v3.25.3
SEGMENT INFORMATION - Summary of Reconciliation Operating Income to EBITDA (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues $ 2,085 $ 1,826 $ 5,794 $ 5,157
Segment cost of revenues 1,433 1,259 3,985 3,554
Depreciation 21 21 63 60
Segment earnings 163 142 390 368
Segment Reconciliation [Abstract]        
Corporate/other profit/(loss) (36) (32) (102) (97)
Interest income/(expense) (34) (41) (109) (110)
Depreciation (21) (21) (63) (60)
Amortization (60) (56) (179) (161)
Contingent consideration and compensation (1) (1) (2) (5)
Non-service pension cost (5) (7) (14) (17)
Systems and business enablement (31) 0 (61) 0
Business process transformation expenses 0 (13) (4) (26)
Acquisition and divestiture related expenses 2 (2) (12) (11)
Restructuring program related costs 0 (4) (14) (17)
Other (1) 0 (4) 8
Income before income taxes 130 100 284 252
Total assets 8,204 7,773 8,204 7,773
Capital expenditures 18 20 52 54
Operating Segments, Excluding Intersegment Elimination        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 2,085 1,826 5,794 5,157
Intersegment Eliminations        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues (1) (2) (3) (5)
Operating Segments        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 2,086 1,828 5,797 5,162
Segment earnings 317 277 848 748
Safety Services        
Segment Reconciliation [Abstract]        
Total assets 6,768 6,380 6,768 6,380
Capital expenditures 8 7 22 17
Safety Services | Operating Segments, Excluding Intersegment Elimination        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 1,403 1,215 4,031 3,508
Safety Services | Intersegment Eliminations        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 0 (1) (1) (1)
Safety Services | Operating Segments        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 1,403 1,216 4,032 3,509
Segment cost of revenues 879 772 2,533 2,233
Segment operating expenses 302 258 865 749
Segment other income/expense 5 4 6 4
Depreciation 9 9 27 23
Segment earnings 236 199 667 554
Segment Reconciliation [Abstract]        
Depreciation (9) (9) (27) (23)
Specialty Services        
Segment Reconciliation [Abstract]        
Total assets 1,436 1,393 1,436 1,393
Capital expenditures 10 13 30 37
Specialty Services | Operating Segments, Excluding Intersegment Elimination        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 682 611 1,763 1,649
Specialty Services | Intersegment Eliminations        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues (1) (1) (2) (4)
Specialty Services | Operating Segments        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 683 612 1,765 1,653
Segment cost of revenues 550 490 1,443 1,322
Segment operating expenses 65 58 185 179
Segment other income/expense 2 2 11 7
Depreciation 11 12 33 35
Segment earnings 81 78 181 194
Segment Reconciliation [Abstract]        
Depreciation $ (11) $ (12) $ (33) $ (35)