Net Income (Loss) Per Common Share - Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Dec. 27, 2024	Sep. 27, 2024	Dec. 29, 2023	Sep. 29, 2023	Dec. 27, 2024	Dec. 29, 2023
Earnings Per Share [Abstract]
Net income (loss)	$ 594	$ 493	$ (287)	$ (685)	$ 1,087	$ (972)
Less: dividends allocated to preferred shareholders	4		14		8	29
Less: income attributable to participating securities	9		0		17	0
Net income (loss) attributable to common shareholders	581		(301)		1,062	(1,001)
Re-allocation of participating securities considered potentially dilutive securities	0		0		1	0
Diluted net income (loss) attributable to common shareholders	$ 581		$ (301)		$ 1,063	$ (1,001)
Weighted average shares outstanding:
Basic (in shares)	346		325		345	324
RSUs, PSUs, ESPP, and the convertible notes (in shares)	11		0		12	0
Diluted (in shares)	357		325		357	324
Net income (loss) per common share
Basic (in dollars per share)	$ 1.68		$ (0.93)		$ 3.08	$ (3.09)
Diluted (in dollars per share)	$ 1.63		$ (0.93)		$ 2.98	$ (3.09)
Anti-dilutive potential common shares excluded (in shares)	0		14		0	14