Acquisition (Acquired Identifiable Intangible Assets) (Details) - USD ($) $ in Millions		9 Months Ended
	Sep. 01, 2017	Sep. 30, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition		$ 64.4
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition		$ 21.4
Precision Planting LLC [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition	$ 64.4
Precision Planting LLC [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition	$ 21.4
Acquired finite-lived intangible assets, weighted average useful life	14 years
Precision Planting LLC [Member] | Technology-Based Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition	$ 25.1
Acquired finite-lived intangible assets, weighted average useful life	10 years
Precision Planting LLC [Member] | Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition	$ 17.9
Acquired finite-lived intangible assets, weighted average useful life	20 years