Stock-Based Compensation (Tables)

12 Months Ended

Sep. 30, 2022

PHI Stock Options

Share-based Payment Award [Line Items]

Stock options, activity

in millions, except options or where otherwise indicated	Post Stock Options	Weighted- Average Exercise Price Per  Share (a)		Weighted- Average Remaining Contractual Term in Years	Aggregate Intrinsic Value
Outstanding at September 30, 2021	38,314	$	81.42
Granted	—	—
Impact of Spin-off	18,498	54.91
Exercised	—	—
Forfeited	—	—
Expired	—	—
Outstanding at September 30, 2022	56,812	54.91		5.21	$	1.5
Vested and expected to vest as of September 30, 2022	56,812	54.91		5.21	1.5
Exercisable at September 30, 2022	56,812	54.91		5.21	1.5

(a)The weighted-average exercise price per share for activity subsequent to the Spin-off, including the outstanding balance as of September 30, 2022, reflects the adjustment to preserve the intrinsic value of the Post Equity Awards outstanding immediately prior to the Spin-off.

PHI Stock-Settled Restricted Stock Unit

Share-based Payment Award [Line Items]

Restricted stock units, activity

	Post RSUs	Weighted- Average Grant Date Fair Value Per  Share (a)
Nonvested at September 30, 2021	21,116	$	104.26
Granted	—	—
Impact of Spin-off	5,592	n/a
Vested	(26,708)	82.42
Forfeited	—	—
Nonvested at September 30, 2022	—	—

(a)The weighted-average grant date fair value for the activity subsequent to the Spin-off, including the nonvested balance as of September 30, 2022, reflects the adjustment to preserve the intrinsic value of the Post Equity Awards outstanding immediately prior to the Spin-off.

PHI Cash-Settled Restricted Stock Unit

Share-based Payment Award [Line Items]

Restricted stock units, activity

	Post Cash RSUs	Weighted- Average Grant Date Fair Value Per Share (a)
Nonvested at September 30, 2021	3,000	$	51.43
Granted	—	—
Impact of Spin-off	1,448	n/a
Vested	(1,482)	34.68
Forfeited	—	—
Nonvested at September 30, 2022	2,966	34.68

(a)The weighted-average grant date fair value for the activity subsequent to the Spin-off, including the nonvested balance as of September 30, 2022, reflects the adjustment to preserve the intrinsic value of the Post Equity Awards outstanding immediately prior to the Spin-off.

BRBR Stock Options

Share-based Payment Award [Line Items]

Stock options, activity

in millions, except options or where otherwise indicated	BellRing Stock Options	Weighted- Average Exercise Price Per Share (a)		Weighted- Average Remaining Contractual Term in Years	Aggregate Intrinsic Value
Outstanding at September 30, 2021	258,969	$	19.78
Granted	—	—
Impact of Spin-off	27,074	17.74
Exercised	(27,056)	19.50
Forfeited	—	—
Expired	—	—
Outstanding at September 30, 2022	258,987	17.74		7.80	$	0.7
Vested and expected to vest as of September 30, 2022	258,987	17.74		7.80	0.7
Exercisable at September 30, 2022	91,266	17.63		7.65	0.3

(a)The weighted-average exercise price per share for activity subsequent to the Spin-off, including the outstanding balance as of September 30, 2022, reflects the adjustment to preserve the intrinsic value of the BellRing Equity Awards outstanding immediately prior to the Spin-off.

Stock options, valuation assumptions

	September 30,
	2021	2020
Expected term (in years)	6.5	6.5
Expected stock price volatility	38.5%	38.5%
Risk-free interest rate	0.6%	1.6%
Expected dividends	—%	—%
Fair value (per option)	$7.79	$7.92

The total intrinsic value of stock options exercised was $0.1 in the year ended September 30, 2022, and the Company received proceeds from the exercise of stock options of $0.5 during the year ended September 30, 2022. There were no stock options exercised during the years ended September 30 2021 or 2020.

BRBR Stock-Settled Restricted Stock Units

Share-based Payment Award [Line Items]

Restricted stock units, activity

	BellRing RSUs	Weighted- Average Grant Date Fair Value Per  Share (a)
Nonvested at September 30, 2021	467,663	$	19.85
Granted	318,462	25.87
Impact of Spin-off	56,106	n/a
Vested	(209,790)	20.01
Forfeited	(52,472)	20.59
Nonvested at September 30, 2022	579,969	21.23

(a)The weighted-average grant date fair value for the activity subsequent to the Spin-off, including the nonvested balance as of September 30, 2022, reflects the adjustment to preserve the intrinsic value of the BellRing Equity Awards outstanding immediately prior to the Spin-off.

BRBR Performance-Based Restricted Stock Units

Share-based Payment Award [Line Items]

Share-Based Compensation Arrangements by Share-Based Payment Award, Performance-Based Units, Vested and Expected to Vest

	BellRing PRSUs	Weighted- Average Grant Date Fair Value Per  Share (a)
Nonvested at September 30, 2021	—	$	—
Granted	367,357	42.33
Impact of Spin-off	7,862	n/a
Vested	—	—
Forfeited	—	—
Nonvested at September 30, 2022	375,219	41.44

(a)The weighted-average grant date fair value for the activity subsequent to the Spin-off, including the nonvested balance as of September 30, 2022, reflects the adjustment to preserve the intrinsic value of the BellRing Equity Awards outstanding immediately prior to the Spin-off.

Schedule of Share-based Payment award, Non-Options, Valuation Assumptions

Expected term (in years)	2.9
Expected stock price volatility	49.6%
Risk-free interest rate	2.3%
Expected dividends	—%
Fair value (per BellRing PRSU)	$42.33