Goodwill and Other Intangible Assets (Schedule of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,130,750	$ 1,059,323
Accumulated Amortization	766,311	654,018
Intangible assets, net	364,439	405,305
Customer Lists
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	500,914	465,909
Accumulated Amortization	271,211	229,545
Purchased software
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	364,144	361,964
Accumulated Amortization	353,722	311,738
Internal use software
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	174,572	143,520
Accumulated Amortization	99,272	78,633
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	41,731	40,025
Accumulated Amortization	26,574	21,275
Other Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	49,389	47,905
Accumulated Amortization	$ 15,532	$ 12,827