Debt (Details) - Term Loan	3 Months Ended	6 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Term Loan Due September 2023
Debt Instrument [Line Items]
Repayments of debt	$ 539,000,000	$ 890,000,000
Debt maximum borrowing capacity	925,000,000	925,000,000
Term Loan Due October 2022
Debt Instrument [Line Items]
Repayments of debt		320,000,000
Debt maximum borrowing capacity	$ 800,000,000	$ 800,000,000