Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions |
Nov. 30, 2016 |
May 31, 2016 |
|---|---|---|
| CURRENT ASSETS | ||
| Allowances for receivables | $ 218 | $ 178 |
| Allowances for spare parts, supplies and fuel | $ 225 | $ 218 |
| COMMON STOCKHOLDERS' INVESTMENT | ||
| Common stock, par value | $ 0.10 | $ 0.10 |
| Common stock, shares authorized | 800 | 800 |
| Common stock, shares issued | 318 | 318 |