Stock-Based Compensation Plans (Tables)

12 Months Ended

May 31, 2024

Stock Options [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Weighted-Average Assumptions

The weighted-average assumptions used for valuation under the Black-Scholes option pricing model are as follows:

	Year ended May 31,
	2024			2023			2022
Risk-free interest rate		4.1	%		3.2	%		1.2	%
Dividend yield		3.1	%		2.6	%		2.9	%
Volatility factor		0.25			0.27			0.23
Expected option life in years		6.6			6.6			6.6
Weighted-average grant-date   fair value of stock options granted (per share)	$	27.21		$	27.58		$	17.47

Stock Option Activity

The following table summarizes stock option activity for fiscal 2024:

						Weighted-
				Weighted-		average
	Shares			average		remaining		Aggregate
	subject			exercise price		contractual		intrinsic
In millions, except per share amounts	to options			per share		term (years)		value(1)
Outstanding as of May 31, 2023		3.3		$	74.09
Granted		0.4		$	120.76
Exercised		(0.6	)	$	63.49
Forfeited		(0.1	)	$	118.35
Outstanding as of May 31, 2024		3.0		$	80.09		5.0	$	119.1
Exercisable as of May 31, 2024		2.5		$	72.45		4.3	$	117.6

(1)Total shares valued at the market price of the underlying stock as of May 31, 2024 less the exercise price.

Other Information Pertaining to Stock Option

Other information pertaining to stock option grants is as follows:

	Year ended May 31,
In millions	2024		2023		2022
Total intrinsic value of stock options exercised	$	35.1	$	10.3	$	44.3
Total grant-date fair value of stock options vested	$	7.5	$	7.1	$	6.4

Time Based And Performance Based Restricted Stock Units [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

RSU Activity

The following table summarizes RSU activity for fiscal 2024:

				Weighted-					Weighted-
				average					average
	Time-			grant-date		Performance-			grant-date
	based			fair value		based			fair value
In millions, except per share amounts	RSUs			per share		RSUs			per share
Nonvested as of May 31, 2023		1.4		$	102.13		0.1		$	107.88
Granted (1)		0.5		$	114.95		0.2		$	114.23
Vested		(0.5	)	$	90.99		(0.0	)	$	107.40
Forfeited		(0.1	)	$	109.02		(0.0	)	$	112.01
Nonvested as of May 31, 2024		1.3		$	110.51		0.3		$	110.26

(1)For performance-based RSUs, granted number assumes achievement of performance goals at target. Actual number of shares to be earned may differ from this amount.

Other Information Pertaining to RSUs

Other information pertaining to RSUs is as follows:

	Year ended May 31,
In millions, except per share amounts	2024		2023		2022
Time-based RSUs:
Weighted-average grant-date fair value per share of RSUs granted	$	114.95	$	127.75	$	109.81
Weighted-average remaining vesting period (years)(1)		1.4		1.5		1.5
Total intrinsic value of RSUs vested	$	55.9	$	58.2	$	54.7
Aggregate intrinsic value of nonvested RSUs(2)	$	152.5	$	141.8	$	165.2
Total grant-date fair value of RSUs vested	$	41.2	$	32.7	$	30.0
Performance-based RSUs:
Weighted-average grant-date fair value per share of RSUs granted	$	114.23	$	108.31	$	103.59
Weighted-average remaining vesting period (years)(1)		1.1		1.8		1.0
Total intrinsic value of RSUs vested	$	0.4	$	7.8	$	—
Aggregate intrinsic value of nonvested RSUs(2)	$	30.8	$	15.7	$	14.7
Total grant-date fair value of RSUs vested	$	0.4	$	5.4	$	—

(1)Weighting is based on the number of unvested share units vesting in each future vesting tranche.

(2)Based on the market price of the underlying common stock as of May 31, 2024, 2023 and 2022.

Time-Based And Performance-Based Restricted Stock Awards [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Restricted Stock Awards Activity

The following table summarizes RSA activity for fiscal 2024:

				Weighted-					Weighted-
				average					average
				grant-date		Performance-			grant-date
	Time-based			fair value		based			fair value
In millions, except per share amounts	RSAs			per share		RSAs			per share
Nonvested as of May 31, 2023		0.1		$	95.10		0.1		$	107.40
Vested		(0.1	)	$	88.11		—		$	—
Forfeited		(0.0	)	$	114.15		(0.0	)	$	107.40
Nonvested as of May 31, 2024		0.0		$	114.22		0.1		$	107.40

No RSAs were granted during fiscal 2024 or fiscal 2023.

Other Information Pertaining to Restricted Stock Awards

Other information pertaining to RSAs is as follows:

	Year ended May 31,
In millions, except per share amounts	2024		2023		2022
Weighted-average grant-date fair value per share of time-based RSAs granted	$	—	$	—	$	114.21
Total grant-date fair value of time-based RSAs vested	$	3.1	$	4.3	$	3.8
Weighted-average grant-date fair value per share of performance-based RSAs    granted	$	—	$	—	$	103.97
Total grant-date fair value of performance-based restricted RSAs vested	$	—	$	3.7	$	7.2

LTIP Performance-Based Stock Options [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Stock Option Activity

The following table summarizes LTIP performance-based stock option activity for fiscal 2024:

						Weighted-
				Weighted-		average
	Shares			average		remaining		Aggregate
	subject			exercise price		contractual		intrinsic
In millions, except per share amounts	to options			per share		term (years)		value(1)
Outstanding as of May 31, 2023		0.4		$	60.51
Exercised		(0.1	)	$	58.98
Outstanding as of May 31, 2024		0.3		$	60.86		2.1	$	20.9
Exercisable as of May 31, 2024		0.3		$	60.86		2.1	$	20.9

(1)Shares valued at the market price of the underlying stock as of May 31, 2024 less the exercise price.

Other Information Pertaining to Stock Option

Other information pertaining to LTIP performance-based stock options is as follows:

	Year ended May 31,
In millions	2024		2023		2022
Total intrinsic value of stock options exercised	$	5.2	$	0.7	$	16.0