Derivative Financial Instruments (Narrative) (Details) $ in Millions	Sep. 30, 2016 USD ($) bbl / d $ / bbl Rate
Trading Activity, Gains and Losses, Net [Line Items]
Derivative, Fixed Interest Rate \| Rate	1.94%
Notional amount of debt \| $	$ 250
Diesel Swap Year 2 [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Derivative, Nonmonetary Notional Amount \| bbl / d	1,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	60.48

- Definition

Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

Name:	invest_DerivativeNonmonetaryNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Swap Contract Notional Amount Fixed Rate of Interest and Variable LIBOR

+ References

No definition available.

+ Details

Name:	pxd_SwapContractNotionalAmountFixedRateOfInterestAndVariableLibor
Namespace Prefix:	pxd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeSwapTypeAverageFixedPrice
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_TradingActivityGainsAndLossesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=pxd_DieselSwapYear2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: