Restructuring and Other Exit Activities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 10	$ 0	$ 41
Q4 2024 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Incurred cost			33
Restructuring charges	6		33
Equinix Metal Wind Down
Restructuring Cost and Reserve [Line Items]
Incurred cost			8
Expected cost				$ 14
Restructuring charges	$ 4		$ 8