v3.26.1
Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($)
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Income Tax Disclosure [Abstract]      
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount $ 457,000,000    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00% 21.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount $ 75,000,000    
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent 3.50% 4.00% 3.10%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount $ 5,000,000    
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent 0.20% 0.20% (1.60%)
Effective Income Tax Rate Reconciliation, FDDEI, Amount $ (156,000,000)    
Effective Income Tax Rate Reconciliation, FDDEI, Percent (7.10%)    
Effective Income Tax Rate Reconciliation, Cross-Border, Other, Amount $ 1,000,000    
Effective Income Tax Rate Reconciliation, Cross-Border, Other, Percent 0.00%    
Effective Income Tax Rate Reconciliation, Tax Credit, Amount $ (18,000,000)    
Effective Income Tax Rate Reconciliation, Tax Credit, Percent (0.80%)    
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount $ 24,000,000    
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent 1.10% 0.10% (1.10%)
Effective Tax Rate Reconciliation, Specialty Alliance Share-based Compensation, Amount $ 50,000,000    
Effective Tax Rate Reconcillation Specialty Alliance Share-based Compensation, Percent 2.30% 1.40% 0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount $ 20,000,000    
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent 0.90% 0.70% (0.10%)
Effective Income Tax Rate Reconciliation, Tax Contingency, Amount $ 11,000,000    
Effective Income Tax Rate Reconciliation, Tax Contingency, Percent 0.50%    
Income Tax Expense (Benefit) $ 469,000,000 $ 532,000,000 $ 348,000,000
Effective Income Tax Rate Reconciliation, Percent, Total 21.60% 25.30% 28.90%
Effective Income Tax Rate Reconciliation, Withholding Taxes   0.30% 1.00%
Effective Income Tax Rate Reconciliation, US Taxes on International Income   (1.30%) (2.10%)
Effective Tax Rate Reconciliation, Impact of Resolutions with IRS and other related matters   (0.10%) 0.40%
Effective Income Tax Reconciliation, Opioid Litigation   0.20% 1.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent   0.00% 8.70%
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent   (1.20%) (1.40%)