Financial Instruments Financial instruments - Derivatives (Details) - USD ($)
$ in Millions |
3 Months Ended |
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Jan. 31, 2017 |
Jan. 31, 2016 |
Mar. 30, 2018 |
Oct. 01, 2017 |
Apr. 01, 2017 |
Oct. 31, 2016 |
| Interest Rate Swap [Member] |
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| Derivative Instruments, Gain (Loss) [Line Items] |
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| Derivative, Notional Amount |
$ 500.0
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$ 500.0
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| Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member] |
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| Derivative Instruments, Gain (Loss) [Line Items] |
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| Derivative, Gain (Loss) on Derivative, Net |
0.5
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$ 4.3
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| Derivative, Notional Amount |
245.7
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$ 175.0
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| Term A Loan [Member] | Interest Rate Swap [Member] |
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| Derivative Instruments, Gain (Loss) [Line Items] |
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| Derivative, Amount of Hedged Item |
$ 500.0
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| Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate |
1.20%
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| Scenario, Forecast [Member] | Term A Loan [Member] | Interest Rate Swap [Member] |
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| Derivative Instruments, Gain (Loss) [Line Items] |
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| Derivative, Amount of Hedged Item |
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$ 350.0
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$ 400.0
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$ 450.0
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| Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate |
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0.975%
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| Maximum [Member] | Foreign Exchange Forward [Member] |
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| Derivative Instruments, Gain (Loss) [Line Items] |
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| Derivative, Maturity Period (Days) |
90 months
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