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Equity and Redeemable Non-controlling Interest (Tables)
 12 Months Ended
Dec. 31, 2022
Equity [Abstract]  
Schedule of Stock Repurchased and Retired Share repurchases under our authorization were as follows:
 Repurchases Occurring in 2022Cumulative Repurchases as of December 31, 2022
 SharesAverage PriceSharesAverage Price
Share repurchase authorization2,428,850 $276.42 6,904,781 $173.59 
The following is a summary of our repurchases in the years ended December 31, 2022, 2021 and 2020:
Year Ended December 31,
202220212020
Shares repurchased pursuant to repurchase authorizations2,428,850 756,883 563,953 
Total purchase price ($ in millions)$671.4 $214.8 $46.1 
Average purchase price per share$276.42 $283.75 $81.71 
Shares repurchased in association with tax withholdings on the vesting of RSUs56,911 54,318 30,620 
Schedule of Dividends Declared
We declared and paid dividends on our common stock as follows:
Quarter declaredDividend amount per share
Total amount of dividends paid
($ in millions)
2020
First quarter$0.30 $7.0 
Second quarter0.30 6.8 
Third quarter0.31 7.1 
Fourth quarter0.31 8.2 
2021
First quarter$0.31 $8.2 
Second quarter0.35 9.3 
Third quarter0.35 10.6 
Fourth quarter0.35 10.6 
2022
First quarter$0.35 $10.3 
Second quarter0.42 11.9 
Third quarter0.42 11.6 
Fourth quarter0.42 11.4