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EARNINGS PER SHARE CALCULATIONS.
 12 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
EARNINGS PER SHARE CALCULATIONS EARNINGS PER SHARE CALCULATIONS.
The following table presents the reconciliation of net income attributable to T. Rowe Price Group to net income allocated to our common stockholders and the weighted-average shares that are used in calculating the basic and diluted earnings per share on our common stock. Weighted-average common shares outstanding assuming dilution reflect the potential dilution, determined using the treasury stock method, that could occur if outstanding stock options were exercised and non-participating stock awards vested.
(in millions)202020192018
Net income attributable to T. Rowe Price Group$2,372.7 $2,131.3 $1,837.5 
Less: net income allocated to outstanding restricted stock and stock unit holders65.3 55.3 43.6 
Net income allocated to common stockholders$2,307.4 $2,076.0 $1,793.9 
Weighted-average common shares
Outstanding228.8 235.4 242.2 
Outstanding assuming dilution231.2 238.6 246.9 

For the past three years, no stock options have been excluded from the calculation of diluted earnings per common share as none of the options' inclusion would be anti-dilutive.