v3.26.3
Changes in Accumulated Other Comprehensive Loss by Component - Schedule of Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Accumulated Other Comprehensive Income Loss [Line Items]          
Balance $ 1,633 $ 2,623 $ 1,905 $ 2,588 $ 2,588
Other comprehensive income (loss) before reclassifications     (44)   110
Amounts reclassified from Accumulated other comprehensive loss     4   11
Other comprehensive income (loss) 8 (39) (40) 66 121
Balance 1,609 2,269 1,609 2,269 1,905
Currency Options          
Accumulated Other Comprehensive Income Loss [Line Items]          
Other comprehensive income (loss) before reclassifications         4
Foreign Exchange Forward Contracts          
Accumulated Other Comprehensive Income Loss [Line Items]          
Other comprehensive income (loss) before reclassifications     (12)   22
Foreign Currency Items          
Accumulated Other Comprehensive Income Loss [Line Items]          
Other comprehensive income (loss) before reclassifications     (32)   56
Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax          
Accumulated Other Comprehensive Income Loss [Line Items]          
Other comprehensive income (loss) before reclassifications         28
Net Derivative (Losses) Gains on Cash Flow Hedges          
Accumulated Other Comprehensive Income Loss [Line Items]          
Balance     9 (28) (28)
Other comprehensive income (loss) before reclassifications     (12)   26
Amounts reclassified from Accumulated other comprehensive loss     (1)   11
Other comprehensive income (loss)     (13)   37
Balance (4)   (4)   9
Net Derivative (Losses) Gains on Cash Flow Hedges | Currency Options          
Accumulated Other Comprehensive Income Loss [Line Items]          
Other comprehensive income (loss) before reclassifications         4
Net Derivative (Losses) Gains on Cash Flow Hedges | Foreign Exchange Forward Contracts          
Accumulated Other Comprehensive Income Loss [Line Items]          
Other comprehensive income (loss) before reclassifications     (12)   22
Accumulated Defined Benefit Plans Adjustment | Pension Plans          
Accumulated Other Comprehensive Income Loss [Line Items]          
Balance [1]     11 (17) (17)
Other comprehensive income (loss) before reclassifications [1]         30
Amounts reclassified from Accumulated other comprehensive loss [1]     6   (2)
Other comprehensive income (loss) [1]     6   28
Balance [1] 17   17   11
Accumulated Defined Benefit Plans Adjustment | Pension Plans | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax          
Accumulated Other Comprehensive Income Loss [Line Items]          
Other comprehensive income (loss) before reclassifications [1]         30
Accumulated Defined Benefit Plans Adjustment | Other Post-Retirement Benefit Plans          
Accumulated Other Comprehensive Income Loss [Line Items]          
Balance [1]     37 37 37
Other comprehensive income (loss) before reclassifications [1]         (2)
Amounts reclassified from Accumulated other comprehensive loss [1]     (1)   2
Other comprehensive income (loss) [1]     (1)   0
Balance [1] 36   36   37
Accumulated Defined Benefit Plans Adjustment | Other Post-Retirement Benefit Plans | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax          
Accumulated Other Comprehensive Income Loss [Line Items]          
Other comprehensive income (loss) before reclassifications [1]         (2)
Foreign Currency Items          
Accumulated Other Comprehensive Income Loss [Line Items]          
Balance     (50) (106) (106)
Other comprehensive income (loss) before reclassifications     (32)   56
Other comprehensive income (loss)     (32)   56
Balance (82)   (82)   (50)
Foreign Currency Items | Foreign Currency Items          
Accumulated Other Comprehensive Income Loss [Line Items]          
Other comprehensive income (loss) before reclassifications     (32)   56
Accumulated Other Comprehensive Income (Loss)          
Accumulated Other Comprehensive Income Loss [Line Items]          
Balance (41) (9) 7 (114) (114)
Balance $ (33) $ (48) $ (33) $ (48) $ 7
[1] The projected benefit obligation is actuarially determined on an annual basis as of December 31.