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Fair Value Measurements - Financial Instruments Not Required to be Measured at Fair Value (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Carrying Value | Level 2    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Marketable securities, current $ 74 $ 69
Carrying Value | Level 2 | 2028 Notes ($4.250% Senior Notes)    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Debt 587 597
Carrying Value | Level 2 | 2029 Notes ($1.125% Convertible Senior Notes)    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Debt 562 561
Carrying Value | Level 3    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Notes receivable, including noncurrent portion 9 9
Fair Value | Level 2    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Marketable securities, current 74 69
Fair Value | Level 2 | 2028 Notes ($4.250% Senior Notes)    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Debt 552 573
Fair Value | Level 2 | 2029 Notes ($1.125% Convertible Senior Notes)    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Debt 648 626
Fair Value | Level 3    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Notes receivable, including noncurrent portion 9 9
Cash | Carrying Value | Level 1    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Cash and cash equivalents 1,396 1,357
Cash | Fair Value | Level 1    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Cash and cash equivalents 1,396 1,357
Cash Equivalents | Carrying Value | Level 2    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Cash and cash equivalents 939 1,162
Cash Equivalents | Fair Value | Level 2    
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis    
Cash and cash equivalents $ 939 $ 1,162