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Other Income (Expense), Net
 3 Months Ended
Mar. 31, 2021
Other Income and Expenses [Abstract]  
Other Income (Expense), Net OTHER INCOME (EXPENSE), NET
 
Other, net, which is included in other income (expense), net, was as follows, in millions:
Three Months Ended March 31,
 20212020
Income from cash and cash investments
$— $1 
Equity investment income, net2 — 
Foreign currency transaction losses— (9)
Net periodic pension and post-retirement benefit cost
(11)(8)
Dividend income3 — 
Total other, net$(6)$(16)