Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	1-13245
Entity Registrant Name	PIONEER NATURAL RESOURCES CO
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-2702753
Entity Address, Address Line One	777 Hidden Ridge
Entity Address, City or Town	Irving
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75038
City Area Code	972
Local Phone Number	444-9001
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	PXD
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 39,435,041,959
Entity Common Stock, Shares Outstanding		242,884,015
Entity Central Index Key	0001038357
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Auditor Firm ID	42
Auditor Location	Dallas, Texas
Auditor Name	Ernst & Young LLP
Documents Incorporated by Reference	Portions of the Definitive Proxy Statement for the Company's Annual Meeting of Shareholders to be held in May 2022 are incorporated into Part III of this Report.