Shareholders' Equity

12 Months Ended

Dec. 31, 2019

Stockholders' Equity Note [Abstract]

Stockholders' Equity

SHAREHOLDERS’ EQUITY

Repurchases of common stock under the equity repurchase program initially authorized in 2010 by the Board of Directors of the Corporation totaled 18.6 million shares at an average price paid of $73.60 in 2019, 14.8 million shares at an average price paid of $89.21 per share in 2018 and 7.3 million shares at an average price paid of $72.44 per share in 2017. There is no expiration date for the Corporation's equity repurchase program. During the year ended December 31, 2019, the Corporation repurchased $1.4 billion under the equity repurchase program.

At December 31, 2019, the Corporation had no outstanding warrants as all remaining warrants to purchase common stock expired in 2018. Approximately 585,000 and 1.8 million shares of common stock were issued upon exercise of warrants in 2018 and 2017, respectively.

At December 31, 2019, the Corporation had 3.8 million shares of common stock reserved for stock option exercises and restricted stock unit vesting and 458,000 shares of restricted stock outstanding to employees and directors under share-based compensation plans.