Debt Subsequent Event (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended
	Dec. 31, 2016	Sep. 10, 2016	Sep. 12, 2015	Sep. 15, 2016
Subsequent Event [Line Items]
Debt extinguishment costs		$ 0.0	$ 1.6
Maximum [Member]
Subsequent Event [Line Items]
Aggregate principal amount debt instrument		1,425.0
Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Aggregate principal amount debt instrument		$ 500.0
Subsequent Event [Member] | Early Redemption Premium [Member]
Subsequent Event [Line Items]
Debt extinguishment costs	$ 13.1
Subsequent Event [Member] | Maximum [Member]
Subsequent Event [Line Items]
Aggregate principal amount debt instrument				$ 1,750.0
Debt extinguishment costs	$ 18.0
Subsequent Event [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Increased Borrowing Capacity				100.0
Subsequent Event [Member] | Term Loan A [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Increased Borrowing Capacity				$ 150.0