XML 74 R76.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Retirement Plans - Expected Benefit Payments (Detail)
$ in Millions
Dec. 31, 2019
USD ($)
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2020 $ 48.5
2021 49.9
2022 50.8
2023 52.1
2024 53.2
2025-2029 274.8
OPEB  
Defined Benefit Plan Disclosure [Line Items]  
2020 26.4
2021 24.9
2022 24.7
2023 24.5
2024 23.9
2025-2029 110.2
Estimated Subsidy Reimbursements  
Defined Benefit Plan Disclosure [Line Items]  
2020 1.8
2021 1.8
2022 1.8
2023 1.8
2024 1.8
2025-2029 $ 7.8