Acquisitions and Divestiture (Intangible Assets) (Details) - Cinnober $ in Millions |
Jan. 30, 2019
USD ($)
|
Jan. 31, 2019
USD ($)
|
|---|---|---|
| Finite Lived And Indefinite Lived Intangible Assets [Line Items] | ||
| Intangible assets, finite-lived | $ 74 | |
| Customer relationships | ||
| Finite Lived And Indefinite Lived Intangible Assets [Line Items] | ||
| Intangible assets, finite-lived | $ 67 | |
| Estimated average useful life | 13 years | |
| Amortization period of intangible assets for tax purposes | 5 years | |
| Customer relationships | Discount rate used | ||
| Finite Lived And Indefinite Lived Intangible Assets [Line Items] | ||
| Discount rate used | 0.095 |