Restructuring (Restructuring Charges and Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Net gain on sale of facility		$ (0.1)	$ (0.8)	$ 4.1
Net cash proceeds from sale		2.8	3.8	6.1
Restructuring Reserve [Roll Forward]
Balance at beginning of period		8.4	20.5	15.4
Provision/(income)		(0.4)	5.5	30.1
(Cash expenditures)/Proceeds		(6.7)	(16.9)	(23.3)
Non-cash Items/ Currency Change		(0.3)	(0.7)	(1.7)
Balance at end of period		1.0	8.4	20.5
Employee termination costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period		7.8	19.1	15.2
Provision/(income)		(0.6)	4.3	26.4
(Cash expenditures)/Proceeds		(6.1)	(15.3)	(22.5)
Non-cash Items/ Currency Change		(0.3)	(0.3)	0.0
Balance at end of period		$ 0.8	7.8	19.1
Period over which restructuring and related costs are to be paid		3 months
Termination of lease agreements
Restructuring Reserve [Roll Forward]
Balance at beginning of period		$ 0.6	1.4	0.2
Provision/(income)		0.2	0.5	1.9
(Cash expenditures)/Proceeds		(0.6)	(1.5)	(0.7)
Non-cash Items/ Currency Change		0.0	0.2	0.0
Balance at end of period		$ 0.2	0.6	1.4
Period over which restructuring and related costs are to be paid		3 months
Asset impairment/net loss on disposal of assets resulting from restructuring activities
Restructuring Reserve [Roll Forward]
Balance at beginning of period		$ 0.0	0.0	0.0
Provision/(income)			0.6	1.2
(Cash expenditures)/Proceeds			0.0	0.5
Non-cash Items/ Currency Change			(0.6)	(1.7)
Balance at end of period			0.0	0.0
Other
Restructuring Reserve [Roll Forward]
Balance at beginning of period		$ 0.0	0.0	0.0
Provision/(income)			0.1	0.6
(Cash expenditures)/Proceeds			(0.1)	(0.6)
Non-cash Items/ Currency Change			0.0	0.0
Balance at end of period			0.0	0.0
Buildings
Restructuring Cost and Reserve [Line Items]
Net gain on sale of facility				2.5
Net cash proceeds from sale	$ 1.0		$ 3.2	$ 3.8