CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	11 Months Ended	12 Months Ended
	Sep. 30, 2025	Oct. 31, 2024	Oct. 31, 2023
Cash flows from operating activities:
Net income	$ 863.1	$ 295.5	$ 379.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	236.9	261.3	230.6
Non-cash asset impairment charges	37.9	2.6	20.3
Non-cash pension settlement charges	0.0	0.0	3.5
Gain on disposals of properties, plants and equipment, net	(7.5)	(8.8)	(2.5)
Gain on disposals of businesses, net	(1,094.9)	(46.0)	(64.0)
Unrealized foreign exchange loss	1.8	10.0	12.7
Deferred income tax benefit	(28.3)	(86.2)	(28.7)
Non-cash lease expense	50.8	46.6	38.0
Other, net	(0.7)	3.1	2.2
Increase (decrease) in cash from changes in certain assets and liabilities, net of impacts from acquisitions:
Trade accounts receivable	1.9	(43.4)	130.3
Inventories	(10.5)	(26.4)	101.0
Accounts payable	(43.0)	18.9	(79.8)
Restructuring reserves	16.8	(11.9)	4.4
Operating leases	(54.8)	(48.1)	(37.3)
Pension and post-retirement benefit liabilities	(6.8)	(11.4)	(26.9)
Other, net	95.9	0.2	(33.4)
Net cash provided by operating activities	58.6	356.0	649.5
Cash flows from investing activities:
Acquisitions of companies, net of cash acquired	(4.6)	(568.8)	(542.4)
Purchases of properties, plants and equipment	(143.8)	(186.5)	(213.6)
Purchases of and investments in timber properties	(2.6)	(5.2)	(6.0)
Proceeds from the sale of properties, plants, equipment and other assets	29.6	14.9	8.6
Proceeds from the sale of businesses	1,780.4	89.0	105.3
Proceeds from hedging derivatives	22.5	0.0	0.0
Payments for deferred purchase price of acquisitions	(1.9)	(1.7)	(22.1)
Other	3.6	0.0	0.0
Net cash provided by (used in) investing activities	1,683.2	(658.3)	(670.2)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	1,715.6	2,491.2	2,285.6
Payments on long-term debt	(3,169.5)	(1,994.0)	(2,028.6)
Payments on short-term borrowings, net	(6.2)	(12.3)	(0.7)
Proceeds from trade accounts receivable credit facility	469.0	348.9	180.2
Payments on trade accounts receivable credit facility	(560.1)	(344.4)	(145.8)
Dividends paid to Greif, Inc. shareholders	(101.1)	(121.0)	(116.5)
Dividends paid to noncontrolling interests	(22.7)	(25.7)	(14.2)
Payments for share repurchases	0.0	0.0	(63.9)
Tax withholding payments for stock-based awards	(7.4)	(10.6)	(13.7)
Purchases of redeemable and mandatorily redeemable noncontrolling interest	(38.7)	0.0	(7.3)
Other, net	(6.4)	(7.8)	(5.4)
Net cash provided by (used in) financing activities	(1,727.5)	324.3	69.7
Effects of exchange rates on cash	44.7	(5.2)	(15.2)
Net increase in cash and cash equivalents	59.0	16.8	33.8
Cash and cash equivalents at beginning of year	197.7	180.9	147.1
Cash and cash equivalents at end of year	256.7	197.7	180.9
Non-cash transactions:
Capital expenditures included in accounts payable	30.4	16.7	29.1
Schedule of interest and income taxes paid:
Cash payments for interest expense	137.4	157.1	112.9
Cash payments for taxes	$ 434.3	$ 107.5	$ 155.2