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EARNINGS PER SHARE CALCULATIONS. (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Earnings per share reconciliation

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)	2015				2016				2017
Net income attributable to T. Rowe Price Group	$	1,223.0			$	1,215.0			$	1,497.8
Less: net income allocated to outstanding restricted stock and stock unit holders	16.1				25.5				33.9
Net income allocated to common stockholders	$	1,206.9			$	1,189.5			$	1,463.9
Weighted-average common shares
Outstanding	254.6				245.5				241.2
Outstanding assuming dilution	260.9				250.3				245.1

Anti-dilutive securities

The following table shows the weighted-average outstanding stock options that are excluded from the calculation of diluted earnings per common share as the inclusion of such shares would be anti-dilutive.

(in millions)	2015			2016			2017
Weighted-average outstanding stock options excluded	6.4			9.9			5.0

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- References

No definition available.

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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