The number of shares issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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EQUITY - Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions				6 Months Ended
	Oct. 02, 2017	Sep. 28, 2017	Aug. 17, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax withholding obligations incurred on behalf of employees				$ 0.2	$ 2.6
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued upon vesting (in shares)				27,747
Underwritten Public Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares sold in offering (in shares)	18,400,000	16,000,000
Proceeds from offering	$ 370.9
Share price (in dollars per share)	$ 21	$ 21
Over-Allotment Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares sold in offering (in shares)	2,400,000
Care Capital Properties
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in merger (in shares)			94,000,000