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Pension Benefits - Narrative (Details)
 3 Months Ended 12 Months Ended
Dec. 31, 2022
USD ($)
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2020
USD ($)
Mar. 31, 2023
USD ($)
$ / shares
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Oct. 31, 2022
USD ($)
Defined Benefit Plan Disclosure [Line Items]                
Percentage of eligible compensation (up to percent)         75.00%      
Contribution expenses         $ 125,000,000 $ 116,000,000 $ 102,000,000  
First Part Of Pay Contribution                
Defined Benefit Plan Disclosure [Line Items]                
Company match employee contributions (as a percent)         100.00%      
Employee contributions (as a percent)         3.00%      
Second Part Of Pay Contribution                
Defined Benefit Plan Disclosure [Line Items]                
Company match employee contributions (as a percent)         50.00%      
Employee contributions (as a percent)         2.00%      
Held-for-sale | E.U. Businesses (Disposal Group)                
Defined Benefit Plan Disclosure [Line Items]                
Pension assets     $ 3,024,000,000     3,024,000,000    
Held-for-sale | U.K. Businesses (Disposal Group)                
Defined Benefit Plan Disclosure [Line Items]                
Pension assets     1,482,000,000     1,482,000,000    
Held-for-sale | Austrian Business Operations                
Defined Benefit Plan Disclosure [Line Items]                
Accumulated other comprehensive gain (loss) derecognized     (11,000,000)   $ (17,000,000) (11,000,000)    
Held-for-sale | German Wholesale Business                
Defined Benefit Plan Disclosure [Line Items]                
Accumulated other comprehensive gain (loss) derecognized       $ (33,000,000)        
Pension liabilities derecognized       $ 187,000,000        
Disposal Group, Disposed of by Sale, Not Discontinued Operations | E.U. Businesses (Disposal Group)                
Defined Benefit Plan Disclosure [Line Items]                
Pension assets               $ 1,300,000,000
Disposal group, including discontinued operations, pension plan obligation derecognized $ 75,000,000              
Accumulated other comprehensive gain (loss) derecognized $ 13,000,000              
Disposal Group, Disposed of by Sale, Not Discontinued Operations | U.K. Businesses (Disposal Group)                
Defined Benefit Plan Disclosure [Line Items]                
Accumulated other comprehensive gain (loss) derecognized   $ 30,000,000            
Pension Plans, Defined Benefit                
Defined Benefit Plan Disclosure [Line Items]                
Unexpected actuarial losses (as a percent) (exceeding)         10.00%      
Expected benefit payments in 2024         $ 8,000,000      
Expected benefit payments in 2025         9,000,000      
Expected benefit payments in 2026         9,000,000      
Expected benefit payments in 2027         9,000,000      
Expected benefit payments in 2028         9,000,000      
Expected benefit payments in 2029 through 2033         50,000,000      
Expected contributions in next fiscal year         $ 3,000,000      
Unit value of cash and cash equivalents (in dollars per share) | $ / shares         $ 1.00      
Pension Plans, Defined Benefit | Held-for-sale | E.U. Businesses (Disposal Group)                
Defined Benefit Plan Disclosure [Line Items]                
Pension liabilities     85,000,000     85,000,000    
Pension Plans, Defined Benefit | Held-for-sale | U.K. Businesses (Disposal Group)                
Defined Benefit Plan Disclosure [Line Items]                
Pension assets     49,000,000     49,000,000    
Pension Plans, Defined Benefit | Held-for-sale | Austrian Business Operations                
Defined Benefit Plan Disclosure [Line Items]                
Pension liabilities derecognized     43,000,000     43,000,000    
Pension Plans, Defined Benefit | Disposal Group, Disposed of by Sale, Not Discontinued Operations | U.K. Businesses (Disposal Group)                
Defined Benefit Plan Disclosure [Line Items]                
Disposal group, including discontinued operations, pension plan assets derecognized   $ 49,000,000            
Other Postretirement Benefits Plan                
Defined Benefit Plan Disclosure [Line Items]                
Projected benefit obligation     $ 56,000,000   $ 45,000,000 56,000,000    
Net periodic pension expense         0 0 0  
UNITED STATES | Pension Plans, Defined Benefit | German Wholesale Business                
Defined Benefit Plan Disclosure [Line Items]                
Actuarial loss             $ 33,000,000  
Non-U.S. Plans | Pension Plans, Defined Benefit                
Defined Benefit Plan Disclosure [Line Items]                
Actuarial gain (loss)         65,000,000 55,000,000    
Actuarial loss resulting from discount rate changes         $ 69,000,000 $ 69,000,000    
Discount rates (percent)     2.67%   4.54% 2.67% 1.89%  
Actuarial gain (loss), demographic and assumption changes         $ (4,000,000) $ (14,000,000)    
Actuarial loss         9,000,000 14,000,000 $ 35,000,000  
Projected benefit obligation     $ 701,000,000   $ 172,000,000 701,000,000 875,000,000  
Increase (decrease) in basis points         0.0187      
Percentage of total plan contribution - exceeding (percent)         5.00%      
Amounts of plan exceeding total plan contribution         $ 19,000,000 20,000,000 22,000,000  
Funded status (as a percent)         85.00%      
Amounts accrued for liability         $ 0      
Net periodic pension expense         7,000,000 4,000,000 $ 19,000,000  
Non-U.S. Plans | Pension Plans, Defined Benefit | Norwegian Public Service Pension Fund (SPK)                
Defined Benefit Plan Disclosure [Line Items]                
Amount of plan asset value     35,000,000   30,000,000 35,000,000    
Non-U.S. Plans | Pension Plans, Defined Benefit | Unfunded plan                
Defined Benefit Plan Disclosure [Line Items]                
Projected benefit obligation     $ 101,000,000   $ 18,000,000 $ 101,000,000