Consolidated Statements of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021
Cash Flows From Operating Activities
Net income (loss)		$ (229.0)	$ 2,270.1
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation		149.6	129.4
Amortization of intangible assets		20.1	28.5
Net amortization of fixed-income securities		29.2	62.1
Amortization of equity-based compensation		43.7	42.7
Net realized (gains) losses on securities		1,623.0	(1,047.1)
Net (gains) losses on disposition of property and equipment		2.0	0.5
Goodwill impairment	[1]	224.8	0.0
Changes in:
Premiums receivable		(1,162.3)	(1,183.5)
Reinsurance recoverables		19.3	(237.3)
Prepaid reinsurance premiums		(6.7)	(244.6)
Deferred acquisition costs		(142.8)	(123.4)
Income taxes		(377.2)	(81.0)
Unearned premiums		1,659.0	2,051.5
Loss and loss adjustment expense reserves		1,647.9	2,481.0
Accounts payable, accrued expenses, and other liabilities		436.5	717.8
Other, net		(45.2)	71.7
Net cash provided by operating activities		3,891.9	4,938.4
Purchases:
Fixed maturities		(14,332.3)	(18,364.5)
Equity securities		(91.1)	(416.1)
Sales:
Fixed maturities		9,378.7	8,703.2
Equity securities		1,350.3	590.2
Maturities, paydowns, calls, and other:
Fixed maturities		2,409.1	3,898.2
Equity securities		39.3	67.1
Net (purchases) sales of short-term investments		(3,665.1)	3,587.0
Net unsettled security transactions		(143.4)	316.6
Acquisition of Protective Insurance Corporation, net of cash, cash equivalents, and restricted cash acquired		0.0	(313.2)
Purchases of property and equipment		(136.7)	(98.5)
Sales of property and equipment		11.6	11.5
Net cash used in investing activities		(5,179.6)	(2,018.5)
Cash Flows From Financing Activities
Dividends paid to common shareholders		(117.0)	(2,753.0)
Dividends paid to preferred shareholders		(13.4)	(13.4)
Acquisition of treasury shares for restricted stock tax liabilities		(29.5)	(30.4)
Acquisition of treasury shares acquired in open market		0.0	(65.0)
Net proceeds from debt issuances		1,486.0	0.0
Payment of acquired company debt		0.0	(20.0)
Net cash provided by (used in) financing activities		1,326.1	(2,881.8)
Increase in cash, cash equivalents, restricted cash, and restricted cash equivalents		38.4	38.1
Cash, cash equivalents, restricted cash, and restricted cash equivalents – January 1		202.1	76.5
Cash, cash equivalents, restricted cash, and restricted cash equivalents – June 30		$ 240.5	$ 114.6

[1] See Note 12 – Goodwill and Intangible Assets for further discussion.