Restructuring Program - Restructuring Activity (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	9 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2025
Restructuring Reserve [Roll Forward]
Beginning balance		$ 166	$ 166
Cost incurred	$ 55	933	987
Cost paid/settled			(1,016)
Ending balance	138		138
Separation Costs
Restructuring Reserve [Roll Forward]
Beginning balance		133	133
Cost incurred	27	41	68
Cost paid/settled			(126)
Ending balance	75		75
Asset-Related Costs
Restructuring Reserve [Roll Forward]
Beginning balance		0	0
Cost incurred	8	39	47
Cost paid/settled			(47)
Ending balance	0		0
Other Costs
Restructuring Reserve [Roll Forward]
Beginning balance		32	32
Cost incurred	19	$ 853	872
Cost paid/settled			(842)
Ending balance	$ 62		$ 62