v3.26.1
Borrowings - Additional Information (Detail)
£ in Millions
6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2026
GBP (£)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Debt Instrument [Line Items]        
Line of credit facility, covenant terms The 2026 Credit Facility requires the Company not to exceed a maximum consolidated leverage ratio (ratio of net debt to earnings before interest, taxes, depreciation and amortization, where net debt equals total debt less unrestricted cash) of 3.5 to 1      
Borrowings $ 12,744,000,000     $ 12,768,000,000
Fair Value 12,343,000,000     $ 12,500,000,000
Aggregate principal amount 12,843,000,000      
Minimum [Member]        
Debt Instrument [Line Items]        
Unsecured revolving credit facility     $ 400,000,000  
Maximum [Member]        
Debt Instrument [Line Items]        
Unsecured revolving credit facility     $ 6,300,000,000  
Commercial Paper [Member]        
Debt Instrument [Line Items]        
Maximum amount available under facility 5,000,000,000      
Amount outstanding under credit facility 0      
2026 Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Additional amount available, subject to lender credit approval 1,400,000,000      
Maximum amount available under facility 7,700,000,000      
Amount outstanding under credit facility $ 0      
Line of credit facility, covenant compliance less than 1 to 1      
Maximum leverage ratio required by credit facility 3.5 to 1      
2026 Subsidiary Credit Facility [Member] | Subsidiaries [Member]        
Debt Instrument [Line Items]        
Maximum amount available under facility $ 33,000,000 £ 25    
Aggregate principal amount $ 0