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Share-Based Compensation (Tables) | 12 Months Ended
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Jun. 30, 2015
Schedule of Fair Value of Stock Option Grant Weighted-Average Assumptions | The fair value of each option grant is estimated on the date of the grant using the Black-Scholes option-pricing model with the following weighted-average assumptions used for grants for the fiscal year ended June 30:
|  | 2015 |  |  | 2014 |  |  | 2013 |
Risk-free interest rate |  |  | 1.6 | % |  |  | 1.6 | % |  |  | 0.8 | %
Expected dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected lives (in years) |  |  | 4.1 - 4.7 |  |  |  | 4.1 - 4.7 |  |  |  | 4.2 - 4.7 |
Expected volatility |  |  | 40 | % |  |  | 40 | % |  |  | 44 | %
Schedule of Share-Based Compensation Arrangement by Share Based Payment Award Options Outstanding | A summary of option activity is as follows for the fiscal years ended June 30:
|  | 2015 |  |  | 2014 |  |  | 2013 |
|  | Number of shares |  |  | Weighted average exercise price |  |  | Number of shares |  |  | Weighted average exercise price |  |  | Number of shares |  |  | Weighted average exercise price |
Options outstanding at beginning of year |  |  | 14.2 |  |  | $ | 23.30 |  |  |  | 14.4 |  |  | $ | 21.75 |  |  |  | 15.2 |  |  | $ | 19.32 |
Options granted |  |  | — |  |  | $ | — |  |  |  | 3.3 |  |  | $ | 26.52 |  |  |  | 3.0 |  |  | $ | 27.09 |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercised |  |  | (1.2 | ) |  | $ | 20.17 |  |  |  | (3.1 | ) |  | $ | 19.44 |  |  |  | (3.5 | ) |  | $ | 15.65 |
Options canceled or expired |  |  | (0.5 | ) |  | $ | 25.98 |  |  |  | (0.4 | ) |  | $ | 24.30 |  |  |  | (0.3 | ) |  | $ | 22.26 |
Options outstanding at end of year |  |  | 12.5 |  |  | $ | 23.49 |  |  |  | 14.2 |  |  | $ | 23.30 |  |  |  | 14.4 |  |  | $ | 21.75 |
Options exercisable at end of year |  |  | 9.6 |  |  | $ | 22.80 |  |  |  | 7.1 |  |  | $ | 21.90 |  |  |  | 7.5 |  |  | $ | 20.51 |
Options vested and expected to vest |  |  | 12.5 |  |  | $ | 23.49 |  |  |  | 13.4 |  |  | $ | 23.12 |  |  |  | 13.5 |  |  | $ | 21.58 |
Weighted average fair value of options granted during the year |  |  |  |  |  | $ | — |  |  |  |  |  |  | $ | 10.04 |  |  |  |  |  |  | $ | 9.87 |
Schedule of Share-Based Compensation Arrangement by Share Based Payment Award Options Outstanding and Option Exercisable | The following table summarizes information about stock options outstanding at June 30, 2015:
Range of exercise prices |  | outstanding at June 30, 2015 |  |  | average remaining contractual life (years) |  |  | Weighted average exercise price |  |  | exercisable at June 30, 2015 |  |  | Weighted average exercise price |
$7.27 - 19.47 |  |  | 4.0 |  |  |  | 5.02 |  |  | $ | 17.49 |  |  |  | 3.6 |  |  | $ | 17.30 |
$20.01 - 26.49 |  |  | 4.9 |  |  |  | 5.52 |  |  | $ | 24.95 |  |  |  | 3.3 |  |  | $ | 24.29 |
$26.84 - 30.34 |  |  | 3.6 |  |  |  | 6.16 |  |  | $ | 28.12 |  |  |  | 2.7 |  |  | $ | 28.44 |
$30.53 - 37.73 |  |  | — |  |  |  | 6.17 |  |  | $ | 34.02 |  |  |  | — |  |  | $ | 32.74 |
|  |  | 12.5 |  |  |  | 5.54 |  |  | $ | 23.49 |  |  |  | 9.6 |  |  | $ | 22.80 |
Schedule of Share-Based Compensation Arrangement by Share Based Payment Award Restricted Stock Units Outstanding | A summary of RSU activity is as follows:
|  | 2015 |
|  | Number of shares |  |  | Weighted average grant date fair value |
RSUs outstanding at beginning of year |  |  | — |  |  | $ | — |
RSUs granted |  |  | 1.2 |  |  | $ | 37.66 |
Less: |  |  |  |  |  |  |  |
RSUs vested |  |  | 0.0 |  |  | $ | 34.22 |
RSUs canceled |  |  | 0.2 |  |  | $ | 38.12 |
RSUs outstanding at end of year |  |  | 1.0 |  |  | $ | 37.63 |
Schedule of Share-Based Compensation Recognized in Consolidated Statements of Operations | Share-based compensation expense recognized and included in the consolidated statements of operations for the fiscal years ended June 30, 2015, 2014 and 2013 was as follows:
|  | Years Ended June 30, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Cost of molecular diagnostic testing |  | $ | 0.9 |  |  | $ | 0.8 |  |  | $ | 1.0 |
Cost of pharmaceutical and clinical services |  |  | 0.5 |  |  |  | 0.3 |  |  |  | 0.2 |
Research and development expense |  |  | 4.3 |  |  |  | 5.4 |  |  |  | 3.3 |
Selling, general, and administrative expense |  |  | 40.0 |  |  |  | 27.5 |  |  |  | 22.1 |
Total share-based compensation expense |  | $ | 45.7 |  |  | $ | 34.0 |  |  | $ | 26.6 |
Schedule of Unrecognized Share-Based Compensation Cost | The Company has unrecognized share-based compensation cost related to share-based compensation granted under its current plans. The estimated unrecognized share-based compensation cost and related weighted average recognition period, aggregate intrinsic value of options outstanding, aggregate intrinsic value of options that are fully vested and aggregate intrinsic value of RSUs vested and expected to vest is as follows:
|  | As of June 30, 2015 |
Unrecognized share-based compensation cost |  | $ | 37.3 |
Aggregate intrinsic value of options outstanding |  | $ | 131.2 |
Aggregate intrinsic value of options fully vested |  | $ | 107.3 |
Aggregate intrinsic value of RSUs outstanding |  | $ | 34.3 |
Schedule of Intrinsic Value of Options Exercised | The total intrinsic value of options exercised during 2015, 2014 and 2013 was as follows:
|  | Years Ended June 30, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Total intrinsic value of options exercised |  | $ | 20.5 |  |  | $ | 49.4 |  |  | $ | 51.8 |
Schedule of Shares Purchased and Compensation Expenses | Shares purchased under and compensation expense associated with the 1995 and 2012 Plans for the years reported are as follows:
|  | Years Ended June 30, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Shares purchased under the plans |  |  | 0.2 |  |  |  | 0.2 |  |  |  | 0.1 |
Plan compensation expense |  | $ | 1.8 |  |  | $ | 1.3 |  |  | $ | 0.9 |
Employee Stock Purchase Plan |
Schedule of Fair Value of Stock Option Grant Weighted-Average Assumptions | The fair value of shares issued under the Plan that was in effect for each period reported was calculated using the Black-Scholes option-pricing model using the following weighted-average assumptions:
|  | 2015 |  |  | 2014 |  |  | 2013 |
Risk-free interest rate |  |  | 0.1 | % |  |  | 0.1 | % |  |  | 0.1 | %
Expected dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected lives (in years) |  |  | 0.5 |  |  |  | 0.5 |  |  |  | 0.5 |
Expected volatility |  |  | 33 | % |  |  | 56 | % |  |  | 37 | %

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