Revenues from Contracts with Customers - Narrative (Details) $ in Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) segments	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Disaggregation of Revenue [Line Items]
Number of Reportable Segments | segments		2
Total revenue	$ 8,601	$ 25,159
Revenue, Remaining Performance Obligation	9,775	9,775
Equipment sales
Disaggregation of Revenue [Line Items]
Total revenue	1,589	4,180
Scenario, Forecast [Member]
Disaggregation of Revenue [Line Items]
Revenue, Remaining Performance Obligation			$ 2,467	$ 1,100
Sales Channel, Through Intermediary [Member] | Equipment sales
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,006	$ 2,619