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v3.25.1

SEGMENT REPORTING - Schedule of Depreciation Expense Included in Operating Performance (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Segment reporting information |  |  |
Total depreciation expense | $ 439 | $ 428 | $ 411
Operating segments | Flex Agility Solutions |  |  |
Segment reporting information |  |  |
Total depreciation expense | 179 | 171 | 177
Operating segments | Flex Reliability Solutions |  |  |
Segment reporting information |  |  |
Total depreciation expense | 249 | 241 | 217
Corporate & Other |  |  |
Segment reporting information |  |  |
Total depreciation expense | $ 11 | $ 16 | $ 17

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- Definition Depreciation, Adjusted + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Period Type: |