Contingencies [Line Items]
Damages awarded								$ 93.4