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Segment and Related Information (Tables)

12 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

Schedule of Segment Performance Based on Income (Loss) before Interest Income and Other Income and Expense

The Company evaluates segment performance based on income (loss) before interest income and other income and expense.

		Diagnostics				Other				Total
Year ended June 30, 2017:
Revenues		$	722.1			$	49.3			$	771.4
Depreciation and amortization			42.8				5.5				48.3
Segment operating income (loss)			130.9				(81.5	)			49.4
Year ended June 30, 2016:
Revenues		$	705.7			$	48.1			$	753.8
Depreciation and amortization			21.5				5.2				26.7
Segment operating income (loss)			239.3				(72.5	)			166.8
Year ended June 30, 2015:
Revenues		$	695.5			$	27.6			$	723.1
Depreciation and amortization			20.5				4.5				25.0
Segment operating income (loss)			217.1				(82.9	)			134.2

		Years Ended June 30,
		2017				2016				2015
Total operating income for reportable segments		$	49.4			$	166.8			$	134.2
Unallocated amounts:
Interest income			1.2				0.9				0.4
Interest Expense			(6.0	)			(0.3	)			(0.2	)
Change in the fair value of contingent consideration			0.8				—				—
Other			(2.5	)			1.5				0.5
Income from operations before income taxes			42.9				168.9				134.9
Income tax provision			21.3				43.6				54.7
Net income			21.6				125.3				80.2
Net loss attributable to non-controlling interest			(0.2	)			—				—
Net income attributable to Myriad Genetics, Inc. stockholders		$	21.8			$	125.3			$	80.2

Schedule Of Comparison of Balance Sheet Assets by Operating Segment

The following table sets forth a comparison of balance sheet assets by operating segment:

		June 30,
		2017				2016
Net equipment, leasehold improvements and property:
Diagnostics			20.2				26.3
Other			30.9				32.0
Total		$	51.1			$	58.3
Total Assets:
Diagnostics			900.9				512.4
Other			124.3				129.2
Total		$	1,025.2			$	641.6

Summary of Assets by Geographical Region

The following table reconciles assets by geographical region:

		June 30,
		2017				2016
Net equipment, leasehold improvements and property:
United States			27.6				33.6
Rest of world			23.5				24.7
Total		$	51.1			$	58.3
Total Assets:
United States			912.8				532.6
Rest of world			112.4				109.0
Total		$	1,025.2			$	641.6

Reconciliation of Assets by Operating Segment and Geographic Region to Total Assets

The following table reconciles assets by operating segment and geographic region to total assets:

		June 30,
		2017				2016
Total assets by segment and geographical region		$	1,025.2			$	641.6
Cash, cash equivalents, and marketable investment    securities (1)			199.2				238.9
Total		$	1,224.4			$	880.5

(1) The Company manages cash, cash equivalents, and marketable investment securities at the consolidated level for all segments

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Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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