Equity and Accumulated Other Comprehensive Income (Loss) Equity (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 30, 2017	Jun. 30, 2017
Equity [Abstract]
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Stock Repurchase Program, Authorized Amount	$ 100.0