Commitments and Contingencies - Guarantor Obligations (Details) $ in Millions	Jun. 30, 2017 USD ($)
Guarantor Obligations [Line Items]
Fiscal 2018	$ 371
Fiscal 2019	217
Fiscal 2020 and Thereafter	343
Total	931
Surety bonds
Guarantor Obligations [Line Items]
Fiscal 2018	51
Fiscal 2019	157
Fiscal 2020 and Thereafter	36
Total	244
Letters of credit
Guarantor Obligations [Line Items]
Fiscal 2018	293
Fiscal 2019	50
Fiscal 2020 and Thereafter	283
Total	626
Stand-by letters of credit
Guarantor Obligations [Line Items]
Fiscal 2018	27
Fiscal 2019	10
Fiscal 2020 and Thereafter	24
Total	$ 61