Debt and Credit Agreements - Schedule of Debt (Details) - USD ($)	1 Months Ended
	Sep. 30, 2026	Sep. 30, 2024	Mar. 31, 2024	Mar. 13, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total debt			$ 2,575,000,000		$ 2,075,000,000
Unamortized debt premium			85,000,000		90,000,000
Unamortized debt discount			(1,000,000)		0
Unamortized debt issuance costs			(8,000,000)		(4,000,000)
Total debt			2,651,000,000		2,161,000,000
Less: current portion of long-term debt			575,000,000		575,000,000
Long-term debt			$ 2,076,000,000		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			$ 825,000,000		825,000,000
Senior Notes | 3.65% weighted-average private placement senior notes | Forecast
Debt Instrument [Line Items]
Amount of principal repurchased	$ 250,000,000	$ 575,000,000
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	$ 500,000,000	0
Unamortized debt discount				(1,000,000)
Unamortized debt issuance costs				$ (5,000,000)
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Total debt			$ 0		$ 0