Acquisition (Details) - USD ($) $ in Millions	Oct. 31, 2018	May 14, 2018	Apr. 30, 2018
Assets acquired:
Goodwill	$ 6,474.7		$ 5,942.2
Ainsworth [Member]
Assets acquired:
Cash and cash equivalents		$ 1.6
Trade receivables		66.3
Inventories		97.8
Other current assets		4.8
Property, plant, and equipment		83.8
Goodwill		680.9
Other intangible assets		1,239.6
Other noncurrent assets		0.3
Total assets acquired		2,175.1
Liabilities assumed:
Current liabilities		82.5
Deferred tax liabilities		172.0
Other noncurrent liabilities		16.0
Total liabilities assumed		270.5
Net assets acquired		$ 1,904.6