Restructuring (Restructuring Activity) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
November 2015 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Total expected restructuring charges	$ 30.0		$ 30.0
Restructuring Reserve [Roll Forward]
Balance, December 31, 2015			4.5
Net provisions	9.6		16.4
Net benefits charged against the assets			(1.7)
Payments			(13.4)
Foreign currency translation			0.1
Balance, July 1, 2016	5.9		5.9
Total aggregate costs to date			25.0
November 2015 Restructuring Program [Member] | Employee Separation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Total expected restructuring charges	5.0		5.0
Restructuring Reserve [Roll Forward]
Balance, December 31, 2015			1.3
Net provisions	1.1		2.4
Net benefits charged against the assets			0.0
Payments			(1.5)
Foreign currency translation			0.0
Balance, July 1, 2016	2.2		2.2
Total aggregate costs to date			4.6
November 2015 Restructuring Program [Member] | Asset-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Total expected restructuring charges	6.0		6.0
Restructuring Reserve [Roll Forward]
Balance, December 31, 2015			0.0
Net provisions	1.3		1.4
Net benefits charged against the assets			(1.4)
Payments			0.0
Foreign currency translation			0.0
Balance, July 1, 2016	0.0		0.0
Total aggregate costs to date			3.3
November 2015 Restructuring Program [Member] | Other Cost [Member]
Restructuring Cost and Reserve [Line Items]
Total expected restructuring charges	19.0		19.0
Restructuring Reserve [Roll Forward]
Balance, December 31, 2015			3.2
Net provisions	7.2		12.6
Net benefits charged against the assets			(0.3)
Payments			(11.9)
Foreign currency translation			0.1
Balance, July 1, 2016	3.7		3.7
Total aggregate costs to date			17.1
July 2014 Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Balance, December 31, 2015			10.6
Net provisions	4.9	$ 19.2	9.8	$ 35.1
Net benefits charged against the assets			(1.1)
Payments			(13.1)
Foreign currency translation			0.2
Balance, July 1, 2016	6.4		6.4
Total aggregate costs to date			202.8
July 2014 Restructuring Program [Member] | Employee Separation Costs [Member]
Restructuring Reserve [Roll Forward]
Balance, December 31, 2015			7.6
Net provisions	0.6	2.7	1.4	12.2
Net benefits charged against the assets			0.0
Payments			(8.3)
Foreign currency translation			0.2
Balance, July 1, 2016	0.9		0.9
Total aggregate costs to date			51.6
July 2014 Restructuring Program [Member] | Asset-Related Costs [Member]
Restructuring Reserve [Roll Forward]
Balance, December 31, 2015			0.0
Net provisions	0.2	12.8	1.7	14.0
Net benefits charged against the assets			(1.7)
Payments			0.0
Foreign currency translation			0.0
Balance, July 1, 2016	0.0		0.0
Total aggregate costs to date			121.7
July 2014 Restructuring Program [Member] | Other Cost [Member]
Restructuring Reserve [Roll Forward]
Balance, December 31, 2015			3.0
Net provisions	4.1	$ 3.7	6.7	$ 8.9
Net benefits charged against the assets			0.6
Payments			(4.8)
Foreign currency translation			0.0
Balance, July 1, 2016	$ 5.5		5.5
Total aggregate costs to date			$ 29.5