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Non-Derivative Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2026
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | XPLR’s fair value measurements made on a recurring basis by fair value hierarchy level are as follows:
| March 31, 2026 |  | December 31, 2025
| Level 1 |  | Level 2 |  | Total |  | Level 1 |  | Level 2 |  | Total
| (millions)
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash equivalents | $ | 500 |  |  | $ | — |  |  | $ | 500 |  |  | $ | 623 |  |  | $ | — |  |  | $ | 623 |
Total assets | $ | 500 |  |  | $ | — |  |  | $ | 500 |  |  | $ | 623 |  |  | $ | — |  |  | $ | 623 |
Schedule of other financial instrument, carrying amounts and estimated fair values | The carrying amounts and estimated fair values of other financial instruments recorded at other than fair value are as follows:
| March 31, 2026 |  | December 31, 2025
| Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value
| (millions)
Long-term debt, including current maturities(a) | $ | 6,328 |  |  | $ | 6,469 |  |  | $ | 6,202 |  |  | $ | 6,312 |
____________________ (a) At March 31, 2026 and December 31, 2025, approximately $6,455 million and $6,298 million, respectively, of the fair value is estimated using a market approach based on quoted market prices for the same or similar issues (Level 2); the balance is estimated using an income approach utilizing a discounted cash flow valuation technique, considering the current credit profile of the debtor (Level 3). At March 31, 2026 and December 31, 2025, approximately $496 million and $494 million, respectively, of the fair value relates to the 2022 convertible notes and is Level 2.

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-13 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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