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SCHEDULE I - PARENT COMPANY FINANCIAL INFORMATION (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items] |  |  |
Net cash provided by operating activities | $ 2,966 | $ 3,981 | $ 4,587
Cash flows from investing activities: |  |  |
Acquisitions, net of cash acquired | (89) | (233) | (337)
Purchases of property and equipment, net | (575) | (1,004) | (1,137)
Purchases of investment securities | (8,185) | (7,552) | (6,049)
Proceeds from sale of investment securities | 3,376 | 3,795 | 2,434
Maturities of investment securities | 2,982 | 1,292 | 1,365
Other | (50) | 0 | 0
Net cash used in investing activities | (2,952) | (3,492) | (1,006)
Cash flows from financing activities: |  |  |
Proceeds from issuance of senior notes, net | 2,232 | 2,544 | 1,982
Repayments of senior notes | (1,107) | (1,832) | (1,000)
(Repayments) proceeds from issuance of commercial paper, net | (907) | 211 | (376)
Change in book overdraft | 50 | 55 | (28)
Common stock repurchases | (817) | (1,573) | (2,096)
Dividends paid | (431) | (431) | (392)
Net cash used in financing activities | (2,487) | (856) | (1,914)
(Decrease) increase in cash and cash equivalents | (2,473) | (367) | 1,667
Cash and cash equivalents at beginning of period | 4,694 | 5,061 | 3,394
Cash and cash equivalents at end of period | 2,221 | 4,694 | 5,061
Parent Company |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Net cash provided by operating activities | 3,454 | 3,042 | 4,868
Cash flows from investing activities: |  |  |
Acquisitions, net of cash acquired | (89) | (233) | (337)
Capital contributions to operating subsidiaries | (1,698) | (792) | (484)
Purchases of property and equipment, net | (426) | (761) | (931)
Purchases of investment securities | (16) | (17) | (63)
Proceeds from sale of investment securities | 0 | 41 | 468
Maturities of investment securities | 32 | 67 | 30
Other | (50) | 0 | 0
Net cash used in investing activities | (2,247) | (1,695) | (1,317)
Cash flows from financing activities: |  |  |
Proceeds from issuance of senior notes, net | 2,225 | 2,537 | 1,976
Repayments of senior notes | (1,107) | (1,832) | (1,000)
(Repayments) proceeds from issuance of commercial paper, net | (907) | 211 | (376)
Repayment of term loan | 0 | (500) | (2,000)
Change in book overdraft | (5) | 2 | 5
Common stock repurchases | (817) | (1,573) | (2,096)
Dividends paid | (431) | (431) | (392)
Proceeds from stock option exercises and other | (86) | (125) | 40
Net cash used in financing activities | (1,128) | (1,711) | (3,843)
(Decrease) increase in cash and cash equivalents | 79 | (364) | (292)
Cash and cash equivalents at beginning of period | 250 | 614 | 906
Cash and cash equivalents at end of period | $ 329 | $ 250 | $ 614

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