XML 82 R64.htm IDEA: XBRL DOCUMENT v3.22.1
Pension Benefits Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Retirement Benefits [Abstract]    
Defined Benefit Pension Plan, Postemployment Benefit Period 5 years  
Liability, Other Retirement Benefits $ 1 $ 1