Goodwill and Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill	$ 4,407,800,000	$ 4,225,500,000	$ 4,021,900,000
Accumulated impairment losses	(206,600,000)	(46,600,000)	0
Goodwill [Roll Forward]
Goodwill Balance	4,178,900,000	4,021,900,000
Addition from acquisitions		66,900,000
Purchase accounting adjustments		44,800,000
Impairment write-off	(160,000,000)	(46,600,000)	0
Foreign currency translation	182,300,000	91,900,000
Goodwill Balance	4,201,200,000	4,178,900,000	4,021,900,000
Performance Solutions
Goodwill [Line Items]
Goodwill	2,299,200,000	2,179,000,000	2,147,200,000
Accumulated impairment losses	(46,600,000)	(46,600,000)	0
Goodwill [Roll Forward]
Goodwill Balance	2,132,400,000	2,147,200,000
Addition from acquisitions		66,900,000
Purchase accounting adjustments		29,700,000
Impairment write-off	0
Foreign currency translation	120,200,000	(64,800,000)
Goodwill Balance	2,252,600,000	2,132,400,000	2,147,200,000
Agricultural Solutions
Goodwill [Line Items]
Goodwill	2,108,600,000	2,046,500,000	1,874,700,000
Accumulated impairment losses	(160,000,000)	0	0
Goodwill [Roll Forward]
Goodwill Balance	2,046,500,000	1,874,700,000
Addition from acquisitions		0
Purchase accounting adjustments		15,100,000
Impairment write-off	(160,000,000)	0
Foreign currency translation	62,100,000	156,700,000
Goodwill Balance	$ 1,948,600,000	2,046,500,000	$ 1,874,700,000
Offshore Solutions | Performance Solutions
Goodwill [Roll Forward]
Impairment write-off		$ (46,600,000)