Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jul. 01, 2018	Apr. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Income Tax Disclosure [Abstract]
Effective income tax rate	18.20%	17.70%		18.50%	18.30%
Discrete items	$ 4.3	$ 3.4		$ 7.4	$ 5.5
Discrete tax expense (benefit), share-based accounting	$ 4.8	$ 4.7		$ 7.7	$ 7.7
Tax Cuts and Jobs Act measurement period adjustments			$ 0.6
Effective tax rate excluding discrete items	21.60%	21.00%		21.90%	21.30%

Effective Income Tax Rate Reconciliation, Discrete Items, Amount

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Effective Income Tax Rate Reconciliation, Percent Excluding Discrete Items

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

+ References

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Amount of income tax expense (benefit) for measurement period adjustment from accounting for tax effect pursuant to Tax Cuts and Jobs Act.

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