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Restructuring and Related Activities (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring Charges | $ 0 | $ (38) | $ 0 | $ (67) |  |  |  |
2023 Restructuring Plan |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring Charges | 0 | (2) | 0 | 11 |  |  |  |
Payments for Restructuring | 0 | (3) | (3) | (20) |  |  |  |
Restructuring Reserve, Settled without Cash | 0 | 0 | 0 | (4) |  |  |  |
Restructuring Reserve | 4 | $ 10 | 4 | $ 10 | $ 4 | $ 7 | $ 15 | $ 23
Employee headcount reduction |  | 15.00% |  | 15.00% |  |  |  |
2024 Restructuring Plan |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring Charges | 0 | $ 40 | 0 | $ 56 |  |  |  |
Payments for Restructuring | (3) | (8) | (13) | (11) |  |  |  |
Restructuring Reserve, Settled without Cash | 0 | (1) | 0 | (7) |  |  |  |
Restructuring Reserve | $ 23 | 38 | $ 23 | 38 | 26 | 36 | 7 | 0
Employee headcount reduction | 10.00% |  | 10.00% |  |  |  |  |
Employee Severance | 2023 Restructuring Plan |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring Charges | $ 0 | (2) | $ 0 | 0 |  |  |  |
Payments for Restructuring | 0 | 0 | (1) | (10) |  |  |  |
Restructuring Reserve, Settled without Cash | 0 | 0 | 0 | 0 |  |  |  |
Restructuring Reserve | 1 | 2 | 1 | 2 | 1 | 2 | 4 | 12
Employee Severance | 2024 Restructuring Plan |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring Charges | 0 | (3) | 0 | 6 |  |  |  |
Payments for Restructuring | 0 | (6) | (2) | (9) |  |  |  |
Restructuring Reserve, Settled without Cash | 0 | 3 | 0 | 4 |  |  |  |
Restructuring Reserve | 0 | 1 | 0 | 1 | 0 | 2 | 7 | 0
Facility Closing | 2023 Restructuring Plan |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring Charges | 0 | 0 | 0 | 11 |  |  |  |
Payments for Restructuring | 0 | (3) | (2) | (10) |  |  |  |
Restructuring Reserve, Settled without Cash | 0 | 0 | 0 | (4) |  |  |  |
Restructuring Reserve | 3 | 8 | 3 | 8 | 3 | 5 | 11 | 11
Facility Closing | 2024 Restructuring Plan |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring Charges | 0 | 43 | 0 | 50 |  |  |  |
Payments for Restructuring | (3) | (2) | (11) | (2) |  |  |  |
Restructuring Reserve, Settled without Cash | 0 | (4) | 0 | (11) |  |  |  |
Restructuring Reserve | $ 23 | $ 37 | $ 23 | $ 37 | $ 26 | $ 34 | $ 0 | $ 0

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