Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2015

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Share Based Incentive Award Activity

The following table summarizes the activity that occurred during the six months ended June 30, 2015, for each type of share-based incentive award issued by Pioneer:

	Restricted Stock Equity Awards		Restricted Stock Liability Awards		Performance Units	Stock Options
Outstanding as of December 31, 2014	1,233,539		328,087		154,733	199,058
Awards granted	435,462		158,726		82,431	—
Awards vested	(508,335	)	(173,759	)	—	—
Awards forfeited	(10,859	)	(13,997	)	—	—
Outstanding as of June 30, 2015	1,149,807		299,057		237,164	199,058