XML 140 R106.htm IDEA: XBRL DOCUMENT v3.22.0.1
Retirement Plans (Schedule of Projected Benefit Obligation And Accumulated Benefit Obligation In Excess Of Plan Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Retirement Plans[Abstract]    
Projected benefit obligation $ 215 $ 246
Accumulated benefit obligation $ 215 $ 246