Consolidated and Combined Statements of Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Dec. 30, 2016	Dec. 29, 2017	Sep. 30, 2016	Sep. 25, 2015
Income Statement [Abstract]
Tax (benefit) expense on income (loss) from discontinued operations	$ 15.3	$ 5.4	$ 43.5	$ 47.9

- Definition

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

+ References + Details