Post Employment Plans - Projected Benefit Obligation (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2015		Dec. 31, 2017	Dec. 31, 2016		Jun. 27, 2015
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning			$ 138.2	$ 126.7
Fair value of plan assets at end of period	$ 126.7		162.5	138.2
Pension plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning	140.3		158.9	135.0
Acquisitions	5.6		0.0	0.0
Curtailment	0.0		(1.0)	0.0
Service costs	2.2		4.5	4.1		$ 0.9	[1]
Interest cost	1.7		3.3	3.6		2.4	[1]
Actuarial (gain) loss	(10.1)		(10.3)	22.6
Contributions paid	0.0		0.1	0.3
Benefits paid	(0.6)		(2.5)	(1.7)
Foreign currency translation	(4.1)		21.0	(5.0)
Projected benefit obligation, ending	135.0		174.0	158.9		140.3
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning	128.1		138.2	126.7
Purchases, sales and settlements, net	3.2		0.0	0.0
Actual return on plan assets	(1.7)		5.5	9.4
Benefits paid	(0.6)		(2.5)	(1.7)
Employer contributions	1.4		2.2	8.2
Contributions paid	0.0		0.1	0.3
Foreign currency translation	(3.7)		19.0	(4.7)
Fair value of plan assets at end of period	126.7		162.5	138.2		128.1
Funded (unfunded) status	(8.3)		(11.5)	(20.7)
Presented as:
Other non-current assets	16.5		22.0	10.4
Other non-current liabilities	(24.8)		(33.5)	(31.1)
Other Postretirement Benefits Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning	6.0	[1]	5.8	7.0	[1]
Acquisitions	0.0	[1]	0.0	0.0
Curtailment	0.0		0.0	0.0
Service costs	0.3	[1]	0.6	0.6		0.3	[1]
Interest cost	0.1	[1]	0.2	0.2		0.2	[1]
Actuarial (gain) loss	0.5	[1]	(0.3)	(1.9)
Contributions paid	0.0	[1]	0.0	0.0
Benefits paid	(0.1)	[1]	(0.1)	(0.1)
Foreign currency translation	0.1	[1]	0.0	0.0
Projected benefit obligation, ending	7.0	[1]	6.2	5.8		6.0	[1]
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning	0.0	[1]	0.0	0.0	[1]
Purchases, sales and settlements, net	0.0	[1]	0.0	0.0
Actual return on plan assets	0.0	[1]	0.0	0.0
Benefits paid	0.0	[1]	0.0	0.0
Employer contributions	0.0	[1]	0.0	0.0
Contributions paid	0.0	[1]	0.0	0.0
Foreign currency translation	0.0	[1]	0.0	0.0
Fair value of plan assets at end of period	0.0	[1]	0.0	0.0		$ 0.0	[1]
Funded (unfunded) status	(7.0)	[1]	(6.2)	(5.8)
Presented as:
Other non-current assets	0.0	[1]	0.0	0.0
Other non-current liabilities	$ (7.0)	[1]	$ 0.0	$ (5.8)

[1] Includes Omega activity from March 30, 2015 to June 27, 2015