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Stockholders' Equity
9 Months Ended
Sep. 30, 2020
Equity [Abstract]  
Stockholders' Equity Stockholders’ EquityDuring the nine months ended September 30, 2020, we acquired approximately 9 million common shares at a cost of $85 million, which were held as treasury stock. Including these repurchases, the total remaining share repurchase authorization was $1.3 billion at September 30, 2020. Purchases under the program are made at our discretion and may be in either open market transactions, including block purchases, or in privately negotiated transactions using cash on hand, cash generated from operations or proceeds from potential asset sales. This program may be changed based upon our financial condition or changes in market conditions and is subject to termination prior to completion.