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Debt and Other Credit Facilities (Senior Notes) (Details) - Senior Notes - Notes Due 2028 - USD ($)		6 Months Ended
	Sep. 30, 2020	Jun. 30, 2021
Debt Instrument [Line Items]
Interest rate, stated percentage	4.75%
Net proceeds from offering fee	$ 245,000,000
Interest rate, stated redeem percentage		35.00%
Prior to September 30, 2023
Debt Instrument [Line Items]
Redemption price, percentage		100.00%
On or after September 30, 2023
Debt Instrument [Line Items]
Redemption price, percentage		104.75%
Change of control
Debt Instrument [Line Items]
Redemption price, percentage		101.00%
Centauri LLC
Debt Instrument [Line Items]
Aggregate principal amount	$ 250,000,000

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