X0304 4 2011-06-07 false 0001038357 PIONEER NATURAL RESOURCES CO PXD 0001034310 RAMSEY CHARLES E JR 5205 N. O'CONNOR BLVD., SUITE 200 IRVING TX 75039 true false false false Common Stock 18409 I by Trust Common Stock 2011-06-07 5 G false 1057 0 A 17734 I by Trust Common Stock 2011-06-07 5 G false 1057 0 D 7117 D Common Stock 2011-09-07 5 G false 675 0 A 18409 I by Trust Common Stock 2011-09-07 5 G false 675 0 D 6442 D Common Stock 2011-11-14 4 S false 100 92.33 D 6342 D Common Stock 2011-11-14 4 S false 200 92.34 D 6142 D Common Stock 2011-11-14 4 S false 200 92.36 D 5942 D Common Stock 2011-11-14 4 S false 700 92.37 D 5242 D Common Stock 2011-11-14 4 S false 400 92.42 D 4842 D Common Stock 2011-11-14 4 S false 700 92.4285 D 4142 D Common Stock 2011-11-14 4 S false 500 92.44 D 3642 D Common Stock 2011-11-14 4 S false 100 92.445 D 3542 D Common Stock 2011-11-14 4 S false 200 92.46 D 3342 D Common Stock 2011-11-14 4 S false 200 92.47 D 3142 D Common Stock 2011-11-14 4 S false 100 92.48 D 3042 D Common Stock 2011-11-14 4 S false 100 92.485 D 2942 D Common Stock 2011-11-14 4 S false 900 92.4939 D 2042 D Common Stock 2011-11-14 4 S false 100 92.5 D 1942 D Common Stock 2011-11-14 4 S false 300 92.5333 D 1642 D Common Stock 2011-11-14 4 S false 100 92.56 D 1542 D Common Stock 2011-11-14 4 S false 100 92.58 D 1442 D Mark H. Kleinman, Attorney-in-Fact For Charles E. Ramsey, Jr. 2011-11-16