v3.25.4
SHAREHOLDERS' EQUITY - Schedule of Changes in AOCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance   $ 8,464 $ 7,145 $ 9,362
Other comprehensive income (loss) before reclassifications – net of taxes   101 (545) (532)
Reclassifications from AOCI – net of taxes   (120) (147) (318)
Other comprehensive income (loss)   (19) (691) (850)
Equity, ending balance   10,390 8,464 7,145
Pension Plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
AOCI, decrease due to remeasurement       (305)
Nihon Medi-Physics        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Foreign currency translation gain, reclassification adjustment $ 63      
Defined benefit pension plan loss, reclassification adjustment $ 8      
Accumulated other comprehensive income (loss) – net        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance   (1,379) (691) (1,878)
Spin-Off related adjustments – net of taxes       2,000
Equity, ending balance   (1,388) (1,379) (691)
Currency translation adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance   (1,973) (1,706) (1,845)
Equity, ending balance   (1,548) (1,973) (1,706)
Currency translation adjustments, including noncontrolling interest        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Other comprehensive income (loss) before reclassifications – net of taxes   354 (271) 74
Reclassifications from AOCI – net of taxes   63 0 0
Other comprehensive income (loss)   418 (271) 74
Spin-Off related adjustments – net of taxes       28
Other comprehensive income (loss) before reclass, tax   60 (19) 22
Reclass from AOCI, tax   0 0 0
Spin-Off related adjustments, tax       0
Currency translation adjustments, attributable to noncontrolling interest        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Other comprehensive income (loss)   (7) (4) (37)
Pension and Other Postretirement Plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance   576 1,033 (42)
Equity, ending balance   158 576 1,033
Pension and Other Postretirement Plans, including to noncontrolling interest        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Other comprehensive income (loss) before reclassifications – net of taxes   (259) (306) (601)
Reclassifications from AOCI – net of taxes   (163) (150) (296)
Other comprehensive income (loss)   (422) (456) (897)
Spin-Off related adjustments – net of taxes       1,972
Other comprehensive income (loss) before reclass, tax   74 93 186
Reclass from AOCI, tax   50 44 97
Spin-Off related adjustments, tax       (509)
Pension and Other Postretirement Plans, attributable to noncontrolling interest        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Other comprehensive income (loss)   (3) 0 0
Cash flow hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance   18 (18) 9
Equity, ending balance   3 18 (18)
Cash flow hedges, including noncontrolling interest        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Other comprehensive income (loss) before reclassifications – net of taxes   5 33 (5)
Reclassifications from AOCI – net of taxes   (21) 3 (22)
Other comprehensive income (loss)   (16) 36 (27)
Spin-Off related adjustments – net of taxes       0
Other comprehensive income (loss) before reclass, tax   5 (11) 1
Reclass from AOCI, tax   2 (1) 6
Spin-Off related adjustments, tax       0
Cash flow hedges, attributable to noncontrolling interest        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Other comprehensive income (loss)   0 0 0
Equity attributable to noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance   18 12 5
Other comprehensive income (loss)   (10) (4) (37)
Equity, ending balance   $ 11 $ 18 $ 12