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Common Stock
3 Months Ended
Mar. 31, 2017
Equity [Abstract]  
Common Stock
Common Stock
During the first three months of 2017, the Company repurchased approximately 2.7 million shares of its common stock for consideration of $200 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of the Company authorized the Company to repurchase up to $2.5 billion in shares of the Company's common stock, which superseded any prior authorizations.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 March 31, 2017, the Company remained authorized to repurchase up to approximately $2.2 billion in shares of its common stock. There is no time limit on the authorization. During the first three months of 2016, the Company repurchased approximately 3.5 million shares of its common stock for consideration of $200 million.