Stock-Based Employee Compensation - Stock Option (Narrative) (Details) - Employee Stock Option $ / shares in Units, shares in Millions, $ in Millions	9 Months Ended
	Jan. 01, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 0.7
Compensation cost not yet recognized, period for recognition	10 months 13 days
Options vested and expected to vest (shares) | shares	1.5
Options vested and expected to vest, weighted average exercise price (usd per share) | $ / shares	$ 11.97
Options vested and expecting to vest, weighted average remaining contractual term	3 years 7 months 17 days
Options vested and expected to vest, aggregate intrinsic value	$ 17.5
Options, fully vested, outstanding (shares) | shares	1.1
Options, fully vested, outstanding, weighted average exercise price (usd per share) | $ / shares	$ 10.40
Options, fully vested, weighted average remaining contractual term	3 years 2 months 26 days
Options, fully vested, aggregate intrinsic value	$ 14.7