Equity - Movement in Number of Shares in Issue (Details) - shares	6 Months Ended
Jun. 27, 2020	Jun. 29, 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)	400,573	246,924
Vesting of restricted stock units, net of witholding taxes (in shares)	196,984	7,153
Balance as of the end of the period (in shares)	290,754,856	290,101,651

Number of share options (or share units) exercised during the current period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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Period Type:	duration