Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities
Net income	$ 514	$ 550
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	729	689
Deferred income taxes and investment tax credits	89	90
Other non-cash operating activities and reconciling adjustments	(11)	47
Cash provided by (used in) changes in assets and liabilities
Accounts and notes receivable and accrued revenue	297	299
Inventories	(49)	(76)
Accounts payable and accrued rate refunds	(82)	(46)
Other current and non-current assets and liabilities	(92)	12
Net cash provided by operating activities	1,395	1,565
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under finance lease)	(1,570)	(1,572)
Increase in EnerBank notes receivable	(328)	(200)
Purchase of notes receivable by EnerBank	(307)	(87)
Proceeds from DB SERP investments	0	146
Proceeds from sale of transmission equipment	96	0
Cost to retire property and other investing activities	(103)	(102)
Net cash used in investing activities	(2,212)	(1,815)
Cash Flows from Financing Activities
Proceeds from issuance of debt	2,076	1,044
Retirement of debt	(1,170)	(705)
Increase in EnerBank certificates of deposit	622	288
Increase (decrease) in notes payable	(97)
Increase (decrease) in notes payable		110
Issuance of common stock	9	39
Payment of dividends on common and preferred stock	(326)	(305)
Other financing costs	(39)	(59)
Net cash provided by financing activities	1,075	412
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	258	162
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	175	204
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	433	366
Non-cash transactions
Capital expenditures not paid	135	159
Consumers Energy Company
Cash Flows from Operating Activities
Net income	537	574
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	716	681
Deferred income taxes and investment tax credits	37	40
Other non-cash operating activities and reconciling adjustments	(24)	33
Cash provided by (used in) changes in assets and liabilities
Accounts and notes receivable and accrued revenue	230	178
Inventories	(52)	(75)
Accounts payable and accrued rate refunds	(76)	(48)
Other current and non-current assets and liabilities	(117)	(128)
Net cash provided by operating activities	1,251	1,255
Cash Flows from Investing Activities
Capital expenditures (excludes assets placed under finance lease)	(1,559)	(1,339)
Proceeds from DB SERP investments	0	106
DB SERP investment in note receivable – related party	0	(106)
Proceeds from sale of transmission equipment	76	0
Cost to retire property and other investing activities	(100)	(96)
Net cash used in investing activities	(1,583)	(1,435)
Cash Flows from Financing Activities
Proceeds from issuance of debt	918	544
Retirement of debt	(528)	(330)
Increase (decrease) in notes payable	(97)
Increase (decrease) in notes payable		110
Stockholder contribution	675	250
Payment of dividends on common and preferred stock	(397)	(393)
Other financing costs	(11)	(28)
Net cash provided by financing activities	560	153
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	228	(27)
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	56	65
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	284	38
Non-cash transactions
Capital expenditures not paid	$ 123	$ 128