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Retirement Benefits and Postemployment Benefits (Tables)

12 Months Ended

May 30, 2021

Retirement Benefits and Postemployment Benefits [Abstract]

Health Care Cost Trend Rates [Table Text Block]

	Fiscal Year
	2021			2020
Health care cost trend rate for next year	6.0% and 6.3%			6.2% and 6.5%
Rate to which the cost trend rate is assumed to decline (ultimate rate)	4.5	%		4.5	%
Year that the rate reaches the ultimate trend rate	2029			2029

Summarized Financial Information [Table Text Block]

		Defined Benefit Pension Plans						Other Postretirement Benefit Plans						Postemployment Benefit Plans
		Fiscal Year						Fiscal Year						Fiscal Year
In Millions		2021			2020			2021			2020			2021			2020
Change in Plan Assets:
Fair value at beginning of year	$	6,993.2		$	6,291.6		$	793.5		$	753.8
Actual return on assets		716.3			983.7			108.1			65.0
Employer contributions		33.8			32.9			(359.9)			0.1
Plan participant contributions		4.1			6.7			13.0			13.8
Benefits payments		(315.1)			(317.2)			(35.3)			(39.2)
Foreign currency		27.9			(4.5)			-			-
Fair value at end of year (a)	$	7,460.2		$	6,993.2		$	519.4		$	793.5
Change in Projected Benefit Obligation:
Benefit obligation at beginning of year	$	7,640.2		$	6,750.7		$	773.7		$	824.1		$	150.3		$	128.0
Service cost		104.4			92.7			8.5			9.4			9.3			8.3
Interest cost		192.1			230.5			18.0			27.1			1.7			2.6
Plan amendment		1.1			1.2			(138.7)			-			-			-
Curtailment/other		(5.8)			(1.2)			-			-			5.1			-
Plan participant contributions		4.1			6.7			13.0			13.8			-			-
Medicare Part D reimbursements		-			-			2.5			2.7			-			-
Actuarial loss (gain)		67.4			881.8			(15.8)			(38.3)			7.2			17.7
Benefits payments		(315.7)			(317.7)			(61.9)			(63.5)			(22.5)			(6.2)
Foreign currency		26.6			(4.5)			0.7			(1.6)			0.6			(0.1)
Projected benefit obligation at end of year (a)	$	7,714.4		$	7,640.2		$	600.0		$	773.7		$	151.7		$	150.3
Plan assets less than benefit obligation as of fiscal year end	$	(254.2)		$	(647.0)		$	(80.6)		$	19.8		$	(151.7)		$	(150.3)

(a)Plan assets and obligations are measured as of May 31, 2021 and May 31, 2020.

Amounts Recognized in AOCI [Table Text Block]

	Defined Benefit Pension Plans						Other Postretirement Benefit Plans						Postemployment Benefit Plans						Total
	Fiscal Year						Fiscal Year						Fiscal Year						Fiscal Year
In Millions		2021			2020			2021			2020			2021			2020			2021			2020
Net actuarial (loss) gain	$	(1,897.2)		$	(2,136.6)		$	200.8		$	129.5		$	(22.0)		$	(15.4)		$	(1,718.4)		$	(2,022.5)
Prior service (costs) credits		5.8			(6.0)			133.7			21.0			(1.6)			(5.3)			137.9			9.7
Amounts recorded in accumulated other comprehensive loss	$	(1,891.4)		$	(2,142.6)		$	334.5		$	150.5		$	(23.6)		$	(20.7)		$	(1,580.5)		$	(2,012.8)

Accumulated Benefit Obligations in Excess of Plan Assets [Table Text Block]

		Defined Benefit Pension Plans
		Fiscal Year
In Millions		2021			2020
Projected benefit obligation	$	615.3		$	3,512.9
Accumulated benefit obligation		556.2			3,200.1
Plan assets at fair value		26.7			2,569.9

Components of Net Periodic Benefit Expense [Table Text Block]

	Defined Benefit Pension Plans							Other Postretirement Benefit Plans							Postemployment Benefit Plans
	Fiscal Year								Fiscal Year							Fiscal Year
In Millions		2021		2020		2019			2021		2020		2019			2021		2020		2019
Service cost	$	104.4	$	92.7	$	94.6		$	8.5	$	9.4	$	9.9		$	9.3	$	8.3	$	7.6
Interest cost		192.1		230.5		248.0			18.0		27.1		33.1			1.7		2.6		3.0
Expected return on plan assets		(420.9)		(449.9)		(445.8)			(34.7)		(42.1)		(40.4)			-		-		-
Amortization of losses (gains)		108.3		106.0		109.8			(5.1)		(2.1)		0.6			2.6		0.4		0.1
Amortization of prior service costs (credits)		1.3		1.6		1.5			(5.5)		(5.5)		(5.5)			0.9		0.9		0.7
Other adjustments		-		-		-			-		-		-			8.4		17.7		6.7
Settlement or curtailment losses		14.9		-		0.3			-		-		-			-		-		-
Net expense (income)	$	0.1	$	(19.1)	$	8.4		$	(18.8)	$	(13.2)	$	(2.3)		$	22.9	$	29.9	$	18.1

Weighted-Average Assumptions [Table Text Block]

	Defined Benefit Pension Plans					Other Postretirement Benefit Plans					Postemployment Benefit Plans
	Fiscal Year					Fiscal Year					Fiscal Year
	2021		2020			2021		2020			2021		2020
Discount rate	3.17	%	3.20	%		3.03	%	3.02	%		2.04	%	1.85	%
Rate of salary increases	4.39		4.44			-		-			4.46		4.51

	Defined Benefit Pension Plans							Other Postretirement Benefit Plans							Postemployment Benefit Plans
	Fiscal Year							Fiscal Year							Fiscal Year
	2021		2020		2019			2021		2020		2019			2021		2020		2019
Discount rate	3.20	%	3.91	%	4.20	%		3.02	%	3.79	%	4.17	%		1.86	%	3.10	%	3.60	%
Service cost effective rate	3.58		4.19		4.34			3.40		4.04		4.27			3.51		3.51		3.99
Interest cost effective rate	2.55		3.47		3.92			2.29		3.28		3.80			2.83		2.84		3.37
Rate of salary increases	4.44		4.17		4.27			-		-		-			4.47		4.47		4.44
Expected long-term rate of return on plan assets	5.72		6.95		7.25			4.57		5.67		5.67			-		-		-

Schedule of Allocation of Plan Assets, Including Fair Value Hierarchy Levels and Weighted-Average Target Asset Allocations [Table Text Block]

	May 31, 2021									May 31, 2020
In Millions		Level 1		Level 2		Level 3		Total Assets			Level 1		Level 2		Level 3		Total Assets
Fair value measurement of pension plan assets:
Equity (a)	$	838.3	$	697.2	$	-	$	1,535.5		$	1,039.6	$	777.7	$	-	$	1,817.3
Fixed income (b)		1,993.5		1,936.3		-		3,929.8			1,833.3		1,667.4		-		3,500.7
Real asset investments (c)		277.9		0.2		-		278.1			223.4		0.1		-		223.5
Other investments (d)		-		-		0.1		0.1			-		-		0.2		0.2
Cash and accruals		180.0		-		-		180.0			180.3		-		-		180.3
Fair value measurement of pension plan assets	$	3,289.7	$	2,633.7	$	0.1	$	5,923.5		$	3,276.6	$	2,445.2	$	0.2	$	5,722.0
Assets measured at net asset value (e)								1,536.7									1,271.2
Total pension plan assets							$	7,460.2								$	6,993.2
Fair value measurement of postretirement benefit plan assets:
Equity (a)	$	0.2	$	-	$	-	$	0.2		$	-	$	46.9	$	-	$	46.9
Fixed income (b)		117.3		-		-		117.3			157.5		268.4		-		425.9
Real asset investments (c)		-		-		-		-			0.1		-		-		0.1
Cash and accruals		14.8		-		-		14.8			16.7		-		-		16.7
Fair value measurement of postretirement benefit plan assets	$	132.3	$	-	$	-	$	132.3		$	174.3	$	315.3	$	-	$	489.6
Assets measured at net asset value (e)								387.1									303.9
Total postretirement benefit plan assets							$	519.4								$	793.5

(a)Primarily publicly traded common stock for purposes of total return and to maintain equity exposure consistent with policy allocations. Investments include: United States and international equity securities, mutual funds, and equity futures valued at closing prices from national exchanges, and commingled funds valued at unit values provided by the investment managers, which are based on the fair value of the underlying investments.

(b)Primarily government and corporate debt securities and futures for purposes of total return, managing fixed income exposure to policy allocations, and duration targets. Investments include: fixed income securities and bond futures generally valued at closing prices from national exchanges, fixed income pricing models, and independent financial analysts; and fixed income commingled funds valued at unit values provided by the investment managers, which are based on the fair value of the underlying investments.

(c)Publicly traded common stocks in energy, real estate, and infrastructure for the purpose of total return. Investments include: energy, real estate, and infrastructure securities generally valued at closing prices from national exchanges, and commingled funds valued at unit values provided by the investment managers, which are based on the fair value of the underlying investments.

(d)Insurance and annuity contracts to provide a stable stream of income for pension retirees. Fair values are based on the fair value of the underlying investments and contract fair values established by the providers.

(e)Primarily private investments and common collective trusts that are measured at fair value using the net asset value per share (or its equivalent) practical expedient and have not been classified in the fair value hierarchy.

	Defined Benefit Pension Plans					Other Postretirement Benefit Plans
	Fiscal Year					Fiscal Year
	2021		2020			2021		2020
Asset category:
United States equities	15.4	%	19.7	%		28.0	%	18.1	%
International equities	9.9		11.0			13.9		9.8
Private equities	9.3		6.2			15.1		4.4
Fixed income	54.6		52.8			43.0		64.8
Real assets	10.8		10.3			-		2.9
Total	100.0	%	100.0	%		100.0	%	100.0	%

Estimated Benefit Payments [Table Text Block]

In Millions	Defined Benefit Pension Plans			Other Postretirement Benefit Plans Gross Payments			Medicare Subsidy Receipts			Postemployment Benefit Plans
Fiscal 2022	$	332.6		$	40.2		$	1.9		$	29.0
Fiscal 2023		339.6			36.6			-			21.0
Fiscal 2024		347.1			36.9			-			19.3
Fiscal 2025		355.7			37.3			-			17.8
Fiscal 2026		364.5			37.7			-			16.5
Fiscal 2027-2031		1,944.0			168.0			-			66.8

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