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Schedule I - Condensed Financial Information of Parent - Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
OPERATING ACTIVITIES: |  |  |
Net cash provided by operating activities | $ 8,323 | $ 7,344 | $ 6,554
INVESTING ACTIVITIES: |  |  |
Other investing activities | 1 | 3 | (15)
Net cash provided by (used in) investing activities | 129 | 1,486 | (518)
FINANCING ACTIVITIES: |  |  |
Proceeds from the issuance of long-term debt | 4,836 | 1,893 | 3,621
Payments on maturity and conversion of debt | (1,312) | (500) | (1,880)
Payments for repurchase of common stock | 6,509 | 10,377 | 6,621
Dividends paid | (1,174) | 0 | 0
Proceeds from exercise of stock options | 14 | 134 | 7
Other financing activities | (59) | (59) | (24)
Net cash used in financing activities | (4,204) | (8,909) | (4,897)
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents | 4,058 | (116) | 1,099
Total cash and cash equivalents and restricted cash and cash equivalents, beginning of period | 12,135 | 12,251 | 11,152
Total cash and cash equivalents and restricted cash and cash equivalents, end of period | 16,193 | 12,135 | 12,251
Parent Company |  |  |
OPERATING ACTIVITIES: |  |  |
Net cash provided by operating activities | 6,414 | 6,464 | 3,695
INVESTING ACTIVITIES: |  |  |
Proceeds from internal transfers of subsidiaries | 0 | 0 | 174
Dividends received | 139 | 107 | 3,087
Other investing activities | (37) | (128) | (102)
Net cash provided by (used in) investing activities | 102 | (21) | 3,159
FINANCING ACTIVITIES: |  |  |
Proceeds from the issuance of long-term debt | 4,836 | 1,893 | 3,621
Payments on maturity and conversion of debt | (1,312) | (500) | (1,880)
Payments for repurchase of common stock | 6,509 | 10,377 | 6,621
Dividends paid | (1,174) | 0 | 0
Proceeds from exercise of stock options | 14 | 134 | 7
Other financing activities | 50 | 49 | 47
Net cash used in financing activities | (4,095) | (8,801) | (4,826)
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents | 2,421 | (2,358) | 2,028
Total cash and cash equivalents and restricted cash and cash equivalents, beginning of period | 1,752 | 4,110 | 2,082
Total cash and cash equivalents and restricted cash and cash equivalents, end of period | $ 4,173 | $ 1,752 | $ 4,110

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