Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets		$ 13.8		$ 11.5
Derivative assets		8.3		3.0
Assets, Fair Value Disclosure		22.1		14.5
Deferred compensation liabilities		19.9		17.3
Derivative Liability		219.0		318.7
Other Liabilities, Fair Value Disclosure		238.9		336.0
(Losses) Gain on assets held for sale	$ (1.1)	0.2	$ (9.5)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets		13.8		11.5
Derivative assets		0.0		0.0
Assets, Fair Value Disclosure		13.8		11.5
Deferred compensation liabilities		0.0		0.0
Derivative Liability		0.0		0.0
Other Liabilities, Fair Value Disclosure		0.0		0.0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets		0.0		0.0
Derivative assets		8.3		3.0
Assets, Fair Value Disclosure		8.3		3.0
Deferred compensation liabilities		19.9		17.3
Derivative Liability		219.0		318.7
Other Liabilities, Fair Value Disclosure		238.9		336.0
Long-term Debt, Fair Value		6,577.3		4,852.2
Level 2 | Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term Debt, Fair Value		4,374.7		4,835.9
Level 2 | Term Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term Debt, Fair Value		2,201.7		0.0
Level 2 | TEUs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term Debt, Fair Value		0.0		15.0
Level 2 | Secured Debt, Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term Debt, Fair Value		0.7		1.3
Level 2 | Capital Lease Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term Debt, Fair Value		0.2		0.0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Carrying value of assets held for sale		0.0		10.1
(Losses) Gain on assets held for sale		0.2
Cash received from assets held for sale		$ (10.3)
Level 3 | Modesto, California facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Carrying value of assets held for sale				4.3
Level 3 | Farmers Branch, Texas facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Carrying value of assets held for sale				$ 5.8