Overview and Summary of Significant Accounting Policies - Intangible Assets (Details)	12 Months Ended
	Mar. 31, 2020
Acquired backlog
Finite-Lived Intangible Assets [Line Items]
Useful life	1 year
Amortization period	1 year
Software | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	2 years
Software | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	10 years
Developed technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	6 years
Developed technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	7 years
Program assets | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	4 years
Program assets | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	14 years