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Debt - Schedule of Outstanding Debt (Details) - USD ($)
$ in Millions
Nov. 01, 2025
Aug. 02, 2025
Jun. 30, 2025
Feb. 01, 2025
Debt Instrument [Line Items]        
Total borrowings $ 4,499.9     $ 4,090.5
Less: Unamortized debt discount and issuance cost (31.0)     (26.7)
Net carrying amount of debt 4,468.9     4,063.8
Non-current portion $ 3,969.4     $ 3,934.3
Short-term debt, weighted average interest rate 1.65%     5.785%
Term Loan        
Debt Instrument [Line Items]        
Total borrowings $ 0.0     $ 590.6
Less: Current portion 499.5     129.5
Term Loan | 2026 Term Loan - 5-Year Tranche        
Debt Instrument [Line Items]        
Total borrowings 0.0 $ 557.8   590.6
Senior Notes        
Debt Instrument [Line Items]        
Total borrowings 4,499.9     3,499.9
Net carrying amount of debt $ 1,000.0      
Senior Notes | 4.875% MTG/MTI 2028 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate (as a percent) 4.875%      
Total borrowings $ 499.9     499.9
Senior Notes | MTG 2028 Senior Notes        
Debt Instrument [Line Items]        
Effective interest rate (as a percent) 4.94%      
Senior Notes | MTI 2028 Senior Notes        
Debt Instrument [Line Items]        
Effective interest rate (as a percent) 4.988%      
Senior Notes | 1.650% 2026 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate (as a percent) 1.65%      
Effective interest rate (as a percent) 1.839%      
Total borrowings $ 500.0     500.0
Senior Notes | 2.450% 2028 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate (as a percent) 2.45%      
Effective interest rate (as a percent) 2.554%      
Total borrowings $ 750.0     750.0
Senior Notes | 5.750% 2029 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate (as a percent) 5.75%      
Effective interest rate (as a percent) 5.891%      
Total borrowings $ 500.0     500.0
Senior Notes | 4.750% 2030 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate (as a percent) 4.75%   4.75%  
Effective interest rate (as a percent) 4.88%   4.88%  
Total borrowings $ 500.0     0.0
Senior Notes | 2.950% 2031 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate (as a percent) 2.95%      
Effective interest rate (as a percent) 3.043%      
Total borrowings $ 750.0     750.0
Senior Notes | 5.950% 2033 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate (as a percent) 5.95%      
Effective interest rate (as a percent) 6.082%      
Total borrowings $ 500.0     500.0
Senior Notes | 5.450% 2035 Senior Notes        
Debt Instrument [Line Items]        
Stated interest rate (as a percent) 5.45%   5.45%  
Effective interest rate (as a percent) 5.531%   5.531%  
Total borrowings $ 500.0     $ 0.0