Retirement Benefit Plans (Net Funded Status and Amounts Recognized in Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated other comprehensive loss (pretax)	$ 66.2	$ 49.3
Accrued benefit liabilty	(170.9)	(160.3)
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Accumulated benefit obligation	191.8	156.3
Fair value of plan assets	74.3	54.3
Pension Benefits [Member]
Change in Benefit Obligation [Roll Forward]
Service cost	10.8	11.5	9.9
Interest cost	8.6	8.4	8.9
Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	114.9
Ending balance	114.8	114.9
Accumulated Other Comprehensive Income (Loss) [Abstract]
Unrecognized transition obligation	1.3	0.3
Unrecognized prior service cost (benefit)	3.6	3.9
Unreocognized net actuarial loss	69.0	45.6
Accumulated other comprehensive loss (pretax)	73.9	49.8
Accumulated benefit obligation	218.5	213.0
U.S. Pension Benefits [Member]
Change in Benefit Obligation [Roll Forward]
Beginning balance, benefit obligations	55.9	67.5
New Plan, beginning balance	0	0
Service cost	0.3	0.3
Interest cost	2.1	2.1
Actuarial loss (gain)	11.5	(9.3)
Benefits paid	(2.2)	(0.8)
Impact of exchange rates	0	0
Plan participant contributions	0	0
Settlements/Curtailments	0	(3.9)
Ending balance, benefit obligations	67.6	55.9
Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	32.3	31.7
Actual return on plan assets	3.9	4.8
Company contributions	1.8	0.8
Plan participant contributions	0	0
Benefits and expenses paid	(2.5)	(1.1)
Impact of exchange rates	0	0
Settlements	0	(3.9)
Ending balance	35.5	32.3
Funded status of plan	(32.1)	(23.6)
Foreign Pension Benefits [Member]
Change in Benefit Obligation [Roll Forward]
Beginning balance, benefit obligations	190.4	198.1
New Plan, beginning balance	0	3.6
Service cost	10.7	11.0
Interest cost	6.4	6.3
Actuarial loss (gain)	25.1	(1.9)
Benefits paid	(12.1)	(9.6)
Impact of exchange rates	(21.3)	(3.7)
Plan participant contributions	1.8	0.7
Settlements/Curtailments	(3.3)	(14.1)
Ending balance, benefit obligations	197.7	190.4
Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	82.6	86.6
Actual return on plan assets	4.7	7.4
Company contributions	13.4	13.5
Plan participant contributions	1.8	1.3
Benefits and expenses paid	(12.0)	(10.0)
Impact of exchange rates	(7.6)	(2.1)
Settlements	(3.6)	(14.1)
Ending balance	79.3	82.6
Funded status of plan	(118.4)	(107.8)
Postretirement Benefits [Member]
Change in Benefit Obligation [Roll Forward]
Service cost	0.1	0.2	0.1
Interest cost	1.1	1.1	1.2
Accumulated Other Comprehensive Income (Loss) [Abstract]
Unrecognized transition obligation	0	0
Unrecognized prior service cost (benefit)	(10.6)	(4.6)
Unreocognized net actuarial loss	2.9	4.1
Accumulated other comprehensive loss (pretax)	(7.7)	(0.5)
U.S. Postretirement Benefit [Member]
Change in Benefit Obligation [Roll Forward]
Beginning balance, benefit obligations	28.9	33.1
New Plan, beginning balance	0	0
Service cost	0.1	0.2
Interest cost	1.1	1.1
Actuarial loss (gain)	(7.8)	(3.2)
Benefits paid	(1.8)	(2.2)
Impact of exchange rates	(0.1)	(0.1)
Plan participant contributions	0	0
Settlements/Curtailments	0	0
Ending balance, benefit obligations	20.4	28.9
Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0	0
Actual return on plan assets	0	0
Company contributions	1.8	2.2
Plan participant contributions	0	0
Benefits and expenses paid	(1.8)	(2.2)
Impact of exchange rates	0	0
Settlements	0	0
Ending balance	0	0
Funded status of plan	$ (20.4)	$ (28.9)