Long-Term Debt and Credit Agreements - Schedule of Long-term Debt (Details) - USD ($)	1 Months Ended		12 Months Ended
	Sep. 30, 2026	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total debt			$ 3,500,000,000	$ 2,075,000,000
Unamortized debt premium			69,000,000	90,000,000
Unamortized debt discount			(10,000,000)	0
Unamortized debt issuance costs			(24,000,000)	(4,000,000)
Total debt			3,535,000,000	2,161,000,000
Less: current portion of long-term debt			0	575,000,000
Long-term debt			$ 3,535,000,000	1,586,000,000
Senior Notes | 3.65% weighted-average private placement senior notes
Debt Instrument [Line Items]
Weighted-average interest rate			3.65%
Total debt			$ 250,000,000	825,000,000
Amount of principal repurchased		$ 575,000,000
Debt instrument, interest rate during period			3.77%
Senior Notes | 3.65% weighted-average private placement senior notes | Scenario Forecast
Debt Instrument [Line Items]
Amount of principal repurchased	$ 250,000,000
Senior Notes | 3.90% senior notes due May 15, 2027
Debt Instrument [Line Items]
Stated percentage			3.90%
Total debt			$ 750,000,000	750,000,000
Senior Notes | 4.375% senior notes due March 15, 2029
Debt Instrument [Line Items]
Stated percentage			4.375%
Total debt			$ 500,000,000	500,000,000
Senior Notes | 5.60% senior notes due March 15, 2034
Debt Instrument [Line Items]
Stated percentage			5.60%
Total debt			$ 500,000,000	0
Senior Notes | 5.40% senior notes due February 15, 2035
Debt Instrument [Line Items]
Stated percentage			5.40%
Total debt			$ 750,000,000	0
Senior Notes | 5.90% senior notes due February 15, 2055
Debt Instrument [Line Items]
Stated percentage			5.90%
Total debt			$ 750,000,000	$ 0
Revolving credit agreement | Revolving Credit Agreement
Debt Instrument [Line Items]
Total debt			$ 0