Restructuring Program - Restructuring Activity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2024
Restructuring Reserve [Roll Forward]
Beginning balance		$ 166	$ 166
Cost incurred	$ 47	886	933
Cost paid/settled			(921)
Ending balance	178		178
Separation Costs
Restructuring Reserve [Roll Forward]
Beginning balance		133	133
Cost incurred	25	16	41
Cost paid/settled			(58)
Ending balance	115		115
Asset-Related Costs
Restructuring Reserve [Roll Forward]
Beginning balance		0	0
Cost incurred	9	30	39
Cost paid/settled			(39)
Ending balance	0		0
Other Costs
Restructuring Reserve [Roll Forward]
Beginning balance		32	32
Cost incurred	14	$ 839	853
Cost paid/settled			(823)
Ending balance	$ 62		$ 62