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Stock Repurchases
3 Months Ended
Mar. 31, 2021
Equity [Abstract]  
Schedule of Stock Repurchases
The following table summarizes our stock repurchases for the three and nine months ended September 30, 2021 and 2020:
(Dollars in millions)For the Three Months Ended September 30,
20212020
Number of Shares RepurchasedCostNumber of Shares RepurchasedCost
Open Market (1)1,286,246 $704.1 — $— 
(Dollars in millions)For the Nine Months Ended September 30,
 20212020
Stock RepurchasesNumber of Shares RepurchasedCostNumber of Shares RepurchasedCost
Open Market (1)2,270,751 $1,091.2 710,157 $300.6 
Other (2)7,066 2.7 15,063 6.5 
Total2,277,817 $1,093.9 725,220 $307.1 

(1)     Represents repurchases under authorizations by the board of directors for the repurchase of shares by us from time to time in the open market through privately negotiated transactions, through block trades, pursuant to trading plans adopted in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934 or otherwise. On September 28, 2021, the board of directors authorized the repurchase of up to two million shares of our common stock in addition to the board’s prior authorizations. As of September 30, 2021, we had authorization to repurchase 2,231,859 shares of our common stock.
(2)     Represents shares of common stock released to us by team members as payment of tax withholdings upon the vesting of restricted stock and restricted stock units and the conversion of restricted stock units to common stock.