XML 143 R110.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Pension Plans - Qualified Plan - Expected Future Contributions (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Pension Plan [Member] | Qualified Plan [Member]  
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]  
Expected contribution to defined benefit plan $ 1.7