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Other Income (Tables)
 12 Months Ended
Dec. 31, 2020
Other Income, Nonoperating [Abstract]  
Other income
In millionsYear ended December 31,202020192018
Gain on disposal of property$— $— $338 
Gain on disposal of land11 50 27 
Other (1)
(5)3 11 
Total other income$6 $53 $376 
(1)Includes foreign exchange gains and losses related to foreign exchange forward contracts and the re-measurement of foreign currency denominated monetary assets and liabilities. See Note 22 – Financial instruments for additional information.