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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jul. 01, 2017 | Jul. 02, 2016 | Jun. 27, 2015
Changes in accumulated other comprehensive income (loss) by component |  |  |
Balance | $ 689.3 | $ 1,101.4 | $ 1,187.7
Other comprehensive income (loss) before reclassification | 97.6 |  |
Amounts reclassified from accumulated other comprehensive income | (200.0) |  |
Net change in accumulated other comprehensive (loss) income | (102.4) | 65.8 | (59.1)
Balance | 786.4 | 689.3 | 1,101.4
Unrealized net actuarial gain | 2.1 |  |
Tax expense for unrealized net actuarial gains | 1.4 |  |
Marketable equity securities | Lumentum |  |  |
Changes in accumulated other comprehensive income (loss) by component |  |  |
Unrealized gain on marketable equity securities | 92.6 |  |
Tax impact for unrealized holding gains on marketable equity securities | 0.0 |  |
Total |  |  |
Changes in accumulated other comprehensive income (loss) by component |  |  |
Balance | 10.0 | (48.0) | 11.1
Net change in accumulated other comprehensive (loss) income | (102.4) | 65.8 | (59.1)
Balance | (92.4) | 10.0 | $ (48.0)
Unrealized gains (losses) on available-for-sale investments |  |  |
Changes in accumulated other comprehensive income (loss) by component |  |  |
Balance | 104.5 |  |
Other comprehensive income (loss) before reclassification | 92.1 |  |
Amounts reclassified from accumulated other comprehensive income | (201.9) |  |
Net change in accumulated other comprehensive (loss) income | (109.8) |  |
Balance | (5.3) | 104.5 |
Foreign currency translation adjustments, net of tax |  |  |
Changes in accumulated other comprehensive income (loss) by component |  |  |
Balance | (70.1) |  |
Other comprehensive income (loss) before reclassification | 4.8 |  |
Amounts reclassified from accumulated other comprehensive income | 0.0 |  |
Net change in accumulated other comprehensive (loss) income | 4.8 |  |
Balance | (65.3) | (70.1) |
Defined benefit obligation, net of tax |  |  |
Changes in accumulated other comprehensive income (loss) by component |  |  |
Balance | (24.4) |  |
Other comprehensive income (loss) before reclassification | 0.7 |  |
Amounts reclassified from accumulated other comprehensive income | 1.9 |  |
Net change in accumulated other comprehensive (loss) income | 2.6 |  |
Balance | $ (21.8) | $ (24.4) |

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