Sales Of Receivables (Summary of Cash Proceeds Received) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2024 |
Sep. 30, 2023 |
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Net cash received from receivables programs | $ 370 | $ 396 | $ 64 | $ 1,080 |
| Equipment Installment | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Net cash received from receivables programs | (568) | 293 | (1,121) | 233 |
| Cash proceeds received | 2,442 | 2,937 | 7,848 | 8,122 |
| Revolving Receivables Program | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Net cash received from receivables programs | 938 | 479 | 1,185 | 1,479 |
| Cash proceeds received | 5,620 | 4,053 | 14,466 | 5,053 |
| Other Sales of Receivables | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Net cash received from receivables programs | $ 0 | $ (376) | $ 0 | $ (632) |