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Goodwill and Other Intangible Assets (Details 2) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Identifiable intangibles |  |  |  |  |
Gross Carrying Amount | $ 134 |  | $ 134 |  | $ 165
Accumulated Amortization | (68) |  | (68) |  | (61)
Net | 66 |  | $ 66 |  | 104
Finite-Lived Intangible Asset, Useful Life |  |  | 20 years |  |
Amortization expense | 2 | $ 2 | $ 6 | $ 6 |
Long-lived and intangible asset impairment | 236 | $ 0 | 236 | $ 0 |
Total estimated amortization expense for the five succeeding fiscal years |  |  |  |  |
Remainder of 2021 | 1 |  | 1 |  |
2022 | 7 |  | 7 |  |
2023 | 15 |  | 15 |  |
2024 | 9 |  | 9 |  |
2025 | 4 |  | 4 |  |
2026 | 4 |  | 4 |  |
U.K. |  |  |  |  |
Identifiable intangibles |  |  |  |  |
Long-lived and intangible asset impairment |  |  | 50 |  |
Long-lived assets | 450 |  | 450 |  |
Customer relationships |  |  |  |  |
Identifiable intangibles |  |  |  |  |
Gross Carrying Amount | 84 |  | 84 |  | 133
Accumulated Amortization | (58) |  | (58) |  | (52)
Net | 26 |  | 26 |  | 81
Long-lived and intangible asset impairment |  |  | 49 |  |
Trade names |  |  |  |  |
Identifiable intangibles |  |  |  |  |
Gross Carrying Amount | 31 |  | 31 |  | 32
Accumulated Amortization | (10) |  | (10) |  | (9)
Net | 21 |  | 21 |  | 23
Long-lived and intangible asset impairment |  |  | 1 |  |
Customer Relationships and Trade Names | U.K. |  |  |  |  |
Identifiable intangibles |  |  |  |  |
Long-lived assets | 30 |  | 30 |  |
U.K. carbon credits |  |  |  |  |
Identifiable intangibles |  |  |  |  |
Gross Carrying Amount | 19 |  | 19 |  | 0
Accumulated Amortization | 0 |  | 0 |  | 0
Net | $ 19 |  | $ 19 |  | $ 0

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