Income Taxes - Tax Credit Carryforwards (Details 5) $ in Millions	Sep. 03, 2015 USD ($)
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 511
2016 - 2020
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	85
2021 - 2025
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	142
2026 - 2030
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	126
2031 - 2035
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	119
Indefinite
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	39
Federal [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	303
Federal [Member] | 2016 - 2020
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	20
Federal [Member] | 2021 - 2025
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	99
Federal [Member] | 2026 - 2030
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	65
Federal [Member] | 2031 - 2035
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	119
Federal [Member] | Indefinite
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
State [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	208
State [Member] | 2016 - 2020
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	65
State [Member] | 2021 - 2025
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	43
State [Member] | 2026 - 2030
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	61
State [Member] | 2031 - 2035
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
State [Member] | Indefinite
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 39