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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Supplemental Cash Flow Elements [Abstract] |  |  |  |  |
Cash payments related to operating lease liabilities | [1] | $ 391 | $ 394 |  |
Interest Paid |  | 799 | 739 |  |
Income Taxes Paid, Net |  | 12 | 8 |  |
Right-of-use assets recorded in exchange for operating lease liabilities |  | 118 | (39) |  |
Increase (decrease) in accounts payable for purchases of property and equipment |  | 2 | (6) |  |
Purchase of property and equipment under capital leases and installment purchases |  | 18 | 43 |  |
Cash and cash equivalents |  | 57 |  | $ 100 |
Restricted cash and cash equivalents, current |  | 176 |  | 170 |
Cash, Cash Equivalents, Restricted Cash and Cash Equivalents | [2] | 255 | $ 371 | 295 | $ 281
Continuing Operations |  |  |  |  |
Cash and cash equivalents |  | 57 |  | 100 |
Restricted cash and cash equivalents, current |  | 176 |  | 170 |
Restricted Cash and Cash Equivalent, Noncurrent |  | 5 |  | 5 |
Cash, Cash Equivalents, Restricted Cash and Cash Equivalents |  | 238 |  | 275 |
Discontinued Operations |  |  |  |  |
Cash and cash equivalents |  | 16 |  | 19 |
Restricted cash and cash equivalents, current |  | 1 |  | 1 |
Restricted Cash and Cash Equivalent, Noncurrent |  | 0 |  | 0 |
Cash, Cash Equivalents, Restricted Cash and Cash Equivalents |  | 17 |  | 20 |
Consolidated - Continuing and Discontinued Operations |  |  |  |  |
Cash and cash equivalents |  | 73 |  | 119 |
Restricted cash and cash equivalents, current |  | 177 |  | 171 |
Restricted Cash and Cash Equivalent, Noncurrent |  | 5 |  | 5 |
Cash, Cash Equivalents, Restricted Cash and Cash Equivalents |  | $ 255 |  | $ 295 |
[1] | Excludes the Company's contingent payments pursuant to operating leases, which are recorded as expense in the period such contingencies are resolved.
[2] | Inclusive of cash and cash equivalents and restricted cash and cash equivalents included in discontinued operations. See note 12.

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