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Common Stock	12 Months Ended
Common Stock	Dec. 31, 2019
Equity [Abstract]
Common Stock	Common Stock During 2019, the Company repurchased 4.8 million shares of its common stock for total consideration of $485 million. In November 2019, the Board of Directors of the Company authorized the Company to repurchase up to $2.5 billion of the Company's common stock, which superseded any prior authorizations. The Company remains authorized to purchase additional shares of its common stock up to a value of approximately $2.4 billion. There is no time limit on the authorization. During 2018, the Company purchased 8.2 million shares of its common stock for total consideration of $675 million. The Company issued approximately 4.6 million and 3.3 million shares related to stock compensation and employee stock purchase plans during the years ended December 31, 2019 and 2018, respectively.