Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Mar. 29, 2015
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Cost recognized for matching contributions	$ 1.5	$ 1.3
United States Postretirement Benefit Plan of US Entity
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Participant balances percent vested (percent)	100.00%
Deferred compensation plan obligations	$ 13.6		$ 13.1
Deferred compensation plan assets	14.2		16.5
United States Postretirement Benefit Plan of US Entity | Fox Enterprises
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred compensation plan assets	0.8		0.8
Deferred compensation liability	1.8		1.7
International Employee Benefit Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred compensation liability	$ 0.7		$ 1.0