Equity (Changes To Equity) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 508.9
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	2,484	12,469
Repurchase Agreements [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Authorized Amount	$ 1,000.0