EARNINGS PER SHARE CALCULATIONS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Net income attributable to T. Rowe Price Group	$ 2,087.1	$ 2,100.1	$ 1,788.7
Less: net income allocated to outstanding restricted stock and stock unit holders (basic)	50.6	55.8	44.4
Less: net income allocated to outstanding restricted stock and stock unit holders (diluted)	50.6	55.8	44.4
Net income allocated to common stockholders (basic)	2,036.5	2,044.3	1,744.3
Net income allocated to common stockholders (diluted)	$ 2,036.5	$ 2,044.3	$ 1,744.3
Weighted-average common shares
Outstanding (in shares)	220,000,000.0	222,800,000	224,100,000
Outstanding assuming dilution (in shares)	220,300,000	223,300,000	224,800,000
Stock options with anti-diluted impact (in shares)	0	0	0