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Accumulated Other Comprehensive Loss (Tables) | 6 Months Ended
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Mar. 28, 2020
Accumulated Other Comprehensive Income [Abstract] |
Changes in Accumulated Other Comprehensive Income | The following tables summarize the changes in accumulated balances of other comprehensive loss for the periods presented:
| Three Months Ended March 28, 2020 |  | Six Months Ended March 28, 2020
| Foreign Currency Translation |  | Pension Plans |  | Hedged Interest Rate Caps |  | Hedged Interest Rate Swaps |  | Total |  | Foreign Currency Translation |  | Pension Plans |  | Hedged Interest Rate Caps |  | Hedged Interest Rate Swaps | Total
Beginning Balance | $ | (33.1 | ) |  | $ | (1.7 | ) |  | $ | (1.4 | ) |  | $ | 7.5 |  |  | $ | (28.7 | ) |  | $ | (41.4 | ) |  | $ | (1.7 | ) |  | $ | (2.7 | ) |  | $ | 3.5 |  | $ | (42.3 | )
Other comprehensive income (loss) before reclassifications | (5.4 | ) |  | — |  |  | (0.1 | ) |  | (25.1 | ) |  | (30.6 | ) |  | 2.9 |  |  | — |  |  | (0.1 | ) |  | (21.1 | ) | (18.3 | )
Amounts reclassified to statement of income | — |  |  | — |  |  | 0.4 |  |  | — |  |  | 0.4 |  |  | — |  |  | — |  |  | 1.7 |  |  | — |  | 1.7 |
Ending Balance | $ | (38.5 | ) |  | $ | (1.7 | ) |  | $ | (1.1 | ) |  | $ | (17.6 | ) |  | $ | (58.9 | ) |  | $ | (38.5 | ) |  | $ | (1.7 | ) |  | $ | (1.1 | ) |  | $ | (17.6 | ) | $ | (58.9 | )
| Three Months Ended March 30, 2019 |  | Six Months Ended March 30, 2019
| Foreign Currency Translation |  | Pension Plans |  | Hedged Interest Rate Caps |  | Total |  | Foreign Currency Translation |  | Pension Plans |  | Hedged Interest Rate Caps |  | Total
Beginning Balance | $ | (29.8 | ) |  | $ | (1.1 | ) |  | $ | (1.0 | ) |  | $ | (31.9 | ) |  | $ | (26.6 | ) |  | $ | (1.1 | ) |  | $ | 2.2 |  |  | $ | (25.5 | )
Other comprehensive income (loss) before reclassifications | 2.4 |  |  | — |  |  | (1.5 | ) |  | 0.9 |  |  | (0.8 | ) |  | — |  |  | (5.4 | ) |  | (6.2 | )
Amounts reclassified to statement of income | — |  |  | — |  |  | 0.5 |  |  | 0.5 |  |  | — |  |  | — |  |  | 1.2 |  |  | 1.2 |
Ending Balance | $ | (27.4 | ) |  | $ | (1.1 | ) |  | $ | (2.0 | ) |  | $ | (30.5 | ) |  | $ | (27.4 | ) |  | $ | (1.1 | ) |  | $ | (2.0 | ) |  | $ | (30.5 | )

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- Definition Accumulated Other Comprehensive Income [Abstract] + References No definition available. + Details
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Namespace Prefix: | holx_
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration