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Consolidated Statements Of Cash Flows $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($)
Cash Flows from Operating Activities |  |  |
Net Income | $ 883.2 | $ 1,738.4 | $ 1,661.4
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Stock-based compensation |  | 42.1 | 39.7
Amortization of purchased intangibles | 55.5 | 110.7 | 113.8
Depreciation and amortization | 28.7 | 58.8 | 64.2
Net realized and unrealized (gains) losses on investments |  | (11.7) | (73.7)
Deferred income taxes |  | (14.5) | (17.2)
Change in: |  |  |
Accounts receivable |  | (65.5) | (115.7)
Other current assets |  | 640.1 | (14.6)
Other assets |  | 19.3 | 50.8
Accounts payable |  | 9.3 | (70.4)
Income taxes payable |  | (106.2) | (50.0)
Other current liabilities |  | (718.4) | (22.7)
Other liabilities |  | (15.2) | (18.4)
Other |  | (17.6) | 5.6
Net Cash Provided by (Used in) Operating Activities |  | 1,669.6 | 1,552.8
Cash Flows from Investing Activities |  |  |
Proceeds from maturities of available-for-sale marketable securities |  | 3.3 | 3.6
Proceeds from sales of investments |  | 13.5 | 97.9
Purchases of available-for-sale marketable securities |  | (3.0) | (2.6)
Purchases of property, net |  | (38.0) | (35.7)
Investments in privately-held equity investments |  | (3.6) | (2.4)
Net Cash (Used in) Provided by Investing Activities |  | (27.8) | 60.8
Cash Flows from Financing Activities |  |  |
Repayment of debt, including call premium |  | 0.0 | (16.4)
Cash dividends |  | (2,746.9) | (2,435.4)
Change in performance bond and guaranty fund contributions |  | (4,522.5) | (22,007.7)
Employee taxes paid on restricted stock vesting |  | (12.4) | (1.1)
Other |  | (4.6) | (0.4)
Net Cash Used in Financing Activities |  | (7,286.4) | (24,461.0)
Net change in cash, cash equivalents and restricted cash |  | (5,644.6) | (22,847.4)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, beginning balance |  | 93,109.7 | 137,974.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, ending balance | 87,465.1 | 87,465.1 | 115,126.9
Cash and cash equivalents | 1,789.9 | 1,789.9 | 1,880.1
Short-term restricted cash | 5.2 | 5.2 | 5.2
Long-term restricted cash | 0.0 | 0.0 |
Restricted cash and restricted cash equivalents (performance bonds and guaranty fund contributions) | $ 85,670.0 | 85,670.0 | 113,241.6
Income taxes paid |  | 649.7 | 611.7
Interest paid |  | $ 65.0 | $ 65.0

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