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Subsequent Events (Narrative) (Details) - USD ($) $ in Millions		2 Months Ended	12 Months Ended
	Apr. 01, 2021	May 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	May 28, 2021	Apr. 06, 2021	Feb. 04, 2019
5.875% Senior Notes | Senior Notes
Subsequent Event [Line Items]
Coupon rate			5.875%
Cash paid for repurchases of debt				$ 1.0
Debt instrument, principal amount repurchased				1.3
5.875% Senior Notes | Senior Notes | Debt instrument, redemption, period one
Subsequent Event [Line Items]
Debt instrument redemption price percentage			102.938%
5.875% Senior Notes | Senior Notes | Debt instrument, redemption, period two
Subsequent Event [Line Items]
Debt instrument redemption price percentage			101.439%
5.875% Senior Notes | Senior Notes | Debt instrument, redemption, period three
Subsequent Event [Line Items]
Debt instrument redemption price percentage			100.00%
6.375% Senior Notes | Senior Notes
Subsequent Event [Line Items]
Coupon rate			6.375%
Principal amount of notes								$ 550.0
Cash paid for repurchases of debt				3.5
Debt instrument, principal amount repurchased				4.4
6.375% Senior Notes | Senior Notes | Debt instrument, redemption, period one
Subsequent Event [Line Items]
Debt instrument redemption price percentage			103.188%
6.375% Senior Notes | Senior Notes | Debt instrument, redemption, period two
Subsequent Event [Line Items]
Debt instrument redemption price percentage			101.594%
6.375% Senior Notes | Senior Notes | Debt instrument, redemption, period three
Subsequent Event [Line Items]
Debt instrument redemption price percentage			100.00%
Term Loan B | Term Loan
Subsequent Event [Line Items]
Principal amount of debt prepaid				101.9	$ 130.0
Quarterly principal payment percent			0.25%
Cash paid for repurchases of debt				22.0
Debt instrument, principal amount repurchased				$ 28.0
Subsequent Event | Revolving Credit Facility
Subsequent Event [Line Items]
Principal amount of debt instrument amended							$ 1,250.0
Principal amount of debt still outstanding with a maturity of March 22, 2023							250.0
Subsequent Event | 5.875% Senior Notes | Senior Notes
Subsequent Event [Line Items]
Coupon rate	5.875%
Principal amount of debt prepaid	$ 518.7
Debt Instrument, Redemption Premium	$ 15.2
Subsequent Event | 6.375% Senior Notes | Senior Notes
Subsequent Event [Line Items]
Coupon rate	6.375%
Principal amount of debt prepaid	$ 545.6
Debt Instrument, Redemption Premium	$ 17.4
Subsequent Event | 6.375% Senior Notes | Senior Notes | Debt instrument, redemption, period three
Subsequent Event [Line Items]
Debt instrument redemption price percentage	101.375%
Subsequent Event | 5.500% Senior Notes
Subsequent Event [Line Items]
Discount Rate, Basis Spread on Treasury Rate	0.50%
Subsequent Event | 5.500% Senior Notes | Senior Notes
Subsequent Event [Line Items]
Coupon rate	5.50%
Principal amount of notes	$ 1,000.0
Debt instrument redemption premium percentage, as a percentage of principal amount prepaid or redeemed	1.00%
Subsequent Event | 5.500% Senior Notes | Senior Notes | Debt instrument, redemption, period one
Subsequent Event [Line Items]
Debt instrument redemption price percentage	100.00%
Percentage of principal amount that may be redeemed with the net proceeds of certain equity offerings	40.00%
Redemption price percentage, certain equity offerings	105.50%
Subsequent Event | 5.500% Senior Notes | Senior Notes | Debt instrument, redemption, period two
Subsequent Event [Line Items]
Debt instrument redemption price percentage	102.75%
Subsequent Event | 5.500% Senior Notes | Senior Notes | Debt instrument, redemption, period four
Subsequent Event [Line Items]
Debt instrument redemption price percentage	100.00%
Subsequent Event | 2026 Term Loan A | Term Loan
Subsequent Event [Line Items]
Principal amount of debt instrument amended							444.9
Quarterly principal payment percent	1.25%
Quarterly principal payment percent, year two	1.75%
Quarterly principal payment percent, year three	2.50%
Quarterly principal payment percent, year four	2.50%
Subsequent Event | Term Loan B | Term Loan
Subsequent Event [Line Items]
Cash paid for repurchases of debt		$ 60.1
Debt instrument, principal amount repurchased		$ 60.5				$ 60.5
Subsequent Event | 2023 Term Loan A | Term Loan
Subsequent Event [Line Items]
Principal amount of debt still outstanding with a maturity of March 22, 2023							$ 215.1
Quarterly principal payment percent, year three	2.50%

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