14. Shareholders' Equity

At June 30, 2018 and 2017, authorized capital shares consisted of the following: 750 million Class A common shares, without par value; 5 million Class B common shares, without par value; and 500 thousand non-voting preferred shares, without par value. The Class A common shares and Class B common shares are collectively referred to below as “common shares”. Holders of common shares are entitled to share equally in any dividends declared by the Board of Directors and to participate equally in all distributions of assets upon liquidation. Generally, the holders of Class A common shares are entitled to one vote per share, and the holders of Class B common shares are entitled to one-fifth of one vote per share on proposals presented to shareholders for vote. Under certain circumstances, the holders of Class B common shares are entitled to vote as a separate class. Only Class A common shares were outstanding at June 30, 2018 and 2017.

We repurchased $1.8 billion of our common shares, in the aggregate, through share repurchase programs during fiscal 2018, 2017 and 2016, as described below. We funded the repurchases with available cash and short term borrowings. The common shares repurchased are held in treasury to be used for general corporate purposes.

During fiscal 2018, we repurchased 8.4 million common shares having an aggregate cost of $550 million. The average price paid per common share was $65.30. These repurchases include $300 million purchased under an accelerated share repurchase ("ASR") program, which began on February 14, 2018 and was completed on March 21, 2018. We repurchased 4.3 million shares under the ASR at an average price paid per share of $69.26.

During fiscal 2017, we repurchased 8.1 million common shares having an aggregate cost of $600 million. The average price paid per common share was $74.08.

During fiscal 2016, we repurchased 8.2 million common shares having an aggregate cost of $651 million. The average price paid per common share was $78.98.

During fiscal 2017, we retired 37 million common shares in treasury. The retirement of these shares had no impact on total shareholders' equity; however, it did impact certain individual components of shareholders' equity as follows: $2.5 billion decrease in common shares in treasury, $302 million decrease in common shares, and $2.2 billion decrease in retained earnings.

Accumulated Other Comprehensive Income/(Loss)

The following table summarizes the changes in the balance of accumulated other comprehensive income/(loss) by component and in total:



(in millions)	Foreign Currency Translation Adjustments and other			Unrealized Gain/(Loss) on Derivatives, net of tax			Accumulated Other Comprehensive Income/(Loss)
Balance at June 30, 2016	$	(123	)	$	7		$	(116	)
Other comprehensive income/(loss), net before reclassifications	(25		)	19			(6		)
Amounts reclassified to earnings	—			(3		)	(3		)
Total other comprehensive loss attributable to Cardinal Health, Inc., net of tax of $9 million	(25		)	16			(9		)
Balance at June 30, 2017	(148		)	23			(125		)
Other comprehensive income/(loss), before reclassifications	58			—			58
Amounts reclassified to earnings	(23		)	(2		)	(25		)
Total comprehensive income/(loss) attributable to Cardinal Health, Inc., net of tax of $1 million	35			(2		)	33
Balance at June 30, 2018	$	(113	)	$	21		$	(92	)

Activity related to realized and unrealized gains and losses on available-for-sale securities, as described in Note 6, was immaterial during fiscal 2018 and 2017.