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| (in millions) | Foreign Currency Translation | | Post-retirement Benefit Plans | | Derivative Instruments | | Total | | |
| Balance at January 1, 2026 | $ | (191) | | | $ | (39) | | | $ | 10 | | | $ | (220) | | | |
| Foreign currency translation adjustment | 16 | | | — | | | — | | | 16 | | | |
| Amount of currency translation adjustment relating to divestiture of foreign subsidiaries reclassified into net income | 5 | | | — | | | — | | | 5 | | | |
| Tax on foreign currency translation adjustment | (18) | | | — | | | — | | | (18) | | | |
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| Amortization of actuarial gain on post-retirement benefit plans into other non-operating income, net | — | | | (1) | | | — | | | (1) | | | |
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| Unrealized loss on derivative hedge agreements | — | | | — | | | (8) | | | (8) | | | |
| Tax on unrealized gain on derivative hedge agreements | — | | | — | | | 2 | | | 2 | | | |
| Reclassification of unrealized gain on foreign exchange agreements into revenue | — | | | — | | | (3) | | | (3) | | | |
| Reclassification of unrealized gain on foreign exchange agreements into cost of revenue | — | | | — | | | (2) | | | (2) | | | |
| Balance at March 31, 2026 | $ | (188) | | | $ | (40) | | | $ | (1) | | | $ | (229) | | | |
| Foreign currency translation adjustment | (53) | | | — | | | — | | | (53) | | | |
| Amount of gain recognized relating to divestiture of foreign subsidiaries reclassified into net income | — | | | (3) | | | | | (3) | | | |
| Amount of currency translation adjustment relating to divestiture of foreign subsidiaries reclassified into net income | (13) | | | — | | | — | | | (13) | | | |
| Tax on foreign currency translation adjustment | (3) | | | — | | | — | | | (3) | | | |
| Amortization of actuarial loss on post-retirement plans into other non-operating income, net | — | | | 1 | | | — | | | 1 | | | |
| Foreign currency translation adjustment for post-retirement benefit plans | | | 2 | | | | | 2 | | | |
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| Unrealized loss on derivative hedge agreements | — | | | — | | | (4) | | | (4) | | | |
| Tax on unrealized loss on derivative hedge agreements | — | | | — | | | 1 | | | 1 | | | |
| Reclassification of unrealized loss on foreign exchange agreements into revenue | — | | | — | | | 1 | | | 1 | | | |
| Reclassification of unrealized gain on foreign exchange agreements into cost of revenue | — | | | — | | | (2) | | | (2) | | | |
| Balance at June 30, 2026 | $ | (257) | | | $ | (40) | | | $ | (5) | | | $ | (302) | | | |
| Foreign currency translation adjustment | (24) | | | — | | | — | | | (24) | | | |
| Amount of currency translation adjustment relating to divestiture of foreign subsidiaries reclassified into net income | 7 | | | — | | | — | | | 7 | | | |
| Tax on foreign currency translation adjustment | 11 | | | — | | | — | | | 11 | | | |
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| Foreign currency translation adjustment for post-retirement benefit plans | — | | | 1 | | | — | | | 1 | | | |
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| Unrealized loss on derivative hedge agreements | — | | | — | | | (2) | | | (2) | | | |
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| Reclassification of unrealized loss on foreign exchange agreements into revenue | — | | | — | | | 3 | | | 3 | | | |
| Reclassification of unrealized gain on foreign exchange agreements into cost of revenue | — | | | — | | | (1) | | | (1) | | | |
| Balance at September 30, 2026 | $ | (263) | | | $ | (39) | | | $ | (5) | | | $ | (307) | | | |