Restructuring Plans (Details)			3 Months Ended		9 Months Ended		12 Months Ended	22 Months Ended	44 Months Ended
	Feb. 21, 2017 USD ($)	Feb. 05, 2015	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)
Corporate Relocation Plan
Restructuring Cost and Reserve [Line Items]
Restructuring, number of positions affected		350
Restructuring charges					$ 3,400,000
Restructuring charges incurred to date			$ 35,200,000		35,200,000
DSD Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred to date			4,500,000		4,500,000
Employee-related | Corporate Relocation Plan
Restructuring Cost and Reserve [Line Items]
Payments									$ 17,400,000
Employee-related | DSD Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			100,000	$ 0	1,300,000	$ 24,000
Payments								$ 2,600,000
Facility Closing | Corporate Relocation Plan
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation									2,300,000
Payments									7,000,000
Other Restructuring | Corporate Relocation Plan
Restructuring Cost and Reserve [Line Items]
Payments									7,400,000
Sale Leaseback Transaction, Rent Expense							$ 1,400,000
Other Restructuring | DSD Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1,500	$ 100,000	200,000	$ 300,000
Payments								$ 1,900,000
Pension withdrawal liability | Corporate Relocation Plan
Restructuring Cost and Reserve [Line Items]
Payments									$ 3,400,000
Pension withdrawal liability | DSD Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments					4,400,000
Expected cost remaining			100,000		100,000
Maximum | DSD Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring and related costs	$ 4,900,000
Maximum | Employee-related | DSD Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring and related costs	2,700,000
Maximum | Other Restructuring | DSD Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring and related costs	$ 2,200,000
WCTPP [Member]
Restructuring Cost and Reserve [Line Items]
Withdrawal obligation			2,100,000		2,100,000
WCTPP [Member] | Employee-related | Corporate Relocation Plan
Restructuring Cost and Reserve [Line Items]
Multiemployer Plans, Withdrawal Obligation, Amount Paid			$ 1,300,000		$ 1,300,000