Employee Benefit Plans - Target Plan Asset Allocation (Details)	Jun. 30, 2020
Defined Benefit Plan Disclosure
Target Plan Asset Allocations	100.00%
U.S. large cap equity securities
Defined Benefit Plan Disclosure
Target Plan Asset Allocations	37.70%
U.S. small cap equity securities
Defined Benefit Plan Disclosure
Target Plan Asset Allocations	4.60%
International equity securities
Defined Benefit Plan Disclosure
Target Plan Asset Allocations	23.20%
Debt securities
Defined Benefit Plan Disclosure
Target Plan Asset Allocations	28.30%
Real estate
Defined Benefit Plan Disclosure
Target Plan Asset Allocations	6.20%