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Pension and Other Postretirement Benefits (Schedule of Accumulated Benefit Obligations in Excess of Plan Assets) (Details) - Pension Plan - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
U.S. Plans    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Projected benefit obligations $ 1,440 $ 1,371
Accumulated benefit obligations 1,397 1,327
Fair value of plan assets 1,131 1,012
Non-U.S. Plans    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Projected benefit obligations 399 363
Accumulated benefit obligations 383 329
Fair value of plan assets $ 187 $ 167