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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2018 | Apr. 01, 2017 | Mar. 31, 2018 | Apr. 01, 2017 | Sep. 30, 2018 | Oct. 01, 2018 | Jan. 31, 2018
Income Tax Examination [Line Items] |  |  |  |  |  |  |
Company's effective tax rate | 1.40% | 45.60% | 53.80% | 43.40% |  |  |
Income tax benefit for remeasurements of deferred tax deferred tax liability as result of change in tax rate | $ 353.0 |  |  |  |  |  |
Charge for transition taxes related to the deemed repatriation of foreign earnings | 26.0 |  |  |  |  |  |
Estimated net benefit effect of existing deferred tax balances and transition tax due to change in tax rate | 327.0 |  |  |  |  |  |
Provisional net benefit amount recorded for remeasurements of deferred tax balance due to change in rate | 353.0 |  |  |  |  |  |
State and Local Jurisdiction [Member] |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |
Settlement liability of state tax audit |  |  |  |  |  |  | $ 11.0
State and Local Jurisdiction [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |
Reversal of selling and administrative expense due to settlement of state tax audit | $ 4.0 |  |  |  |  |  |
Scenario, Forecast [Member] |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |
Blended statutory income tax rate |  |  |  |  | 24.50% |  |
Projected tax rate at which deferred tax assets and liabilities positions will reverse |  |  |  |  | 24.50% | 21.00% |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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