v3.26.1
Fair Value Measures and Disclosures (Tables)
6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping [Table Text Block]
The following table summarizes the fair value of the Corporation's financial instruments at June 30, 2026 and December 31, 2025:

Fair Value of Financial InstrumentsJun 30, 2026Dec 31, 2025
In millionsCostGainLossFair ValueCostGainLossFair Value
Cash equivalents 1
$12 $— $— $12 $11 $— $— $11 
Long-term debt including debt due within one year$(144)$— $(14)$(158)$(145)$— $(12)$(157)
1.Money market fund is included in "Cash and cash equivalents" in the consolidated balance sheets and held at amortized cost, which approximates fair value.