Business Segment and Geographic Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting [Abstract]
Depreciation, Depletion and Amortization	$ 277	$ 263
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization	277	263
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	25,179		$ 25,587
Completion And Production [Member]
Segment Reporting [Abstract]
Cost, Direct Material	1,300	1,392
Cost, Direct Labor	474	484
Depreciation, Depletion and Amortization	152	144
Other Cost of Operating Revenue	663	665
Operating Expenses	2,589	2,685
Segment Reporting Information [Line Items]
Operating Expenses	2,589	2,685
Cost, Direct Material	1,300	1,392
Cost, Direct Labor	474	484
Depreciation, Depletion and Amortization	152	144
Other Cost of Operating Revenue	663	665
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	12,169		11,987
Drilling And Evaluation [Member]
Segment Reporting [Abstract]
Cost, Direct Material	882	977
Cost, Direct Labor	467	465
Depreciation, Depletion and Amortization	121	115
Other Cost of Operating Revenue	475	476
Operating Expenses	1,945	2,033
Segment Reporting Information [Line Items]
Operating Expenses	1,945	2,033
Cost, Direct Material	882	977
Cost, Direct Labor	467	465
Depreciation, Depletion and Amortization	121	115
Other Cost of Operating Revenue	475	476
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	7,972		7,806
Corporate Segment and Other Operating Segment [Member]
Segment Reporting [Abstract]
Depreciation, Depletion and Amortization	4	4
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization	4	$ 4
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 5,038		$ 5,794