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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of stock-based compensation expense | A summary of the Company’s stock-based compensation expense is presented below:
(in millions) | Three Months Ended June 30, |  | Six Months Ended June 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
PRSU (benefit) expense | $ | (0.9 | ) |  | $ | 1.2 |  |  | $ | 0.2 |  |  | $ | 2.0 |
Option expense | 1.7 |  |  | 2.1 |  |  | 3.4 |  |  | 4.2 |
RSU/DSU expense | 0.5 |  |  | 1.4 |  |  | 1.8 |  |  | 2.0 |
Total stock based compensation expense | $ | 1.3 |  |  | $ | 4.7 |  |  | $ | 5.4 |  |  | $ | 8.2 |
Summary of PRSU activity and related information | A summary of the Company’s PRSU activity and related information for the six months ended June 30, 2014 is presented below:
(shares in millions) |  |  |  |  |
| Number of Shares |  | Weighted- Average Grant Date Fair Value |  | Aggregate Intrinsic Value
Awards outstanding at December 31, 2013 | 0.3 |  |  | $ | 39.04 |  |  |
Granted | 0.3 |  |  | 51.86 |  |  |
Vested | 0.0 |  |  | 37.05 |  |  |
Forfeited | (0.3 | ) |  | 39.56 |  |  |
Awards outstanding at June 30, 2014 | 0.3 |  |  | $ | 51.86 |  |  | $ | 16.7 |
Schedule of stock option activity | A summary of the Company’s stock option activity and related information for the six months ended June 30, 2014 is presented below:
(shares in millions) |  |  |  |  |  |  |
| Number of Shares |  | Weighted- Average Grant Date Fair Value |  | Weighted- Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value
Options outstanding December 31, 2013 | 2.8 |  |  | $ | 21.73 |  |  |  |  |
Granted | 0.2 |  |  | 51.91 |  |  |  |  |
Forfeited | 0.0 |  |  | 50.55 |  |  |  |  |
Exercised | (0.1 | ) |  | 19.56 |  |  |  |  |
Options outstanding at June 30, 2014 | 2.9 |  |  | $ | 24.11 |  |  | 5.63 |  |  | $ | 91.9 |
Options exercisable at June 30, 2014 | 2.3 |  |  | $ | 19.17 |  |  | 4.87 |  |  | $ | 94.7 |
Schedule of restricted stock units and deferred stock units | A summary of the Company’s RSU and DSU activity and related information for the six months ended June 30, 2014 is presented below:
(shares in millions) |  |  |  |  |
| Number of Shares |  | Weighted- Average Grant Date Fair Value |  | Aggregate Intrinsic Value
Awards outstanding at December 31, 2013 | 0.2 |  |  | $ | 47.00 |  |  |
Granted | 0.0 |  |  | 52.87 |  |  |
Vested | (0.1 | ) |  | 44.00 |  |  |
Forfeited | 0.0 |  |  | 46.62 |  |  |
Awards outstanding at June 30, 2014 | 0.1 |  |  | $ | 49.41 |  |  | $ | 5.0 |
Schedule of Unrecognized Compensation Expense | A summary of total unrecognized stock-based compensation expense based on current performance estimates related to the PRSUs, options, RSUs and DSUs granted during the six months ended June 30, 2014 is presented below:
($ in millions) |  |  |
| June 30, 2014 |  | Weighted Average Remaining Vesting Period (Years)
Unrecognized PRSU expense | $ | 12.3 |  |  | 2.02 |
Unrecognized stock option expense | 4.1 |  |  | 2.57 |
Unrecognized RSU/DSU expense | 0.7 |  |  | 0.83 |
Total unrecognized stock-based compensation expense | $ | 17.1 |  |  | 2.11 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the total compensation cost related to nonvested awards not yet recognized and the weighted-average period over which it is expected to be recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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