CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Cash flow from (used in) operating activities:
Net income	$ 99.2	$ 198.7
Adjustments to reconcile Net income to cash flow from (used in) operating activities:
Intangible amortization and impairments	83.3	7.3
Depreciation and other amortization	2.8	3.0
Deferred income tax expense	7.9	23.5
Equity method income (net)	(75.3)	(117.5)
Distributions received from equity method investments	204.7	211.5
Share-based compensation and Affiliate equity compensation expense	23.7	38.8
Net realized and unrealized gains on investment securities	(1.4)	(9.1)
Other non-cash items	(0.7)	(3.3)
Changes in assets and liabilities:
Purchases of securities by consolidated Affiliate sponsored investment products	(24.0)	(12.7)
Sales of securities by consolidated Affiliate sponsored investment products	20.1	21.5
Increase in receivables	(161.1)	(159.5)
Decrease (increase) in other assets	(3.1)	6.1
Increase in payables, accrued liabilities, and other liabilities	32.8	0.9
Cash flow from operating activities	208.9	209.2
Cash flow from (used in) investing activities:
Investments in Affiliates, net of cash acquired	(49.5)	0.0
Purchase of fixed assets	(1.6)	(1.0)
Purchase of investment securities	(8.2)	(359.1)
Maturities and sales of investment securities	23.7	434.6
Cash flow from (used in) investing activities	(35.6)	74.5
Cash flow from (used in) financing activities:
Borrowings of junior subordinated notes	0.0	450.0
Repayments of senior bank debt and senior notes	0.0	(450.0)
Repurchases of common stock, net	(176.2)	(152.5)
Dividends paid on common stock	(0.3)	(0.3)
Distributions to non-controlling interests	(87.0)	(81.8)
Affiliate equity purchases, net	(28.3)	(33.0)
Redemptions of consolidated Affiliate sponsored investment products, net	(3.7)	(8.6)
Other financing items	(21.4)	(26.1)
Cash flow used in financing activities	(316.9)	(302.3)
Effect of foreign currency exchange rate changes on cash and cash equivalents	4.1	(1.6)
Net decrease in cash and cash equivalents	(139.5)	(20.2)
Cash and cash equivalents at beginning of period	950.0	813.6
Effect of consolidation of Affiliate sponsored investment products	6.0	0.0
Cash and cash equivalents at end of period	$ 816.5	$ 793.4

Amortization and Impairments of Intangible Assets

No definition available.

Name:	amg_AmortizationandImpairmentsofIntangibleAssets
Namespace Prefix:	amg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate expense charged against earnings to allocate the cost of tangible assets to periods in which the assets are used and held and to allocate the cost of issuing debt to periods in which the debt is outstanding. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

+ References

No definition available.