| In millions, except per share items | Jun-30-23 | Mar-31-23 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Net income | | | 109.0 | 152.0 | 200.0 | 210.0 | 205.0 | -21.0 |
| Depreciation and amortization [+] | | | 390.0 | 391.0 | 389.0 | 383.0 | 379.0 | 371.0 |
| Depreciation | | | 367.0 | 368.0 | 365.0 | 360.0 | 356.0 | 348.0 |
| Amortization of intangible assets | | | 23.0 | 23.0 | 24.0 | 23.0 | 23.0 | 23.0 |
| Stock-based compensation | | | 16.0 | 16.0 | 17.0 | 24.0 | 20.0 | 15.0 |
| Deferred taxes | | | -15.0 | -20.0 | -1.0 | 1.0 | -55.0 | -6.0 |
| Change in working capital | | | -300.0 | -427.0 | -216.0 | -165.0 | | |
| Other | | | -300.0 | -427.0 | -216.0 | -165.0 | | |
| Other operating activities | | | 0.0 | -102.0 | -231.0 | -243.0 | -218.0 | 58.0 |
| Cash from operations | | | 200.0 | 10.0 | 158.0 | 210.0 | 606.0 | 464.0 |
| |
| Capital expenditures | | | -442.0 | -432.0 | -369.0 | -373.0 | -338.0 | -316.0 |
| Purchases of property and equipment | | | -442.0 | -432.0 | -369.0 | -373.0 | -338.0 | -316.0 |
| Acquisitions | | | -1.0 | | | | -18.0 | -15.0 |
| Sales of short-term investments, net [+] | | | | 9.0 | 7.0 | 7.0 | -30.0 | -2.0 |
| Purchases of short-term investments | | | -29.0 | -26.0 | -32.0 | -33.0 | -45.0 | -43.0 |
| Sales of short-term investments | | | 62.0 | 35.0 | 39.0 | 40.0 | 15.0 | 41.0 |
| Other cash from investing | | | 82.0 | 87.0 | 87.0 | -10.0 | 20.0 | 18.0 |
| Cash from investing | | | -328.0 | -337.0 | -293.0 | -394.0 | -366.0 | -315.0 |
| |
| Cash dividends paid | | | -58.0 | -58.0 | -58.0 | -44.0 | -29.0 | -14.0 |
| Repurchase of common stock, net | | | | -48.0 | | -23.0 | | |
| Financing costs | | | | | -18.0 | | -15.0 | -15.0 |
| Other cash from financing | | | 197.0 | 208.0 | -64.0 | -495.0 | -545.0 | -312.0 |
| Cash from financing | | | 96.0 | 118.0 | -127.0 | -549.0 | -559.0 | -311.0 |
| |
| Free cash flow | | | -242.0 | -422.0 | -211.0 | -163.0 | 268.0 | 148.0 |
| Per share (diluted) | | | ($1.66) | ($2.89) | ($1.44) | ($1.12) | $1.84 | $1.02 |