Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income	$ 627.7	$ 76.0
Less: Income from discontinued operations, net of tax	(75.3)	(50.0)
Adjustments to reconcile net income to net cash flows from operating activities from continuing operations:
Income from discontinued operations, excluding consolidated Funds	(509.2)	0.0
Loss on sale of subsidiary	1.3
Changes in operating assets and liabilities (excluding discontinued operations):
Net cash flows from operating activities of continuing operations	47.0	71.4
Net cash flows from operating activities of discontinued operations	(1.6)	(9.4)
Total net cash flows from operating activities	45.4	62.0
Cash flows from investing activities:
Net cash flows from investing activities of continuing operations	712.2	12.3
Net cash flows from investing activities of discontinued operations	11.7	(3.2)
Total net cash flows from investing activities	723.9	9.1
Cash flows from financing activities:
Net cash flows from financing activities of continuing operations	50.5	(67.8)
Net cash flows from financing activities of discontinued operations	(28.4)	1.0
Total net cash flows from financing activities	22.1	(66.8)
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	0.0
Net increase in cash and cash equivalents	791.4	4.3
Cash and cash equivalents at beginning of period (including restricted cash)	372.9	82.1
Cash and cash equivalents at beginning of period classified within assets held for sale	31.2	38.9
Cash and cash equivalents at end of period	1,195.5	125.3
Less: cash and cash equivalents at end of period classified within assets held for sale	(18.5)	(27.2)
Cash and cash equivalents at end of period from continuing operations (including restricted cash)	1,177.0	98.1
Supplemental disclosure of cash flow information:
Interest paid (excluding consolidated Funds)	9.8	13.3
Income taxes paid	31.9	2.4
Supplemental disclosure of non-cash investing and financing transactions:
Payable for securities purchased by a consolidated Fund	0.0
Consolidated Entity Excluding Consolidated Funds
Adjustments to reconcile net income to net cash flows from operating activities from continuing operations:
Impairment of goodwill	0.0	16.4
Amortization of acquired intangibles	0.0	0.3
Income from discontinued operations, excluding consolidated Funds	(509.2)	0.0
Loss on sale of subsidiary	1.3	0.0
Depreciation and other amortization	11.3	9.9
Amortization of debt-related costs	2.2	2.1
Amortization and revaluation of non-cash compensation awards	13.3	(15.6)
Net earnings from Affiliate accounted for using the equity method	(2.4)	(1.2)
Distributions received from equity method Affiliate	2.9	1.5
Distributions from discontinued operations	46.4	37.3
Deferred income taxes	(4.1)	24.3
(Gains) losses on other investments	(2.8)	13.5
Changes in operating assets and liabilities (excluding discontinued operations):
(Increase) decrease in investment advisory fees receivable	(31.8)	23.5
(Increase) decrease in other receivables, prepayments, deposits and other assets	9.7	(15.4)
Decrease in accrued incentive compensation, operating lease liabilities and other liabilities	(21.6)	(38.3)
Decrease in accounts payable, accrued expenses and accrued income taxes	(20.6)	(16.9)
Net cash flows from operating activities of continuing operations	47.0	71.9
Cash flows from investing activities:
Additions of fixed assets, excluding discontinued operations	(7.4)	(15.2)
Cash proceeds from sale of discontinued operations	713.7	0.0
Purchase of investment securities	(2.5)	(8.8)
Sale of investments	8.4	36.3
Cash flows from financing activities:
Proceeds from third party and non-recourse borrowings	132.0	80.0
Repayment of third party and non-recourse borrowings	(78.1)	(103.3)
Payment for debt issuance costs	(0.4)	0.0
Payment to OM plc for co-investment redemptions	(1.3)	(0.3)
Dividends paid to stockholders	(1.1)	(6.3)
Dividends paid to related parties	(0.6)	(3.0)
Repurchases of common stock	0.0	(35.3)
Consolidated Funds
Cash flows from operating activities:
Less: Net (income) loss attributable to non-controlling interests in consolidated Funds from continuing operations	0.0	4.5
Adjustments to reconcile net income to net cash flows from operating activities from continuing operations:
(Gains) losses on other investments	0.0	7.5
Purchase of investments	0.0	(46.1)
Sale of investments	0.0	45.5
(Increase) decrease in receivables and other assets	0.0	(0.7)
Increase (decrease) in accounts payable and other liabilities	0.0	(2.2)
Changes in operating assets and liabilities (excluding discontinued operations):
Net cash flows from operating activities of continuing operations	0.0	(0.5)
Cash flows from financing activities:
Redeemable non-controlling interest capital raised	0.0	1.2
Redeemable non-controlling interest capital redeemed	$ 0.0	(0.8)
Supplemental disclosure of non-cash investing and financing transactions:
Payable for securities purchased by a consolidated Fund		$ 0.5