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Employee Benefits Schedule of Allocation of Plan Assets (Tables)
 12 Months Ended
Dec. 31, 2020
Retirement Benefits [Abstract]  
Schedule of Allocation of Plan Assets [Table Text Block] As of December 31, 2020, the weighted-average target and actual asset allocations relating to our domestic and foreign pension plans' assets are listed below.
December 31,
Asset Class2021 Target Allocation20202019
Alternative investments 1
23 %24 %25 %
Equity securities27 %27 %25 %
Fixed income securities19 %18 %19 %
Liability driven investments 2
15 %15 %14 %
Real estate9 %9 %9 %
Other7 %7 %8 %
Total100 %100 %100 %
1Alternative investments have the flexibility to dynamically invest across a broad range of asset classes including bonds, equity, cash, property and commodities.
2Liability driven investment strategies use government bonds as well as derivative instruments to hedge a portion of the impact of interest rates and inflation movements on the long-term liabilities.