UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income	$ 166.6	$ 554.0
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization of property and equipment	46.1	41.9
Stock-based compensation expense	58.3	43.5
Net (gains) losses recognized on investments	167.3	(82.0)
Net investments in T. Rowe Price investment products used to economically hedge supplemental savings plan liability	(8.9)	(18.2)
Net change in securities held by consolidated T. Rowe Price investment products	234.6	(184.2)
Other changes in assets and liabilities	123.7	223.7
Net cash provided by operating activities	787.7	578.7
Cash flows from investing activities
Purchases of T. Rowe Price investment products	(225.1)	(15.6)
Dispositions of T. Rowe Price investment products	299.1	33.5
Net cash of T. Rowe Price investment products on deconsolidation	(0.8)	(3.4)
Additions to property and equipment	(46.0)	(47.7)
Other investing activity	0.4	(0.6)
Net cash provided by (used in) investing activities	27.6	(33.8)
Cash flows from financing activities
Repurchases of common stock	(891.3)	(231.0)
Common share issuances under stock-based compensation plans	38.1	43.6
Dividends paid to common stockholders of T. Rowe Price Group	(215.2)	(184.6)
Net subscriptions received from redeemable non-controlling interest holders	76.1	66.0
Net cash used in financing activities	(992.3)	(306.0)
Effect of exchange rate changes on cash and cash equivalents of consolidated T. Rowe Price investment products	(1.2)	(0.7)
Net change in cash and cash equivalents during period	(178.2)	238.2
Cash and cash equivalents at beginning of period	1,858.3	1,495.3
Cash and cash equivalents at ending of period	$ 1,680.1	$ 1,733.5