Incentive Plans (Tables)

9 Months Ended

Sep. 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 nine months ended September 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	439,742		158,726		82,431	—
Awards vested	(525,494	)	(185,302	)	—	—
Awards forfeited	(36,679	)	(28,851	)	—	—
Outstanding as of September 30, 2015	1,111,108		272,660		237,164	199,058