Share Plans (Schedule of Share Option Activity) (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended	12 Months Ended
Dec. 30, 2022	Jun. 16, 2022	Dec. 31, 2021	Dec. 25, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
(Benefit) expense from income taxes	$ (52.0)	$ (497.3)	$ (106.3)	$ 8.9
Share Option Activity [Roll Forward]
Beginning balance	0	5,553,519	6,069,712	6,890,700
Expired/Forfeited		(5,553,519)	(516,193)	(820,988)
Ending balance	890,485	0	5,553,519	6,069,712
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted-average exercise price, expired and forfeited share options		$ 35.05	$ 45.63	$ 39.65

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

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Number of options outstanding, including both vested and non-vested options.

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