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Fair Value Measurements - Fair Values and Related Carrying Values of Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes receivable, net, carrying amount $ 760 $ 257 $ 385
Notes receivable, net, fair value 778 270 403
Debt, excluding capital lease obligations, carrying amount (57,669) (52,055) (56,794)
Debt, excluding capital lease obligations, fair value (53,642) (51,039) (52,856)
Level 2      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes receivable, net, fair value 766 270 403
Debt, excluding capital lease obligations, fair value (53,642) $ (51,039) $ (52,856)
Level 3      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notes receivable, net, fair value $ 12