Income Taxes (Details)		3 Months Ended		6 Months Ended	9 Months Ended
	Jan. 01, 2018	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Reconciliation to income tax at the statutory rate:
Effective income tax rate (as a percent)		34.70%	33.70%		(11.50%)	36.40%
U.S. Federal tax at statutory rates (as a percent)	21.00%			35.00%