Segment Information Products and Services (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from External Customer [Line Items]
Consolidated revenues by product line	100.00%	100.00%	100.00%
Sales Revenue, Net [Member] | Product Concentration Risk [Member] | Production [Member]
Revenue from External Customer [Line Items]
Consolidated revenues by product line	27.00%	26.00%	29.00%
Sales Revenue, Net [Member] | Product Concentration Risk [Member] | Completion [Member]
Revenue from External Customer [Line Items]
Consolidated revenues by product line	21.00%	22.00%	20.00%
Sales Revenue, Net [Member] | Product Concentration Risk [Member] | Drilling and Evaluation [Member]
Revenue from External Customer [Line Items]
Consolidated revenues by product line	25.00%	24.00%	22.00%
Sales Revenue, Net [Member] | Product Concentration Risk [Member] | Well Construction [Member]
Revenue from External Customer [Line Items]
Consolidated revenues by product line	27.00%	28.00%	29.00%