Income Tax (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Effective Income Tax Rate (Benefit)	20.40%	(9.10%)
Unrecognized tax benefits, related to deficiency interest on positions	$ 12.2		$ 2.4
Increase in potential payment of interest on uncertain tax positions due to acquisitions	9.3
Unrecognized Tax Benefits, Income Tax Penalties Accrued	53.2		$ 27.6
The increase in accrued penalties related to uncertain tax positions due to acquisitions	$ 25.6