Fair Value of Financial Instruments - Estimated Carrying Amounts and Fair Value of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Carrying Amount
Liabilities
Long-term debt	$ 16,565	$ 10,880
Carrying Amount | Convertible Senior Notes
Liabilities
Long-term debt	0	232
Carrying Amount | Other Debt Obligations
Liabilities
Long-term debt	16,565	10,648
Fair Value
Liabilities
Long-term debt	16,405	10,761
Fair Value | Convertible Senior Notes
Liabilities
Long-term debt	0	509
Fair Value | Other Debt Obligations
Liabilities
Long-term debt	$ 16,405	$ 10,252