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Supplemental Cash Flow Information
 9 Months Ended
Sep. 30, 2024
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information SUPPLEMENTAL CASH FLOW INFORMATION
Cash and cash equivalents include bank demand deposits and daily overnight reverse repurchase commitments of funds held in bank demand deposit accounts by certain subsidiaries. The amount of overnight reverse repurchase commitments, which are not considered part of the investment portfolio, held by these subsidiaries at September 30, 2024 and 2023, and December 31, 2023, were $89.4 million, $79.7 million, and $68.2 million, respectively. Restricted cash and restricted cash equivalents include collateral held against unpaid deductibles and cash that is restricted to pay flood claims under the National Flood Insurance Program’s “Write Your Own” program, for which certain subsidiaries are participants.

Non-cash activity included the following in the respective periods:
Nine Months Ended September 30,
(millions)20242023
Common share dividends1
$58.6 $58.5 
Operating lease liabilities2
73.6 45.6 
1 Declared but unpaid. See Note 9 – Dividends for further discussion.
2 From obtaining right-of-use assets.
In the respective periods, we paid the following: 
 Nine Months Ended September 30,
(millions)20242023
Income taxes1
$1,985.3 $413.0 
Interest225.9 213.5 
Operating lease liabilities63.4 57.2 
1 The increase in income taxes paid was primarily driven by higher profitability during the first nine months of 2024, compared to the same period in the prior year.