v3.26.1
Debt - Summary of Debt (Detail) - USD ($)
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
May 31, 2023
Mar. 31, 2022
Mar. 31, 2020
Oct. 31, 2018
Mar. 31, 2018
Apr. 30, 2017
Aug. 31, 2016
Jan. 31, 2015
Apr. 30, 2014
Nov. 30, 2002
Mar. 31, 1999
Debt Instrument [Line Items]                              
Debt [1] $ 8,387,000,000   $ 6,897,000,000 $ 6,895,000,000                      
Fair value 7,758,000,000   6,345,000,000 6,294,000,000                      
Long-term debt, current maturities     0 0                      
Senior Notes 2.45% Due 2027                              
Debt Instrument [Line Items]                              
Debt, face amount                     $ 500,000,000        
Debt, stated interest rate                     2.45%        
Long-term debt     499,000,000 499,000,000                      
Fair value 495,000,000   493,000,000 488,000,000                      
Long-term debt, current maturities 500,000,000                            
Senior Notes 2.50% Due 2027                              
Debt Instrument [Line Items]                              
Debt, face amount           $ 500,000,000                  
Debt, stated interest rate           2.50%                  
Long-term debt     499,000,000 499,000,000                      
Fair value 493,000,000   492,000,000 487,000,000                      
Long-term debt, current maturities 500,000,000                            
Senior Notes 6.625% Due 2029                              
Debt Instrument [Line Items]                              
Debt, face amount                             $ 300,000,000
Debt, stated interest rate                             6.625%
Long-term debt 299,000,000   299,000,000 298,000,000                      
Fair value 316,000,000   323,000,000 324,000,000                      
Senior Notes 4.00% Due 2029                              
Debt Instrument [Line Items]                              
Debt, face amount               $ 550,000,000              
Debt, stated interest rate               4.00%              
Long-term debt 548,000,000   548,000,000 548,000,000                      
Fair value 544,000,000   551,000,000 547,000,000                      
Senior Notes 3.20% Due 2030                              
Debt Instrument [Line Items]                              
Debt, face amount             $ 500,000,000                
Debt, stated interest rate             3.20%                
Long-term debt 498,000,000   498,000,000 498,000,000                      
Fair value 477,000,000   484,000,000 477,000,000                      
Senior Notes 4.60% Due 2031                              
Debt Instrument [Line Items]                              
Debt, face amount   $ 500,000,000                          
Debt, stated interest rate   4.60%                          
Long-term debt 497,000,000   0 0                      
Fair value 498,000,000   0 0                      
Senior Notes 3.00% Due 2032                              
Debt Instrument [Line Items]                              
Debt, face amount           $ 500,000,000                  
Debt, stated interest rate           3.00%                  
Long-term debt 497,000,000   497,000,000 497,000,000                      
Fair value 456,000,000   462,000,000 456,000,000                      
Senior Notes 6.25% Due 2032                              
Debt Instrument [Line Items]                              
Debt, face amount                           $ 400,000,000  
Debt, stated interest rate                           6.25%  
Long-term debt 398,000,000   397,000,000 397,000,000                      
Fair value 432,000,000   442,000,000 438,000,000                      
Senior Notes 4.95% Due 2033                              
Debt Instrument [Line Items]                              
Debt, face amount         $ 500,000,000                    
Debt, stated interest rate         4.95%                    
Long-term debt 497,000,000   497,000,000 497,000,000                      
Fair value 504,000,000   513,000,000 511,000,000                      
Senior Notes 5.15% Due 2036                              
Debt Instrument [Line Items]                              
Debt, face amount   $ 1,000,000,000                          
Debt, stated interest rate   5.15%                          
Long-term debt 990,000,000   0 0                      
Fair value 1,000,000,000   0 0                      
Senior Notes 4.35% Due 2044                              
Debt Instrument [Line Items]                              
Debt, face amount                         $ 350,000,000    
Debt, stated interest rate                         4.35%    
Long-term debt 347,000,000   347,000,000 347,000,000                      
Fair value 297,000,000   304,000,000 299,000,000                      
Senior Notes 3.70% Due 2045                              
Debt Instrument [Line Items]                              
Debt, face amount                       $ 400,000,000      
Debt, stated interest rate                       3.70%      
Long-term debt 396,000,000   396,000,000 396,000,000                      
Fair value 311,000,000   314,000,000 310,000,000                      
Senior Notes 4.125% Due 2047                              
Debt Instrument [Line Items]                              
Debt, face amount                   $ 850,000,000          
Debt, stated interest rate                   4.125%          
Long-term debt 843,000,000   843,000,000 843,000,000                      
Fair value 688,000,000   702,000,000 699,000,000                      
Senior Notes 4.20% Due 2048                              
Debt Instrument [Line Items]                              
Debt, face amount                 $ 600,000,000            
Debt, stated interest rate                 4.20%            
Long-term debt 591,000,000   591,000,000 591,000,000                      
Fair value 491,000,000   498,000,000 493,000,000                      
Senior Notes 3.95% Due 2050                              
Debt Instrument [Line Items]                              
Debt, face amount             $ 500,000,000                
Debt, stated interest rate             3.95%                
Long-term debt 492,000,000   492,000,000 491,000,000                      
Fair value 389,000,000   392,000,000 392,000,000                      
Senior Notes 3.70% Due 2052                              
Debt Instrument [Line Items]                              
Debt, face amount           $ 500,000,000                  
Debt, stated interest rate           3.70%                  
Long-term debt 494,000,000   494,000,000 494,000,000                      
Fair value $ 367,000,000   $ 375,000,000 $ 373,000,000                      
[1] Consists of both short-term and long-term debt. See Note 4 – Debt for further discussion.