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Common Stock | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Common Stock | Common Stock During the first six months of 2018, the Company repurchased approximately 6.1 million shares of its common stock for consideration of $500 million. In November 2016, the Board of Directors of the Company authorized the Company to repurchase up to $2.5 billion in shares of the Company's common stock, which superseded any prior authorizations. As of June 30, 2018, the Company remained authorized to repurchase up to approximately $1 billion in shares of its common stock. There is no time limit on the authorization. During the first six months of 2017, the Company repurchased approximately 5.4 million shares of its common stock for consideration of $400 million. The Company issued approximately 2.5 million and 3.7 million shares related to stock compensation and employee stock purchase plans during the first six months of 2018 and 2017, respectively.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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