Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income	$ 210	$ 207	$ 590	$ 514
Retirement Benefits Liability
Net loss arising during the period, net of tax of $(2), $-, $(2), and $-	(5)	0	(5)	0
Settlement arising during the period, net of tax of $- for all periods	1	0	1	0
Amortization of net actuarial loss, net of tax	1	0	3	2
Amortization of prior service credit, net of tax of $- for all periods	0	0	(1)	(1)
Derivatives
Unrealized loss on derivative instruments, net of tax of $-, $-, $(1), and $(1)	(1)	0	(5)	(3)
Reclassification adjustments included in net income	1	0	1	0
Other Comprehensive Loss	(3)	0	(6)	(2)
Comprehensive Income	207	207	584	512
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	(8)	0	(7)	1
Comprehensive Income Attributable to CMS Energy	215	207	591	511
Consumers Energy Company
Net income	230	213	625	537
Retirement Benefits Liability
Amortization of net actuarial loss, net of tax	1	0	1	1
Derivatives
Other Comprehensive Loss	1	0	1	1
Comprehensive Income	$ 231	$ 213	$ 626	$ 538