Restructuring Costs - Narrative (Details) $ in Millions	Jun. 30, 2019 USD ($)
Fiscal 2019 Plan
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	$ 508
Fiscal 2019 Plan | Workforce Reductions
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	364
Fiscal 2019 Plan | Facilities Costs
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	144
Fiscal 2018 Plan
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	772
Fiscal 2018 Plan | Workforce Reductions
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	585
Fiscal 2018 Plan | Facilities Costs
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	187
Fiscal 2017 Plan
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	214
Fiscal 2017 Plan | Workforce Reductions
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	205
Fiscal 2017 Plan | Facilities Costs
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	$ 9