Equity and Accumulated Other Comprehensive Income (Loss) - Equity (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
	Feb. 06, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019	May 17, 2019
Equity [Abstract]
Common Stock, Shares Authorized		1,000,000,000		1,000,000,000		1,000,000,000
Common Stock, Par or Stated Value Per Share		$ 0.01		$ 0.01		$ 0.01
Preferred Stock, Shares Authorized		100,000,000		100,000,000		100,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01		$ 0.01		$ 0.01
Equity offering, sale of common stock	8,400,000
Shares Issued, Price Per Share	$ 58.58
Equity offering, sale of common stock, net	$ 494.2	$ 494.2	$ (0.2)	$ 494.2	$ 445.3
Proceeds from Issuance of Common Stock used to Repay Debt	$ 100.0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares		500,000		500,000
Preferred Stock, Shares Issued		650,000		650,000		650,000	650,000
Stock Repurchase Program, Authorized Amount		$ 100.0		$ 100.0