v3.26.1
RETIREMENT PLANS - Schedule of Weighted-Average Asset Allocations for U.S Pension Plans and International Pension Plan (Details) - Pension Plan - USD ($)
$ in Millions
May 31, 2026
May 31, 2025
May 31, 2024
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 29,113 $ 27,245  
U.S. Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 28,453 $ 26,601 $ 25,797
Actual % 100.00% 100.00%  
U.S. Pension Plans | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 3,782 $ 4,352  
U.S. Pension Plans | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 10,427 9,768  
U.S. Pension Plans | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 1,142 1,083 1,075
U.S. Pension Plans | U.S. Large Cap Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 4,149 $ 3,804  
Actual % 15.00% 14.00%  
U.S. Pension Plans | U.S. Large Cap Equity | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 1,556 $ 1,678  
U.S. Pension Plans | U.S. Large Cap Equity | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | U.S. Large Cap Equity | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | International equities      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 2,908 $ 2,869  
Actual % 10.00% 11.00%  
U.S. Pension Plans | International equities | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 1,717 $ 1,994  
U.S. Pension Plans | International equities | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | International equities | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | Global equities      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 1,745 $ 1,224  
Actual % 6.00% 5.00%  
U.S. Pension Plans | Global equities | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 0 $ 0  
U.S. Pension Plans | Global equities | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | Global equities | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | U.S. SMID cap equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 528 $ 671  
Actual % 2.00% 2.00%  
U.S. Pension Plans | U.S. SMID cap equity | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 517 $ 662  
U.S. Pension Plans | U.S. SMID cap equity | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 11 9  
U.S. Pension Plans | U.S. SMID cap equity | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 7,013 $ 6,625  
Actual % 25.00% 25.00%  
U.S. Pension Plans | Corporate | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 0 $ 0  
U.S. Pension Plans | Corporate | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 7,013 6,625  
U.S. Pension Plans | Corporate | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | Government      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 4,327 $ 4,142  
Actual % 15.00% 16.00%  
U.S. Pension Plans | Government | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 0 $ 0  
U.S. Pension Plans | Government | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 2,240 2,277  
U.S. Pension Plans | Government | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | Mortgage-backed and other      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 1,691 $ 1,648  
Actual % 6.00% 6.00%  
U.S. Pension Plans | Mortgage-backed and other | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 0 $ 0  
U.S. Pension Plans | Mortgage-backed and other | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 230 229  
U.S. Pension Plans | Mortgage-backed and other | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
U.S. Pension Plans | Alternative investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 5,170 $ 4,972  
Actual % 18.00% 19.00%  
U.S. Pension Plans | Alternative investments | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Target Range % 20.00% 15.00%  
U.S. Pension Plans | Alternative investments | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Target Range % 30.00% 25.00%  
U.S. Pension Plans | Alternative investments | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 0 $ 0  
U.S. Pension Plans | Alternative investments | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 3 0  
U.S. Pension Plans | Alternative investments | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 1,142 1,083  
U.S. Pension Plans | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 226 $ 5  
Actual % 1.00% 0.00%  
U.S. Pension Plans | Other | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ (34) $ (16)  
U.S. Pension Plans | Other | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 260 21  
U.S. Pension Plans | Other | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 0 $ 0  
U.S. Pension Plans | Total Equities | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Target Range % 30.00% 25.00%  
U.S. Pension Plans | Total Equities | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Target Range % 35.00% 40.00%  
U.S. Pension Plans | Total Fixed Income Securities | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Target Range % 40.00% 40.00%  
U.S. Pension Plans | Total Fixed Income Securities | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Target Range % 60.00% 60.00%  
U.S. Pension Plans | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 696 $ 641  
Actual % 2.00% 2.00%  
U.S. Pension Plans | Cash and cash equivalents | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Target Range % 0.00% 0.00%  
U.S. Pension Plans | Cash and cash equivalents | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Target Range % 5.00% 5.00%  
U.S. Pension Plans | Cash and cash equivalents | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets $ 26 $ 34  
U.S. Pension Plans | Cash and cash equivalents | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 670 607  
U.S. Pension Plans | Cash and cash equivalents | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 0 0  
International Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair Value of
Plan Assets 660 644 $ 602
Portion of fair value of plan assets $ 344 $ 349  
Actual % 100.00% 100.00%  
International Pension Plans | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 135 $ 153  
International Pension Plans | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets 0 0  
International Pension Plans | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets 0 0  
International Pension Plans | Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 118 $ 118  
Actual % 34.00% 34.00%  
International Pension Plans | Corporate | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 0 $ 0  
International Pension Plans | Corporate | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets 0 0  
International Pension Plans | Corporate | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets 0 0  
International Pension Plans | Government      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 179 $ 184  
Actual % 52.00% 53.00%  
International Pension Plans | Government | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 121 $ 141  
International Pension Plans | Government | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets 0 0  
International Pension Plans | Government | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets 0 0  
International Pension Plans | Other      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 33 $ 35  
Actual % 10.00% 10.00%  
International Pension Plans | Other | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 0 $ 0  
International Pension Plans | Other | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets 0 0  
International Pension Plans | Other | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets 0 0  
International Pension Plans | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 14 $ 12  
Actual % 4.00% 3.00%  
International Pension Plans | Cash and cash equivalents | Quoted Prices in
Active Markets
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 14 $ 12  
International Pension Plans | Cash and cash equivalents | Other Observable
Inputs
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets 0 0  
International Pension Plans | Cash and cash equivalents | Unobservable
Inputs
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Portion of fair value of plan assets $ 0 $ 0