Equity Equity

12 Months Ended

Sep. 30, 2016

Equity [Abstract]

Stockholders' Equity Note Disclosure

Preferred Shares

Mallinckrodt is authorized to issue 500,000,000 preferred shares, par value of $0.20 per share, none of which were issued or outstanding at September 30, 2016. Rights as to dividends, return of capital, redemption, conversion, voting and otherwise with respect to these shares may be determined by Mallinckrodt's Board of Directors on or before the time of issuance. In the event of the liquidation of the Company, the holders of any preferred shares then outstanding would, if issued on such terms that they carry a preferential distribution entitlement on liquidation, be entitled to payment to them of the amount for which the preferred shares were subscribed and any unpaid dividends prior to any payment to the ordinary shareholders.

Share Repurchases

On November 19, 2015, the Board of Directors authorized a $500.0 million share repurchase program (the “November 2015 Program”). The November 2015 Program commenced after the $300.0 million share repurchase program authorized by the Board of Directors on January 23, 2015 (the “January 2015 Program”) was completed in the first fiscal quarter of 2016. On March 16, 2016, the Board of Directors authorized an additional $350.0 million share repurchase program (the “March 2016 Program”) which will commence upon the completion of the November 2015 Program. These programs have no time limit or expiration date, and the Company currently expects to fully utilize each program.

	March 2016 Repurchase Program			November 2015 Repurchase Program			January 2015 Repurchase Program
	Number of Shares	Amount		Number of Shares	Amount		Number of Shares	Amount
Authorized repurchase amount		$	350.0		$	500.0		$	300.0
Repurchases:
Fiscal 2015	—	—		—	—		823,592	75.0
Fiscal 2016	—	—		6,510,824	425.6		3,199,279	225.0
Remaining amount available		$	350.0		$	74.4		$	—

The Company also repurchases shares from certain employees in order to satisfy employee tax withholding requirements in connection with the vesting of restricted shares. In addition, the Company repurchases shares to settle certain option exercises. The Company spent $2.3 million and $17.2 million to acquire shares in connection with equity-based awards in fiscal 2016 and 2015, respectively.