Commitments and Contingencies - Guarantor Obligations (Details) $ in Millions	Mar. 31, 2017 USD ($)
Guarantor Obligations [Line Items]
Fiscal 2018	$ 27
Fiscal 2019	11
Fiscal 2020 and Thereafter	50
Total	88
Surety bonds
Guarantor Obligations [Line Items]
Fiscal 2018	17
Fiscal 2019	0
Fiscal 2020 and Thereafter	0
Total	17
Letters of credit
Guarantor Obligations [Line Items]
Fiscal 2018	4
Fiscal 2019	3
Fiscal 2020 and Thereafter	33
Total	40
Standby letters of credit
Guarantor Obligations [Line Items]
Fiscal 2018	6
Fiscal 2019	8
Fiscal 2020 and Thereafter	17
Total	$ 31