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Stock-Based Compensation and Awards - Restricted Stock (Details 6)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
$ / shares
shares
Restricted stock, restricted stock units, performance units, cash settled restricted stock units and cash settled performance units  
Shares  
Non-vested awards at the beginning of the period, in shares 1,170
Granted, in shares 1,008
Vested, in shares (809)
Canceled, in shares (53)
Spin-off of Exterran Corporation, shares (161)
Non-vested awards at the end of the period, in shares 1,155
Weighted Average Grant-Date Fair Value Per Share  
Non-vested awards at the beginning of the period (in dollars per share) | $ / shares $ 27.37
Granted (in dollars per share) | $ / shares 25.49
Vested (in dollars per share) | $ / shares 23.05
Cancelled (in dollars per share) | $ / shares 30.25
Spin-off of Exterran Corporation (in dollars per share) | $ / shares (99.93)
Non-vested awards at the end of the period (in dollars per share) | $ / shares $ 18.50
Unrecognized compensation  
Expected unrecognized compensation cost related to unvested awards (in dollars) | $ $ 11.7
Weighted-average period over which the expected unrecognized compensation cost related to unvested stock options will be recognized 1 year 9 months 18 days
Restricted stock, restricted stock units, performance units, cash settled restricted stock units and cash settled performance units | First anniversary vesting  
Unrecognized compensation  
Vesting percentage 33.33%
Vesting period 1 year
Restricted stock, restricted stock units, performance units, cash settled restricted stock units and cash settled performance units | Second anniversary vesting  
Unrecognized compensation  
Vesting percentage 33.33%
Vesting period 2 years
Restricted stock, restricted stock units, performance units, cash settled restricted stock units and cash settled performance units | Third anniversary vesting  
Unrecognized compensation  
Vesting percentage 33.33%
Vesting period 3 years
Cash settled restricted stock units and cash settled performance units  
Shares  
Non-vested awards at the end of the period, in shares 55
Restricted shares, restricted stock units and performance units  
Shares  
Non-vested awards at the end of the period, in shares 1,100