Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	May 28, 2017	May 29, 2016	May 31, 2015
Cash flows from operating activities:
Net income (loss)	$ 648.0	$ (665.9)	$ (240.8)
Income (loss) from discontinued operations	102.0	(794.4)	(692.1)
Income from continuing operations	546.0	128.5	451.3
Adjustments to reconcile income from continuing operations to net cash flows from operating activities:
Depreciation and amortization	268.0	278.5	284.6
Asset impairment charges	343.3	62.6	36.0
Gain on divestitures	(197.4)	0.0	0.0
Lease cancellation expense	0.0	55.6	0.0
Loss on extinguishment of debt	93.3	23.9	24.6
Earnings of affiliates in excess of distributions	(3.0)	(25.7)	(0.1)
Stock-settled share-based payments expense	36.1	41.8	33.3
Contributions to pension plans	(163.0)	(11.5)	(12.7)
Pension expense (benefit)	(21.4)	358.1	(15.7)
Other items	39.9	53.6	24.7
Change in operating assets and liabilities excluding effects of business acquisitions and dispositions:
Receivables	104.7	(156.8)	68.3
Inventories	123.3	66.1	(63.3)
Deferred income taxes and income taxes payable, net	52.3	(264.9)	45.2
Prepaid expenses and other current assets	15.0	10.8	(19.0)
Accounts payable	71.0	(118.3)	(15.5)
Accrued payroll	(52.4)	68.9	60.3
Other accrued liabilities	(114.9)	54.3	(62.3)
Net cash flows from operating activities - continuing operations	1,140.8	625.5	839.7
Net cash flows from operating activities - discontinued operations	34.7	633.7	664.9
Net cash flows from operating activities	1,175.5	1,259.2	1,504.6
Cash flows from investing activities:
Additions to property, plant and equipment	(242.1)	(277.5)	(236.5)
Sale of property, plant and equipment	13.2	35.7	0.0
Proceeds from divestitures	489.0	0.0	0.0
Purchase of business and intangible assets	(325.7)	(10.4)	(20.7)
Return of investment in equity method investee	0.0	0.0	391.4
Other items	0.0	0.3	(0.1)
Net cash flows from investing activities - continuing operations	(65.6)	(251.9)	134.1
Net cash flows from investing activities - discontinued operations	(123.7)	2,379.3	(175.7)
Net cash flows from investing activities	(189.3)	2,127.4	(41.6)
Cash flows from financing activities:
Net short-term borrowings	14.3	9.5	(137.4)
Issuance of long-term debt	0.0	0.0	550.0
Repayment of long-term debt	(1,064.5)	(2,523.2)	(1,491.4)
Payment of intangible asset financing arrangement	(14.9)	0.0	0.0
Repurchase of Conagra Brands, Inc. common shares	(1,000.0)	0.0	(50.0)
Sale of Conagra Brands, Inc. common shares	0.0	8.6	0.0
Cash dividends paid	(415.0)	(432.5)	(425.2)
Exercise of stock options and issuance of other stock awards	73.8	208.4	129.8
Other items	(1.9)	0.0	(2.3)
Net cash flows from financing activities - continuing operations	(2,408.2)	(2,729.2)	(1,426.5)
Net cash flows from financing activities - discontinued operations	839.1	(4.0)	(27.7)
Net cash flows from financing activities	(1,569.1)	(2,733.2)	(1,454.2)
Effect of exchange rate changes on cash and cash equivalents	(0.2)	(2.0)	(8.8)
Net change in cash and cash equivalents	(583.1)	651.4	0.0
Add: Cash balance included in assets held for sale and discontinued operations at beginning of period	36.4	49.0	90.6
Less: Cash balance included in assets held for sale and discontinued operations at end of period	0.0	36.4	49.0
Cash and cash equivalents at beginning of year	798.1	134.1	92.5
Cash and cash equivalents at end of year	$ 251.4	$ 798.1	$ 134.1