13. Shareholders' Equity

At June 30, 2017 and 2016, 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, 2017 and 2016.

We repurchased $2.3 billion of our common shares, in the aggregate, through share repurchase programs during fiscal 2017, 2016 and 2015, as described below. We funded the repurchases with available cash. The common shares repurchased are held in treasury to be used for general corporate purposes.

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 2015, we repurchased 13.1 million common shares having an aggregate cost of $1.0 billion. The average price paid per common share was $79.02.

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, 2015	$	(41	)	$	18		$	(23	)
Other comprehensive income/(loss), net before reclassifications	(82		)	(9		)	(91		)
Amounts reclassified to earnings	—			(2		)	(2		)
Total other comprehensive loss, net of tax of $6 million	(82		)	(11		)	(93		)
Balance at June 30, 2016	(123		)	7			(116		)
Other comprehensive income/(loss), before reclassifications	(25		)	19			(6		)
Amounts reclassified to earnings	—			(3		)	(3		)
Total comprehensive net loss of tax of $9 million attributable to Cardinal Health, Inc.	(25		)	16			(9		)
Balance at June 30, 2017	$	(148	)	$	23		$	(125	)

Activity related to realized and unrealized gains and losses on available-for-sale securities, as described in Note 5, was immaterial during fiscal 2017 and 2016.