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Borrowings - Additional Information (Detail)
£ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2024
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
GBP (£)
May 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Debt Instrument [Line Items]            
Aggregate principal amount   $ 9,950,000,000        
Line of credit facility, covenant terms   The 2024 credit facility permits the Company to request up to an additional $1.0 billion of borrowing capacity, subject to lender credit approval, which could increase the overall size of the 2024 credit facility to an aggregate principal amount of up to $6.4 billion. Interest on outstanding borrowings accrues at an applicable benchmark rate for the denominated currency of the loan, plus a spread. The 2024 credit facility requires the Company not to exceed a maximum 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 to 1        
Borrowings   $ 9,857,000,000       $ 7,918,000,000
Fair Value   9,215,000,000       $ 7,400,000,000
Repayments of long-term borrowings   1,000,000,000 $ 0      
Commercial Paper [Member]            
Debt Instrument [Line Items]            
Maximum amount available under facility   4,000,000,000        
Amount outstanding under credit facility   0        
2024 Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Unsecured revolving credit facility   5,400,000,000     $ 400,000,000  
Additional amount available, subject to lender credit approval   1,000,000,000        
Maximum amount available under facility   $ 6,400,000,000        
Line of credit facility, interest rate description   Interest on outstanding borrowings accrues at an applicable benchmark rate for the denominated currency of the loan, plus a spread.        
Amount outstanding under credit facility   $ 0        
Line of credit facility, covenant compliance   less than 1 to 1        
2024 Subsidiary Credit Facility [Member] | Subsidiaries [Member]            
Debt Instrument [Line Items]            
Maximum amount available under facility   $ 32,000,000   £ 25    
Amount outstanding under credit facility   0        
March 2024 Notes            
Debt Instrument [Line Items]            
Aggregate principal amount   3,000,000        
Debt instrument, Approximate annual interest expense   $ 152,000,000        
Debt instrument, payment terms   Interest on the March 2024 Notes of approximately $152 million per year is payable semi-annually on March 14 and September 14 of each year, beginning September 14, 2024.        
Unsecured Debt Two Thousand Twenty Nine And Two Thousand Thirty Four Notes [Member]            
Debt Instrument [Line Items]            
Debt Instrument, redemption price, percentage of principal amount redeemed   101.00%        
4.70% Notes due 2029 [Member]            
Debt Instrument [Line Items]            
Aggregate principal amount   $ 500,000,000        
Debt instrument, interest rate   4.70%   4.70%    
Debt instrument, maturity date   Mar. 14, 2029        
Borrowings   $ 496,000,000        
Fair Value   497,000,000        
5.00% Notes due 2034 [Member]            
Debt Instrument [Line Items]            
Aggregate principal amount   $ 1,000,000,000        
Debt instrument, interest rate   5.00%   5.00%    
Debt instrument, maturity date   Mar. 14, 2034        
Borrowings   $ 992,000,000        
Fair Value   989,000,000        
5.25% Notes due 2054 [Member]            
Debt Instrument [Line Items]            
Aggregate principal amount   $ 1,500,000,000        
Debt instrument, interest rate   5.25%   5.25%    
Debt instrument, maturity date   Mar. 14, 2054        
Borrowings   $ 1,468,000,000        
Fair Value   $ 1,449,000,000        
3.50% Notes due 2024 [Member]            
Debt Instrument [Line Items]            
Debt instrument, interest rate 3.50%          
Repayments of long-term borrowings $ 1,000,000