| USD ($) $ in Millions | Jun 30, 2026 | Mar 31, 2026 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 |
|---|---|---|---|---|---|---|---|---|
Cash flows – operating activities | ||||||||
Net income (loss) | $ 649 | $ 4,750 | $ 453 | $ 492 | $ 264 | $ (99) | $ 1,280 | $ (106) |
Adjustments to reconcile net income (loss) to cash from (used for) operating activities | ||||||||
Depreciation and amortization of property, plant, and equipment (Note 6) | 182 | 166 | 152 | 145 | 149 | 336 | 191 | 188 |
Amortization of intangible assets (Note 8) | 236 | 176 | 61 | 60 | 56 | 63 | 63 | 63 |
(Gains) losses on purchases and sales of business interests | (23) | (4,405) | (44) | (1) | (21) | (7) | (855) | - |
Principal pension plans – net (Note 13) | (606) | (90) | (89) | (90) | (89) | (94) | (91) | (95) |
Other postretirement benefit plans – net (Note 13) | (42) | (80) | (57) | (66) | (44) | (68) | (74) | (47) |
Provision (benefit) for income taxes (Note 16) | 276 | 354 | 293 | 153 | 68 | (23) | 322 | 10 |
Cash recovered (paid) during the year for income taxes | (724) | (534) | (126) | (218) | (145) | (126) | (115) | (58) |
Changes in operating working capital: | ||||||||
Decrease (increase) in current receivables | (1,453) | 610 | (468) | 113 | 918 | (655) | 324 | 359 |
Decrease (increase) in due from related parties | - | - | - | - | - | 1 | 50 | (56) |
Decrease (increase) in inventories, including deferred inventory costs | (814) | (930) | (164) | (451) | (432) | 137 | (571) | (717) |
Decrease (increase) in current contract assets | 59 | (417) | (9) | (302) | (345) | 174 | (138) | (270) |
Increase (decrease) in accounts payable and equipment project payables | 476 | 473 | 359 | 476 | (269) | 876 | 400 | (306) |
Increase (decrease) in due to related parties | - | - | - | - | - | 18 | (19) | (365) |
Increase (decrease) in contract liabilities and current deferred income | 8,121 | 5,574 | 559 | 736 | 1,124 | 64 | 711 | 885 |
All other operating activities | (845) | (457) | 61 | (680) | (74) | 528 | (501) | 71 |
Cash from (used for) operating activities | 5,492 | 5,188 | 980 | 367 | 1,161 | 1,127 | 979 | (444) |
Cash flows – investing activities | ||||||||
Additions to property, plant, and equipment and internal-use software | (386) | (397) | (247) | (173) | (186) | (159) | (157) | (217) |
Dispositions of property, plant, and equipment | 24 | 177 | (1) | - | 34 | 3 | 9 | 4 |
Purchases of and contributions to equity method investments | (10) | (10) | (27) | (24) | (6) | (2) | (17) | (91) |
Sales of and distributions from equity method investments | 34 | 44 | 157 | 1 | 90 | 1 | 2 | 29 |
Net cash paid for principal businesses purchased | 1 | (4,886) | - | - | - | - | - | - |
Proceeds from principal business dispositions | (4) | 598 | 59 | 1 | - | - | 639 | - |
All other investing activities | 570 | 183 | (107) | 74 | (25) | 43 | 60 | (9) |
Cash from (used for) investing activities | 229 | (4,291) | (167) | (121) | (93) | (114) | 537 | (285) |
Cash flows – financing activities | ||||||||
Newly issued debt (maturities longer than 90 days) | - | 2,567 | - | - | - | - | - | - |
Net increase (decrease) in borrowings of maturities of 90 days or less | - | - | - | - | 0 | - | - | (23) |
Transfers from (to) Parent | - | - | - | - | 0 | (31) | 941 | 2,023 |
Dividends paid to stockholders | (136) | (137) | (68) | (70) | (69) | - | - | - |
Purchases of common stock for treasury | (2,393) | (1,278) | (660) | (480) | (1,101) | - | - | - |
All other financing activities | (214) | (711) | (45) | (56) | (86) | 615 | 30 | (66) |
Cash from (used for) financing activities | (2,743) | 442 | (774) | (604) | (1,257) | 585 | 970 | 1,934 |
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash | (30) | (16) | 15 | 145 | 90 | 18 | (34) | (32) |
Increase (decrease) in cash, cash equivalents, and restricted cash, including cash classified within assets held for sale | 2,948 | 1,323 | 54 | (214) | (98) | 1,616 | 2,452 | 1,173 |
Less: Net increase (decrease) in cash classified within assets held for sale | - | (2) | 2 | - | 0 | - | (72) | (531) |
Increase (decrease) in cash, cash equivalents, and restricted cash | $ 2,949 | $ 1,324 | $ 53 | $ (214) | $ (98) | $ 1,616 | $ 2,524 | $ 1,704 |