Long-Term Debt (Tables)

9 Months Ended

Jun. 30, 2021

Debt Disclosure [Abstract]

Long-term Debt

	June 30, 2021		September 30, 2020
4.50% Senior Notes maturing September 2031	$	1,800.0	$	—
4.625% Senior Notes maturing April 2030	1,650.0		1,650.0
5.50% Senior Notes maturing December 2029	750.0		750.0
5.625% Senior Notes maturing January 2028	940.9		940.9
5.75% Senior Notes maturing March 2027	1,299.3		1,299.3
5.00% Senior Notes maturing August 2026	—		1,697.3
BellRing Term B Facility	618.7		673.7
BellRing Revolving Credit Facility	—		30.0
Municipal bond	7.5		8.5
	$	7,066.4	$	7,049.7
Less: Current portion of long-term debt	115.6		64.9
Debt issuance costs, net	53.9		62.6
Plus: Unamortized premium and discount, net	35.2		36.8
Total long-term debt	$	6,932.1	$	6,959.0

Repayments of Long-term Debt

Three Months Ended June 30,	Repayments of Long-Term Debt			Loss on Extinguishment and Refinancing of Debt, net
	Issuance or Borrowing	Principal Amount Repaid		Debt Premiums and Refinancing Fees Paid		Write-off of Debt Issuance Costs and Deferred Financing Fees
	BellRing Term B Facility	$	8.7	$	—	$	—
	BellRing Credit Agreement (a)	—		0.1		—
2021	Total	$	8.7	$	0.1	$	—
	Revolving Credit Facility	$	325.0	$	—	$	—
	BellRing Revolving Credit Facility	65.0		—		—
	BellRing Term B Facility	8.8		—		—
2020	Total	$	398.8	$	—	$	—

Nine Months Ended June 30,	Repayments of Long-Term Debt			Loss on Extinguishment and Refinancing of Debt, net
	Issuance or Borrowing	Principal Amount Repaid		Debt Premiums and Refinancing Fees Paid		Write-off of Debt Issuance Costs and Deferred Financing Fees
	5.00% Senior Notes	$	1,697.3	$	74.3	$	18.9
	BellRing Revolving Credit Facility	50.0		—		—
	BellRing Term B Facility	55.0		—		—
	Municipal bond	1.0		—		—
	BellRing Credit Agreement (a)	—		1.6		—
2021	Total	$	1,803.3	$	75.9	$	18.9
	Term loan	$	1,309.5	$	—	$	9.1
	Bridge loan	1,225.0		—		3.8
	5.50% Senior Notes maturing in March 2025	1,000.0		41.3		8.7
	Revolving Credit Facility	325.0		—		—
	8.00% Senior Notes	122.2		8.5		0.7
	BellRing Revolving Credit Facility	130.0		—		—
	BellRing Term B Facility	17.5		—		—
	Municipal bond	1.1		—		—
	Credit Agreement (b)	—		—		0.8
2020	Total	$	4,130.3	$	49.8	$	23.1

(a)In connection with the BellRing Amendment discussed above, BellRing paid refinancing fees.

(b)In connection with the amendment and restatement of the Credit Agreement in March 2020, the Company recorded a write-off of deferred financing fees.