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Stock-based Compensation Plans (Tables) | 9 Months Ended
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Jun. 30, 2017
Share-based Compensation [Abstract] |
Schedule of Share-based Compensation, Activity [Table Text Block] | We granted stock-based compensation under the 2006 Stock Plan, the Mueller Water Products, Inc. 2006 Employee Stock Purchase Plan and the Phantom Plan during the nine months ended June 30, 2017 as follows.
|  | Number granted |  | Weighted average grant date fair value per instrument |  | Total grant date fair value (in millions)
Quarter ended December 31, 2016: |  |  |  |  |  |
Restricted stock units |  | 177,861 |  |  | $ | 13.26 |  |  | $ | 2.4 |
Employee stock purchase plan instruments |  | 39,231 |  |  | 2.34 |  |  | 0.1 |
Phantom Plan awards |  | 187,115 |  |  | 13.26 |  |  | 2.5 |
PRSUs: 2017 award |  | 59,285 |  |  | 13.26 |  |  | 0.8 |
2016 award |  | 73,826 |  |  | 13.26 |  |  | 1.0 |
2015 award |  | 68,556 |  |  | 13.26 |  |  | 0.9 |
Quarter ended March 31, 2017: |  |  |  |  |  |
Restricted stock units |  | 165,999 |  |  | 12.82 |  |  | 2.1 |
Employee stock purchase plan instruments |  | 38,267 |  |  | 2.44 |  |  | 0.1 |
Phantom Plan awards |  | 12,145 |  |  | 12.66 |  |  | 0.2 |
PRSUs: 2017 award |  | 19,012 |  |  | 13.15 |  |  | 0.2 |
Quarter ended June 30, 2017: |  |  |  |  |  |
Employee stock purchase plan instruments |  | 36,195 |  |  | 2.70 |  |  | 0.1 |
|  |  |  |  |  | $ | 10.4 |

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- References No definition available. + Details
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