Litigation, Other Contingencies and Guarantees (Narrative) (Details) |
30 Months Ended |
|---|---|
|
Apr. 30, 2016
USD ($)
| |
| Loss Contingencies [Line Items] | |
| Loss Contingency, Damages Awarded, Value | $ 3,100,000 |
| Estimate Potential Environmental Liabilities Minimum | 19,000,000 |
| Estimate Potential Environmental Liabilities Maximum | 25,000,000 |
| Recorded Best Estimate | 23,000,000 |
| ERISA Class Action Litigation [Member] | |
| Loss Contingencies [Line Items] | |
| Estimated Litigation Liability | 5,000,000 |
| Pricing Class Action Litigation [Member] | |
| Loss Contingencies [Line Items] | |
| Estimated Litigation Liability | $ 50,000,000 |