Stock-Based Compensation (Tables)
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12 Months Ended |
Dec. 31, 2018 |
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
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Allocation of Share-based Compensation Costs by Plan |
The following table summarizes our stock-based compensation expense recorded within selling, general and administrative expenses for the years ended December 31: | | | | | | | | | | | | | ($ in millions) | 2018 | | 2017 | | 2016 | Stock option and appreciation rights | $ | 8.6 |
| | $ | 7.8 |
| | $ | 8.6 |
| Performance share units, stock-settled | 2.5 |
| | 4.1 |
| | 6.7 |
| Performance share units, cash-settled | — |
| | 0.1 |
| | 0.1 |
| Performance share units, dividend equivalents | 0.1 |
| | 0.1 |
| | 0.2 |
| Employee stock purchase plan | 0.9 |
| | 0.8 |
| | 0.7 |
| Deferred compensation plans | 3.0 |
| | 3.2 |
| | 3.2 |
| Total stock-based compensation expense | $ | 15.1 |
| | $ | 16.1 |
| | $ | 19.5 |
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Schedule of Stock Options Activity |
The following table summarizes changes in outstanding options: | | | | | | | | | | (in millions, except per share data) | 2018 | | 2017 | | 2016 | Options outstanding, January 1 | 3.5 |
| | 4.5 |
| | 5.0 |
| Granted | 0.5 |
| | 0.5 |
| | 0.7 |
| Exercised | (1.0 | ) | | (1.5 | ) | | (1.1 | ) | Forfeited | — |
| | — |
| | (0.1 | ) | Options outstanding, December 31 | 3.0 |
| | 3.5 |
| | 4.5 |
| Options exercisable, December 31 | 1.7 |
| | 1.9 |
| | 2.7 |
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| | | | | | | | | | | | | Weighted Average Exercise Price | 2018 | | 2017 | | 2016 | Options outstanding, January 1 | $ | 48.76 |
| | $ | 38.11 |
| | $ | 31.77 |
| Granted | 90.36 |
| | 84.09 |
| | 61.98 |
| Exercised | 35.95 |
| | 26.15 |
| | 22.50 |
| Forfeited | 75.32 |
| | 60.92 |
| | 45.91 |
| Options outstanding, December 31 | $ | 58.93 |
| | $ | 48.76 |
| | $ | 38.11 |
| Options exercisable, December 31 | $ | 45.32 |
| | $ | 35.44 |
| | $ | 27.17 |
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Schedule of Stock Appreciation Rights Award Activity |
The following table summarizes changes in outstanding SARs: | | | | | | | | | | | 2018 | | 2017 | | 2016 | SARs outstanding, January 1 | 51,368 |
| | 116,087 |
| | 232,930 |
| Granted | 3,480 |
| | 2,792 |
| | 3,368 |
| Exercised | (14,629 | ) | | (67,511 | ) | | (114,976 | ) | Forfeited | (400 | ) | | — |
| | (5,235 | ) | SARs outstanding, December 31 | 39,819 |
| | 51,368 |
| | 116,087 |
| SARs exercisable, December 31 | 30,285 |
| | 39,769 |
| | 71,701 |
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| | | | | | | | | | | | | Weighted Average Exercise Price | 2018 | | 2017 | | 2016 | SARs outstanding, January 1 | $ | 38.55 |
| | $ | 31.13 |
| | $ | 27.79 |
| Granted | 89.64 |
| | 83.47 |
| | 68.40 |
| Exercised | 28.45 |
| | 27.65 |
| | 24.95 |
| Forfeited | 63.43 |
| | — |
| | 42.28 |
| SARs outstanding, December 31 | $ | 46.48 |
| | $ | 38.55 |
| | $ | 31.13 |
| SARs exercisable, December 31 | $ | 36.91 |
| | $ | 30.77 |
| | $ | 26.65 |
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Schedule of Nonvested Performance-based Share Activity |
The following table summarizes changes in our outstanding stock-settled PSU awards: | | | | | | | | | | | | | | 2018 | | 2017 | | 2016 | Non-vested stock-settled PSU awards, January 1 | 341,944 |
| | 378,062 |
| | 422,726 |
| Granted at target level | 102,307 |
| | 92,045 |
| | 115,035 |
| Adjustments above/(below) target | (2,284 | ) | | (11,369 | ) | | 19,339 |
| Vested and converted | (121,984 | ) | | (116,684 | ) | | (173,364 | ) | Forfeited | (23,946 | ) | | (110 | ) | | (5,674 | ) | Non-vested stock-settled PSU awards, December 31 | 296,037 |
| | 341,944 |
| | 378,062 |
| | | | | | | Weighted Average Grant Date Fair Value | 2018 | | 2017 | | 2016 | Non-vested stock-settled PSU awards, January 1 | $ | 64.38 |
| | $ | 54.47 |
| | $ | 45.60 |
| Granted at target level | 90.45 |
| | 84.01 |
| | 60.47 |
| Adjustments above/(below) target | 33.86 |
| | 42.85 |
| | 38.71 |
| Vested and converted | 93.00 |
| | 50.06 |
| | 59.64 |
| Forfeited | 68.65 |
| | 73.64 |
| | 49.86 |
| Non-vested stock-settled PSU awards, December 31 | $ | 76.84 |
| | $ | 64.38 |
| | $ | 54.47 |
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Schedule of Nonvested Performance-based Units Activity |
The following table summarizes changes in our outstanding cash-settled PSU awards: | | | | | | | | | | | 2018 | | 2017 | | 2016 | Non-vested cash-settled PSU awards, January 1 | 1,972 |
| | 2,451 |
| | 29,196 |
| Granted at target level | 560 |
| | 598 |
| | 419 |
| Adjustments above/(below) target | (30 | ) | | (107 | ) | | 2,858 |
| Vested and converted | (910 | ) | | (970 | ) | | (29,032 | ) | Forfeited | — |
| | — |
| | (990 | ) | Non-vested cash-settled PSU awards, December 31 | 1,592 |
| | 1,972 |
| | 2,451 |
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| | | | | | | | | | | | | Weighted Average Grant Date Fair Value | 2018 | | 2017 | | 2016 | Non-vested cash-settled PSU awards, January 1 | $ | 92.25 |
| | $ | 25.28 |
| | $ | 32.07 |
| Granted at target level | 89.64 |
| | 83.47 |
| | 59.64 |
| Adjustments above/(below) target | 41.53 |
| | 66.61 |
| | 30.80 |
| Vested and converted | 93.00 |
| | 86.93 |
| | 59.64 |
| Forfeited | — |
| | — |
| | 50.55 |
| Non-vested cash-settled PSU awards, December 31 | $ | 79.48 |
| | $ | 92.25 |
| | $ | 25.28 |
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