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Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2022	Oct. 01, 2021	Sep. 30, 2021
Debt Instrument [Line Items]
Finance lease obligation	$ 13		$ 10
Subtotal	1,042		1,027
Less: short-term debt	(19)		(19)
Long-term debt	1,023		1,008
Convertible Notes
Debt Instrument [Line Items]
Unamortized discount on convertible notes	$ 0		(23)
3.25 percent convertible notes due 2037 \| Convertible Notes
Debt Instrument [Line Items]
Interest rate	3.25%	3.25%
Debt	$ 321		321
4.50 percent notes due 2028 \| Senior Notes
Debt Instrument [Line Items]
Interest rate	4.50%
Long-term debt outstanding	$ 271		270
6.25 percent notes due 2025 \| Senior Notes
Debt Instrument [Line Items]
Interest rate	6.25%
Long-term debt outstanding	$ 297		296
Term loan due 2024 \| Term Loan
Debt Instrument [Line Items]
Long-term debt outstanding	$ 140		$ 153