Impairment and Other Charges (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Long-lived asset impairments		$ 0		$ 2,629	$ 1,603
Inventory costs and write-downs		0		505	458
Severance		15		384	172
Joint ventures		0		0	154
Other		35		281	119
Total impairments and other charges	[1]	12		3,799	2,506
Impairment of real estate properties				616
Impairment of drilling-services equipment				297
Impairment of hydraulic fracturing equipment				1,000	759
Impairment of real estate facilities					215
Impairment of legacy drilling equipment					243
Impairment of intangible assets				131	98
Impairment of right-of-use assets associated with operating leases				191	139
Impairment of other fixed assets				394	148
Restructuring and Related Cost, Accelerated Depreciation		36		0	0
Right-of-Use Assets Obtained in Exchange for Operating Lease Liability		433	[2]	447	1,362
Impairments and other charges		12		3,799	2,506
Impairment of hydraulic fracturing equipment				1,000	759
Impairment of legacy drilling equipment					243
Impairment of real estate facilities					215
Impairment of right-of-use assets associated with operating leases				191	139
Impairment of intangible assets				131	98
Impairment of other fixed assets				394	148
Structured Real Estate Transaction
Restructuring Cost and Reserve [Line Items]
Sale and Leaseback Transaction, Gain (Loss), Net		(74)		0	0
Disposal Group, Including Discontinued Operation, Assets, Current		358
Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures		$ 349
LesseeOperatingLeaseVariableLeasePaymentTermsPercentage		1.35%
Right-of-Use Assets Obtained in Exchange for Operating Lease Liability		$ 276
Increase (Decrease) in Operating Lease Liability		276
Proceeds from Sale of Real Estate Held-for-investment		$ 87		0	0
Lessee, Operating Lease, Renewal Term		5 years
Lessee, Operating Lease, Existence of Option to Extend [true false]		true
Minimum lease term
Restructuring Cost and Reserve [Line Items]
Sale Leaseback Transaction, Lease Terms		twelve
Maximum lease term
Restructuring Cost and Reserve [Line Items]
Sale Leaseback Transaction, Lease Terms		fifteen
Number of options to extend
Restructuring Cost and Reserve [Line Items]
Lessee, Operating Lease, Option to Extend		two
Completion and Production
Restructuring Cost and Reserve [Line Items]
Total impairments and other charges		$ 42		2,400	1,600
Drilling and Evaluation
Restructuring Cost and Reserve [Line Items]
Total impairments and other charges		9		1,400	849
Corporate and Other [Member]
Restructuring Cost and Reserve [Line Items]
Total impairments and other charges		$ (39)		$ 62	$ 56

[1] Impairments and other charges are as follows: -For the year ended December 31, 2021, amount includes approximately $42 million attributable to Completion and Production, $9 million attributable to Drilling and Evaluation, and a $39 million net gain attributable to Corporate and other. -For the year ended December 31, 2020, amount includes approximately $2.4 billion attributable to Completion and Production, $1.4 billion attributable to Drilling and Evaluation, and $62 million attributable to Corporate and other. -For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other.

[2]