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Restructuring Charges - Summary of Restructuring Charges (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 134 | $ 229 | $ 0
NextGen Program |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 134 | 229 |
Employee separation costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 85 | 115 |
Employee separation costs | NextGen Program |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 85 | 115 |
Facility exit costs | NextGen Program |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 36 | 108 |
Lease restructuring | 23 | 71 |
Accelerated depreciation | 13 | 36 |
Impairment of long-lived |  | 1 |
Third party and other costs | NextGen Program |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 13 | $ 6 |

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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-2 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482130/360-10-45-4 + Details
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