Summary of Significant Accounting Policies - Veloce Consideration (Details) (Veloce Technologies Inc., USD $) In Millions, unless otherwise specified	3 Months Ended					9 Months Ended		12 Months Ended		21 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Jun. 20, 2012
Veloce Technologies Inc.
Variable Interest Entity [Line Items]
Total consideration to be transferred				$ 178.5		$ 178.5			$ 178.5		$ 135.0
Research and development expenses incurred	$ 2.9	$ 30.4	$ 9.3	$ 9.6	$ 60.4	$ 126.6	$ 51.9	$ 42.7	$ 66.2	$ 169.3