Pension And Other Postretirement Benefit Plans Pension And Other Postretirement Benefit Plans (Narrative) (Details) $ in Millions	6 Months Ended
	Sep. 30, 2015 USD ($)
Pension and Other Postretirement Benefits [Line Items]
Contributions to qualified and non-qualified pension plans	$ 3.8
Expected additional contributions in the current fiscal year	8.6
ERISA-regulated U.S. plan [Member]
Pension and Other Postretirement Benefits [Line Items]
Expected additional contributions in the current fiscal year	2.7
Non-ERISA regulated and Other Plans [Member]
Pension and Other Postretirement Benefits [Line Items]
Expected additional contributions in the current fiscal year	$ 5.9