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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions | Total | Restricted shares | Restricted stock units | Common stock | Common stock Restricted shares | Common stock Restricted stock units | Additional capital in excess of par value | Additional capital in excess of par value Restricted shares | Additional capital in excess of par value Restricted stock units | Retained earnings | AOCI | [1]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2018 |  |  |  | 238,069,000 |  |  |  |  |  |  |
Balances at beginning of period at Dec. 31, 2018 | $ 6,124.3 |  |  | $ 47.6 |  |  | $ 654.6 |  |  | $ 5,464.1 | $ (42.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | 1,040.1 |  |  |  |  |  |  |  |  | 1,040.1 |
Other comprehensive income (loss), net of tax | 3.5 |  |  |  |  |  |  |  |  |  | 3.5
Dividends declared | (367.2) |  |  |  |  |  |  |  |  | (367.2) |
Common stock-based compensation plans activity |  |  |  |  |  |  |  |  |  |  |
Shares issued upon option exercises (in shares) |  |  |  | 1,495,000 |  |  |  |  |  |  |
Shares issued upon option exercises | 82.8 |  |  | $ 0.3 |  |  | 82.5 |  |  |  |
Restricted shares issued, net of shares withheld for taxes (in shares) |  |  |  |  | 7,000 | 33,000 |  |  |  |  |
Restricted shares issued, net of shares withheld for taxes |  | $ (0.1) | $ (1.4) |  |  |  |  | $ (0.1) | $ (1.4) |  |
Forfeiture of restricted awards (in shares) |  |  |  | (7,000) |  |  |  |  |  |  |
Stock-based compensation expense | 90.7 |  |  |  |  |  | 90.7 |  |  |  |
Restricted stock units issued as dividend equivalents |  |  |  |  |  |  | 0.1 |  |  | (0.1) |
Common shares repurchased (in shares) |  |  |  | (4,079,000) |  |  |  |  |  |  |
Common shares repurchased | (393.6) |  |  | $ (0.8) |  |  | (171.8) |  |  | (221.0) |
Ending balance (in shares) at Jun. 30, 2019 |  |  |  | 235,518,000 |  |  |  |  |  |  |
Balances at end of period at Jun. 30, 2019 | 6,579.1 |  |  | $ 47.1 |  |  | 654.6 |  |  | 5,915.9 | (38.5)
Beginning balances attributable to redeemable non-controlling interests at Dec. 31, 2018 | 740.3 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to redeemable non-controlling interests | 69.8 |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax, attributable to redeemable non-controlling interests | 0.3 |  |  |  |  |  |  |  |  |  |
Net subscriptions into consolidated T. Rowe Price investment products | 211.6 |  |  |  |  |  |  |  |  |  |
Net deconsolidations of T. Rowe Price investment products | (9.1) |  |  |  |  |  |  |  |  |  |
Ending balances attributable to redeemable non-controlling interests at Jun. 30, 2019 | 1,012.3 |  |  |  |  |  |  |  |  |  |
Beginning balance (in shares) at Mar. 31, 2019 |  |  |  | 236,432,000 |  |  |  |  |  |  |
Balances at beginning of period at Mar. 31, 2019 | 6,311.0 |  |  | $ 47.3 |  |  | 654.5 |  |  | 5,650.8 | (41.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | 527.5 |  |  |  |  |  |  |  |  | 527.5 |
Other comprehensive income (loss), net of tax | 3.1 |  |  |  |  |  |  |  |  |  | 3.1
Dividends declared | (183.4) |  |  |  |  |  |  |  |  | (183.4) |
Common stock-based compensation plans activity |  |  |  |  |  |  |  |  |  |  |
Shares issued upon option exercises (in shares) |  |  |  | 665,000 |  |  |  |  |  |  |
Shares issued upon option exercises | 37.8 |  |  | $ 0.1 |  |  | 37.7 |  |  |  |
Restricted shares issued, net of shares withheld for taxes (in shares) |  |  |  |  | 7,000 |  |  |  |  |  |
Restricted shares issued, net of shares withheld for taxes |  | (0.1) |  |  |  |  |  | $ (0.1) |  |  |
Net shares issued upon vesting of restricted stock units (in shares) |  |  |  |  |  | 19,000 |  |  |  |  |
Net shares issued upon vesting of restricted stock units |  |  | (0.2) |  |  |  |  |  | (0.2) |  |
Forfeiture of restricted awards (in shares) |  |  |  | (2,000) |  |  |  |  |  |  |
Stock-based compensation expense | 47.2 |  |  |  |  |  | 47.2 |  |  |  |
Restricted stock units issued as dividend equivalents |  |  |  |  |  |  | 0.1 |  |  | (0.1) |
Common shares repurchased (in shares) |  |  |  | (1,603,000) |  |  |  |  |  |  |
Common shares repurchased | (163.8) |  |  | $ (0.3) |  |  | (84.6) |  |  | (78.9) |
Ending balance (in shares) at Jun. 30, 2019 |  |  |  | 235,518,000 |  |  |  |  |  |  |
Balances at end of period at Jun. 30, 2019 | 6,579.1 |  |  | $ 47.1 |  |  | 654.6 |  |  | 5,915.9 | (38.5)
Beginning balances attributable to redeemable non-controlling interests at Mar. 31, 2019 | 886.7 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to redeemable non-controlling interests | 28.4 |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax, attributable to redeemable non-controlling interests | (1.0) |  |  |  |  |  |  |  |  |  |
Net subscriptions into consolidated T. Rowe Price investment products | 125.7 |  |  |  |  |  |  |  |  |  |
Net deconsolidations of T. Rowe Price investment products | (29.5) |  |  |  |  |  |  |  |  |  |
Ending balances attributable to redeemable non-controlling interests at Jun. 30, 2019 | 1,012.3 |  |  |  |  |  |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2019 |  |  |  | 235,214,000 |  |  |  |  |  |  |
Balances at beginning of period at Dec. 31, 2019 | 7,102.1 |  |  | $ 47.0 |  |  | 654.6 |  |  | 6,443.5 | (43.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | 946.1 |  |  |  |  |  |  |  |  | 946.1 |
Other comprehensive income (loss), net of tax | (9.2) |  |  |  |  |  |  |  |  |  | (9.2)
Dividends declared | $ (425.1) |  |  |  |  |  |  |  |  | (425.1) |
Common stock-based compensation plans activity |  |  |  |  |  |  |  |  |  |  |
Shares issued upon option exercises (in shares) | 1,944,942 |  |  | 1,364,000 |  |  |  |  |  |  |
Shares issued upon option exercises | $ 57.2 |  |  | $ 0.3 |  |  | 56.9 |  |  |  |
Restricted shares issued, net of shares withheld for taxes (in shares) |  |  |  |  | 8,000 | 43,000 |  |  |  |  |
Restricted shares issued, net of shares withheld for taxes |  | $ 0.0 | (3.3) |  |  |  |  |  | (3.3) |  |
Stock-based compensation expense | 111.6 |  |  |  |  |  | 111.6 |  |  |  |
Restricted stock units issued as dividend equivalents |  |  |  |  |  |  | 0.1 |  |  | (0.1) |
Common shares repurchased (in shares) |  |  |  | (9,639,000) |  |  |  |  |  |  |
Common shares repurchased | (1,028.7) |  |  | $ (1.9) |  |  | (165.3) |  |  | (861.5) |
Ending balance (in shares) at Jun. 30, 2020 |  |  |  | 226,990,000 |  |  |  |  |  |  |
Balances at end of period at Jun. 30, 2020 | 6,750.7 |  |  | $ 45.4 |  |  | 654.6 |  |  | 6,102.9 | (52.2)
Beginning balances attributable to redeemable non-controlling interests at Dec. 31, 2019 | 1,121.0 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to redeemable non-controlling interests | (51.0) |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax, attributable to redeemable non-controlling interests | 6.9 |  |  |  |  |  |  |  |  |  |
Net subscriptions into consolidated T. Rowe Price investment products | 89.9 |  |  |  |  |  |  |  |  |  |
Net deconsolidations of T. Rowe Price investment products | (62.9) |  |  |  |  |  |  |  |  |  |
Ending balances attributable to redeemable non-controlling interests at Jun. 30, 2020 | 1,090.1 |  |  |  |  |  |  |  |  |  |
Beginning balance (in shares) at Mar. 31, 2020 |  |  |  | 227,985,000 |  |  |  |  |  |  |
Balances at beginning of period at Mar. 31, 2020 | 6,434.0 |  |  | $ 45.6 |  |  | 654.6 |  |  | 5,782.9 | (49.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | 603.0 |  |  |  |  |  |  |  |  | 603.0 |
Other comprehensive income (loss), net of tax | (3.1) |  |  |  |  |  |  |  |  |  | (3.1)
Dividends declared | (210.3) |  |  |  |  |  |  |  |  | (210.3) |
Common stock-based compensation plans activity |  |  |  |  |  |  |  |  |  |  |
Shares issued upon option exercises (in shares) |  |  |  | 296,000 |  |  |  |  |  |  |
Shares issued upon option exercises | 15.9 |  |  | $ 0.1 |  |  | 15.8 |  |  |  |
Restricted shares issued, net of shares withheld for taxes (in shares) |  |  |  |  | 8,000 |  |  |  |  |  |
Net shares issued upon vesting of restricted stock units (in shares) |  |  |  |  |  | 6,000 |  |  |  |  |
Net shares issued upon vesting of restricted stock units |  |  | $ (0.3) |  |  |  |  |  | $ (0.3) |  |
Stock-based compensation expense | 53.3 |  |  |  |  |  | 53.3 |  |  |  |
Restricted stock units issued as dividend equivalents |  |  |  |  |  |  | 0.1 |  |  | (0.1) |
Common shares repurchased (in shares) |  |  |  | (1,305,000) |  |  |  |  |  |  |
Common shares repurchased | (141.8) |  |  | $ (0.3) |  |  | (68.9) |  |  | (72.6) |
Ending balance (in shares) at Jun. 30, 2020 |  |  |  | 226,990,000 |  |  |  |  |  |  |
Balances at end of period at Jun. 30, 2020 | 6,750.7 |  |  | $ 45.4 |  |  | $ 654.6 |  |  | $ 6,102.9 | $ (52.2)
Beginning balances attributable to redeemable non-controlling interests at Mar. 31, 2020 | 971.0 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to redeemable non-controlling interests | 125.5 |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax, attributable to redeemable non-controlling interests | (10.3) |  |  |  |  |  |  |  |  |  |
Net subscriptions into consolidated T. Rowe Price investment products | 26.1 |  |  |  |  |  |  |  |  |  |
Net deconsolidations of T. Rowe Price investment products | (42.8) |  |  |  |  |  |  |  |  |  |
Ending balances attributable to redeemable non-controlling interests at Jun. 30, 2020 | $ 1,090.1 |  |  |  |  |  |  |  |  |  |
[1] | Accumulated other comprehensive income.

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