Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income	$ 94	$ 140	$ 307	$ 381
Retirement Benefits Liability
Amortization of net actuarial loss, net of tax of $- for all periods	1	1	2	2
Amortization of prior service credit	0	(1)	(1)	(1)
Investments
Unrealized loss on investments	0	0	0	(1)
Derivatives
Unrealized loss on derivative instruments, net of tax of $(1), $-, $(1), and $-	(2)		(3)
Unrealized loss on derivative instruments, net of tax of $(1), $-, $(1), and $-		0		0
Other Comprehensive Loss	(1)	0	(2)	0
Comprehensive Income	93	140	305	381
Comprehensive Income Attributable to Noncontrolling Interests	1	1	1	1
Comprehensive Income	92	139	304	380
Consumers Energy Company
Net income	98	152	324	394
Retirement Benefits Liability
Amortization of net actuarial loss, net of tax of $- for all periods	1	0	1	1
Investments
Unrealized loss on investments	0	0	0	(1)
Derivatives
Other Comprehensive Loss	1	0	1	0
Comprehensive Income	$ 99	$ 152
Comprehensive Income			$ 325	$ 394