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2421405 - Disclosure - Share-Based Compensation - Restricted Stock Activity Table (Detail)
(http://www.anadarko.com/role/ShareBasedCompensationRestrictedStockActivityTableDetail)
TableSchedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000773910 (http://www.sec.gov/CIK)
Award Type [Axis]Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Restricted Stock Shares [Roll Forward]
 
 
 
Non-vested at January 1, 2016
3,980,000  
  
Granted
3,110,000  
  
Vested
(2,430,000) 
  
Forfeited
(120,000) 
  
Non-vested at December 31, 2016
4,540,000  
 
3,980,000  
 
 
 
Restricted Stock Weighted-Average Grant-Date Fair Value [Abstract]
 
 
 
Non-vested at January 1, 2016
82.39  
  
Granted
52.03  
79.40  
87.42  
Vested
81.19  
  
Forfeited
63.78  
  
Non-vested at December 31, 2016
62.74  
82.39