| In millions, except per share items | Jun-30-23 | Jun-30-22 | Mar-31-22 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 | Sep-30-20 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| |
| Operating expenses | | | | | | | | |
| Cost of sales, excluding depreciation and amortization | 1,492 | 935 | | | | | | |
| Depreciation and amortization | 80 | 64 | 66 | 53 | 50 | 50 | | 56 |
| Selling, general and administrative | 96 | 73 | 69 | 70 | 67 | 64 | | 66 |
| |
| Asset conversion costs (NOTE 10) | | | | | | | | |
| Other operating loss (income), net | 1 | -5 | 2 | -5 | 1 | -2 | 3 | |
| Operating expenses | 1,709 | 1,082 | 985 | 935 | 868 | 880 | 713 | 1,051 |
| Operating income from continuing operations | 21 | 66 | 25 | 96 | 48 | -9 | -67 | -152 |
| Interest expense, net | 58.0 | 24.0 | 21.0 | 7.0 | 20.0 | 15.0 | -43.0 | 14.0 |
| Non-service components of net periodic benefit cost (NOTE 6) | -4 | -17 | | | | | | |
| (Loss) earnings before income taxes | -33 | 59 | 13 | | 34 | -18 | -228 | |
| Income tax (benefit) expense (NOTE 7) | -9 | 14 | 3 | 22 | 11 | -3 | -20 | -52 |
| Net (loss) earnings | -13 | 50 | 23 | 74 | 37 | -29 | -59 | -92 |
| |
| Other comprehensive income (loss) (NOTE 12): | | | | | | | | |
| Net derivative gains (losses) on cash flow hedges: | | | | | | | | |
| Net gains | | | | | | | | |
| Less: Reclassification adjustment for losses | | | | | | | | |
| Foreign currency translation adjustments | 25 | -20 | 13 | -21 | 12 | 72 | 58 | 40 |
| |
| Change in unrecognized gains and prior service cost related to pension and post-retirement benefit plans, net of tax of nil, respectively | | | | | | | | |
| Other comprehensive income (loss) | | | | | | | | |
| Comprehensive income | 24 | 30 | 51 | 54 | 75 | 55 | 84 | -69 |