X0304 4 2011-08-11 false 0001038357 PIONEER NATURAL RESOURCES CO PXD 0001034307 DOVE TIMOTHY L 5205 N. O'CONNOR BLVD., SUITE 200 IRVING TX 75039 false true false false President & COO Common Stock 351 I 401(k) Common Stock 2011-08-11 4 S false 200 75.92 D 256164 D Common Stock 2011-08-11 4 S false 100 75.99 D 256064 D Common Stock 2011-08-11 4 S false 100 75.94 D 255964 D Common Stock 2011-08-11 4 S false 200 76.99 D 255764 D Common Stock 2011-08-11 4 S false 200 77.11 D 255564 D Common Stock 2011-08-11 4 S false 200 77.21 D 255364 D Common Stock 2011-08-11 4 S false 200 77.31 D 255164 D Common Stock 2011-08-11 4 S false 200 77.51 D 254964 D Common Stock 2011-08-11 4 S false 200 77.85 D 254764 D Common Stock 2011-08-11 4 S false 300 77.89 D 254464 D Common Stock 2011-08-11 4 S false 100 77.41 D 254364 D Common Stock 2011-08-11 4 S false 100 77.87 D 254264 D Common Stock 2011-08-11 4 S false 300 77.97 D 253964 D Common Stock 2011-08-11 4 S false 200 77.91 D 253764 D Common Stock 2011-08-11 4 S false 400 78.14 D 253364 D Common Stock 2011-08-11 4 S false 200 78.14 D 253164 D Common Stock 2011-08-11 4 S false 300 78.23 D 252864 D Common Stock 2011-08-11 4 S false 250 78.24 D 252614 D Common Stock 2011-08-11 4 S false 250 78.31 D 252364 D Consists of shares beneficially owned as a result of reporting person's ownership of units in the Pioneer Natural Resources USA, Inc. 401(k) Mark H. Kleinman, Attorney-in-Fact for Timothy L. Dove 2011-08-15