Equity - Movement in Number of Shares in Issue (Details) - shares	9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019
Increase (Decrease) in Stockholders' Equity
Balance as of the beginning of the period (in shares)	290,157,299	289,847,574
Exercise of share options (in shares)	424,726	257,322
Vesting of restricted stock units, net of withholding taxes (in shares)	205,145	13,229
Balance as of the end of the period (in shares)	290,787,170	290,118,125