Incentive Program (Narrative) (Details) shares in Thousands, $ in Millions		12 Months Ended
	May 03, 2024 installment shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares
Long-term incentive awards (in shares)		10,496
Vested (shares)		(8,185)
Forfeited (shares)		(528)
2003 Incentive Program
Minimum ownership of affiliates needed for awards		50.00%
Options and stock appreciation rights grant, minimum percentage of market value, date of grant		100.00%
Share-based compensation arrangement by share-based payment award expiration period		10 years
Number of shares issuable under incentive program, maximum		220,000
Remaining shares available for award incentive program		47,000
Restricted Stock [Member]
Long-term incentive awards (in shares)		10,393	9,701	9,392
Percent of the shares in each award vesting after three years		50.00%
Percent of the shares in each award vesting after seven years		50.00%
Percent of shares in each award vesting after five years		50.00%
Percent of shares in each award vesting in later of ten years or retirement		50.00%
Unrecognized compensation cost | $		$ 2,588
Unrecognized compensation cost, weighted-average period of recognition, years		4 years 7 months 6 days
Compensation cost charged against income | $		$ 835	$ 611	$ 648
Income tax benefit recognized in income | $		73	50	52
Fair value of shares/awards vested | $		980	892	1,027
Cash payments, vested restricted stock units | $		$ 87	$ 79	$ 89
Restricted Stock [Member] | Pioneer Amended And Restated 2006 Long Term Incentive Plan
Share-based compensation arrangement by share-based payment award expiration period	3 years
Number of shares issuable under incentive program, maximum	9,458
Remaining shares available for award incentive program		9,362
Long-term incentive awards (in shares)		760
Vesting period	3 years
Share-based compensation arrangement by share-based payment Award, Number Of Vesting Installments | installment	3
Vested (shares)		(67)
Forfeited (shares)		(209)
Restricted Stock [Member] | Share-based Payment Arrangement, Tranche One [Member] | Pioneer Amended And Restated 2006 Long Term Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage	33.33%
Restricted Stock [Member] | Share-based Payment Arrangement, Tranche Two [Member] | Pioneer Amended And Restated 2006 Long Term Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage	33.33%
Restricted Stock [Member] | Share-Based Payment Arrangement, Tranche Three | Pioneer Amended And Restated 2006 Long Term Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage	33.33%
Restricted Stock [Member] | Management, Professional, And Technical Participants
Vesting period		3 years
Restricted Stock [Member] | Minimum [Member]
Vesting period		3 years
Restricted Stock [Member] | Minimum [Member] | Executive Officer [Member]
Vesting period		5 years
Restricted Stock [Member] | Maximum [Member]
Vesting period		7 years
Restricted Stock [Member] | Maximum [Member] | Executive Officer [Member] | Share-based Payment Arrangement, Tranche One [Member]
Vesting period		10 years
Restricted Stock [Member] | Maximum [Member] | Executive Officer [Member] | Share-based Payment Arrangement, Tranche Two [Member]
Vesting period		10 years