v3.26.1
Debt - Summary of Debt (Detail) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 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] $ 8,386,000,000 $ 6,897,000,000 $ 6,894,000,000                      
Fair value 7,728,000,000 6,345,000,000 6,247,000,000                      
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 500,000,000 499,000,000 499,000,000                      
Fair value 493,000,000 493,000,000 484,000,000                      
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 500,000,000 499,000,000 499,000,000                      
Fair value 492,000,000 492,000,000 483,000,000                      
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 320,000,000 323,000,000 322,000,000                      
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 547,000,000 551,000,000 542,000,000                      
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 478,000,000 484,000,000 470,000,000                      
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 501,000,000 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 457,000,000 462,000,000 447,000,000                      
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 397,000,000 397,000,000 397,000,000                      
Fair value 435,000,000 442,000,000 434,000,000                      
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 507,000,000 513,000,000 503,000,000                      
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 1,001,000,000 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 295,000,000 304,000,000 300,000,000                      
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 305,000,000 314,000,000 310,000,000                      
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 843,000,000 843,000,000 842,000,000                      
Fair value 678,000,000 702,000,000 695,000,000                      
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 478,000,000 498,000,000 493,000,000                      
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 380,000,000 392,000,000 393,000,000                      
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 $ 361,000,000 $ 375,000,000 $ 371,000,000                      
[1] Consists of both short-term and long-term debt. See Note 4 – Debt for further discussion.