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Stockholders' Equity - Summarizes the Company's Pre-tax Share-based Incentive Compensation Expense and Income Tax Benefit (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense | [1] | $ 62.9 | $ 61.2 | $ 54.1
Associated tax benefits recognized |  | 19.7 | 18.6 | 15.7
2016 Three-year PSU Awards [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense |  | 6.3 |  |
2016 President and CEO Inducement Award [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense |  | 0.5 |  |
2014 Special PSU Awards [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense | [2] | 8.8 | 15.7 | 11.8
2014 Three-year PSU Awards [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense |  | 4.9 | 7.0 | 6.8
2013 Three-year PSU Awards [member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense |  |  | 4.7 | 8.2
2012 Three-year PSU Awards [member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense |  |  |  | 1.8
2015 Three-year PSU Awards [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense |  | 3.5 | 4.7 |
2013 WVH Incentive Compensation [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense | [3] |  |  | 1.3
2012 President and COO Four-year Incentive Compensation [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense | [4] | 0.2 | 0.3 | 0.4
SLO Awards [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense |  | 2.5 | 3.7 | 4.6
Other long-term share-based incentive compensation programs [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Total share-based incentive compensation expense | [5] | $ 36.2 | $ 25.1 | $ 19.2
[1] | The amounts do not include the expense related to our U.S. profit sharing contributions made in the form of our common stock as these contributions are not considered share-based incentive compensation.
[2] | The amount does not include expense related to the 2014 Special PSU awards that will be settled in cash of $1.6 million in the year ended December 31, 2016.
[3] | On February 28, 2013, the Organization and Compensation Committee of our Board of Directors (“O&C Committee”) approved a change in the vesting policy regarding the existing 2011 Three-year PSU Awards, and the newly granted 2013 three-year PSU Awards, for William V. Hickey, our former Chairman and Chief Executive Officer. The approved change will result in the full vesting of the awards, rather than a pro-rata portion vesting as of the date of his retirement (May 16, 2013). Mr. Hickey’s awards will still be subject to the performance metrics stipulated in the plan documents, and will be paid-out in accordance with the original planned timing. As a result of these approved changes, the expense related to these awards was accelerated and recognized over the applicable service period up until the date of his retirement.
[4] | The amount includes only the two initial performance-based equity awards. See below for further detail.
[5] | The amount includes the expenses associated with the restricted stock awards consisting of restricted stock shares, restricted stock units and cash-settled restricted stock unit awards.

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