XML 137 R107.htm IDEA: XBRL DOCUMENT v3.22.0.1
Retirement Benefits (Schedule Of Expected Benefit Payments) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
DB Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
2022 $ 185
2023 181
2024 178
2025 180
2026 178
2027-2031 876
DB Pension Plans | Consumers Energy Company  
Defined Benefit Plan Disclosure [Line Items]  
2022 175
2023 171
2024 169
2025 170
2026 169
2027-2031 830
DB SERP  
Defined Benefit Plan Disclosure [Line Items]  
2022 10
2023 10
2024 10
2025 10
2026 9
2027-2031 45
DB SERP | Consumers Energy Company  
Defined Benefit Plan Disclosure [Line Items]  
2022 7
2023 7
2024 7
2025 7
2026 6
2027-2031 31
OPEB Plan  
Defined Benefit Plan Disclosure [Line Items]  
2022 52
2023 54
2024 56
2025 58
2026 59
2027-2031 308
OPEB Plan | Consumers Energy Company  
Defined Benefit Plan Disclosure [Line Items]  
2022 49
2023 52
2024 54
2025 55
2026 56
2027-2031 $ 294