Air Products and Chemicals (APD) 10-K 21 Nov 16 2016 FY Annual report Financial data

Document Entity Information

Document Entity Information - USD ($) $ in Billions	12 Months Ended
	Sep. 30, 2016	Oct. 31, 2016	Mar. 31, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--09-30
Entity Registrant Name	AIR PRODUCTS & CHEMICALS INC /DE/
Entity Central Index Key	2,969
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 31
Entity Common Stock, Shares Outstanding		217,375,097

Consolidated Income Statements

Consolidated Income Statements - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Consolidated Income Statements [Abstract]
Sales	$ 9,524.4		$ 9,894.9		$ 10,439
Cost of sales	6,402.7		6,939		7,629.9
Selling and administrative	849.3		939.3		1,054.7
Research and development	132		137.1		139.8
Business separation costs	52.2	[1]	7.5	[1]	0
Business restructuring and cost reduction actions	33.9	[2]	207.7	[2]	12.7
Pension settlement loss	6.4	[3]	21.2	[3]	5.5
Goodwill and intangible asset impairment charge	0		0		310.1
Gain on previously held equity interest	0		17.9		0
Other income (expense), net	58.1		47.3		52.8
Operating Income	2,106		1,708.3		1,339.1
Equity affiliates' income	148.6		154.5		151.4
Interest expense	115.5		103.5		125.1
Loss on extinguishment of debt	6.9	[4]	16.6	[4]	0
Income from Continuing Operations before Taxes	2,132.2		1,742.7		1,365.4
Income tax provision	586.5	[5]	418.3		369.4
Income from Continuing Operations	1,545.7		1,324.4		996
Income (loss) from Discontinued Operations, net of tax	(884.2)		(6.8)		(2.9)
Net Income	661.5		1,317.6		993.1
Less: Net Income Attributable to Noncontrolling Interests	30.4		39.7		1.4
Net Income Attributable to Air Products	631.1		1,277.9		991.7
Net Income Attributable to Air Products
Income from continuing operations	1,515.3		1,284.7		994.6
Income (loss) from discontinued operations	(884.2)		(6.8)		(2.9)
Net Income Attributable to Air Products	$ 631.1		$ 1,277.9		$ 991.7
Basic Earnings Per Common Share Attributable to Air Products
Income from continuing operations	$ 7		$ 5.98		$ 4.68
Income (loss) from discontinued operations	(4.08)		(0.03)		(0.02)
Net Income Attributable to Air Products	2.92		5.95		4.66
Diluted Earnings Per Common Share Attributable to Air Products
Income from continuing operations	6.94		5.91		4.62
Income (loss) from discontinued operations	(4.05)		(0.03)		(0.01)
Net Income Attributable to Air Products	$ 2.89		$ 5.88		$ 4.61
Weighted Average Common Shares Outstanding - Basic (in millions)	216.4		214.9		212.7
Weighted Average Common Shares Outstanding - Diluted (in millions)	218.3		217.3		215.2
[1]	For additional information, see Note 3, Materials Technologies Separation.
[2]	For additional information, see Note 5, Business Restructuring and Cost Reduction Actions.
[3]	For additional information, see Note 16, Retirement Benefits.
[4]	For additional information, see Note 15, Debt.
[5]	Includes income tax expense for tax costs associated with business separation. For additional information, see Note 3, Materials Technologies Separation.

Consolidated Comprehensive Inco

Consolidated Comprehensive Income Statement - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Other Comprehensive Income (Loss), net of tax [Abstract]
Net Income	$ 661.5	$ 1,317.6	$ 993.1
Translation adjustments, net of tax	9.9	(699.3)	(213.1)
Net gain (loss) on derivatives, net of tax	13.7	(35)	(15.2)
Pension and postretirement benefits, net of tax	(335.1)	(278.5)	(74.2)
Reclassification Adjustments [Abstract]
Currency translation adjustment	2.7	0	0
Derivatives, net of tax	(36)	20.8	(9.1)
Pension and postretirement benefits, net of tax	87.2	97	84.7
Total Other Comprehensive Income (Loss)	(257.6)	(895)	(226.9)
Comprehensive Income	403.9	422.6	766.2
Net income attributable to noncontrolling interests	30.4	39.7	1.4
Other Comprehensive Income (Loss) Attributable to Noncontrolling Interests	4.8	(11)	(5.6)
Comprehensive Income Attributable to Air Products	$ 368.7	$ 393.9	$ 770.4

Consolidated Comprehensive Inc4

Consolidated Comprehensive Income Statements (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Consolidated Comprehensive Income Statements [Abstract]
Tax effect on translation adjustments	$ (19.8)	$ 45.2	$ 36.5
Tax effect on net gain (loss) on derivatives	9.1	(16)	(13.6)
Tax effect on pension and postretirement benefits	(157.4)	(148.5)	(28)
Tax effect on derivatives reclassification adjustments	(9.4)	7	(1.9)
Tax effect on pension and postretirement benefits reclassification adjustments	$ 43	$ 47.7	$ 40

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions		Sep. 30, 2016	Sep. 30, 2015
Current Assets
Cash and cash items		$ 1,501.3	$ 206.4
Trade receivables, net		1,439.9	1,406.2
Inventories		619.9	657.8
Contracts in progress, less progress billings		81.6	110.8
Prepaid expenses		99.6	67
Other receivables and current assets		555.6	343.5
Current assets of discontinued operations		19.4	1.8
Total Current Assets		4,317.3	2,793.5
Investment in net assets of and advances to equity affiliates		1,288.1	1,265.7
Plant and Equipment, net	[1]	8,852.7	8,745.1
Goodwill, net		1,150.2	1,131.3
Intangible assets, net		488	508.3
Noncurrent capital lease receivables		1,221.7	1,350.2
Other noncurrent assets		737.3	648.6
Noncurrent assets of discontinued operations		0	891.8
Total Noncurrent Assets		13,738	14,541
Total Assets		18,055.3	17,334.5
Current Liabilities
Payables and accrued liabilities		1,810.6	1,641.7
Accrued income taxes		146.6	55.8
Short-term borrowings		935.8	1,494.3
Current portion of long-term debt		371.3	435.6
Current liabilities of discontinued operations		19	17
Total Current Liabilities		3,283.3	3,644.4
Long-term debt		4,918.1	3,949.1
Other noncurrent liabilities		1,873.4	1,554
Deferred income taxes		767.1	803.4
Noncurrent liabilities of discontinued operations		0	2.5
Total Noncurrent Liabilities		7,558.6	6,309
Total Liabilities		10,841.9	9,953.4
Commitments and Contingencies - See Note 17
Redeemable Noncontrolling Interest			0
Air Products Shareholders' Equity
Common stock		249.4	249.4
Capital in excess of par value		970	904.7
Retained earnings		10,475.5	10,580.4
Accumulated other comprehensive loss		(2,388.3)	(2,125.9)
Treasury stock, at cost		(2,227)	(2,359.6)
Total Air Products Shareholders' Equity		7,079.6	7,249
Noncontrolling Interests		133.8	132.1
Total Equity		7,213.4	7,381.1
Total Liabilities and Equity		$ 18,055.3	$ 17,334.5
[1]	Long-lived assets include plant and equipment, net.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2016	Sep. 30, 2015
Air Products Shareholder's Equity [Abstract]
Common stock, par value	$ 1	$ 1
Common stock, issued shares	249,455,584	249,455,584
Treasury stock, shares	32,104,759	34,096,471

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Operating Activities
Net Income	$ 661.5		$ 1,317.6		$ 993.1
Less: Net income attributable to noncontrolling interests	30.4		39.7		1.4
Net Income Attributable to Air Products	631.1		1,277.9		991.7
(Income) loss from discontinued operations	884.2		6.8		2.9
Income from continuing operations attributable to Air Products	1,515.3		1,284.7		994.6
Adjustments to reconcile income to cash provided by operating activities:
Depreciation and amortization	925.9		936.4		956.9
Deferred income taxes	62.9		2.9		125.5
Loss on extinguishment of debt	6.9	[1]	16.6	[1]	0
Gain on previously held equity interest	0		(17.9)		0
Undistributed earnings of unconsolidated affiliates	(51.8)		(102.6)		(76)
(Gain) Loss on sale of assets and investments	(10)		(30.1)		4.3
Share-based compensation	37.6		45.7		44
Noncurrent capital lease receivables	85.5		(9.5)		20
Goodwill and intangible asset impairment charge	0		0		310.1
Write-down of long-lived assets associated with restructuring	0		47.4		0
Other adjustments	155.2		48.1		60.7
Working capital changes that provided (used) cash, excluding effects of acquisitions and divestitures:
Trade receivables	(61.7)		(29.7)		(2.7)
Inventories	32.9		8.3		(23.5)
Contracts in progress, less progress billings	21.3		36.4		(5.6)
Other receivables	(12.2)		57.6		(33)
Payables and accrued liabilities	57		156.2		(237.9)
Other working capital	(57.4)		(4.1)		52.7
Cash Provided by Operating Activities	2,707.4		2,446.4		2,190.1
Investing Activities
Additions to plant and equipment	(1,055.8)		(1,265.6)		(1,362.7)
Acquisitions, less cash acquired	0		(34.5)		0
Investment in unconsolidated affiliates	0		(4.3)
Proceeds from collection of advance to affiliate					2
Proceeds from sale of assets and investments	85.5		55.3		45.6
Other investing activities	(1.7)		(1.4)		(1.4)
Cash Used for Investing Activities	(972)		(1,250.5)		(1,316.5)
Financing Activities
Long-term debt proceeds	960.4		340.3		463.4
Payments on long-term debt	(485)		(708.7)		(608.6)
Net increase (decrease) in commercial paper and short-term borrowings	(144.2)		284		148.7
Debt issuance costs	(11.7)		(2.2)		(2.4)
Dividends paid to shareholders	(721.2)		(677.5)		(627.7)
Proceeds from stock option exercises	141.3		121.3		141.6
Excess tax benefit from share-based compensation	33.2		31.9		28.3
Payment for subsidiary shares to noncontrolling interests	0		(278.4)		(0.5)
Other financing activities	(43.9)		(56.1)		(47.1)
Cash Provided By (Used for) Financing Activities	(271.1)		(945.4)		(504.3)
Discontinued Operations
Cash provided by (used for) operating activities	(79.9)		(8.6)		(3)
Cash provided by (used for) investing activities	(97)		(349.2)		(311.7)
Cash provided by (used for) financing activities	0		0		(157.1)
Cash Provided by (Used for) Discontinued Operations	(176.9)		(357.8)		(471.8)
Effect of Exchange Rate Changes on Cash	7.5		(22.9)		(11.3)
Increase (Decrease) in Cash and Cash Items	1,294.9		(130.2)		(113.8)
Cash and Cash Items - Beginning of Year	206.4		336.6		450.4
Cash and Cash Items - End of Period	1,501.3		206.4		336.6
Less: Cash and Cash Items - Discontinued Operations	0		0		0
Cash and Cash Items - Continuing Operations	$ 1,501.3		$ 206.4		$ 336.6
[1]	For additional information, see Note 15, Debt.

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Capital in Excess of Par [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Air Products Shareholders' Equity [Member]	Noncontrolling Interests [Member]
Balance, beginning of period at Sep. 30, 2013	$ 7,198.9	$ 249.4	$ 799.2	$ 9,646.4	$ (1,020.6)	$ (2,632.3)	$ 7,042.1	$ 156.8
Net income	1,020.5			991.7			991.7	28.8
Other comprehensive income (loss)	(226.9)				(221.3)		(221.3)	(5.6)
Cash dividends	(641.8)			(641.8)			(641.8)
Share-based compensation expense	44		44				44
Issuance of treasury shares for stock option and award plans	125.4		(30)			155.4	125.4
Tax benefit of stock option and award plans	29.3		29.3				29.3
Dividends to noncontrolling interests	(24.4)							(24.4)
Purchase of noncontrolling interests	(0.5)		(0.5)				(0.5)
Other	(3.1)			(3.1)			(3.1)
Balance, end of period at Sep. 30, 2014	7,521.4	249.4	842	9,993.2	(1,241.9)	(2,476.9)	7,365.8	155.6
Net income	1,306.1			1,277.9			1,277.9	28.2
Other comprehensive income (loss)	(895)				(884)		(884)	(11)
Cash dividends	(687.9)			(687.9)			(687.9)
Share-based compensation expense	43.7		43.7				43.7
Issuance of treasury shares for stock option and award plans	102.2		(15.1)			117.3	102.2
Tax benefit of stock option and award plans	32		32				32
Dividends to noncontrolling interests	(38)							(38)
Purchase of noncontrolling interests	(0.5)		(0.3)				(0.3)	(0.2)
Other	(2.9)		2.4	(2.8)			(0.4)	(2.5)
Balance, end of period at Sep. 30, 2015	7,381.1	249.4	904.7	10,580.4	(2,125.9)	(2,359.6)	7,249	132.1
Net income	661.5			631.1			631.1	30.4
Other comprehensive income (loss)	(257.6)				(262.4)		(262.4)	4.8
Cash dividends	(733.7)			(733.7)			(733.7)
Share-based compensation expense	37.6		37.6				37.6
Issuance of treasury shares for stock option and award plans	127.1		(5.5)			132.6	127.1
Tax benefit of stock option and award plans	33.2		33.2				33.2
Dividends to noncontrolling interests	(33.6)							(33.6)
Other	(2.2)			(2.3)			(2.3)	0.1
Balance, end of period at Sep. 30, 2016	$ 7,213.4	$ 249.4	$ 970	$ 10,475.5	$ (2,388.3)	$ (2,227)	$ 7,079.6	$ 133.8

Consolidated Statements of Equ9

Consolidated Statements of Equity (Parenthetical) - $ / shares	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Statement of Stockholders' Equity [Abstract]
Dividends per share	$ 0.86	$ 0.86	$ 0.86	$ 0.81	$ 0.81	$ 0.81	$ 0.81	$ 0.77	$ 3.39	$ 3.2	$ 3.02

Major Accounting Policies

Major Accounting Policies	12 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Major Accounting Policies	1. MAJOR ACCOUNTING POLICIES Basis of Presentation and Consolidation Principles The accompanying consolidated financial statements of Air Products and Chemicals, Inc. were prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the accounts of Air Products and Chemicals, Inc. and those of its controlled subsidiari es (“we,” “our,” “us,” the “Company,” “Air Products,” or “registrant”), which are generally majority owned. Intercompany transactions and balances are eliminated in consolidation. We consolidate all entities that we control. The general condition for cont rol is ownership of a majority of the voting interests of an entity. Control may also exist in arrangements where we are the primary beneficiary of a variable interest entity (VIE). An entity that has both the power to direct the activities that most signi ficantly impact the economic performance of a VIE and the obligation to absorb the losses or receive the benefits significant to the VIE is considered the primary beneficiary of that entity. We have determined that we are not a primary beneficiary in any m aterial VIE. Certain prior year information has been reclassified to conform to the 2016 presentation. Estimates and Assumptions The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumpti ons that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Revenue Recognition Revenue from product sales is recognized as risk and title to the product transfer to the customer ( which generally occurs at the time shipment is made), the sales price is fixed or determinable, and collectability is reasonably assured. Sales returns and allowances are not a business practice in the industry. Revenue from equipment sale contracts is re corded primarily using the percentage-of-completion method. Under this method, revenue from the sale of major equipment, such as liquefied natural gas (LNG) heat exchangers and large air separation units, is recognized based on labor hours or costs incurre d to date compared with total estimated labor hours or costs to be incurred. When adjustments in estimated total contract revenues or estimated total costs or labor hours are required, any changes in the estimated profit from prior estimates are recognized in the current period for the inception-to-date effect of such change. Changes in estimates on projects accounted for under the p ercentage -of -completion method favorably impacted operating income by approximately $ 20 in fiscal year 2016, primarily during the fourth quarter . Our changes in estimates would not have significantly impacted amounts recorded in prior years. Changes in estimates during fiscal years 2015 and 2014 were not significant. Certain contracts associated with facilities that are built to provide product to a specific customer are required to be accounted for as leases. In cases where operating lease treatment is necessary, there is no difference in revenue recognition over the life of the contract as compared to accounting for the contrac t as product sales. In cases where capital lease treatment is necessary, the timing of revenue and expense recognition is impacted. Revenue and expense are recognized up front for the sale of equipment component of the contract as compared to revenue recog nition over the life of the arrangement under contracts not qualifying as capital leases. Additionally, a portion of the revenue representing interest income from the financing component of the lease receivable is reflected as sales over the life of the co ntract. Allowances for credit losses associated with capital lease receivables are recorded using the specific identification method. As of 30 September 2016 and 2015 , the credit quality of capital lease receivables did not require an allowance for credit losses. If an arrangement involves multiple deliverables, the delivered items are considered separate units of accounting if the items have value on a stand-alone basis. Revenues are allocated to each deliverable based upon relative selling prices derived from company specific evidence. Amounts billed for shipping and handling fees are classified as sales in the consolidated income statements. Amounts billed for sales and use taxes, value-added taxes, and certain excise and other specific transac tional taxes imposed on revenue-producing transactions are presented on a net basis and excluded from sales in the consolidated income statements. We record a liability until remitted to the respective taxing authority. Cost of Sales Cost of sales predom inantly represents the cost of tangible products sold. These costs include labor, raw materials, plant engineering, power, depreciation, production supplies and materials packaging costs, and maintenance costs. Costs incurred for shipping and handling are also included in cost of sales. Depreciation Depreciation is recorded using the straight-line method, which deducts equal amounts of the cost of each asset from earnings every year over its expected economic useful life. The principal lives for major cla sses of plant and equipment are summarized in Note 9, Plant and Equipment, net. Selling and Administrative The principal component s of selli ng and administrative expenses are compensation, advertising , and promotional costs . Postemployment Bene fits We provide termination benefits to employees as part of ongoing benefit arrangements and record a liability for termination benefits when probable and estimable. These criteria are met when management, with the appropriate level of authority, approve s and commits to its plan of action for termination; the plan identifies the employees to be terminated and their related benefits; and the plan is to be completed within one year. We do not provide one-time benefit arrangements of significance. Fair Valu e Measurements We are required to measure certain assets and liabilities at fair value, either upon initial measurement or for subsequent accounting or reporting. For example, fair value is used in the initial measurement of net assets acquired in a business combination; on a recurring basis in the measurement of derivative financial instruments; and on a nonrecurring basis when long-lived assets are written down to fair value when held for sale or determined to be impaired. Refer to Note 14, Fair Value Measurements, for information on the methods and assumptions used in our fair value measurements . Financial Instruments We address certain financial exposures through a c ontrolled program of risk management that includes the use of derivative financial instruments. The types of derivative financial instruments permitted for such risk management programs are specified in policies set by management. Refer to Note 13, Fi nancial Instruments, for further detail on the types and use of derivative instruments into which we enter. Major financial institutions are counterparties to all of these derivative contracts. We have established counterparty credit guidelines and generally en ter into transactions with financial institutions of investment grade or better. Management believes the risk of incurring losses related to credit risk is remote, and any losses would be immaterial to the consolidated financial results, financial conditio n, or liquidity. We recognize derivatives on the balance sheet at fair value. On the date the derivative instrument is entered into, we generally designate the derivative as either (1) a hedge of a forecasted transaction or of the variability of cash flow s to be received or paid related to a recognized asset or liability (cash flow hedge), (2) a hedge of a net investment in a foreign operation (net investment hedge), or (3) a hedge of the fair value of a recognized asset or liability (fair value hedge). T he following details the accounting treatment of our cash flow, fair value, net investment, and non-designated hedges: Changes in the fair value of a derivative that is designated as and meets the cash flow hedge criteria are recorded in Accumulated other comprehensive loss (AOC L ) to the extent effective and then recognized in earnings when the hedged items affect earnings. Changes in the fair value of a derivative that is designated as and meets all the required criteria for a fair value hedge, along wit h the gain or loss on the hedged asset or liability that is attributable to the hedged risk, are recorded in current period earnings. Changes in the fair value of a derivative and foreign currency debt that are designated as and meet all the required crit eria for a hedge of a net investment are recorded as transla tion adjustments in AOCL . Changes in the fair value of a derivative that is not designated as a hedge are recorded immediately in earnings. We formally document the relationships between hedging instruments and hedged items, as well as our risk management objective and strategy for undertaking various hedge transactions. This process includes relating derivatives that are designated as fair value or cash flow hedges to specific assets and liabili ties on the balance sheet or to specific firm commitments or forecasted transactions. We also formally assess, at the inception of the hedge and on an ongoing basis, whether derivatives are highly effective in offsetting changes in fair values or cash flow s of the hedged item. If it is determined that a derivative is not highly effective as a hedge, or if a derivative ceases to be a highly effective hedge, we will discontinue hedge accounting with respect to that derivative prospectively. Foreign Currency Since we do business in many foreign countries, fluctuations in currency exchange rates affect our financial position and results of operations. In most of our foreign operations, the local currency is considered the functional currency. Foreign subsidiaries translate their assets and liabilities into U.S. dollars at current exchange rates in effect at the end of the fiscal period. The gains or losses that result from this process are shown as translation adjustments in AOCI in the equity section of the balance sheet. The revenue and expense accounts of foreign subsidiaries are translated into U.S. dollars at the average exchange rates that prevail during the period. Therefore, the U.S. dollar value of these items on the income statement fluctuate s from period to period, depending on the value of the dollar against foreign currencies. Some transactions are made in currencies different from an entity’s functional currency. Gains and losses from these foreign currency transactions are generally inclu ded in other income (expense), net on our consolidated income statements as they occur. Environmental Expenditures Accruals for environmental loss contingencies are recorded when it is probable that a liability has been incurred and the amount of loss ca n be reasonably estimated. Remediation costs are capitalized if the costs improve the Company’s property as compared with the condition of the property when originally constructed or acquired, or if the costs prevent environmental contamination from future operations. We expense environmental costs related to existing conditions resulting from past or current operations and from which no current or future benefit is discernible. The amounts charged to income from continuing operations related to environment al matters totaled $ 27.0 in fiscal 2016 , $ 28.3 in 2015 , and $ 35.1 in 2014 . The measurement of environmental liabilities is based on an evaluation of currently available information with respect to each indi vidual site and considers factors such as existing technology, presently enacted laws and regulations, and prior experience in remediation of contaminated sites. An environmental liability related to cleanup of a contaminated site might include, for exampl e, a provision for one or more of the following types of costs: site investigation and testing costs, cleanup costs, costs related to soil and water contamination resulting from tank ruptures, post-remediation monitoring costs, and outside legal fees. Thes e liabilities include costs related to other potentially responsible parties to the extent that we have reason to believe such parties will not fully pay their proportionate share. They do not take into account any claims for recoveries from insurance or o ther parties and are not discounted. As assessments and remediation progress at individual sites, the amount of projected cost is reviewed, and the liability is adjusted to reflect additional technical and legal information that becomes available. Managem ent has an established process in place to identify and monitor the Company’s environmental exposures. An environmental accrual analysis is prepared and maintained that lists all environmental loss contingencies, even where an accrual has not been establis hed. This analysis assists in monitoring the Company’s overall environmental exposure and serves as a tool to facilitate ongoing communication among the Company’s technical experts, environmental managers, environmental lawyers, and financial management to ensure that required accruals are recorded and potential exposures disclosed. Given inherent uncertainties in evaluating environmental exposures, actual costs to be incurred at identified sites in future periods may vary from the estimates. Refer to Note 17, Commitments and Contingencies, for additional information on the Company’s environmental loss contingencies. The accruals for environmental liabilities are reflected in the consolidated balance sheets, primarily as part of other noncurrent liabi lities. Litigation In the normal course of business, we are involved in legal proceedings. We accrue a liability for such matters when it is probable that a liability has been incurred and the amount can be reasonably estimated. When only a range of possible loss can be established, the most probable amount in the range is accrued. If no amount within this range is a better estimate than any other amount within the range, the minimum amount in the range is accrued. The accrual for a litigation loss contingency includes estimates of potential damages and other directly related costs expected to be incurred. Refer to Note 17, Commitments and Contingencies, for additional information on our cu rrent legal proceedings. Share-Based Compensation We have various share-based compensation programs, which include deferred stock units, stock options, and restricted stock. We expense the grant-date fair value of these awards over the vesting period dur ing which employees perform related services. Expense recognition is accelerated for retirement-eligible individuals who would meet the requirements for vesting of awards upon their retirement. We utilize a Black Scholes model to value stock option awards . The grant-date fair value of the deferred stock units tied to a market condition is estimated using a Monte Carlo simulation model . Income Taxes We account for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the tax effects of temporary differences between the financial reporting and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to be recovered or settled . A principal temporary difference results from the excess of tax depreciation over book depreciation because accelerated methods of depreciation and shorter useful lives are used for income tax purposes. The cumulative impact of a change in tax rates or r egulations is included in income tax expense in the period that includes the enactment date. We recognize deferred tax assets net of existing valuation allowance to the extent we believe that these assets are more likely than not to be realized considering all available evidence. A tax benefit for an uncertain tax position is recognized when it is more likely than not that the position will be sustained upon examination based on its technical merits. This position is measured as the largest amount of tax be nefit that is greater than 50% likely of being realized. Interest and penalties related to unrecognized tax benefits are recognized as a component of income tax expense. For additional information regarding our income taxes, refer to Note 23, Income T axes. Cash and Cash Items Cash and cash items include cash, time deposits, and certificates of deposit acquired with an original maturity of three months or less. Trade Receivables, net Trade receivables comprise amounts owed to us through our operatin g activities and are presented net of allowances for doubtful accounts. The allowances for doubtful accounts represent estimated uncollectible receivables associated with potential customer defaults on contractual obligations. A provision for customer defa ults is made on a general formula basis when it is determined that the risk of some default is probable and estimable but cannot yet be associated with specific customers. The assessment of the likelihood of customer defaults is based on various factors, i ncluding the length of time the receivables are past due, historical experience, and existing economic conditions. The allowance also includes amounts for certain customers where a risk of default has been specifically identified, considering factors such as the financial condition of the customer and customer disputes over contractual terms and conditions. Allowance for doubtful accounts were $ 56.8 and $ 48.5 as of fiscal year end 30 September 2016 and 2015 , respectively. Provisions to the allowance for doubtful accounts charged against income were $ 22.8 , $ 26.3 and $ 16.4 in 2016 , 2015 , and 2014 , respectively . Inventories Inventories are stated at the lower of cost or market. We write down our inventories for est imated obsolescence or unmarketable inventory based upon assumptions about future demand and market conditions. We utilize the last-in, first-out (LIFO) method for determining the cost of inventories in t he United States for the Industrial Gases and the Materials Technologies segments. Inventories for these segments outside of the United States are accounted for on the first-in, first-out (FIFO) method, as the LIFO method is not generally permitted in the foreign jurisdictions where these segments operate. The invento ries of the Industrial Gases – Global and the Corporate and other segment s on a worldwide basis, as well as all other inventories, are accounted for on the FIFO basis. At the business segment level, inventories are recorded at FIFO and the LIFO pool adjustments are not alloca ted to the business segments. Equity Investments The equity method of accounting is used when we exercise significant influence but do not have operating control, generally assumed to be 20% –50% ownership. Under the equity method, original investments are recorded at cost and adjusted by our share of undistributed earnings or losses of these companies. Equity investments are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the in vestment may not be recoverable. Plant and Equipment Plant and equipment is stated at cost less accumulated depreciation. Construction costs, labor, and applicable overhead related to installations are capitalized. Expenditures for additions and improvements that extend t he lives or increase the capacity of plant assets are capitalized. The costs of maintenance and repairs of plant and equipment are charged to expense as incurred. Fully depreciated assets are retained in the gross plant and equipment and accumulated depre ciation accounts until they are removed from service. In the case of disposals, assets and related depreciation are removed from the accounts, and the net amounts, less proceeds from disposal, are included in income . Refer to Note 9, Plant and Equipm ent, net, for further detail. Computer Software We capitalize costs incurred to purchase or develop software for internal use. Capitalized costs include purchased computer software packages, payments to vendors/consultants for development and implementat ion or modification to a purchased package to meet our requirements, payroll and related costs for employees directly involved in development, and interest incurred while software is being developed. Capitalized computer software costs are included in the balance sheet classification plant and equipment, net and depreciated over the estimated useful life of the software, generally a period of three to ten years. Capitalized Interest As we build new plant and equipment, we include in the cost of these asse ts a portion of the interest payments we make during the year. The amount of capitalized interest was $ 32.9 , $ 49.1 , and $ 33.0 in 2016 , 2015 , and 2014 , respectively. Impairment of Long-Lived Assets Long-lived assets ar e grouped for impairment testing at the lowest level for which there are identifiable cash flows that are largely independent of the cash flows of other assets and liabilities and are evaluated for impairment whenever events or changes in circumstances ind icate that the carrying amount of an asset group may not be recoverable. We assess recoverability by comparing the carrying amount of the asset group to estimated undiscounted future cash flows expected to be generated by the asset group. If an asset group is considered impaired, the impairment loss to be recognized is measured as the amount by which the asset group’s carrying amount exceeds its fair value. Long-lived assets to be sold are reported at the lower of carrying amount or fair value less cost to sell. Asset Retirement Obligations The fair value of a liability for an asset retirement obligation is recognized in the period in which it is incurred. The fair value of the liability is measured using discounted estimated cash flows and is adjusted to its present value in subsequent periods as accretion expense is recorded. The corresponding asset retirement costs are capitalized as part of the carrying amount of the related long-lived asset and depreciated over the asset’s useful life. Our asset retire ment obligations are primarily associated with Industrial Gases on-site long-term supply contracts, under which we have built a facility on land owned by the customer and are obligated to remove the facility at the end of the contract term. Our asset retirement obligations totaled $ 1 19.9 and $ 109.4 a t 30 September 2016 and 2015 , respectively. Goodwill Business combinations are accounted for using the acquisition method. The purchase price is allocated to the assets acquired and liabi lities assumed based on their estimated fair market values. Any excess purchase price over the fair market value of the net assets acquired, including identified intangibles, is recorded as goodwill. Preliminary purchase price allocations are made at the d ate of acquisition and finalized when information needed to affirm underlying estimates is obtained, within a maximum allocation period of one year. Goodwill is subject to impairment testing at least annually. In addition, goodwill is tested more frequent ly if a change in circumstances or the occurrence of events indicates that potential impairment exists. Refer to Note 10, Goodwill, for further detail. Intangible Assets Intangible assets with determinable lives primarily consist of customer relati onships, purchased patents and technology, and land use rights. The cost of intangible assets with determinable lives is amortized on a straight-line basis over the estimated period of economic benefit. No residual value is estimated for these intangible a ssets. Indefinite-lived intangible assets consist of trade names and trademarks. Indefinite-lived intangibles are subject to impairment testing at least annually. In addition, intangible assets are tested more frequently if a change in circumstances or the occurrence of events indicates that potential impairment exists. Customer relationships are generally amortized over periods of five to twenty-five years. Purchased patents and technology and other are generally amortized over periods of five to twenty y ears. Land use rights, which are included in other intangibles, are generally amortized over a period of fifty years. Amortizable lives are adjusted whenever there is a change in the estimated period of economic benefit. Refer to Note 11, Intangible Assets, for further detail. Retirement Benefits The cost of pension benefits is recognized over the employees’ service period. We are required to use actuarial methods and assumptions in the valuation of defined benefit obligations and the determination o f expense. Differences between actual and expected results or changes in the value of obligations and plan assets are not recognized in earnings as they occur but, rather, systematically and gradually over subsequent periods. Refer to Note 16, Retirem ent Benefits, for disclosures related to our pension and other postretirement benefits.

New Accounting Guidance

New Accounting Guidance	12 Months Ended
	Sep. 30, 2016
New Accounting Guidance [Abstract]
New Accounting Guidance	2. NEW ACCOUNTING GUIDANCE Account ing Guidance Implemented in 2016 Balance Sheet C lassification of Deferred Taxes In November 2015, the Financial Accounting Standards Board (FASB) issued guidance to simplify the presentation of deferred income taxes by requiring that all deferred tax liabilities and assets be classified as noncurrent on the balance sheet. As of the first quarter of fiscal year 2016, we adopted this guidance on a retrospective basis. Accordingly, prior year amounts have been recl assified to conform to the current year presentation. The guidance, which did not change the existing requirement to net deferred tax assets and liabilities within a jurisdiction, resulted in a reclassification adjustment that increased noncurrent deferred tax assets by $ 13.7 and decreased noncurrent deferred tax liabilities by $ 99.9 as of 30 September 2015. Discontinued Operations In April 2014, the FASB issued an update to change the criteria for determining which disposals qualify as a discontinued opera tion and to expand related disclosure requirements. Under the new guidance, a disposal is required to be reported in discontinued operations if the disposal represents a strategic shift that has or will have a major effect on operations and financial resul ts. We adopted this guidance prospectively for new disposals and new disposal groups classified as held for sale beginning in the first quarter of fiscal year 2016. This guidance had no impact on our consolidated financial statements upon adoption. As a re sult of actions taken during the second quarter of 2016, our Energy-from-Waste segment has been reported as a discontinued operation. Refer to Note 4, Discontinued Operations, for additional information. New Account ing Guidance to be Implemented Revenue Recognition In May 2014, the FASB issued guidance based on the principle that revenue is recognized in an amount expected to be collected and to which the entity expects to be entitled in exchange for the transfer of goods or services. As original ly issued, this guidance was effective for us beginning in fiscal year 2018. In August 2015, the FASB deferred the effective date by one year while providing the option to early adopt the standard on the original effective date. Accordingly, we will have t he option to adopt the standard in either fiscal year 2018 or 2019. The guidance can be adopted either retrospectively or as a cumulative-effect adjustment as of the date of adoption. We are in the initial stages of evaluating the adoption alternatives al lowed by the new standard and the impact the standard is expected to have on our consolidated financial statements. As the new standard will supersede substantially all existing revenue guidance affecting us under U.S. GAAP, it could impact the timing of r evenue and cost recognition across all of our business segments, in addition to our business processes and our information technology systems. As a result, our evaluation of the effect of the new standard will extend over future periods. Consolidation Anal ysis In February 2015, the FASB issued an update to amend current consolidation guidance. The guidance impacts the analysis an entity must perform in determining if it should consolidate certain legal entities such as limited partnerships, limited liabili ty corporations, and securitization structures. The guidance is effective beginning fiscal year 2017, with early adoption permitted. The guidance may be applied retrospectively or using a modified retrospective approach by recording a cumulative-effect adj ustment to equity as of the beginning of the fiscal year of adoption. This guidance will not have a significant impact on our consolidated financial statements. Debt Issuance Costs In April 2015, the FASB issued guidance requiring that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the debt instead of as a separate deferred asset. In August 2015, the FASB issued an update to incorporate the U.S. Securities and E xchange Commission (SEC) Staff guidance which allows debt issuance costs associated with a line-of-credit arrangement to be presented as a deferred asset that is subsequently amortized over the term of the arrangement, regardless of whether there are any o utstanding borrowings. This change in accounting principle will be adopted retrospectively beginning in fiscal year 2017 . This guidance will not have a significant impact on our consolidated financial statements. Leases In February 2016, the FASB issued guidance which requir es lessees to recognize a right -of - use asset and lease liability on the balance sheet for all leases, including operating leases, with a term in excess of 12 months. The guidance also expands the quantitative and qualitative disclosure requirements. The guidance is effective in fiscal year 2020, with early adoption permitted, and must be applied using a modified retrospective approach. We are currently evaluating the impact of adopting this new guidance on the consolidated financial sta tements , and we have started the assessment process by evaluating the population of leases under the revised definition of what qualifies as a leased asset. The Company is the lessee under various agreements for real estate, distribution equipment, aircraf t, and vehicles that are currently accounted for as operating leases as discussed in Note 12, Leases . The new guidance requires the lessee to record operating leases on the balance sheet with a right-of-use asset and corresponding liability for futur e payment obligations. Share-Based Compensation In March 2016, the FASB issued an update to simplify the accounting for employee share-based payments, including the income tax impacts, the classification on the statement of cash flows, and forfeitures. Th e amendments are effective for fiscal year 2018, with early adoption permitted. We continue to evaluate the impact of this guidance on our consolidated financial statements and the timing of adoption. Upon adoption, we currently anticipate a greater degree of volatility in the income tax provision and effective income tax rate as a result of the new guidance , which requires excess tax benefits and deficiencies to be recognized in the income statement rather than in additional paid-in capital on the balance sheet . Derivative Contract Novations In March 2016, the FASB issued guidance to clarify that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument does not, in and of itself, require re- designation of that hedging relationship provided that all other hedge accounting criteria continue to be met. This guidance is effective in fiscal year 2018, with early adoption permitted. We do not expect adoption of this guidance to have a significant impact on our co nsolidated financial statements . Credit Losses on Financial Instruments In June 2016, the FASB issued an update on the measurement of credit losses, which requires measurement and recognition of expected credit losses for financial assets, including trade receivables and capital lease receivables, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The method to determine a loss is different from the existing guidance, which requires a cre dit loss to be recognized when it is probable. The guidance is effective beginning fiscal year 2021, with early adoption permitted beginning fiscal year 2020. We are currently evaluating the impact this update will have on our consolidated financial statem ents. Cash Flow Statement Classification In August 2016, the FASB issued guidance to reduce diversity in practice on how certain cash receipts and cash payments are classified in the statement of cash flows. The guidance is effective beginning fiscal year 2019, with early adoption permitted , and should be applied retrospectively. We are currently evaluating the impact of adopting this new guidance on the co nsolidated financial statements .

Business Separation

Business Separation	12 Months Ended
	Sep. 30, 2016
Restructuring and Related Activities [Abstract]
Business Separation [Text Block]	3 . MATERIALS TECHNOLOGIES SEPARATION On 16 September 2015, the Company announced plans to separate its Materials Technologies business, which contains two divisions, Electronic Materials (EMD) and Performance Materials (PMD), into an independent publicly traded company and distribute to Air Products shareholders all of the shares of the new public company in a tax-free distribution (a “spin-off”). Versum Materials, Inc. , or Versum, was formed as the new company to hold the Materials Technologies bu siness subject to spin-off. On 6 May 2016, the Company entered into an agreement to sell certain subsidiaries and assets comprising the PMD division to Evonik Industries AG for $ 3.8 billion in cash and the assumption of certain liabilities. As a result, th e Company moved forward with the planned spin-off of Versum containing only the EMD division. As further discussed below, Air Products completed the separation of its EMD division through the spin-off of Versum on 1 October 2016. As a result, the historic al results of the EMD division will be presented as a discontinued operation beginning in fiscal year 2017. The historical results of the PMD division will be reflected as a discontinued operation when it becomes probable for the sale to occur and actions required to meet the plan of sale indicate that it is unlikely that significant changes will occur. The PMD division is not classified as held for sale due to certain conditions of the sale, including regulatory and anti-trust requirements. We continue to evaluate the progress of the sale of the PMD division to determine when it should be presented as a discontinued operation. In fiscal year 2016, we incurred separation costs of $52.2 ($ 48.3 after-tax, or $ .22 per share), primarily related to legal, adviso ry, and indirect tax costs associated with these transactions. The costs are reflected on the consolidated income statements as “Business separation costs.” A significant portion of these costs were not tax deductible because they were directly related to the plan for the tax -free spin -off of Versum. Our income tax provision includes additional tax expense related to the separation of $ 51.8 ($ .24 per share), of which $ 45.7 resulted from a dividend declared during the third quarter of 2016 to repatriate $ 443 .8 from a subsidiary in South Korea to the U.S. due to the intended separation of the EMD division from the industrial gases business in South Korea. Previously, most of these foreign earnings were considered to be indefinitely reinvested. On 30 September 2016, in anticipation of the spin-off, Versum entered into certain financing transactions to allow for a cash distribution of $ 550.0 and a distribution in-kind of notes issued by Versum with an aggregate principal amount of $ 425.0 to Air Products. Air Pro ducts then exchanged these notes with certain financial institutions for $ 418.3 of Air Products’ outstanding commercial paper. The exchange resulted in a loss of $ 6.9 ($ 4.3 after-tax, or $ .02 per share) and has been reflected on the consolidated income sta tements as “Loss on extinguishment of debt.” This loss is deductible for tax purposes. This non -cash exchange was excluded from the consolidated statements of cash flows. Refer to Note 15, Debt, for additional information on the Versum financing. Sub sequent Event On 1 October 2016 (the distribution date), Air Products completed the spin-off of Versum into a separate and independent public company by way of a distribution to the Air Products’ stockholders of all of the then issued and outstanding share s of common stock of Versum on the basis of one share of Versum common stock for every two shares of Air Products’ common stock held as of the close of business on 21 September 2016 (the record date for the distribution). Fractional shares of Versum common stock were not distributed to Air Products common stockholders. Air Products’ stockholders received cash in lieu of fractional shares. As a result of the distribution, Versum Materials, Inc. is now an independent public company and its common stock is lis ted under the symbol “VSM” on the New York Stock Exchange.

Discontinued Operations

Discontinued Operations	12 Months Ended
	Sep. 30, 2016
Discontinued Operations [Abstract]
Discontinued Operations	4. Discontinued Operations Energy-from-Waste ( EfW ) On 29 March 2016, the Board of Directors approved the Company’s exit of its EfW business. As a result, efforts to start up and operate the two EfW projects located in Tees Valley, United Kingdom, have been discontinued. The decision to exit the business and stop development of the projects was based on continued difficulties encountered and the Company’s conclusion, based on testing and analysis co mpleted during the second quarter of fiscal year 2016, that significant additional time and resources would be required to make the projects operational. The EfW segment is presented as a discontinued operation. P rior year EfW business segment information has been reclassified to conform to current year presentation. During the second quarter of fiscal year 2016, we recorded a l oss of $ 945.7 ($ 846.6 after-tax) for the disposal of the business. Income tax benefits related only to one of the projects, as the other did not qualify for a local tax deduction. This loss included $ 913.5 to write down plant assets, previously recorded as construction in progress, to their estimated net realizable value of $ 20.0 and $ 32.2 to record a liability for plant disposition and other costs. We estimated the net realizable value of the projects as of 31 March 2016 assuming an orderly liquidation of assets capable of being marketed on a secondary equipment market based on market quotes and our experience with selling similar equipment. An asset’s orderly liquidation value is the amount that could be realized from a liquidation sale, given a reasonable period of time to find a buyer, selling the asset in the existing condition where it is located, and assuming the highest and best use of the asset by market participants. There have been no significant changes in the estimated net realizable value as of 30 September 2016. A valuation allowance of $ 58.0 and unrecognized tax benefits of $ 7.9 were recorded relating to deferred tax assets on capital assets generated from the los s . The following table summarizes the carrying amount of the accrual for our actions to dispose of the EfW business at 30 September 2016, which is included in current liabilities of discontinued operations: Asset Contract Impairment Actions/Other Total Loss on disposal of business $ 913.5 $ 32.2 $ 945.7 Noncash expenses (913.5) - (913.5) Cash expenditures - (18.6) (18.6) Currency translation adjustment - (1.4) (1.4) 30 September 2016 $ - $ 12.2 $ 12.2 The results of EfW discontinued operations are summarized below: 2016 2015 2014 Loss before taxes $ (41.0) $ (9.2) $ (10.9) Income tax provision 3.4 2.4 3.4 Loss from operations of discontinued operations (37.6) (6.8) (7.5) Loss on disposal, net of tax (846.6) - - Loss from Discontinued Operations, net of tax $ (884.2) $ (6.8) $ (7.5) The loss from operations of EfW discontinued operations primarily relates to land lease costs , commercial and administrative costs, and cost incurred for ongoing project exit activities. Assets and liabilities of the EfW discontinued operations consist of the following: 30 September 30 September 2016 2015 Plant and equipment $ 18.2 $ - Other current assets 1.2 1.8 Total Current Assets $ 19.4 $ 1.8 Plant and equipment $ - $ 891.8 Total Noncurrent Assets $ - $ 891.8 Payables and accrued liabilities $ 19.0 $ 17.0 Total Current Liabilities $ 19.0 $ 17.0 Other noncurrent liabilities $ - $ 2.5 Total Noncurrent Liabilities $ - $ 2.5 Homecare In 2012, the Board of Directors authorized the sale of our Homecare business. We sold the majority of our Homecare business to The Linde Group in 2012. In 2014, a gain of $3.9 was recognized for the sale of the remaining Homecare business, which was primarily in the United Kingdom and Ireland, and the settlement of contingencies related to the 2012 sale to Th e Linde Group. The results of the Homecare discontinued operations are summarized below: 2016 2015 2014 Sales $ - $ - $ 8.5 Income before taxes $ - $ - $ .7 Income tax provision - - - Income from operations of discontinued operations - - .7 Gain on sale of business, net of tax - - 3.9 Income (Loss) from Discontinued Operations, net of tax $ - $ - $ 4.6 As of 30 September 2016 and 2015 , there were no assets or liabilities classified as discontinued operations relating to the Homecare business .

Business Restructuring and Cost

Business Restructuring and Cost Reduction Actions	12 Months Ended
	Sep. 30, 2016
Business Restructuring and Cost Reduction Actions [Abstract]
Business Restructuring and Cost Reduction Actions	5. BUSINESS RESTRUCTURING AND COST REDUCTION ACTIONS The charges we record for business restructuring and cost reduction actions have been excluded fro m segment operating income . Cost Reduction Actions In fiscal year 2016, we recognized an expense of $ 33.9 ($ 24.0 after-tax, or $ .11 per share) for severance and other benefits related to cost reduction actions which resulted in the elimination of approximately 700 positions. The expenses related primarily to the Industrial Gases – Americas and the Industrial Gases – EMEA segments. The following table summarizes the carrying amount of the accrual for cost reduction actions at 30 September 2016 : Severance and Other Benefits 2016 Charge $ 33.9 Amount reflected in pension liability (.9) Cash expenditures (20.4) Currency translation adjustment .3 30 September 2016 $ 12.9 Business Realignment and Reorganization On 18 September 2014, we announced plans to reorganize the Company, including realignment of our businesses in new reporting segments and other organizational changes, effective as of 1 October 2014. As a result of this reorganization, we incurred severance and other charges. In fiscal year 2015, we recognized an expense of $ 207.7 ($ 153.2 after-tax, or $ .71 per share). Severance and other benefits totaled $ 151.9 and related to the elimination of approximately 2,000 positions. Asset and associated contract actions totaled $ 55.8 and related primarily to a plant shutdown in the Corporate and other segment and the exit of product lines within the Industrial Gases – Global and Materials Technologies segments. The 2015 charge s related to the segment s as follows: $ 31.7 in Industrial Gases – Americas , $ 52.2 in Industrial Gases – EMEA , $ 10.3 in Industrial Gases – Asia , $ 37.0 in Industrial Gases – Global , $ 27.6 in Materials Technologies , and $ 48.9 in Corporate and other . During the fourth quar ter of 2014, an expense of $ 12.7 ($ 8.2 after-tax, or $ .04 per share) was incurred relating to the elimination of approximately 50 position s. The 2014 charge related to the segments as follows: $ 2.9 in Industrial Gases – Americas , $ 3.1 in Industrial Gases – EMEA , $ 1.5 in Industrial Gases – Asia , $ 1.5 in Industrial Gases – Global , $ 1.6 in Materials Technologies , and $ 2.1 in Corporate and other . The following table summarizes the carrying amount of the accrual for the business realignment and reorganization at 30 September 2016: Severance and Asset Other Benefits Actions/Other Total 2014 Charge $ 12.7 $ - $ 12.7 Cash expenditures (2.2) - (2.2) 30 September 2014 $ 10.5 $ - $ 10.5 2015 Charge 151.9 55.8 207.7 Amount reflected in pension liability (14.0) - (14.0) Noncash expenses - (47.4) (47.4) Cash expenditures (113.5) (1.2) (114.7) Currency translation adjustment (.4) - (.4) 30 September 2015 $ 34.5 $ 7.2 $ 41.7 Cash expenditures (34.1) (3.8) (37.9) Currency translation adjustment (.4) - (.4) 30 September 2016 $ - $ 3.4 $ 3.4

Business Combinations

Business Combinations	12 Months Ended
	Sep. 30, 2016
Business Combinations
Business Combinations	6. Business Combination On 30 December 2014, we acquired our partner’s equity ownership interest in a liquefied atmospheric industrial gases production joint venture in North America for $ 22.6 , which increased our ownership from 50 % to 100 %. The transaction was accounted for as a business combination, and subsequent to the acquisition, the results are consolidated within our Industrial Gases – Americas segment. The assets acquired, primarily plant and equipment, were recorded at their fair market values as of the acquisition date. The acquisition date fair value of the previously held equity interest was determined using a discounted cash flow analysis under the income approach. The twelve months ended 30 September 2015 include a gain of $ 17.9 ($ 1 1.2 after-tax, or $ .05 per share) as a result of revaluing our previously held equity interest to fair value as of the acquisition date. This gain is reflected on the consolidated income statements as “Gain on previously held equity interest.”

Inventories

Inventories	12 Months Ended
	Sep. 30, 2016
Inventory Disclosure [Abstract]
Inventories	7. Inventories The components of inventories are as follows: 30 September 2016 2015 Inventories at FIFO cost Finished goods $ 456.7 $ 494.9 Work in process 38.2 34.4 Raw materials, supplies and other 204.0 229.3 698.9 758.6 Less: Excess of FIFO cost over LIFO cost (79.0) (100.8) Inventories $ 619.9 $ 657.8 Inventories valued using the LIFO method comprised 34.9 % and 35.8 % of consolidated inventories before LIFO adjustment at 30 September 2016 and 2015 , respectively. Liquidation of LIFO inventory layers in 2016 , 2015 , and 2014 did not materially affect the results of operations. FIFO cost approximates replacement cos t.

Summarized Financial Informatio

Summarized Financial Information of Equity Affiliates	12 Months Ended
	Sep. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments and Joint Ventures Disclosure [Text Block]	8. Summarized Financial Information of Equity Affiliates T he summarized financial information below is on a combined 100% basis and has been compiled based on financial statements of the companies accounted for by the equity method. The amounts presented include the accounts of the following equity affiliates: Abdullah Hashim Industrial Gases & Equipment Co., Ltd. (25%); INOX Air Products Limited (50%); Air Products South Africa (Proprietary) Limited (50%); Jazan Gas Projects Company (25%); Bangkok Cogeneration Company Limited (49%); Kulim Industrial Gases Sdn. Bhd. (50%); Bangkok Industrial Gases Co., Ltd. (49%); Sapio Produzione Idrogeno Ossigeno S.r.l. (49%); Chengdu Air & Gas Products Ltd. (50%); Tecnologia en Nitrogeno S. de R.L. de C.V. (50%); Helap S.A. (50%); Tyczka Industrie-Gases GmbH (50%); High-Tech Gases (Beijing) Co., Ltd. (50%); WuXi Hi-Tech Gas Co., Ltd. (50%); INFRA Group (40%); and principally, other industrial gas producers. 30 September 2016 2015 Current assets $ 1,449.8 $ 1,296.4 Noncurrent assets 3,063.9 2,607.4 Current liabilities 699.2 654.0 Noncurrent liabilities 1,540.6 988.0 Year Ended 30 September 2016 2015 2014 Net sales $ 2,308.5 $ 2,604.3 $ 2,808.7 Sales less cost of sales 882.6 949.2 984.7 Operating income 487.8 524.0 542.9 Net income 338.0 351.0 359.5 O n 19 April 2015, a joint venture between Air Products and ACWA Holding entered into a 20-year oxygen and nitrogen supply agreement to supply Saudi Aramco’s oil refinery and power plant being built in Jazan , Saudi Arabia. Air Products own s 25% of the joint venture and guarantee s the repayment of its share of an equity bridge loan. ACWA also guarantees their share of the loan. As of 30 September 2016 and 2015, other noncurrent liabilities included $94.4 and $67.5, respectively, for our obligation to mak e future equity contributions based on our proportionate share of the advances received by the joint venture under the loan. During 2016 and 2015, we recorded noncash transactions which resulted in an increase of $ 26.9 and $67.5, respectively, to our inves tment in net assets of and advances to equity affiliates. These noncash transactions have been excluded from the consolidated statements of cash flows. In total, we expect to invest approxim ately $ 100 in this joint venture. We determined that the joint ven ture is a variable interest entity, for which we are not the primary beneficiary. Air Products has a long-term sale of equipment contract with the joint venture to engineer, procure, and construct the industrial gas facilities that will supply the gases to Saudi Aramco. In December 2015, we sold our investment in Daido Air Products Electronics, Inc. for $ 15.9 , which resulted in a gain of $ .7 . The carrying value at time of sale included a $ 12.8 investment in net assets of and advances to equity affiliates an d a $ 2.4 foreign currency translation loss that had been deferred in accumulated other comprehensive loss. In January 2016, we sold our investment in SembCorp Air Products ( HyCo ) Pte. Ltd. The transaction did not have a material impact on the financial st atements. There have been no other significant changes to our investments in equity affiliates during fiscal year 2016 . D ividends received from equity affiliates were $ 96.8 , $ 51.9 , and $ 75.4 in 2016 , 2015 , and 2014 , respectively. The investme nt in net assets of and advances to equity affiliates as of 30 September 2016 and 2015 included investment in foreign affiliates of $ 1,286.0 and $ 1,262.8 , respectively. As of 30 September 2016 and 2015 , the amount of investment in companies ac counted for by the equity method included goodwill in the amount of $ 109.5 and $ 112.0 , respectively .

Plant and Equipment, net

Plant and Equipment, net	12 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	9 . PLANT AND EQUIPMENT, NET The major classes of plant and equipment are as follows : Useful Life 30 September in years 2016 2015 Land $ 232.9 $ 226.2 Buildings 30 1,119.8 1,080.2 Production facilities Industrial Gases – Regional (A) 10 to 20 12,372.1 11,873.8 Materials Technologies 10 to 15 859.2 902.7 Other 5 to 20 36.0 43.0 Total production facilities 13,267.3 12,819.5 Distribution and other machinery and equipment (B) 5 to 25 4,042.1 3,963.1 Construction in progress 1,528.0 1,373.8 Plant and equipment, at cost 20,190.1 19,462.8 Less: accumulated depreciation 11,337.4 10,717.7 Plant and equipment, net $ 8,852.7 $ 8,745.1 (A) Depreciable lives of production facilities related to long-term customer supply contracts are matched to the contract lives. (B) The depreciable lives for various types of distribution equipment are 10 to 25 years for cylinders, depending on the nature and properties of the product; 20 years for tanks; 7.5 years for customer stations; and 5 to 15 years for tractors and trailers. Depreciation expense was $ 893.0 , $ 900.4 , and $ 914.8 in 2016 , 2015 , and 2014 , respectively.

Goodwill

Goodwill	12 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	10. GOODWILL Changes to the carrying amount of consolidated goodwill by segment are as follows: Industrial Industrial Industrial Industrial Gases– Gases– Gases– Gases– Materials Americas EMEA Asia Global Technologies Total Goodwill, net at 30 September 2014 $ 327.2 $ 433.3 $ 140.0 $ 21.4 $ 315.4 $ 1,237.3 Acquisitions and adjustments 2.2 3.2 - - - 5.4 Currency translation and other (31.8) (50.0) (6.9) (1.5) (21.2) (111.4) Goodwill, net at 30 September 2015 $ 297.6 $ 386.5 $ 133.1 $ 19.9 $ 294.2 $ 1,131.3 Currency translation and other 11.5 (5.9) 2.1 .3 10.9 18.9 Goodwill, net at 30 September 2016 $ 309.1 $ 380.6 $ 135.2 $ 20.2 $ 305.1 $ 1,150.2 30 September 2016 2015 2014 Goodwill, gross $ 1,408.8 $ 1,375.0 $ 1,522.1 Accumulated impairment losses (A) (258.6) (243.7) (284.8) Goodwill, net $ 1,150.2 $ 1,131.3 $ 1,237.3 (A) Amount is attributable to the Industrial Gases – Americas segment and includes currency translation of $46.6, $61.5, and $20.4 as of 30 September 2016, 2015, and 2014, respectively. We conduct goodwill impairment testing in the fourth quarter of each fiscal year and whenever events and changes in circumstances indicate that the carrying value of goodwill might not be recoverable. Our goodwill impairment test involves a two-step process. In the first step, we estimate the fair value of each reporting unit and compare it to its carrying value. If the fair value of the reporting unit exceeds its carrying value, goodwill is not impaired and no further testing is required. If the fair value of the reporting unit is less than its carrying value, we perform a second step to determine the amount of goodwill impairment loss, if any. In the second step, the reporting unit’s fair value is allocated to the assets and liabilities of the reporting unit, including any unrecognized intangible assets, in an analysis that calcul ates the implied fair value of goodwill in the same manner as if the reporting unit were being acquired in a business combination. If the implied fair value of the reporting unit’s goodwill is less than its carrying value, the difference is recorded as a g oodwill impairment charge. In the fourth quarter of 2014, we determined that the fair value of each reporting unit exceeded its carrying value, with the exception of the Latin America reporting unit within the Industrial Gases – Americas segment. The Latin America reporting unit is composed predominately of our Indura business with assets and goodwill associated with operations in Chile and other Latin American countries. In 2014, economic conditions in Latin America, including the impact of tax legislation in Chile, became less favorable due to increasing inflation, a decline in Chilean manufacturing growth, and weaker export demand for many commodities. As a result, our growth projections for this reporting unit were lowered and we determined that the associated goodwill w as impaired. A noncash goodwill impairment charge of $ 305.2 was recorded to write down goodwill to its implied fair value as of 1 July 2014. This impairment is reflected on our consolidated income statements within “Goodwill and intangible assets impairmen t charge.” As of 30 September 2016, accumulated impairmen t losses were $258.6 , due to the currency impacts since the loss was recorded on 1 July 2014. During the fourth quarter of 2016, we conducted our annual goodwill impairment test. We determined that the fair value of all our reporting units exceeded their carrying value . There were no indications of impairment .

Intangible Assets

Intangible Assets	12 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	11. INTANGIBLE ASSETS The table below provides details of acquired intangible assets : 30 September 2016 30 September 2015 Accumulated Accumulated Amortization/ Amortization/ Gross Impairment Net Gross Impairment Net Customer relationships $ 517.4 $ (155.2) $ 362.2 $ 507.4 $ (129.6) $ 377.8 Patents and technology 76.6 (57.9) 18.7 76.9 (53.3) 23.6 Other 81.7 (37.3) 44.4 81.8 (35.0) 46.8 Total finite-lived intangibles 675.7 (250.4) 425.3 666.1 (217.9) 448.2 Trade names and trademarks, indefinite-lived 66.2 (3.5) 62.7 63.4 (3.3) 60.1 Total Intangible Assets $ 741.9 $ (253.9) $ 488.0 $ 729.5 $ (221.2) $ 508.3 The decrease in net intangible assets from 2015 to 2016 is primarily due to amortization . Amortization expense for intangible assets was $ 32.9 , $ 36.0 , and $ 42.1 in 2016 , 2015 , and 2014 , respectively. Refer to Note 1, Major Accounting Policies, for amortization periods associated with our intangible assets. In the fourth quarter of 2016 , we conducted our annual impairment test of indefinite-lived int angibles and found no indications of impairment. In the fourth quarter of 2014, we conducted our annual impairment test of indefinite-lived intangibles utilizing the royalty savings method, a fo rm of the income approach. We determined that the carrying va lue of trade names and trademarks were in excess of their fair value, and as a result, we recorded an impairment charge of $ 4.9 to reduce these assets to their fair value. This impairment is reflected within “Goodwill and intangible asset impairment charge ” on our consolidated income statements. These trade names and trademarks are included in our Industrial Gases – Americas segment. Projected annual amortization expense for intangible assets as of 30 September 2016 is as follows: 2017 $ 31.2 2018 29.5 2019 27.9 2020 27.5 2021 26.1 Thereafter 283.1 Total $ 425.3

Leases

Leases	12 Months Ended
	Sep. 30, 2016
Leases [Abstract]
Lessee Disclosure [Text Block]	12. Leases Lessee Accounting Capital leases, primarily for the right to use machinery and equipment, are included with owned plant and equipment on the consolidated balance sheet in the amount of $ 22.7 and $ 12.8 at 30 September 2016 and 2015 , respectively. Related amounts of accumulated depreciation are $ 4.8 and $ 4.3 , respectively. Operating leases principally relate to real estate and also include aircraft, distribution equipment, and vehicles. Certain leases include escalation clauses, re newal, and/or purchase options. Rent expense is recognized on a straight-line basis over the minimum lease term. Rent expense under operating leases, including month-to-month agreements, was $ 80.8 in 2016 , $ 88.2 in 2015 , and $ 97.9 in 2014 . At 30 September 2016 , minimum payments due under leases are as follows: Capital Operating Leases Leases 2017 $ 2.0 $ 70.5 2018 1.8 62.5 2019 1.6 49.9 2020 1.6 38.4 2021 2.7 31.6 Thereafter 21.3 102.2 Total $ 31.0 $ 355.1 The present value of the above future capital lease payments totaled $ 10.2 . Refer to Note 15, Debt. In addition to the operating lease payments disclosed above, future minimum payments due under leases related to discontinued operations (i.e., Tees Valley, United Kingdom ) include approximately $ 2 in each of the next five years and $ 40 thereafter, for a total lease commitment of approximately $ 50 .
Lessor Disclosure [Text Block]	Lessor Accounting As discussed under Revenue Recognition in Note 1, Major Accounting Policies, certain contracts associated with facilities that are built to provide product to a specific customer are required to be accounted for as leases. Lease receivables, net, are primarily included in noncurrent capital lease receivables on our consolidated balance sheets , with the remaining balance in other receivables and current assets. The components of lease receivables were as follows: 30 September 2016 2015 Gross minimum lease payments receivable $ 2,072.6 $ 2,322.5 Unearned interest income (762.7) (888.1) Lease Receivables, net $ 1,309.9 $ 1,434.4 Lease payments collected in 2016 , 2015 , and 2014 were $ 186.0 , $ 148.1 , and $ 134.4 , respectively. These payments reduced the lease receivable balance by $ 85.5 , $ 69.3 , and $ 72.7 in 2016, 2015, and 2014, respectively. At 30 September 2016 , minimum lease payments expected to be collected are as follows: 2017 $ 182.7 2018 181.4 2019 175.9 2020 171.1 2021 165.1 Thereafter 1,196.4 Total $ 2,072.6

Financial Instruments

Financial Instruments	12 Months Ended
	Sep. 30, 2016
Financial Instruments [Abstract]
Financial Instruments	13. Financial Instruments Currency Price Risk Management Our earnings, cash flows, and financial position are exposed to foreign currency risk from foreign currency denominated transactions and net investments in foreign operations. It is our policy to minimize our cash flow volatility from changes in currency e xchange rates. This is accomplished by identifying and evaluating the risk that our cash flows will change in value due to changes in exchange rates and by executing the appropriate strategies necessary to manage such exposures. Our objective is to maintai n economically balanced currency risk management strategies that provide adequate downside protection. Forward Exchange Contracts We enter into forward exchange contracts to reduce the cash flow exposure to foreign currency fluctuations associated with h ighly anticipated cash flows and certain firm commitments , such as the purchase of plant and equipment. We also enter into forward exchange contracts to hedge the cash flow exposure on intercompany loans. This portfolio of forward exchange contracts consis ts primarily of Euros and U.S. dollars. The maximum remaining term of any forward exchange contract currently outstanding and designated as a cash flow hedge at 30 September 2016 is 2.8 years. Forward exchange contracts are also used to hedge the value of investments in certain foreign subsidiaries and affiliates by creating a liability in a currency in which we have a net equity position. The primary currency pair s in this portfolio of forward exchange c ontracts are Euros and U.S. dollars and British Pound Sterling and U.S. dollars . In addition to the forward exchange contracts that are designated as hedges, we utilize forward exchange contracts that are not designated as hedges. These contracts are used to economic ally hedge foreign currency-denominated monetary assets and liabilities, primarily working capital. The primary objective of these forward exchange contracts is to protect the value of foreign currency-denominated monetary assets and liabilities from the e ffects of volatility in foreign exchange rates that might occur prior to their receipt or settlement. This portfolio of forw ard exchange contracts consists of many different foreign currency pairs, with a profile that changes from time to time depending on business activity and sourcing decisions. The table below summarizes our outstanding currency price risk management instrument s: 30 September 2016 30 September 2015 Years Years US$ Average US$ Average Notional Maturity Notional Maturity Forward Exchange Contracts Cash flow hedges $ 4,130.3 .5 $ 4,543.8 .5 Net investment hedges 968.2 2.7 491.3 4.0 Not designated 2,850.5 .4 863.3 .7 Total Forward Exchange Contracts $ 7,949.0 .7 $ 5,898.4 .9 The notional value of forward exchange contracts not designated in the table above increased as a result of repayment of certain outstanding intercompany loans prior to their original maturity dates in anticipation of the spin -off of Versum. The forward exchange contracts no longer qualified as cash flow hedges due to the early repayment of the loans. We entered into additional forward exchange contracts to offset these outstanding positions to eliminate any future earnings impact. In addition to the above, we use foreign currency-denominated debt to hedge the foreign currency exposures of our net investme nt in certain foreign subsidi aries. The designated foreign currency denom inated debt and related accrued interest included € 920.7 million ($ 1,034.4 ) at 30 September 2016 and € 687.7 million ($ 768.4 ) at 30 September 2015 . The designated foreign currency-denominated debt is located on the balance sheet in the long-term debt and current portion of long-term debt line items. Debt P ortfolio Management It is our policy to identify on a continuing basis the need for debt capital and evaluate the financial risks inherent in funding the Company with debt capital. Reflecting the result of this ongoing review, the debt portfolio and hedgi ng program are managed with the objectives and intent to (1) reduce funding risk with respect to borrowings made by us to preserve our access to debt capital and provide debt capital as required for funding and liquidity purposes, and (2) manage the aggreg ate interest rate risk and the debt portfolio in accordance with certain debt management parameters. Interest Rate Management Contracts We enter into interest rate swap s to change the fixed/variable interest rate mix of our debt portfolio in order to mai ntain the percentage of fixed- and variable-rate debt within the parameters set by management. In accordance with these parameters, the agreements are used to manage interest rate risks and costs inherent in our debt portfolio. Our interest rate management portfolio generally consist s of fixed-to- floating interest rate swaps ( which are designated as fair value hedges ), pre-issuance interest rate swap s and treasury locks (which hedge the interest rate risk associated with anticipated fixed-rate debt issuance s and are designated as cash flow hedges), and floating-to-fixed interest rate swaps (which are designated as cash flow hedges). At 30 September 2016 , the outstanding interest rate swaps were denominated in U.S. dollars . The notional amount of the inter est rate swap agreements is equal to or less than the designated debt being hedged. When interest rate swaps are used to hedge variable-rate debt , the indices of the swap s and the debt to which they are designated are the same. It is our policy not to ente r into any interest rate management contracts which lever a move in interest rates on a greater than one-to-one basis. Cross Currency Interest Rate Swap Contracts We enter into cross currency interest rate swap contracts when our risk management function deems necessary. These contracts may entail both the exchange of fixed- and floating-rate interest payments periodically over the life of the agreement and the exchange of one currency for another currency at inception and at a specified future date. Thes e contracts effectively convert the currency denomination of a debt instrument into another currency in which we have a net equity position while changing the interest rate characteristics of the instrument. The contracts are used to hedge either certain n et investments in foreign operations or nonfunctional currency cash flows related to intercompany loans . The current cross currency interest rate swap portfolio consists of fixed-to-fixed swap s primarily between U.S. dollars and offshore Chinese Renminbi , U.S. dollars and Chilean Pesos, and U.S. dollars and British Pound Sterling . The following table summarizes our outstanding interest rate management contracts and cross currency interest rate swaps: 30 September 2016 30 September 2015 Average Years Average Years US$ Receive Average US$ Receive Average Notional Pay % % Maturity Notional Pay % % Maturity Interest rate swaps (fair value hedge) $ 600.0 LIBOR 2.28% 2.3 $ 600.0 LIBOR 2.77% 3.3 Cross currency interest rate swaps (net investment hedge) $ 517.7 3.24% 2.43% 2.6 $ 609.9 4.06% 2.61% 3.2 Cross currency interest rate swaps (cash flow hedge) $ 1,088.9 4.77% 2.72% 3.3 $ 1,055.2 4.29% 2.63% 3.9 Cross currency interest rate swaps (not designated) $ 27.4 3.62% .81% 1.8 $ 12.9 3.12% 3.08% 4.1 The table below summarizes the fair value and balance sheet location of our outstanding derivatives: Balance Sheet 30 September Balance Sheet 30 September Location 2016 2015 Location 2016 2015 Derivatives Designated as Hedging Instruments: Forward exchange contracts Other receivables $ 72.3 $ 52.1 Accrued liabilities $ 44.0 $ 110.7 Interest rate management contracts Other receivables 19.9 17.6 Accrued liabilities - - Other noncurrent Other noncurrent Forward exchange contracts assets 44.4 68.5 liabilities 9.1 9.2 Other noncurrent Other noncurrent Interest rate management contracts assets 160.0 153.4 liabilities 12.0 .8 Total Derivatives Designated as Hedging Instruments $ 296.6 $ 291.6 $ 65.1 $ 120.7 Derivatives Not Designated as Hedging Instruments: Forward exchange contracts Other receivables $ 78.7 $ 3.2 Accrued liabilities $ 30.0 $ 3.9 Other noncurrent Other noncurrent Forward exchange contracts assets - 23.3 liabilities - .6 Other noncurrent Other noncurrent Interest rate management contracts assets - .8 liabilities .7 - Total Derivatives Not Designated as Hedging Instruments $ 78.7 $ 27.3 $ 30.7 $ 4.5 Total Derivatives $ 375.3 $ 318.9 $ 95.8 $ 125.2 Refer to Note 14, Fair Value Measurements, which defines fair value, describes the method for measuring fair value, and provides additional disclosures regarding fair value measurements. The table below summarizes the gain or loss related to our cash flow hedges, fair value hedges, net investment hedges, and derivatives not designated as hedging instruments: Year Ended 30 September Forward Foreign Currency Exchange Contracts Debt Other (A) Total 2016 2015 2016 2015 2016 2015 2016 2015 Cash Flow Hedges, net of tax: Net gain (loss) recognized in OCI (effective portion) $ 10.5 $ (44.9) $ - $ - $ 3.2 $ 9.9 $ 13.7 $ (35.0) Net (gain) loss reclassified from OCI to sales/cost of sales (effective portion) .2 .6 - - - - .2 .6 Net (gain) loss reclassified from OCI to other income (expense), net (effective portion) (25.7) 35.6 - - (20.3) (20.2) (46.0) 15.4 Net (gain) loss reclassified from OCI to interest expense (effective portion) 6.7 .7 - - 3.3 2.6 10.0 3.3 Net (gain) loss reclassified from OCI to other income (expense), net (ineffective portion) (.2) 1.5 - - - - (.2) 1.5 Fair Value Hedges: Net gain (loss) recognized in interest expense (B) $ - $ - $ - $ - $ (8.8) $ 9.9 $ (8.8) $ 9.9 Net Investment Hedges, net of tax: Net gain (loss) recognized in OCI $ 17.4 $ 60.1 $ (9.6) $ 91.4 $ 35.0 $ 49.5 $ 42.8 $ 201.0 Derivatives Not Designated as Hedging Instruments: Net gain (loss) recognized in other income (expense), net (C) $ (.8) $ (7.3) $ - $ - $ (1.6) $ .6 $ (2.4) $ (6.7) (A) Other includes the impact on other comprehensive income (OCI) and earnings primarily related to interest rate and cross currency interest rate swaps. (B) The impact of fair value hedges noted above was largely offset by recognized gains and losses resulting from the impact of changes in related interest rates on outstanding debt. (C) The impact of the non-designated hedges noted above was largely offset by recognized gains and losses resulting from the impact of changes in exchange rates on assets and liabilities denominated in nonfunctional currencies. The amount of cash flow hedges’ unrealized gains and losses at 30 September 2016 that are expected to be reclassified to earnings in the next twelve months is not material. The cash flows related to all derivative contracts are reported in the operating activities section of the consolidated statements of cash flows. Credit Risk-Related Contingent Features Certain derivative instruments are executed under agreements that re quire us to maintain a minimum credit rating with both Standard & Poor’s and Moody’s. If our credit rating falls below this threshold, the counterparty to the derivative instruments has the right to request full collateralization on the derivatives’ net li ability position. The net liability position of derivatives with credit risk-related contingent features was $ 11. 2 as of 30 September 2016 and $ .2 as of 30 September 2015 . Because our current credit rating is above the various pre-established threshol ds, no collateral has been posted on these liability positions. Counterparty Credit Risk Management We execute financial derivative transactions with counterparties that are highly rated financial institutions, all of which are investment grade at this t ime. Some of our underlying derivative agreements give us the right to require the institution to post collateral if its credit rating falls below the pre-established thresholds with Standard & Poor’s or Moody’s. The collateral that the counterparties woul d be required to post was $ 267.6 as of 30 September 2016 and $ 226.9 as of 30 September 2015 . No financial institution is required to post collateral at this time, as all have credit ratings at or above the threshold.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Sep. 30, 2016
Fair Value Measurements [Abstract]
Fair Value Measurements	14. Fair Value Measurements Fair value is defined as an exit price , i.e., the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market parti cipants at the measurement date . The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels as follows: Level 1—Quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2—Inputs that are obs ervable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the asset or liability. Level 3—Inputs that are unobservable for the asset or liability based on our own assumptions (abou t the assumptions market participants would use in pricing the asset or liability). The methods and assumptions used to measure the fair value of financial instruments are as follows: Derivatives The fair value of our interest rate management contracts and forward exchange contracts are quantified using the income approach and are based on estimates using standard pricing models. These models take into account the value of future cash flows as of the balance sheet date, discounted to a present value using discount factors that match both the time to maturity and currency of the underlying instruments. The computation of the fair values of these instruments is generally performed by the Company. These standard pricing models utilize inputs which are derived from or corroborated by observable market data such as interest rate yield curves and currency spot and forward rates. Therefore, the fair value of our derivatives is classified as a level 2 measurement. O n an ongoing basis, we randomly test a subset of our valuations against valuations received from the transactio n’s counterparty to validate the accuracy of our standard pricing models. Counterparties to these derivative contracts are highly rated financial institutions. Refer to Note 13, Financial Instruments, for a description of derivative instruments, incl uding details on the balance sheet line classifications. Long-term Debt The fair value of our debt is based on estimates using standard pricing models that take into account the value of future cash flows as of the balance sheet date, discounted to a pre sent value using discount factors that match both the time to maturity and currency of the underlying instruments. These standard valuation models utilize observable market data such as interest rate yield curves and currency spot rates. Therefore, the fai r value of our debt is classified as a level 2 measurement. We generally perform the computation of the fair value of these instrument s . The carrying values and fair values of financial instruments were as follows: 30 September 2016 30 September 2015 Carrying Value Fair Value Carrying Value Fair Value Assets Derivatives Forward exchange contracts $ 195.4 $ 195.4 $ 147.1 $ 147.1 Interest rate management contracts 179.9 179.9 171.8 171.8 Liabilities Derivatives Forward exchange contracts $ 83.1 $ 83.1 $ 124.4 $ 124.4 Interest rate management contracts 12.7 12.7 .8 .8 Long-term debt, including current portion 5,289.4 5,467.2 4,384.7 4,645.7 The carrying amounts reported in the balance sheet for cash and cash items, trade receivables, payables and accrued liabilities, accrued income taxes, and short-term borrowings approximate fair value due to the short-term nature of these instruments. Accordingly, these items have been excluded from the above table. The following table summarizes assets and liabilities measured at fair value on a recurring basis in the consolidated balance sheets: 30 September 2016 30 September 2015 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Assets at Fair Value Derivatives Forward exchange contracts $ 195.4 $ - $ 195.4 $ - $ 147.1 $ - $ 147.1 $ - Interest rate management contracts 179.9 - 179.9 - 171.8 - 171.8 - Total Assets at Fair Value $ 375.3 $ - $ 375.3 $ - $ 318.9 $ - $ 318.9 $ - Liabilities at Fair Value Derivatives Forward exchange contracts $ 83.1 $ - $ 83.1 $ - $ 124.4 $ - $ 124.4 $ - Interest rate management contracts 12.7 - 12.7 - .8 - .8 - Total Liabilities at Fair Value $ 95.8 $ - $ 95.8 $ - $ 125.2 $ - $ 125.2 $ - The following is a tabular presentation of nonrecurring fair value measurements along with the level within the fair value hierarchy in which the fair value measurement in its entirety falls: 31 March 2016 2016 Total Level 1 Level 2 Level 3 Loss Plant and Equipment—Discontinued operations (A) $ 20.0 $ - $ - $ 20.0 $ 913.5 (A) As a result of our exit from the Energy-from-Waste business, we assessed the recoverability of assets capable of being marketed on a secondary equipment market using an orderly liquidation valuation resulting in an impairment loss for the difference between the orderly liquidation value and net book value of the assets as of 31 March 2016. There have been no significant changes in the estimated net realizable value as of 30 September 2016. For additional information, see Note 4, Discontinued Operations.

Debt

Debt	12 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	15 . Debt The tables below summarize our outstanding debt at 30 September 2016 and 2015 : Total Debt 30 September 2016 2015 Short-term borrowings $ 935.8 $ 1,494.3 Current portion of long-term debt 371.3 435.6 Long-term debt 4,918.1 3,949.1 Total Debt $ 6,225.2 $ 5,879.0 Short-term Borrowings 30 September 2016 2015 Bank obligations $ 133.1 $ 234.3 Commercial paper 802.7 1,260.0 Total Short-term Borrowings $ 935.8 $ 1,494.3 The weighted average interest rate of short-term borrowings outstanding at 30 September 2016 and 2015 was 1.1 % and .8 %, respectively. Cash paid for interest, net of amounts capitalized, was $ 121.1 in 2016 , $ 97.5 in 2015 , and $ 132.4 in 2014 . Long-term Debt 30 September Fiscal Year Maturities 2016 2015 Payable in U.S. Dollars Debentures 8.75% 2021 $ 18.4 $ 18.4 Medium-term Notes (weighted average rate) Series D 7.3% 2016 - 32.1 Series E 7.6% 2026 17.2 17.2 Senior Notes Note 2.0% 2016 - 350.0 Note 1.2% 2018 400.0 400.0 Note 4.375% 2019 400.0 400.0 Note 3.0% 2022 400.0 400.0 Note 2.75% 2023 400.0 400.0 Note 3.35% 2024 400.0 400.0 Versum Financing Senior Note 5.5% 2024 425.0 - Term Loan B 3.346% 2023 575.0 - Other (weighted average rate) Variable-rate industrial revenue bonds .68% 2035 to 2050 769.9 769.9 Other 1.3% 2018 to 2019 25.7 35.0 Payable in Other Currencies Eurobonds 4.625% 2017 337.0 335.2 Eurobonds 2.0% 2020 337.0 335.2 Eurobonds 1.0% 2025 337.0 335.2 Eurobonds .375% 2021 393.2 - Other 4.4% 2016 to 2022 53.0 161.0 Capital Lease Obligations United States 5.0% 2018 .5 .7 Foreign 11.3% 2017 to 2036 9.7 1.1 Less: Unamortized Discount (9.2) (6.3) Total Long-term Debt 5,289.4 4,384.7 Less: Current portion of long-term debt (371.3) (435.6) Long-term Debt $ 4,918.1 $ 3,949.1 Maturities of long-term debt in each of the next five years and beyond are as follows: 2017 $ 371.3 2018 419.4 2019 406.6 2020 353.4 2021 416.9 Thereafter 3,321.8 Total $ 5,289.4 Various debt agreements to which we are a party also include financial covenants and other restrictions, including restrictions pertaining to the ability to create property liens and enter into certain sale and leaseback transactions. As of 30 September 2016 , we are in compliance with all the financial and other covenants under our debt agreements. We have entered into a five-year revolving credit agreement maturing 30 April 2018 with a syndicate of banks (the “2013 Credit Agreement”), under w hich senior unsecured debt is available to both the Company and certain of its subsidiaries. There have been subsequent amendments to the 2013 Credit Agreement, and as of 30 September 2016, the maximum borrowing capacity was $ 2,690.0 . The 2013 Credit Agree ment provides a source of liquidity for the Company and supports its commercial paper program. The Company’s only financial covenant is a maximum ratio of total debt to total capitalization no greater than 70 %. No borrowings were outstanding under the 2013 Credit Agreement as of 30 September 2016 . On 1 June 2016, we issued a .375% Eurobond for € 350 million ($ 386. 9 ) that matures on 1 June 2021. The proceeds were used to repay a 2.0% Senior Note of $ 350 .0 that matured on 2 August 2016. In Septembe r 2015, we made a payment of $ 146.6 to redeem 3,000,000 Unidades de Fomento (“UF”) Series E 6.30% Bonds due 22 January 2030 that had a carrying value of $ 130.0 and resulted in a net loss of $ 16.6 ($ 14.2 after-tax, or $ .07 per share). The loss is reflected on the consolidated income statements as “Loss on extinguishment of debt.” Ad ditional commitments totaling $ 51.3 are maintained by our foreign subsidiaries, all of which was borrowed and outstanding at 30 September 2016 . Versum Financing On 30 September 2016, in connection with the spin-off, Versum entered into certain financing transactions. Versum continued to maintain the financing, further described below, subsequent to the spin-off which occurred on 1 October 2016. Refer to Note 3, Ma terials Technologies Separation, for additional information on the spin-off. Versum issued $425.0 aggregate principal amount of senior unsecured notes (the “Notes”). The Notes bear interest at a fixed interest rate of 5.50% per annum and will mature on Se ptember 30, 2024. In addition, Versum entered into a credit agreement providing for (i) a senior secured first lien term loan B facility in an aggregate principal amount of $575.0 (the “Term Facility”) and (ii) a senior secured first lien revolving credit facility in an aggregate principal amount of $ 200.0 (the “Revolving Facility”). Borrowings under the Term Facility bear interest at a rate per annum of, at Versum’s option, LIBOR, subject to a minimum floor of 0 .75 %, plus a margin of 2.50 % or an alternate base rate, subject to a minimum floor of 1.75 %, plus a margin of 1.50 %. Borrowings under the Revolving Facility bear interest initially at a rate per annum of, at Versum’s option, LIBOR plus a margin of 2.00 % or an alternate base rate plus a margin of 1.00 %. The Term Facility amortizes in equal quarterly installments in aggregate annual amounts equal to 1 .00% of the original principal amount of the Term Facility, with the balance payable on 30 September 2023. The Revolving Facility matures on 30 September 2 021. Lenders under the Revolving Facility have a maximum first lien net leverage ratio covenant (total debt net of cash on hand to total adjusted EBITDA) of 3.25:1.00 and certain other customary covenants . On 30 September 2016, the Term Facility was fully drawn and no borrowings were outsta nding under the Revolving Facility .

Retirement Benefits

Retirement Benefits	12 Months Ended
	Sep. 30, 2016
Retirement Benefits [Abstract]
Retirement Benefits	16. RETIREMENT BENEFITS The Company and certain of its subsidiaries sponsor defined benefit pension plans and defined contribution plans that cover a substantial portion of its worldwide employees. The principal defined benefit pension plans are the U.S. salaried pension plan and the U.K. pension plan. These plans were closed to new participants in 2005 and were replaced with defined contribution plans. The principal defined contribution plan is the Retirement Savings Plan, in which a substantial por tion of the U.S. employees participate; a similar plan is offered to U.K. employees. We also provide other postretirement benefits consisting primarily of healthcare benefits to U.S. retirees who meet age and service requirements. Defined Benefit Pension Plans Pension benefits earned are generally based on years of service and compensation during active employment. The cost of our defined benefit pension plans included the following components: 2016 2015 2014 U.S. International U.S. International U.S. International Service cost $ 36.5 $ 24.3 $ 42.2 $ 31.3 $ 42.6 $ 36.0 Interest cost 110.7 44.3 124.7 57.8 130.7 67.2 Expected return on plan assets (202.0) (78.3) (202.0) (79.8) (187.8) (78.1) Amortization Net actuarial loss 85.3 35.6 78.9 41.4 78.3 36.1 Prior service cost 2.8 (.2) 2.8 - 2.9 .2 Settlements 5.1 1.3 18.9 2.3 4.8 .7 Curtailments - (1.1) 5.3 - - - Special termination benefits 2.0 - 7.2 1.5 .2 .1 Other (.3) 2.1 1.0 2.1 - 2.0 Net Periodic Benefit Cost $ 40.1 $ 28.0 $ 79.0 $ 56.6 $ 71.7 $ 64.2 Net periodic benefit cost is primarily included in cost of sales, selling and administrative expense, and pension settlement loss on our consolidated income statements. The amount of net periodic benefit c ost capitalized in 2016 , 2015 , and 2014 was not material. Certain of our pension plans provide for a lump sum benefit payment option at the time of retirement, or for corporate officers, six mont hs after their retirement date. A participant’s vested benefit is considered settled upon cash payme nt of the lump sum. We recognize pension settlement losses when cash payments exceed the sum of the service and interest cost components of net periodic benefit cost of t he plan for the fiscal year. In 2016 , 2015 , and 2014 , we recognized $6.4, $ 2 1.2 and $5.5 of settlement losses, respectively, to accelerate recognition of a portion of actuarial losses deferred in accumulated other comprehensive loss primarily associated with the U.S. Supplementary Pension Plan. Special termination benefits for 2016 , 2015 , and 2014 are primarily related to the business restructuring and cost reduction actions initiated in their respective years . In addition, curtailment gains of $1.1 and curtailment losses of $5.3 are also reflected in the business restruc turing and cost reduction actions charge in 2016 and 2015, respectively . We calculate net periodic benefit cost for a given fiscal year based on assumptions developed at the end of the previous fiscal year. The following table sets forth the weighted avera ge assumptions used in the calculation of net periodic benefit cost: 2016 2015 2014 U.S. International U.S. International U.S. International Discount rate (A) 4.3 % 3.3 % 4.3 % 3.6 % 4.8 % 4.3 % Expected return on plan assets 8.0 % 6.3 % 8.3 % 6.1 % 8.3 % 6.5 % Rate of compensation increase 3.5 % 3.5 % 3.5 % 3.6 % 4.0 % 3.7 % (A) Effective in 2016, the Company began to measure the service cost and interest cost components of pension expense by applying spot rates along the yield curve to the relevant projected cash flows, as we believe this provides a better measurement of these costs. The 2016 discount rates used to measure the service cost and interest cost of our U.S. pension plans were 4.5% and 4.1%, respectively. The rates used to measure the service cost and interest cost of our major International pension plans were 3.4% and 3.2%, respectively. The previous method would have used a single discount rate for both service and interest costs. The Company has accounted for this as a change in accounting estimate and, accordingly has accounted for it on a prospective basis. This change does not affect the measurement of the total benefit obligation. The projected benefit obligation (PBO) is the actuarial present value of benefits attributable to employee service rendered to date, including the effects of estimated future sala ry increases. The following table sets forth the weighted average assumptions used in the calculation of the PBO: 2016 2015 U.S. International U.S. International Discount rate 3.5 % 2.0 % 4.4 % 3.4 % Rate of compensation increase 3.5 % 3.5 % 3.5 % 3.5 % The following table reflects the change in the PBO and the change in the fair value of plan assets based on the plan year measurement date, as well as the amounts recognized in the consolidated balance sheets: 2016 2015 U.S. International U.S. International Change in Projected Benefit Obligation Obligation at beginning of year $ 3,139.9 $ 1,647.9 $ 3,002.9 $ 1,735.7 Service cost 36.5 24.3 42.2 31.3 Interest cost 110.7 44.3 124.7 57.8 Amendments 1.2 - 1.2 (3.1) Actuarial loss 380.2 376.4 130.4 30.0 Curtailments (.4) (1.2) 5.3 (5.1) Settlement (gain) loss 5.4 (3.4) 6.7 (8.6) Special termination benefits 2.0 - 7.2 1.5 Participant contributions - 1.6 - 2.1 Benefits paid (197.4) (46.6) (181.8) (50.3) Currency translation/other (.4) (193.7) 1.1 (143.4) Obligation at End of Year $ 3,477.7 $ 1,849.6 $ 3,139.9 $ 1,647.9 Change in Plan Assets Fair value at beginning of year $ 2,613.6 $ 1,302.8 $ 2,746.2 $ 1,368.4 Actual return on plan assets 275.2 273.2 (14.0) 25.9 Company contributions 13.9 65.4 63.1 74.4 Participant contributions - 1.6 - 2.1 Benefits paid (197.4) (46.6) (181.8) (50.3) Settlements - (3.4) - (8.6) Currency translation/other - (181.9) .1 (109.1) Fair Value at End of Year $ 2,705.3 $ 1,411.1 $ 2,613.6 $ 1,302.8 Funded Status at End of Year $ (772.4) $ (438.5) $ (526.3) $ (345.1) Amounts Recognized Noncurrent assets $ - $ - $ 4.0 $ .3 Accrued liabilities (24.1) - (15.7) - Noncurrent liabilities (748.3) (438.5) (514.6) (345.4) Net Amount Recognized $ (772.4) $ (438.5) $ (526.3) $ (345.1) Certain U . S . p lans offered terminated vested participants an election to receive their accrued pension benefit as a one-time lump sum payment in 2016 . Benefits paid in 2016 include $ 5 2.9 of lump sum cash payments in connection with this offering. The changes in plan assets and benefit obligation that have been recognized in other comprehensive income on a pretax basis during 2016 and 2015 consist of the following: 2016 2015 U.S. International U.S. International Net actuarial loss arising during the period $ 311.8 $ 172.1 $ 351.8 $ 79.4 Amortization of net actuarial loss (90.4) (36.5) (97.8) (43.3) Prior service cost (credit) arising during the period 1.2 (.1) 1.2 (3.1) Amortization of prior service cost (2.8) .2 (2.8) - Total $ 219.8 $ 135.7 $ 252.4 $ 33.0 The net actuarial loss represents the actual changes in the estimated obligation and plan assets that have not yet been recognized in the consolidated income statement s and are included in accumulated other comprehensive loss. Actuarial losses arising during 201 6 are primarily attributable to lower disco unt rates , partially offset by a higher than expected return on plan assets. Accumulated actuarial gains and losses that exceed a corridor are amortized over the average remaining service period of parti cipants, which was approximately 10 years as of 30 September 2016. The components recognized in accumulated other comprehensive loss on a pretax basis at 30 September consisted of: 2016 2015 U.S. International U.S. International Net actuarial loss $ 1,273.6 $ 769.6 $ 1,052.2 $ 634.0 Prior service cost 8.5 (1.9) 10.1 (2.0) Net transition liability - .4 - .4 Total $ 1,282.1 $ 768.1 $ 1,062.3 $ 632.4 The amount of accumulated other comprehensive loss at 30 September 2016 that is expected to be recognized as a component of net periodic pension cost during fiscal year 2017, excluding amounts that may be recognized through settlement losses, is as follows: U.S. International Net actuarial loss $ 103.0 $ 58.3 Prior service cost 2.8 (.2) The accumulated benefit obligation (ABO) is the actuarial present value of benefits attributed to employee service rendered to a particular date, based on current salaries. The ABO for all defined benefit pension plans was $ 4 , 954.9 and $ 4 , 444.8 as of 30 September 2016 and 2015 , respectively. The following table provides information on pension plans where the benefit liability exceeds the value of plan assets: 30 September 2016 30 September 2015 U.S. International U.S. International Pension Plans with PBO in Excess of Plan Assets: PBO $ 3,477.7 $ 1,849.6 $ 2,917.1 $ 1,644.5 Fair value of plan assets 2,705.3 1,411.1 2,386.7 1,299.1 Pension Plans with ABO in Excess of Plan Assets: ABO $ 3,242.5 $ 1,673.6 $ 2,689.2 $ 1,498.0 Fair value of plan assets 2,705.3 1,370.1 2,386.7 1,263.2 Included in the tables above are several pension arrangements that are not funded because of jurisdictional practice. The ABO and PBO related to these plans for 2016 were $ 108.0 and $ 115.3 , respectively. Pension Plan Assets Our pension plan investment strategy is to invest in diversified portfolios to earn a long-term return consistent with acceptable risk in order to pay retirement benefits and meet regulatory funding requirements while minimizing company cash contributions over time. The plans invest primarily in passive and actively managed equity and debt securities. Equity investments are diversified geographically and by investment style and market capitalization. Fixed income investments include sovereign, corporate and asset-backed securities generally denominated in the currency of the plan. Asset allocation targets are established based on the long-term return, volatility and correlation characteristics of the asset classes, the profiles of the plans’ liabilities, an d acceptable levels of risk. Actual allocations vary from target due to market changes and are reviewed regularly. Assets are routinely rebalanced through contributions , benefit payments , and otherwise as deemed appropriate. The actual and target allocatio ns at the measurement date are as follows: 2016 Target Allocation 2016 Actual Allocation 2015 Actual Allocation U.S. International U.S. International U.S. International Asset Category Equity securities 60–80% 55–67% 65% 60% 68% 59% Debt securities 20–30% 32–43% 28% 38% 25% 40% Real estate/other 0–10% 0–2% 7% 1% 7% 0% Cash — — 0% 1% 0% 1% Total 100% 100% 100% 100% The 8.0% expected return for U.S. plan assets is based on a weighted average of estimated long-term returns of major asset classes and the historical performance of plan assets. The estimated long-term return for equity, debt securities, and real estate is 8 . 3 %, 5.1 %, and 6.9 %, respectively. In determ ining asset class returns, we take into account historical long-term returns and the value of active management, as well as other economic and market factors. The 6.3% expected rate of return for i nternational plan assets is based on a weighted average r eturn for plans outside the U.S., which vary significantly in size, asset s tructure and expected returns. The expected asset return for the U.K. plan, which represents over 80 % of the assets of our International plans, is 6.6 % and was derived from expec ted equity and debt security returns of 7.3 % and 3.5 % , respectively . The following table summarizes pension plan assets measured at fair value by asset class (see Note 14, Fair Value Measurements, for definition of the levels): 30 September 2016 30 September 2015 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 U.S. Qualified Pension Plans Cash and cash equivalents $ 12.7 $ 12.7 $ - $ - $ 11.1 $ 11.1 $ - $ - Equity securities 637.0 637.0 - - 681.7 681.7 - - Equity mutual funds 300.2 300.2 - - 480.1 480.1 - - Equity pooled funds 815.5 - 815.5 - 615.1 - 615.1 - Fixed income: Bonds (government and corporate) 747.8 - 747.8 - 651.4 - 651.4 - Real estate pooled funds 192.1 - - 192.1 174.2 - - 174.2 Total U.S. Qualified Pension Plans $ 2,705.3 $ 949.9 $ 1,563.3 $ 192.1 $ 2,613.6 $ 1,172.9 $ 1,266.5 $ 174.2 International Pension Plans Cash and cash equivalents $ 6.6 $ 6.6 $ - $ - $ 10.1 $ 10.1 $ - $ - Equity pooled funds 854.8 - 854.8 - 766.9 - 766.9 - Fixed income pooled funds 486.9 - 486.9 - 465.6 - 465.6 - Other pooled funds 17.0 - 9.7 7.3 14.9 - 8.3 6.6 Insurance contracts 45.8 - - 45.8 45.3 - - 45.3 Total International Pension Plans $ 1,411.1 $ 6.6 $ 1,351.4 $ 53.1 $ 1,302.8 $ 10.1 $ 1,240.8 $ 51.9 The following table summarizes changes in fair value of the pension plan assets classified as Level 3, by asset class: Real Estate Other Insurance Pooled Funds Pooled Funds Contracts Total 30 September 2014 $ 150.2 $ 9.3 $ 59.7 $ 219.2 Actual return on plan assets: Assets held at end of year 24.0 (.2) (11.1) 12.7 Assets sold during the period - .5 - .5 Purchases, sales, and settlements, net - (3.0) (3.3) (6.3) 30 September 2015 $ 174.2 $ 6.6 $ 45.3 $ 226.1 Actual return on plan assets: Assets held at end of year 17.9 .1 3.2 21.2 Assets sold during the period - .3 - .3 Purchases, sales, and settlements, net - .3 (2.7) (2.4) 30 September 2016 $ 192.1 $ 7.3 $ 45.8 $ 245.2 The descriptions and fair value methodologies for the U.S. and I nternational pension plan assets are as follows: Cash and Cash Equivalents The carrying amounts of cash and cash equivalents approximate fair value due to the short-term maturity. Equity Securities Equity securities are valued at the closing market price reported on a U.S. or international exchange where the security is actively traded and are therefore classified as Level 1 assets. Mutual and Pooled Funds Shares of mutual funds are val ued at the net asset value (NAV) of the fund and are classified as Level 1 assets. Units of pooled funds are valued at the per unit NAV determined by the fund manager and are classified as Level 2 assets. The investments are utilizing NAV as a practical expedient for fair value. Corporate and Government Bonds Corporate and government bonds are classified as Level 2 assets, as they are either valued at quoted market prices from observable pricing sources at the reporting date or valued based upon compa rable securities with similar yields and credit ratings. Real Estate Pooled Funds Real estate pooled f unds are classified as Level 3 assets, as they are carried at the estimated fa ir value of the underlying properties. Estimated fair value is calculated utilizing a combination of key inputs , such as revenue and expense growth rates, terminal capitalization rates, and discount rates. These key inputs are consistent with practices pre vailing within the real estate investment management industry. Other Pooled Funds Other pooled funds classified as Level 2 assets are valued at the NAV of the shares held at year end, which is based on the fair value of the underlying investments. Securi ties and interests classified as Level 3 are carried at the estimated fair value . The estimated fair value is based on the fair value of the underlying investment values, which includes estimated bids from brokers or other third-party vendor sources that utilize expected cash flow streams and other uncorroborated data including counterparty credit quality, default risk, discount rates , and the overall capital market liquidity. Insurance Contracts Insurance contracts are classified as Level 3 assets, as t hey are carried at contract value, which approximates the estimated fair value. The estimated fair value is based on the fair value of the underlying investment of the insurance company . Contributions and Projected Be nefit Payments Pension contributions to funded plans and benefit payments for unfunded plans for fiscal year 2016 were $ 79.3 . C ontributions for funded plans resulted primarily from contractual and regulatory requirements. Benefit payments to unfunded plans were due primarily to the timing o f retirements and cost reduction actions. We anticipate contributing $ 65 to $ 85 to the defined benefit pension plans in 2017 . These contributions are anticipated to be driven primarily by contractual and regulatory requirements for funded plans and bene fit payments for unfunded plans, which are dependent upon timing of retirements and actions to reorganize the business. Projected benefit payments, which reflect expected future service, are as follows: U.S. International 2017 $ 150.3 $ 45.7 2018 152.7 48.3 2019 157.2 50.2 2020 161.8 51.1 2021 166.7 54.3 2022–2026 909.6 306.9 These estimated benefit payments are based on assumptions about future events. Actual benefit payments may vary significantly from these estimates. Defined Contribution Plans We maintain a nonleveraged employee stock ownership plan (ESOP) which forms part of the Air Products and Chemicals, Inc. Retirement Savings Plan (RSP). The ESOP was established in May of 2002. The balance of the RSP is a qualified defined contribution plan including a 401(k) electi ve deferral component. A substantial portion of U.S. employees are eligible and participate. We treat dividends paid on ESOP shares as ordinary dividends. Under existing tax law, we may deduct dividends which are paid with respect to shares held by the pl an. Shares of the Company’s common stock in the ESOP totaled 3 , 031,534 as of 30 September 2016 . Our contributions to the R SP include a Company core contribution for certain eligible employees who do not receive their primary retirement benefit from the defined benefit pension plans, with the core contribution based on a percentage of pay that is dependent on years of service. For the RSP, we also make matching contributions on overall employee contributions as a percentage of the employee contribution and include an enhanced contribution for certain eligible employees that do not participate in the defined benefit pension plan s. Worldwide contrib utions expensed to income in 2016 , 2015 , and 2014 were $ 43.2 , $ 44.2 , and $ 45.2 , respectively. Other Postretirement Benefits We provide other postretirement benefits consisting primarily of healthca re benefits to certain U.S. retirees who meet age and service requirements. The healthcare benefit is a continued medical benefit until the retiree reaches age 65. Healthcare benefits are contributory, with contribution s adjusted periodically. The retiree medical costs are capped at a specified dollar amount, with the retiree contributing the remainder. The cost of our other postretirement benefit plans includes the following components: 2016 2015 2014 Service cost $ 2.2 $ 2.8 $ 3.3 Interest cost 2.0 2.2 2.3 Amortization of net actuarial loss .7 .8 1.7 Net Periodic Postretirement Cost $ 4.9 $ 5.8 $ 7.3 We calculate net periodic postretirement cost for a given fiscal year based on assumptions developed at the end of the previous fiscal year. The discount rate assumption used in the calculation of net peri odic postretirement cost for 2016 , 2015 , and 2014 was 2.4 %, 2.6 %, and 2.4 %, respectively. We measure the other postretirement benefits as of 30 September. The discount rate assumption used in the calculation of the accumulated postretirement benefit obligation was 1 .9 % and 2.4 % for 2016 and 2015 , respectively. The following table reflects the change in the accumulated postretirement benefit obligation and the amounts recognized in the consolidated balance sheets: 2016 2015 Obligation at beginning of year $ 86.9 $ 93.5 Service cost 2.2 2.8 Interest cost 2.0 2.2 Actuarial loss (gain) 7.5 (2.3) Benefits paid (12.3) (9.3) Obligation at End of Year $ 86.3 $ 86.9 Amounts Recognized Accrued liabilities $ 11.4 $ 10.4 Noncurrent liabilities 74.9 76.5 The changes in benefit obligation that have been recognized in other comprehensive income on a pretax basis during 2016 and 2015 for our other postretirement benefit plans consist of the following: 2016 2015 Net actuarial loss (gain) arising during the period $ 7.5 $ (2.3) Amortization of net actuarial loss (.7) (.8) Total $ 6.8 $ (3.1) The net actuarial loss recognized in accumulated other comprehensive loss on a pretax basis was $ 18 .7 at 30 September 2016 and $ 11 .9 at 30 September 2015 . Of the 30 September 2016 net actuarial loss, it is estimated that $ 2.3 will be amortized into net periodic postretirement cost during fiscal year 2017 . The effect of a change in the healthcare trend rate is tempered by a cap on the average retiree medical cost. The expected per capita claims costs are currently assumed to be greater than the annual cap, therefore the assumed healthcare cost trend rate , ultimate trend rate, and the year the ultimate trend rate is reached in 2016 does not apply as it has no impact on plan obligations. For 2015, the healthcare trend rate was 7%, the ultimate trend rate was 5%, and the year the ultimate trend rate is reached was 2019 . Projected benefit payments are as follows: 2017 $ 11.5 2018 11.0 2019 10.7 2020 10.2 2021 9.7 2022–2026 35.3 These estimated benefit payments are based on assumptions about future events. Actual benefit payments may vary significantly from these estimates.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Sep. 30, 2016
Commitments And Contingencies [Abstract]
Commitments and Contingencies	17. Commitments and Contingencies LITIGATION We are involved in various legal proceedings, including commercial, competition, environmental, health, safety, product liability, and insurance matters. In September 2010, the Brazilian Administrative Council for Economic Defense (CADE) issued a decision against our Brazilian subsidiary, Air Products Brasil Ltda., and several other Brazilian industrial gas companies for alleged anticompetitive activities. CADE imposed a civil fine of R$ 179.2 million (approximately $ 55 at 30 September 2016 ) on Air Products Brasil Ltda. This fine was based on a recommendation by a unit of the Brazilian Ministry of Justice , whose investigation began in 2003 , alleging violation of competition laws with respect to t he sale of industrial and medical gases. The fines are based on a percentage of our total revenue in Brazil in 2003. We have denied the allegations made by the authorities and filed an appeal in October 2010 with the Brazilian courts. On 6 May 2014, our a ppeal was granted and the fine against Air Products Brasil Ltda. was dismissed. CADE has appealed that ruling and the matter remains pending. We, with advice of our outside legal counsel, have assessed the status of this matter and have concluded that , alt hough an adverse final judgment after exhausting all appeals is possible, such a judgment is not probable. As a result, no provision has been made in the consolidated financial statements. We estimate the maximum possible loss to be the full amount of the fine of R$ 179.2 million (approximately $ 55 at 30 September 2016 ) plus interest accrued thereon until final disposition of the proceedings. Other than this matter, we do not currently believe there are any legal proceedings, individually or in th e aggregate, that are reasonably possible to have a material impact on our financial condition, results of operations, or cash flows. ENVIRONMENTAL In the normal course of business, we are involved in legal proceedings under the Comprehensive Environmental Response, Compensation, and Liability Act ( CERCLA: the fe deral Superfund law); Resource Conservation and Recovery Act (RCRA) ; and similar state and foreign environmental laws relating to the designation of certain sites for investigation or remediation. P resently, there are approximately 33 sites on which a final settlement has not been reached where we, along with others, have been designated a potentially responsible party by the Environmental Protection Agency or are otherwise engaged in investi gation or remediation, including cleanup activity at certain of our current and former manufacturing sites. We continually monitor these sites for which we have environmental exposure. Accruals for environmental loss contingencies are recorded when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated . The consolidated balance sheets at 30 September 2016 and 2015 included an accrual of $ 81.4 and $ 80.6 , respectively, primarily as part of other noncurrent liabilities. The environmental liabilities will be paid over a period of up to 30 years. We estimate the exposure for environmental loss contingencies to range from $ 81 to a reasonably possible upper exposure of $ 95 as of 30 September 2016 . Actual costs to be incurred at identified sites in future periods may vary from the estimates, given inherent uncertainties in evaluating environmental exposures. Using reasonably possible alternative assumptions of the exposure le vel could result in an increase to the environmental accrual. Due to the inherent uncertainties related to environmental exposures, a significant increase to the reasonably possible upper exposure level could occur if a new site is designated, the scope of remediation is increased, a different remediation alternative is identified, or a significant increase in our proportionate share occurs. We do not expect that any sum we may have to pay in connection with environmental matters in excess of the amounts re corded or disclosed above would have a material adverse impact on our financial position or results of operations in any one year. Pace At 30 September 2016 , $ 30.1 of the environmental accrual was related to the Pace facility. In 2006, we sold our Amines business, which included operations at Pace, Florida , and recognized a liability for retained environmental obligations associated with remediation activities at Pace. We are required by the Florida Department of Environmental Protection (FDEP) and the United States Environmental Protection Agency (USEPA) to continue our remediation efforts. We estimated that it would take 20 years to complete the groundwater remediation, and the costs through completion were estimated to range from $ 42 to $ 52 . As no amount within the range was a better estimate than another, we recognized a pretax expense in fiscal 2006 of $ 42 as a component of income from discontinued operations and recorded an environmental accrual of $ 42 in continuing oper ations on the consolidated balance sheets. There has been no change to the estimated exposure range related to the Pace facility. We have implemented many of the remedial corrective measures at the Pace facility required under 1995 Consent Orders issued b y the FDEP and the USEPA. Contaminated soils have been bioremediated , and the treated soils have been secured in a lined on-site disposal cell. Several groundwater recovery systems have been installed to contain and remove contamination from groundwater. W e completed an extensive assessment of the site to determine how well existing measures are working, what additional corrective measures may be needed, and whether newer remediation technologies that were not available in the 1990s might be suitable to mor e quickly and effectively remove groundwater contaminants. Based on assessment results, we completed a focused feasibility study that has identified alternative approaches that may more effectively remove contaminants . We continue to review alternative re medial approaches with the FDEP. In the first quarter of 2015, we entered into a new Consent Order with the FDEP requiring us to continue our remediation efforts at the Pace facility. The costs we are incurring under the new Consent Order are expected to be consistent with our previous estimates . Piedmont At 30 September 2016 , $ 17.5 of the environmental accrual was related to the Piedmont site. On 30 June 2008, we sold our Elkton, Maryland, and Piedmont, South Carolina, production facilities and the r elated North American atmospheric emulsions and global pressure sensitive adhesives businesses. In connection with the sale, we recognized a liability for retained environmental obligations associated with remediation activities at the Piedmont site. This site is under active remediation for contamination caused by an insolvent prior owner. We are required by the South Carolina Department of Health and Environmental Control to address both contaminated soil and groundwater. Numerous areas of soil contaminat ion have been addressed, and contaminated groundwater is being recovered and treated . We estimate that it will take until 2019 to complete source area remediation with groundwater recovery and treatment, continuing through 2029 . Thereafter, we are expectin g this site to go into a state of monitored na tural attenuation through 2047. We recognized a pretax expense in 2008 of $ 24 as a component of income from discontinued operations and recorded an environmental liability of $ 24 in continuing operations on the consolidated balance sheets. There have been no significant change s to the estimated exposure. Pasadena At 30 September 2016 , $ 10.4 of the environmental accrual was related to the Pasadena site. During the fourth quarter of 2012, management committed to permanently shutting down our polyurethane intermediates ( PUI ) production facility in Pasadena, T exas . In shutting down and dismantling the facility, we have undertake n certain obligations related to soil and groundw ater contaminants. We have been pumping and treating groundwater to control off -site contaminant migration in compliance with regulatory requirements and under the approval of the Texas Commission on Environmental Quality (TCEQ). We estimate that the pump and treat system will conti nue to operate until 2042 . W e plan to perform a dditional work to address other environmental obligations at the site. This additional work includes remediating, as required, impacted soils, investigating groundwater west of the former PUI facility, perfor ming post closure care for two closed RCRA surface impoundment units, and establishing engineering controls. In 2012, we estimated the total exposure at this site to be $ 13 . There has been no change to the estimated exposure. ASSET RETIREMENT OBLIGATIONS O ur asset retirement obligations are primarily associated with Industrial Gases on-site long-term supply contracts, under which we have built a facility on land owned by the customer and are obligated to remove the facility at the end of the contract term. The retirement of assets includes the contractually required removal of a long-lived asset from service, and encompasses the sale, removal, abandonment, recycling, or disposal of the assets as required at the end of the contract terms. The timing and/or me thod of settlement of these obligations are conditional on a future event that may or may not be within our control. Changes to the carrying amount of our asset retirement obligations are as follows: Balance at 30 September 2014 $ 94.0 Additional accruals 17.6 Liabilities settled (3.6) Accretion expense 4.7 Currency translation adjustment (3.3) Balance at 30 September 2015 $ 109.4 Additional accruals 10.4 Liabilities settled (4.4) Accretion expense 5.4 Currency translation adjustment (.9) Balance at 30 September 2016 $ 119.9 These obligations are primarily reflected in other noncurrent liabilities on the consolidated balance sheets. GUARANTEES AND WARRANTIES In April 2015, we entered into joint venture arrangements in Saudi Arabia. A n equity bridge loan has been provided to the joint venture until 2020 to fund equity commitments, and we guaranteed the repayment of our 25 % share of this loan. Our venture partner guaranteed repayment of their share. Our maximum exposure under the g uarantee is approximately $ 100 . As of 30 September 2016 , we recorded a noncurrent liability of $ 94.4 for our obligation to make future equity contributio ns based on the equity bridge loan. Air Products has also entered into a sale of equipment contract with the joint venture to engineer, procure, and construct the industrial gas facilities that will supply gases to Saudi Aramco. We have provided bank guara ntees to the joint venture of up to $ 311 to support our performance under the contract. Exposures under the guarantee s decline over time and will be completely extinguished after completion of the project. We are party to an equity support agreement and o perations guarantee related to an air separation facility constructed in Trinidad for a venture in which we own 50 %. At 30 September 2016 , maximum potential payments under joint and several guarantees were $ 29.0 . Exposures under the guarantee s decline over tim e and will be completely extinguished by 2024 . During the first quarter of 2014, we sold the remaining portion of our Homecare business and entered into an operations guarantee related to obligations under certain homecare contracts assigned in connection with the transaction. Our maximum potential payment under the guarantee is £ 20 million (approximately $ 25 at 30 September 2016), and our exposure will be extinguished by 2020 . To date, no equity contributions or payments have been made since the inception of these guarantees. The fair value of the above guarantees is not material. We, in the normal course of business operations, have issued product warranties related to equipment sales. Also, contracts often contain standard terms and conditions which typ ically include a warranty and indemnification to the buyer that the goods and services purchased do not infringe on third-party intellectual property rights. The provision for estimated future costs relating to warranties is not material to the consolidate d financial statements. We do not expect that any sum we may have to pay in connection with guarantees and warranties will have a material adverse effect on our consolidated financial condition, liquidity, or results of operations. UNCONDITIONAL PURCHASE OBLIGATIONS We are obligated to make future payments under unconditional purchase obligations as summarized below: 2017 $ 942 2018 525 2019 307 2020 298 2021 276 Thereafter 2,983 Total $ 5,331 Approximately $ 4,000 of our unconditional purchase obligations relate to helium purchases, which include crude feedstock supply to multiple helium refining plants in North America as well as refined helium purchases from sources around the world. As a rare byproduct of natural gas production in the energy sector, these helium sourcing agreements are medium - to long -term and contain take-or-pay provisions. The refined helium is distributed globally and sold as a merchant gas, primarily under medium -term requirements contracts. While contract terms in the energy sector are longer than those in merchant, helium is a rare gas used in applications with few or no substitutions because of its unique physical and chemical properties. Approximately $ 330 of our long-term unconditional purchase obligations relate to feedstock supply for numerous HyCO (hydrogen, carbon monoxide, and syngas) facilities. The price of feedstock supply is principally related to the price of natural gas. However , long-term take-or-pay sales contracts to HyCO customers are generally matched to the term of the feedstock supply obligations and provide recovery of price increases in the feedstock supply. D ue to the matching of most long-term feedstock supply obligati ons to customer sales contracts, we do not believe these purchase obligations would have a material effect on our financial condition or results of operations. The unconditional purchase obligations also include other product supply and purchase commitmen ts and electric power and natural gas supply purchase obligations, which are primarily pass-through contracts with our customers. P urchase commitments to spend approximately $ 350 for additional plant and equipment are included in the unconditiona l purchase obligations in 2017 . In addition, we have purchase commitments totaling approximately $ 500 in 2017 and 2018 relating to our long-term sale of equipment project for Saudi Aramco’s Jazan oil refinery.

Capital Stock

Capital Stock	12 Months Ended
	Sep. 30, 2016
Capital Stock [Abstract]
Capital Stock	18. Capital Stock Common Stock Authorized common stock consists of 300 million shares with a par value of $1 per share . As of 30 September 2016 , 249 million shares were issued, with 217 million outstanding. On 15 September 2011, the Board of Directors authorized the repurchase of up to $ 1,000 of our outstanding common stock. We repurchase shares pursuant to Rules 10b5-1 and 10b-18 under the Securities Exchange Act of 1934, as amended, through repurchase agreements est ablished with sev eral brokers. We did not purchase any of our outstanding shares during fiscal year 2016 . At 30 September 2016 , $ 485.3 in share repurchase authorization remains. The following table reflects the changes in common shares: Year ended 30 September 2016 2015 2014 Number of Common Shares Outstanding Balance, beginning of year 215,359,113 213,538,144 211,179,257 Issuance of treasury shares for stock option and award plans 1,991,712 1,820,969 2,358,887 Balance, end of year 217,350,825 215,359,113 213,538,144 Preferred Stock Authorized preferred stock consists of 25 million shares with a par value of $ 1 per share , of which 2.5 million were designated as Series A Junior Participating Preferred Stock . There were no shares issued or outstanding as of 30 September 2016 and 2015 .

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Sep. 30, 2016
Share-Based Compensation [Abstract]
Share-Based Compensation	19. Share-Based Compensation We have various share-based compensation programs, which include deferred stock units, stock options , and restricted stock. Under all programs, the terms of the awards are fixed at the grant date. We issue shares from treasury stock upon the payout of deferred stock units, the exercise of stock options, and the issuance of restricted stock awards. As of 30 September 2016 , there were 4,840 ,837 shares available for future grant under our Long-Term Incentive Pl an, which is shareholder approved. Share-based compensation cost recognized in the consolidated income statements is summarized below: 2016 2015 2014 Before-Tax Share-Based Compensation Cost $ 37.6 $ 45.7 $ 44.0 Income tax benefit (13.1) (16.0) (15.6) After-Tax Share-Based Compensation Cost $ 24.5 $ 29.7 $ 28.4 Before-tax share-based compensation cost is primarily included in selling and administrative expense on our consolidated income statements. The amount of share-based compensation cost capitalized in 2016 , 2015 , and 2014 was not material. Total before-tax share-based compensation cost by type of program was as follows: 2016 2015 2014 Deferred stock units $ 29.9 $ 28.8 $ 20.2 Stock options 4.2 12.6 21.6 Restricted stock 3.5 4.3 2.2 Before-Tax Share-Based Compensation Cost $ 37.6 $ 45.7 $ 44.0 Deferred Stock Units We have granted deferred stock units to executives, selected employees, and outside directors. These deferred stock units entitle the recipient to one share of common stock upon vesting, which is conditioned, for employee recipients, on continued employment during the deferral period and may be conditioned on achieving certain performance targets. We grant deferred stock unit awards with a two to five year deferral period that is subject to payout upon death, disability, or retirement. Deferred stock units issued to outside directors are paid after service on the Board of Directors ends at the time elected by the director (not to exceed 10 years after service ends). We generally expense the grant-date fair value of these awards on a str aight-line basis over the vesting period; however, expense recognition is accelerated for retirement eligible individuals who meet the requirements for vesting upon retirement. In 2015, we granted 119,272 market-based deferred stock units. The market-based deferred stock units vest as long as the employee continues to be employed by the Company and upon the achievement of the performance target. The performance target, which is approved by the Compensation Committee, is the Company’s total shareholder retur n (share price appreciation and dividends paid) in relation to a defined peer group over a three-year performance period. In 2016, we granted 130,167 market-based deferred stock units. The market-based deferred stock units are earned out at the end of a t hree-year performance period beginning 1 October 2015 and ending 30 September 2018. The fair value of market-based deferred stock units was estimated using a Monte Carlo simulation model as these equity awards are tied to a market condition. The model uti lizes multiple input variables that determine the probability of satisfying the market condition stipulated in the grant and calculates the fair value of the awards. We generally expense the grant-date fair value of these awards on a straight line basis ov er the vesting period. The calculation of the fair value of market-based deferred stock units used the following assumption s: 2016 2015 Expected volatility 20.5 % 19.6 % Risk-free interest rate 1.2 % .9 % Expected dividend yield 2.2 % 2.5 % The estimated grant-date fair value of market-based deferred stock units was $ 135.49 and $ 194.51 per unit in 2016 and 2015. In addition, during 2016, we granted 153,792 time-based deferred stock units at a weighted average grant-date fair value of $ 137.12 . Weighted Average Deferred Stock Units Shares (000) Grant-Date Fair Value Outstanding at 30 September 2015 1,056 $ 102.01 Granted 284 136.37 Paid out (299) 77.81 Forfeited/adjustments (40) 90.83 Outstanding at 30 September 2016 1,001 $ 119.44 Cash payments made for deferred stock units were $ 2.9 , $ 9 . 6 , and $ 2 . 1 in 2016 , 2015 , and 2014 , respectively. As of 30 September 2016 , there was $ 41.4 of unrecognized compensation cost related to deferred stock units. The cost is expected to be recognized over a weighted average period of 2.2 years. The total fair value of deferred stock units paid out during 2016 , 2015 , and 2014 , including shares vested in prior periods, was $ 41.6 , $ 35.5 , and $ 31.8 , respectively . Stock Options We have granted awards of options to purchase common stock to executives and selected employees . The exercise price of stock options equals the market price of our stock on the date of the grant. Options generally vest incrementally over three years, and remain exercisable for ten years from the date of grant. In 2016, no stock options were awarded. Fair values of stock options were estima ted using a Black Scholes model that used the assumptions noted in the table below. Expected volatility and expected dividend yield are based on actual historical experience of our stock and dividends over the historical period equal to the expected life. The expected life represents the period of time that options granted are expected to be outstanding based on an analysis of Company-specific historical exercise data. Ranges are used when certain groups of employees exhibit different behavior, such as timi ng of exercise. The risk-free rate is based on the U.S. Treasury Strips with terms equal to the expected time of exercise as of the grant date. 2015 2014 Expected volatility 30.3 % 29.8%–31.1 % Expected dividend yield 2.6 % 2.4–2.9 % Expected life (in years) 7.5 6.5–8.4 Risk-free interest rate 2.2 % 2.0%–2.7 % The weighted average grant-date fair value of options granted during 2015 and 2014 was $ 37.19 and $ 29.10 per option, respectively. A summary of stock option activity is presented below: Weighted Average Stock Options Shares (000) Exercise Price Outstanding at 30 September 2015 5,725 $ 87.35 Granted - - Exercised (1,783) 80.66 Forfeited (26) 106.52 Outstanding at 30 September 2016 3,916 $ 90.28 Exercisable at 30 September 2016 3,537 $ 86.99 Weighted Average Remaining Contractual Aggregate Intrinsic Stock Options Terms (in years) Value Outstanding at 30 September 2016 5.0 $ 235 Exercisable at 30 September 2016 4.7 $ 224 The aggregate intrinsic value represents the amount by which our closing stock price of $ 150. 34 as of 30 September 2016 exceeds the exercise price multiplied by the number of in-the-money options outstanding or exercisable . The total intrinsic value of stock options exercised during 2016 , 2015 , and 2014 was $ 115.3 , $ 115.5 , and $ 125.3 , respectively. Compensation cost is generally recognized over the stated vesting period consistent with th e terms of the arrangement (i.e., either on a straight-line or graded-vesting basis). Expense recognition is accelerated for retirement-eligible individuals who would meet the requirements for vesting of awards upon their retirement. As of 30 September 2016 , there was $ 1.1 of unrecognized compensation cost related to nonvested stock options, which is expected to be recognized over a weighted average period of 0.9 years. Cash received from option exercises during 2016 was $ 141.3 . The total tax benefit realized from stock option exercises in 2016 was $ 39.8 , of which $ 25.0 was the excess tax benefit . Restricted Stock The grant-date fair value of restricted stock is estimated on the date of grant based on the market price of the stock, and compensation cost is generally amortized to expense on a straight-line basis over the vesting period during which employees perform related services. Expense recognition i s accelerated for retirement-eligible individuals who would meet the requirements for vesting o f awards upon their retirement. We have issued shares of restricted stock to certain officers. Participants are entitled to cash dividends and to vote their resp ective shares. Restrictions on shares lift in one to four years or upon the earlier of retirement, death, or disability. The shares are nontransferable while subject to forfeiture. Weighted Average Restricted Stock Shares (000) Grant-Date Fair Value Outstanding at 30 September 2015 83 $ 121.17 Granted 33 138.00 Vested (31) 119.95 Outstanding at 30 September 2016 85 $ 128.16 As of 30 September 2016 , there was $ 5.1 of unrecognized compensation cost related to restricted stock awards. The cost is expected to be recognized over a weighted average period of 2.6 years. The total fair value of restricted stock vested during 2016 , 2015 , and 2014 was $ 4.3 , $ 1.4 , and $ 12.1 , respectively.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Sep. 30, 2016
Accumulated Other Comprehensive Loss Net of Tax [Abstract]
Accumulated Other Comprehensive Loss	20. ACCUMULATED OTHER COMPREHENSIVE LOSS The table below summarizes changes in accumulated other comprehensive loss (AOCL), net of tax, attributable to Air Products: Net loss on derivatives qualifying as hedges Foreign currency translation adjustments Pension and postretirement benefits Total Balance at 30 September 2013 $ (4.1) $ (61.5) $ (955.0) $ (1,020.6) Other comprehensive income (loss) before reclassifications (15.2) (213.1) (74.2) (302.5) Amounts reclassified from AOCL (9.1) - 84.7 75.6 Net current period other comprehensive income (loss) $ (24.3) $ (213.1) $ 10.5 $ (226.9) Amount attributable to noncontrolling interest .1 (5.9) .2 (5.6) Balance at 30 September 2014 $ (28.5) $ (268.7) $ (944.7) $ (1,241.9) Other comprehensive income (loss) before reclassifications (35.0) (699.3) (278.5) (1,012.8) Amounts reclassified from AOCL 20.8 - 97.0 117.8 Net current period other comprehensive income (loss) $ (14.2) $ (699.3) $ (181.5) $ (895.0) Amount attributable to noncontrolling interest .2 (11.5) .3 (11.0) Balance at 30 September 2015 $ (42.9) $ (956.5) $ (1,126.5) $ (2,125.9) Other comprehensive income (loss) before reclassifications 13.7 9.9 (335.1) (311.5) Amounts reclassified from AOCL (36.0) 2.7 87.2 53.9 Net current period other comprehensive income (loss) $ (22.3) $ 12.6 $ (247.9) $ (257.6) Amount attributable to noncontrolling interest (.2) 5.4 (.4) 4.8 Balance at 30 September 2016 $ (65.0) $ (949.3) $ (1,374.0) $ (2,388.3) The table below summarizes the reclassifications out of accumulated other comprehensive loss and the affected line item on the consolidated income statements: 2016 2015 2014 (Gain) Loss on Cash Flow Hedges, net of tax Sales/Cost of sales $ .2 $ .6 $ .7 Other income (expense), net (46.2) 16.9 (8.7) Interest expense 10.0 3.3 (1.1) Total (Gain) Loss on Cash Flow Hedges, net of tax $ (36.0) $ 20.8 $ (9.1) Currency Translation Adjustment (A) $ 2.7 $ ― $ ― Pension and Postretirement Benefits, net of tax (B) $ 87.2 $ 97.0 $ 84.7 (A) The impact is reflected in Other income (expense), net and primarily relates to the sale of an equity affiliate in the first quarter of 2016. Refer to Note 8, Summarized Financial Information of Equity Affiliates. (B) The components include items such as prior service cost amortization, actuarial loss amortization, and settlements and are reflected in net periodic benefit cost. Refer to Note 16, Retirement Benefits.

Noncontrolling Interests

Noncontrolling Interests	12 Months Ended
	Sep. 30, 2016
Noncontrolling Interests
Noncontrolling Interests	21. NONCONTROLLING INTERESTS INDURA S.A. Redeemable Noncontrolling Interest In 2012, we purchased a controlling equity interest in the outstanding shares of Indura S.A. As part of the purchase agreement, the largest minority shareholder in Indura S.A. had the right to exercise a put option t o require us to purchase up to a 30.5 % equity interest during the two-year period beginning on 1 July 2015, at a redemption value equal to the greater of fair market value or the acquisition date value escalate d by an inflation factor (the “floor value”). The put option was not accounted for separate from the minority interest shares that were subject to the put option. The redemption feature of the put option required classification of the minority shareholder’ s interest in the consolidated balance sheet outside of equity under the caption “Redeemable Noncontrolling Interest .” In July 2015, we completed the purchase of the 30.5 % equity interest in our Indura S.A. subsidiary from the largest minority shareholder for $ 27 7.9 based on terms substantially consistent with the original purchase agreement. The purchase was funded by the issuance o f commercial paper . We currently have a 97.8 % controlling equity interest in Indura S.A . The following is a summary of the changes in redeemable noncontrolling interest for the year ended 30 September 2015: Balance at 30 September 2014 $ 287.2 Net income 11.5 Dividends (2.0) Purchase of noncontrolling interest (277.9) Currency translation adjustment (18.8) Balance at 30 September 2015 $ - As redeemable noncontrolling interest is not part of total equity, the impa cts above are excluded from our consolidated statement s of equity.

Earnings per Share

Earnings per Share	12 Months Ended
	Sep. 30, 2016
Earnings Per Share
Earnings per Share	22. EARNINGS PER SHARE The following table sets forth the computation of basic and diluted earnings per share (EPS): 30 September 2016 2015 2014 Numerator Income from continuing operations $ 1,515.3 $ 1,284.7 $ 994.6 Income (Loss) from discontinued operations (884.2) (6.8) (2.9) Net Income Attributable to Air Products $ 631.1 $ 1,277.9 $ 991.7 Denominator (in millions) Weighted average common shares — Basic 216.4 214.9 212.7 Effect of dilutive securities Employee stock option and other award plans 1.9 2.4 2.5 Weighted average common shares — Diluted 218.3 217.3 215.2 Basic EPS Attributable to Air Products Income from continuing operations $ 7.00 $ 5.98 $ 4.68 Income (Loss) from discontinued operations (4.08) (.03) (.02) Net Income Attributable to Air Products $ 2.92 $ 5.95 $ 4.66 Diluted EPS Attributable to Air Products Income from continuing operations $ 6.94 $ 5.91 $ 4.62 Income (Loss) from discontinued operations (4.05) (.03) (.01) Net Income Attributable to Air Products $ 2.89 $ 5.88 $ 4.61 Diluted EPS attributable to Air Products reflects the potential dilution that could occur if stock options or other share-based awards were exercised or converted into common stock. The dilutive effect is computed using the treasury stock method, which assumes all share-based awards are exercised and the hypothetical proceeds from exercise are used by the Company to purchase common stock at the average market price during the period. The incremental shares (difference between shares assumed to be issued versus purchased), to the extent they would have been dilutive, are included in the denominator of the dil uted EPS calculation. Outstanding share - based awards of .2 million shares, .2 million shares, and .6 million shares were antidilutive and therefore excluded from the computation of diluted EPS for 2016 , 2015 , and 2014 , respectively.

Income Taxes

Income Taxes	12 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	23. INCOME TAXES The following table summarizes the income of U.S. and foreign operations before taxes: 2016 2015 2014 Income from Continuing Operations before Taxes United States $ 897.5 $ 742.0 $ 562.2 Foreign 1,086.1 846.2 651.8 Income from equity affiliates 148.6 154.5 151.4 Total $ 2,132.2 $ 1,742.7 $ 1,365.4 The following table shows the components of the provision for income taxes: 2016 2015 2014 Current Tax Provision Federal $ 237.9 $ 177.1 $ 19.3 State 29.1 16.9 13.0 Foreign 256.6 221.4 211.6 523.6 415.4 243.9 Deferred Tax Provision Federal 42.2 (3.5) 98.2 State 3.6 19.1 (2.7) Foreign 17.1 (12.7) 30.0 62.9 2.9 125.5 Income Tax Provision $ 586.5 $ 418.3 $ 369.4 A reconciliation of the differences between the United States federal statutory tax rate and the effective tax rate is as follows: (Percent of income before taxes) 2016 2015 2014 U.S. federal statutory tax rate 35.0 % 35.0 % 35.0 % State taxes, net of federal benefit 1.1 1.0 .5 Income from equity affiliates (2.4) (3.0) (3.9) Foreign tax differentials (7.0) (6.6) (8.2) U.S. taxes on foreign earnings (2.3) (1.6) (1.7) Domestic production activities (.8) (.9) (.7) Non-deductible goodwill impairment charge ― ― 8.0 Non-U.S. subsidiary tax election ― ― (3.8) Business separation costs 3.1 .2 ― Other (A) .8 (.1) 1.9 Effective Tax Rate 27.5 % 24.0 % 27.1 % (A) Other includes the impact of Chilean tax rate changes of 1.5% in 2014. Income tax payments, net of refunds, were $ 440.8 in 2016 , $ 392.9 in 2015 , and $ 160.6 in 2014 . Foreign tax differentials represent the differences between foreign earnings subject to foreign tax rates lower than the U. S. federal statutory tax rate of 35.0%. Foreign earnings are subject to local country tax rates that are generally below the 35.0% U.S. federal statutory rate and inclu de tax holidays and incentives. As a result, our effective non-U.S. tax rate is typical ly lower than the U.S. statutory rate. If foreign pre-tax earnings increase relative to U.S. pre-tax earnings, this rate difference could increase. The jurisdictions in which we earn pre-tax earnings subject to lower foreign taxes than the U.S . statutory r ate include South Korea, Taiwan, the United Kingdom, China, Canada, Spain and Belgium. As more than 80 % of the undistributed earnings are in countries with a statutory tax rate of 24 % or higher, we do not generate a disproportionate amount of taxable income in c ountries with very low tax rates. U. S. taxes on foreign earnings is a tax benefit primarily due to foreign tax credits on the repatriation of foreign earnings to the U.S. In 2016, the effective tax rate was impacted by tax costs of $51.8 incurred in anticipation of the tax-free spin-off of Versum, primarily for a dividend declared during the third quarter of 2016 to repatriate $443.8 from a subsidiary in South Korea to the U.S. Previously, most of these foreign earnings were considered to be indefinitely reinvested. In addition, a tax benefit was not available on a significant portion of the business separation costs. Refer to Note 3, Materials Technologies Separation, for a dditional information. In 2014, the effective tax rate was impacted by losses from transactions and a tax election made with respect to a non-U.S. subsidiary resulting in an income tax benefit of $ 51.6 . This benefit was partially offset by income tax expense of $ 20.6 related to the tax reform legislat ion enacted in Chile. The effective tax rate was also impacted by the goodwill impairment charge of $305.2 that was not deducti ble for tax purposes. See Note 10 , Goodwill, for additional information regarding the impairment charge . The significant components of deferred tax assets and liabilities are as follows: 30 September 2016 2015 Gross Deferred Tax Assets Retirement benefits and compensation accruals $ 537.9 $ 468.7 Tax loss carryforwards 93.0 116.7 Tax credits and other tax carryforwards 56.0 43.8 Reserves and accruals 80.1 71.9 Partnership and other investments 4.8 6.2 Other 45.8 66.3 Valuation allowance (155.2) (103.6) Deferred Tax Assets 662.4 670.0 Gross Deferred Tax Liabilities Plant and equipment 1,034.8 1,124.6 Currency gains 46.4 65.7 Unremitted earnings of foreign entities 5.4 62.7 Intangible assets 134.1 135.6 Other 16.1 2.1 Deferred Tax Liabilities 1,236.8 1,390.7 Net Deferred Income Tax Liability $ 574.4 $ 720.7 Deferred tax assets and liabilities are included within the consolidated financial statements as follows: 2016 2015 Deferred Tax Assets Other noncurrent assets $ 192.7 $ 82.7 Deferred Tax Liabilities Deferred income taxes 767.1 803.4 Net Deferred Income Tax Liability $ 574.4 $ 720.7 Gross federal loss and tax credit carryforwards as of 30 September 2016 were $ 137.1 and $ 25.7 , respectively. The federal loss carryforward is primarily a capital loss due to a 2014 tax election rel ated to a non-U.S. subsidiary that expires in 2019. The federal tax credit carryforwards expire in 2025 and 202 6 . Gross state loss and tax credit carryforwards as of 30 September 2016 were $ 1 23.2 and $ 3.3 , respectively. The state tax carryforwards have expiration periods between 201 8 and 2034 . Gross f oreign los s and tax credit carryforwards as of 30 September 2016 were $ 155.0 and $ 27.0 , respectively. Foreign tax carryforwards of $ 119.5 have expiration periods between 2017 and 2026 ; the remainder have unlimited carryforward periods. The valuation allowance as of 30 September 2016 of $155.2 primarily related to the tax benefit on the federal capital loss carryforward of $ 48.0 , tax benefit of foreign loss carryforwards of $ 37.7 , and capital assets of $ 58.0 that were generated from the loss recorded on the exit from the Ene rgy -from -Waste business in 2016. If events warrant the reversal of the valuation allowance, it would result in a reduction of tax expense. We believe it is more likely than not that future earnings and reversal of deferred tax liabilities will be s ufficient to utilize our deferred tax asset s , net of existing valuation allowance, at 30 September 2016 . The deferred tax liability associated with unremitted earnings of foreign entities decreased in part due to the dividend to repatriate cash from a foreign subsidiary in South Korea. This amount was also impacted by ongoing activity including earnings, dividend payments, tax credit adjustments, and currency translation impacting the undistributed earnings of our foreign subsidiaries and corporate joint ventur es which are not considered to be indefinitely reinvested outside of the U.S . We record U.S. income taxes on the undistributed earnings of our foreign subsidiaries and corporate joint ventures unless those earnings are indefinitely reinvested outside of the U.S . These cumulative undistributed earnings that are considered to be indefinitely reinvested in foreign subsidiaries and corporate joint ventures are included in retained earnings on the consolidated balance sheets and amounted to $ 6, 300.9 as of 30 September 2016 . An estimated $ 1, 467.8 in U.S. income and foreign withholding taxes would be due if these earnings were remitted as dividends after payment of all deferred taxe s. A reconciliation of the beginning and ending amount of the unrecognized tax benefits is as follows: Unrecognized Tax Benefits 2016 2015 2014 Balance at beginning of year $ 97.5 $ 108.7 $ 124.3 Additions for tax positions of the current year 15.0 6.9 8.1 Additions for tax positions of prior years 3.8 7.5 4.9 Reductions for tax positions of prior years (.3) (7.9) (14.6) Settlements (5.6) (.6) ― Statute of limitations expiration (3.0) (11.2) (14.0) Foreign currency translation (.5) (5.9) ― Balance at End of Year $ 106.9 $ 97.5 $ 108.7 At 30 September 2016 and 2015 , we had $106.9 and $97.5 of unrecognized tax benefits, excluding interest and penalties, of which $ 64.5 and $ 62.5 , respectively, would impact the ef fective tax rate if recognized. Interest and penalties related to unrecognized tax benefits are recorded as a component of income tax expense and totaled $ 2.3 in 2016 , $ (1.8) in 2015 , and $ 1.2 in 2014 . Our accrued balance for interest and penalties was $ 9.8 and $ 7.5 as of 30 September 2016 and 2015 , respectively. We are currently u nder examination in a number of tax jurisdictions, some of which may be resolved in the next twelve months. As a result, it is reasonably possible that a change in the unrecognized tax benefits may occur during the next twelve months. However, quantification of an estimated range cannot be made at this time. We generally remain subject to examination in the following major tax jurisdictions for the years indicated below: Major Tax Jurisdiction Open Tax Years North America United States 2011–2016 Canada 2012–2016 Europe France 2013–2016 Germany 2011–2016 Netherlands 2011–2016 Spain 2011–2016 United Kingdom 2013–2016 Asia China 2010–2016 Singapore 2010–2016 South Korea 2010–2016 Taiwan 2011–2016 Latin America Chile 2013–2016

Supplemental Information

Supplemental Information	12 Months Ended
	Sep. 30, 2016
Supplemental Information [Abstract]
Supplemental Information	24. SUPPLEMENTAL INFORMATION Other Receivables and Current Assets 30 September 2016 2015 Derivative instruments $ 170.9 $ 72.9 Other receivables 197.5 167.6 Current capital lease receivables 88.2 84.2 Prepaid inventory 92.8 - Other 6.2 18.8 $ 555.6 $ 343.5 Other Noncurrent Assets 30 September 2016 2015 Derivative instruments $ 204.4 $ 246.0 Other long-term receivables 20.6 21.4 Deferred financing cost, net 29.6 20.2 Prepaid tax 53.5 31.3 Deferred tax assets 192.7 82.7 Deposits 36.5 40.1 Other 200.0 206.9 $ 737.3 $ 648.6 Payables and Accrued Liabilities 30 September 2016 2015 Trade creditors $ 676.1 $ 621.9 Customer advances 376.1 195.3 Accrued payroll and employee benefits 262.6 272.9 Pension and postretirement benefits 35.5 26.1 Dividends payable 186.9 174.4 Outstanding payments in excess of certain cash balances 11.9 27.5 Accrued interest expense 47.9 52.9 Derivative instruments 74.0 114.6 Severance and other costs associated with business restructuring and cost reduction actions 16.3 41.7 Other 123.3 114.4 $ 1,810.6 $ 1,641.7 Other Noncurrent Liabilities 30 September 2016 2015 Pension benefits $ 1,186.8 $ 860.0 Postretirement benefits 74.9 76.5 Other employee benefits 108.3 106.7 Contingencies related to uncertain tax positions 95.6 91.1 Advance payments 43.8 135.1 Environmental liabilities 70.3 71.6 Derivative instruments 21.8 10.6 Asset retirement obligations 116.1 106.5 Obligation for future contribution to an equity affiliate 94.4 67.5 Other 61.4 28.4 $ 1,873.4 $ 1,554.0 Other Income (Expense), Net 30 September 2016 2015 2014 Technology and royalty income $ 20.1 $ 25.0 $ 26.8 Interest income 6.2 4.6 9.4 Foreign exchange (5.8) (22.3) (7.7) Sale of assets and investments 10.1 37.1 12.5 Contract settlements 12.6 ― 2.8 Other 14.9 2.9 9.0 $ 58.1 $ 47.3 $ 52.8 Gain on Land Sales During the fourth quarter of 2015, we sold two parcels of land resulting in a gain of $33.6 ($ 28.3 after-tax, or $ .13 per share). The gain is reflected in sale of assets and investments in the table above .

Summary by Quarter (Unaudited)

Summary by Quarter (Unaudited)	12 Months Ended
	Sep. 30, 2016
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information [Text Block]	25. SUMMARY BY QUARTER (UNAUDITED) These tables summarize the unaudited results of operations for each quarter of 2016 and 2015: 2016 Q1 Q2 Q3 Q4 Total Sales $ 2,355.8 $ 2,271.2 $ 2,434.4 $ 2,463.0 $ 9,524.4 Gross profit (A) 760.1 752.2 795.1 814.3 3,121.7 Business separation costs (B) 12.0 7.4 9.5 23.3 52.2 Business restructuring and cost reduction actions (C) - 8.6 14.2 11.1 33.9 Pension settlement loss (D) - 2.6 1.0 2.8 6.4 Operating income (A) 510.6 513.3 535.1 547.0 2,106.0 Loss on extinguishment of debt (E) - - - 6.9 6.9 Income tax provision 135.9 132.5 (F) 179.5 (F) 138.6 (F) 586.5 (F) Net income (loss) 372.0 (465.5) 354.1 400.9 661.5 Net income attributable to Air Products Income from continuing operations 377.8 379.8 355.7 402.0 1,515.3 Loss from discontinued operations (14.2) (853.1) (8.9) (8.0) (884.2) Net income (loss) attributable to Air Products 363.6 (473.3) 346.8 394.0 631.1 Basic Earnings Per Common Share Attributable to Air Products Income from continuing operations 1.75 1.76 1.64 1.85 7.00 Loss from discontinued operations (.07) (3.95) (.04) (.04) (4.08) Net income (loss) attributable to Air Products 1.68 (2.19) 1.60 1.81 2.92 Diluted Earnings Per Common Share Attributable to Air Products Income from continuing operations 1.73 1.74 1.63 1.84 6.94 Loss from discontinued operations (.06) (3.91) (.04) (.04) (4.05) Net income (loss) attributable to Air Products 1.67 (2.17) 1.59 1.80 2.89 Dividends declared per common share .81 .86 .86 .86 3.39 Market price per common share: High 143.83 147.16 152.16 157.84 Low 126.65 114.64 134.15 137.31 2015 Q1 Q2 Q3 Q4 Total Sales $ 2,560.8 $ 2,414.5 $ 2,470.2 $ 2,449.4 $ 9,894.9 Gross profit 731.1 716.3 755.0 753.5 2,955.9 Business separation costs (B) - - - 7.5 7.5 Business restructuring and cost reduction actions (C) 32.4 55.4 58.2 61.7 207.7 Pension settlement loss (D) - 12.6 1.6 7.0 21.2 Gain on previously held equity interest (G) 17.9 - - - 17.9 Gain on land sales (H) - - - 33.6 33.6 Operating income 432.3 376.9 424.8 474.3 1,708.3 Loss on extinguishment of debt (E) - - - 16.6 16.6 Income tax provision 107.1 87.7 104.1 119.4 418.3 Net income 337.5 296.9 333.2 350.0 1,317.6 Net income attributable to Air Products Income from continuing operations 326.3 291.9 320.5 346.0 1,284.7 Loss from discontinued operations (1.7) (1.9) (1.7) (1.5) (6.8) Net income attributable to Air Products 324.6 290.0 318.8 344.5 1,277.9 Basic Earnings Per Common Share Attributable to Air Products Income from continuing operations 1.53 1.36 1.49 1.61 5.98 Loss from discontinued operations (.01) (.01) (.01) (.01) (.03) Net income attributable to Air Products 1.52 1.35 1.48 1.60 5.95 Diluted Earnings Per Common Share Attributable to Air Products Income from continuing operations 1.51 1.34 1.48 1.59 5.91 Loss from discontinued operations (.01) (.01) (.01) (.01) (.03) Net income attributable to Air Products 1.50 1.33 1.47 1.58 5.88 Dividends declared per common share .77 .81 .81 .81 3.20 Market price per common share: High 149.61 158.20 153.93 148.56 Low 118.20 137.07 136.69 123.66 (A) Changes in estimates on projects accounted for under the percentage of completion method favorably impacted income by approximately $20 in fiscal year 2016, primarily during the fourth quarter. For additional information, see Note 1, Major Accounting Policies (Revenue Recognition). (B) For additional information, see Note 3, Materials Technologies Separation. (C) For additional information, see Note 5, Business Restructuring and Cost Reduction Actions. (D) For additional information, see Note 16, Retirement Benefits. (E) For additional information, see Note 15, Debt. (F) Includes income tax expense for tax costs associated with business separation. For additional information, see Note 3, Materials Technologies Separation. (G) For additional information, see Note 6, Business Combination. (H) The gain is reflected on the consolidated income statements in “Other income (expense), net.” For additional information, see Note 24, Supplemental Information.

Business Segment and Geographic

Business Segment and Geographic Information	12 Months Ended
	Sep. 30, 2016
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Business Segment and Geographic Information	26. Business Segment and Geographic Information Our reporting segments reflect the manner in which our chief operating decision maker reviews results and allocates resources. Except in the Corporate and other segment, each reporting segment meets the definition of an operating segment and does not include the aggregation of multiple operating segments. Our liquefied natural gas (LNG) and helium storage and distribution sale of equipment businesses are aggregated within the Corporate and other segm ent. Our reporting segments are: Industrial Gases – Americas Industrial Gases – EMEA (Europe, Middle East, and Africa) Industrial Gases – Asia Industrial Gases – Global Materials Technologies Corporate and other Industrial Gases – Regional The regional Industrial Gases (Americas, EMEA, Asia) segments include the results of our regio nal industrial gas businesses, which produce and sell atmospheric gases such as oxygen, nitrogen, and argon (primarily recovered by the cryogenic distillation of air) and process gases such as hydrogen, carbon monoxide, helium, syngas, and specialty gases. We supply gases to customers in many industries, including those in metals, glass, chemical processing, energy production and refining, food processing, metallurgical industries, medical, and general manufacturing. We distribute gases to our customers thr ough a variety of supply modes including liquid or gaseous bulk supply delivered by tanker or tube trailer and, for smaller customers, packaged gases delivered in cylinders and dewars or small on-sites (cryogenic or non-cryogenic generators). For large-vol ume customers, we construct an on-site plant adjacent to or near the customer’s facility or deliver product from one of our pipelines. We are the world’s largest provider of hydrogen, which is used by refiners to facilitate the conversion of heavy crude fe edstock and lower the sulfur content of gasoline and diesel fuels. Electricity is the largest cost component in the production of atmospheric gases, and natural gas is the principal raw material for hydrogen, carbon monoxide, and syngas production. We miti gate energy and natural gas prices contractually through pricing formulas, surcharges, and cost pass-through arrangements. The regional Industrial Gases segments also include our share of the results of several joint ventures accounted for by the equity me thod. The largest of these joint ventures operate in Mexico, Italy, South Africa, India, Saudi Arabia, and Thailand. Each of the regional Industrial Gases segments competes against global industrial gas companies as well as regional competitors. Competitio n is based primarily on price, reliability of supply, and the development of industrial gas applications. We derive a competitive advantage in locations where we have pipeline networks, which enable us to provide reliable and economic supply of products to larger customers. Industrial Gases – Global The Industrial Gases – Global segment includes cryogenic and gas processing equipment sales for air separation. The equipment is sold worldwide to customers in a variety of industries, including chemical and pet rochemical manufacturing, oil and gas recovery and processing, and steel and primary metals processing. The Industrial Gases – Global segment also includes centralized global costs associated with management of all the Industrial Gases segments. These cost s include Industrial Gases global administrative costs, product development costs, and research and development costs. We compete with a large number of firms for all the offerings included in the Industrial Gases – Global segment. Competition in the equip ment businesses is based primarily on technological performance, service, technical know-how, price, and performance guarantees. Materials Technologies The Materials Technologies segment, which contains two divisions, Electronic Materials (EMD) and Perform ance Materials (P MD), employs applications technology to provide solutions to a broad range of global industries through chemical synthesis, analytical technology, process engineering, and surface science. EMD provides specialty gases, specialty chemicals, services, and equipment to the electronics industry, primarily for the manufacture of silicon and compound semiconductors and thin film transistor liquid crystal (LCD) displays. PMD provides performance chemical solutions for the coatings, inks, adhesives , construction and civil engineering, personal care, institutional and industrial cleaning, mining, oil refining, and polyurethanes industries. We compete in the businesses included in the Materials Technologies segment on a product-by-product basis agains t competitors ranging from niche suppliers with a single product to larger and more vertically integrated companies. Competition is principally conducted on the basis of price, quality, product performance, reliability of product supply, technical innovati on, service, and global infrastructure. During 2016, Air Pro ducts entered into an agreement to sell certain subsidiaries and assets comprising the PMD division. The sale is subject to regulatory and anti -trust requirements. On 1 October 2016, Air Products completed the separation of it s EMD division through the spin - o ff of Versum. Refer to Note 3, Materials Technologies Separation, for additional information. Corporate and other The Corporate and other segment includes two ongoing global businesses (our LNG sale of equipment business and our liquid helium and liq uid hydrogen transport and storage container businesses), the polyurethane intermediates (PUI) business that was exited in early fiscal year 2014, and corporate support functions that benefit all the segments. Competition for the two sale of equipment busi nesses is based primarily on technological performance, service, technical know-how, price, and performance guarantees. Corporate and other also includes income and expense that cannot be directly associated with the business segments, including foreign ex change gains and losses and stranded costs resulting from discontinued operations. Also included are LIFO inventory adjustments, as the business segments use FIFO, and the LIFO pool adjustments are not allocated to the business segments. In addition to ass ets of the global businesses included in this segment, other assets include cash, deferred tax assets, and financial instruments. Customers We do not have a homogeneous customer base or end market, and no single customer accounts for more than 10% of our consolidated revenues. Accounting Policies The accounting policies of the segments are the same as those described in Note 1, Major Account ing Policies. We evaluate the performance of segments based upon reported segment operating income. Business Segment Industrial Industrial Industrial Industrial Gases– Gases– Gases– Gases– Materials Corporate Segment Americas EMEA Asia Global Technologies and other Total 2016 Sales to external customers $ 3,343.6 $ 1,700.3 $ 1,716.1 $ 498.8 $ 2,019.5 $ 246.1 $ 9,524.4 Operating income (loss) 895.2 382.8 449.1 (21.3) 530.2 (37.5) 2,198.5 Depreciation and amortization 442.5 185.7 197.1 7.9 77.4 15.3 925.9 Equity affiliates' income (loss) 52.7 36.5 57.8 (.1) 1.7 - 148.6 Expenditures for long-lived assets 406.6 159.5 313.3 6.0 147.9 22.5 1,055.8 Investments in net assets of and advances to equity affiliates 250.6 580.5 442.5 10.0 4.5 - 1,288.1 Total assets 5,889.2 3,178.6 4,232.7 367.6 1,787.0 2,580.8 18,035.9 2015 Sales to external customers $ 3,693.9 $ 1,864.9 $ 1,637.5 $ 286.8 $ 2,087.1 $ 324.7 $ 9,894.9 Operating income (loss) 808.4 330.7 380.5 (51.6) 476.7 (51.5) 1,893.2 Depreciation and amortization 416.9 194.3 202.9 16.5 92.8 13.0 936.4 Equity affiliates' income (loss) 64.6 42.4 46.1 (.8) 2.2 - 154.5 Expenditures for long-lived assets 414.5 215.6 402.5 94.8 102.5 35.7 1,265.6 Investments in net assets of and advances to equity affiliates 249.7 564.1 421.7 14.3 15.9 - 1,265.7 Total assets 5,774.9 3,323.9 4,154.0 370.5 1,741.9 1,075.7 16,440.9 2014 Sales to external customers $ 4,078.5 $ 2,150.7 $ 1,527.0 $ 296.0 $ 2,064.6 $ 322.2 $ 10,439.0 Operating income (loss) 762.6 351.2 310.4 (57.3) 379.0 (78.5) 1,667.4 Depreciation and amortization 414.4 220.2 205.3 7.1 99.1 10.8 956.9 Equity affiliates' income 60.9 44.1 38.0 5.8 2.6 - 151.4 Expenditures for long-lived assets 484.2 239.1 430.3 77.7 64.2 67.2 1,362.7 Investments in net assets of and advances to equity affiliates 234.3 552.9 434.1 18.8 17.8 - 1,257.9 Total assets 6,240.7 3,521.0 4,045.6 389.4 1,835.7 1,044.5 17,076.9 Below is a reconciliation of segment total operating income to consolidated operating income: Operating Income 2016 2015 2014 Segment total $ 2,198.5 $ 1,893.2 $ 1,667.4 Business separation costs (52.2) (7.5) - Business restructuring and cost reduction actions (33.9) (207.7) (12.7) Pension settlement loss (6.4) (21.2) (5.5) Goodwill and intangible asset impairment charge - - (310.1) Gain on previously held equity interest - 17.9 - Gain on land sales (A) - 33.6 - Consolidated Total $ 2,106.0 $ 1,708.3 $ 1,339.1 (A) Reflected on the consolidated income statements in "Other income (expense), net." Below is a reconciliation of segment total assets to consolidated total assets: Total Assets 2016 2015 2014 Segment total $ 18,035.9 $ 16,440.9 $ 17,076.9 Discontinued operations 19.4 893.6 591.4 Consolidated Total $ 18,055.3 $ 17,334.5 $ 17,668.3 The sales information noted above relates to external customers only. All intersegment sales are eliminated in consolidation. The Industrial Gases – Global segment had intersegment sales of $ 232.4 in 2016 , $ 242.8 in 2015 , and $ 192.4 in 2014 . These sales are generally transacted at market pricing. For all other segments, intersegment sales are not material for all periods presented. Equipment manufactured for our regional industrial gases segments are generally transferred at cost and not reflected as an intersegment sale. Geographic Information Sales to External Customers 2016 2015 2014 United States $ 3,792.3 $ 4,280.1 $ 4,507.6 Canada 225.7 247.1 311.4 Europe 2,505.9 2,315.4 2,628.0 Asia, excluding China 1,382.7 1,395.2 1,389.4 China 1,176.2 1,129.1 981.0 Latin America 441.6 528.0 621.6 Total $ 9,524.4 $ 9,894.9 $ 10,439.0 Long-Lived Assets (A) 2016 2015 2014 United States $ 3,780.2 $ 3,788.5 $ 3,754.2 Canada 639.0 577.4 518.0 Europe 1,306.1 1,395.0 1,656.7 Asia, excluding China 1,056.5 914.2 989.9 China 1,721.9 1,732.7 1,582.7 Latin America 349.0 337.3 440.1 Total $ 8,852.7 $ 8,745.1 $ 8,941.6 (A) Long-lived assets include plant and equipment, net. Geographic information is based on country of origin . Included in United States revenues are export sales to third- party customers of $ 307.7 in 2016 , $ 398.8 in 2015 , and $ 378.7 in 2014 . The Europe region operates principally in France, Germany, the Netherl ands, Poland, Saudi Arabia, Spain, and the United Kingdom . The Asia region operates pr incipally in China , Singapore, South Korea, and Taiwan. The Latin America region operates principally in Brazil and Chile.

Schedule II

Schedule II	12 Months Ended
	Sep. 30, 2016
Valuation and Qualifying Accounts [Abstract]
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	SCHEDULE II CONSOLIDATED AIR PRODUCTS AND CHEMICALS, INC. AND SUBSIDIARIES SCHEDULE II–VALUATION AND QUALIFYING ACCOUNTS For the Years Ended 30 September 2016, 2015, and 2014 Balance at Additions Additions Balance Beginning Charged to Charged to Other at End of of Period Expense Other Accounts Changes (A) Period Year Ended 30 September 2016 Allowance for doubtful accounts $ 49 $ 9 $ 14 $ (15) $ 57 Allowance for deferred tax assets (B) 104 1 51 (1) 155 Year Ended 30 September 2015 Allowance for doubtful accounts $ 60 $ 8 $ 18 $ (37) $ 49 Allowance for deferred tax assets 104 - 2 (2) 104 Year Ended 30 September 2014 Allowance for doubtful accounts $ 102 $ 8 $ 8 $ (58) $ 60 Allowance for deferred tax assets (C) 45 58 1 - 104 (A) Primarily includes write-offs of uncollectible trade receivables. Other Changes also includes the impact of foreign currency translation adjustments. (B) The increase in the valuation allowance was primarily due to the loss recorded on the exit from the Energy-from-Waste business. These costs were recorded in discontinued operations. See Note 4, Discontinued Operations, for additional information. (C) The increase in the valuation allowance was primarily due to the capital loss generated from the tax election related to a non-U.S. subsidiary.

Major Accounting Policies (Poli

Major Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation and Consolidation Principles	Basis of Presentation and Consolidation Principles The accompanying consolidated financial statements of Air Products and Chemicals, Inc. were prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the accounts of Air Products and Chemicals, Inc. and those of its controlled subsidiari es (“we,” “our,” “us,” the “Company,” “Air Products,” or “registrant”), which are generally majority owned. Intercompany transactions and balances are eliminated in consolidation. We consolidate all entities that we control. The general condition for cont rol is ownership of a majority of the voting interests of an entity. Control may also exist in arrangements where we are the primary beneficiary of a variable interest entity (VIE). An entity that has both the power to direct the activities that most signi ficantly impact the economic performance of a VIE and the obligation to absorb the losses or receive the benefits significant to the VIE is considered the primary beneficiary of that entity. We have determined that we are not a primary beneficiary in any m aterial VIE. Certain prior year information has been reclassified to conform to the 2016 presentation.
Estimates and Assumptions	Estimates and Assumptions The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumpti ons that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition Revenue from product sales is recognized as risk and title to the product transfer to the customer ( which generally occurs at the time shipment is made), the sales price is fixed or determinable, and collectability is reasonably assured. Sales returns and allowances are not a business practice in the industry. Revenue from equipment sale contracts is re corded primarily using the percentage-of-completion method. Under this method, revenue from the sale of major equipment, such as liquefied natural gas (LNG) heat exchangers and large air separation units, is recognized based on labor hours or costs incurre d to date compared with total estimated labor hours or costs to be incurred. When adjustments in estimated total contract revenues or estimated total costs or labor hours are required, any changes in the estimated profit from prior estimates are recognized in the current period for the inception-to-date effect of such change. Changes in estimates on projects accounted for under the p ercentage -of -completion method favorably impacted operating income by approximately $ 20 in fiscal year 2016, primarily during the fourth quarter . Our changes in estimates would not have significantly impacted amounts recorded in prior years. Changes in estimates during fiscal years 2015 and 2014 were not significant. Certain contracts associated with facilities that are built to provide product to a specific customer are required to be accounted for as leases. In cases where operating lease treatment is necessary, there is no difference in revenue recognition over the life of the contract as compared to accounting for the contrac t as product sales. In cases where capital lease treatment is necessary, the timing of revenue and expense recognition is impacted. Revenue and expense are recognized up front for the sale of equipment component of the contract as compared to revenue recog nition over the life of the arrangement under contracts not qualifying as capital leases. Additionally, a portion of the revenue representing interest income from the financing component of the lease receivable is reflected as sales over the life of the co ntract. Allowances for credit losses associated with capital lease receivables are recorded using the specific identification method. As of 30 September 2016 and 2015 , the credit quality of capital lease receivables did not require an allowance for credit losses. If an arrangement involves multiple deliverables, the delivered items are considered separate units of accounting if the items have value on a stand-alone basis. Revenues are allocated to each deliverable based upon relative selling prices derived from company specific evidence. Amounts billed for shipping and handling fees are classified as sales in the consolidated income statements. Amounts billed for sales and use taxes, value-added taxes, and certain excise and other specific transac tional taxes imposed on revenue-producing transactions are presented on a net basis and excluded from sales in the consolidated income statements. We record a liability until remitted to the respective taxing authority.
Cost of Sales	Cost of Sales Cost of sales predom inantly represents the cost of tangible products sold. These costs include labor, raw materials, plant engineering, power, depreciation, production supplies and materials packaging costs, and maintenance costs. Costs incurred for shipping and handling are also included in cost of sales.
Depreciation	Depreciation Depreciation is recorded using the straight-line method, which deducts equal amounts of the cost of each asset from earnings every year over its expected economic useful life. The principal lives for major cla sses of plant and equipment are summarized in Note 9, Plant and Equipment, net.
Selling and Administrative	Selling and Administrative The principal component s of selli ng and administrative expenses are compensation, advertising , and promotional costs .
Postemployment Benefits	Postemployment Bene fits We provide termination benefits to employees as part of ongoing benefit arrangements and record a liability for termination benefits when probable and estimable. These criteria are met when management, with the appropriate level of authority, approve s and commits to its plan of action for termination; the plan identifies the employees to be terminated and their related benefits; and the plan is to be completed within one year. We do not provide one-time benefit arrangements of significance.
Fair Value Measurements	Fair Valu e Measurements We are required to measure certain assets and liabilities at fair value, either upon initial measurement or for subsequent accounting or reporting. For example, fair value is used in the initial measurement of net assets acquired in a business combination; on a recurring basis in the measurement of derivative financial instruments; and on a nonrecurring basis when long-lived assets are written down to fair value when held for sale or determined to be impaired. Refer to Note 14, Fair Value Measurements, for information on the methods and assumptions used in our fair value measurements
Financial Instruments	Financial Instruments We address certain financial exposures through a c ontrolled program of risk management that includes the use of derivative financial instruments. The types of derivative financial instruments permitted for such risk management programs are specified in policies set by management. Refer to Note 13, Fi nancial Instruments, for further detail on the types and use of derivative instruments into which we enter. Major financial institutions are counterparties to all of these derivative contracts. We have established counterparty credit guidelines and generally en ter into transactions with financial institutions of investment grade or better. Management believes the risk of incurring losses related to credit risk is remote, and any losses would be immaterial to the consolidated financial results, financial conditio n, or liquidity. We recognize derivatives on the balance sheet at fair value. On the date the derivative instrument is entered into, we generally designate the derivative as either (1) a hedge of a forecasted transaction or of the variability of cash flow s to be received or paid related to a recognized asset or liability (cash flow hedge), (2) a hedge of a net investment in a foreign operation (net investment hedge), or (3) a hedge of the fair value of a recognized asset or liability (fair value hedge). T he following details the accounting treatment of our cash flow, fair value, net investment, and non-designated hedges: Changes in the fair value of a derivative that is designated as and meets the cash flow hedge criteria are recorded in Accumulated other comprehensive loss (AOC L ) to the extent effective and then recognized in earnings when the hedged items affect earnings. Changes in the fair value of a derivative that is designated as and meets all the required criteria for a fair value hedge, along wit h the gain or loss on the hedged asset or liability that is attributable to the hedged risk, are recorded in current period earnings. Changes in the fair value of a derivative and foreign currency debt that are designated as and meet all the required crit eria for a hedge of a net investment are recorded as transla tion adjustments in AOCL . Changes in the fair value of a derivative that is not designated as a hedge are recorded immediately in earnings. We formally document the relationships between hedging instruments and hedged items, as well as our risk management objective and strategy for undertaking various hedge transactions. This process includes relating derivatives that are designated as fair value or cash flow hedges to specific assets and liabili ties on the balance sheet or to specific firm commitments or forecasted transactions. We also formally assess, at the inception of the hedge and on an ongoing basis, whether derivatives are highly effective in offsetting changes in fair values or cash flow s of the hedged item. If it is determined that a derivative is not highly effective as a hedge, or if a derivative ceases to be a highly effective hedge, we will discontinue hedge accounting with respect to that derivative prospectively.
Foreign Currency	Foreign Currency Since we do business in many foreign countries, fluctuations in currency exchange rates affect our financial position and results of operations. In most of our foreign operations, the local currency is considered the functional currency. Foreign subsidiaries translate their assets and liabilities into U.S. dollars at current exchange rates in effect at the end of the fiscal period. The gains or losses that result from this process are shown as translation adjustments in AOCI in the equity section of the balance sheet. The revenue and expense accounts of foreign subsidiaries are translated into U.S. dollars at the average exchange rates that prevail during the period. Therefore, the U.S. dollar value of these items on the income statement fluctuate s from period to period, depending on the value of the dollar against foreign currencies. Some transactions are made in currencies different from an entity’s functional currency. Gains and losses from these foreign currency transactions are generally inclu ded in other income (expense), net on our consolidated income statements as they occur.
Environmental Expenditures	Environmental Expenditures Accruals for environmental loss contingencies are recorded when it is probable that a liability has been incurred and the amount of loss ca n be reasonably estimated. Remediation costs are capitalized if the costs improve the Company’s property as compared with the condition of the property when originally constructed or acquired, or if the costs prevent environmental contamination from future operations. We expense environmental costs related to existing conditions resulting from past or current operations and from which no current or future benefit is discernible. The amounts charged to income from continuing operations related to environment al matters totaled $ 27.0 in fiscal 2016 , $ 28.3 in 2015 , and $ 35.1 in 2014 . The measurement of environmental liabilities is based on an evaluation of currently available information with respect to each indi vidual site and considers factors such as existing technology, presently enacted laws and regulations, and prior experience in remediation of contaminated sites. An environmental liability related to cleanup of a contaminated site might include, for exampl e, a provision for one or more of the following types of costs: site investigation and testing costs, cleanup costs, costs related to soil and water contamination resulting from tank ruptures, post-remediation monitoring costs, and outside legal fees. Thes e liabilities include costs related to other potentially responsible parties to the extent that we have reason to believe such parties will not fully pay their proportionate share. They do not take into account any claims for recoveries from insurance or o ther parties and are not discounted. As assessments and remediation progress at individual sites, the amount of projected cost is reviewed, and the liability is adjusted to reflect additional technical and legal information that becomes available. Managem ent has an established process in place to identify and monitor the Company’s environmental exposures. An environmental accrual analysis is prepared and maintained that lists all environmental loss contingencies, even where an accrual has not been establis hed. This analysis assists in monitoring the Company’s overall environmental exposure and serves as a tool to facilitate ongoing communication among the Company’s technical experts, environmental managers, environmental lawyers, and financial management to ensure that required accruals are recorded and potential exposures disclosed. Given inherent uncertainties in evaluating environmental exposures, actual costs to be incurred at identified sites in future periods may vary from the estimates. Refer to Note 17, Commitments and Contingencies, for additional information on the Company’s environmental loss contingencies. The accruals for environmental liabilities are reflected in the consolidated balance sheets, primarily as part of other noncurrent liabi lities.
Litigation	Litigation In the normal course of business, we are involved in legal proceedings. We accrue a liability for such matters when it is probable that a liability has been incurred and the amount can be reasonably estimated. When only a range of possible loss can be established, the most probable amount in the range is accrued. If no amount within this range is a better estimate than any other amount within the range, the minimum amount in the range is accrued. The accrual for a litigation loss contingency includes estimates of potential damages and other directly related costs expected to be incurred. Refer to Note 17, Commitments and Contingencies, for additional information on our cu rrent legal proceedings.
Share-Based Compensation	Share-Based Compensation We have various share-based compensation programs, which include deferred stock units, stock options, and restricted stock. We expense the grant-date fair value of these awards over the vesting period dur ing which employees perform related services. Expense recognition is accelerated for retirement-eligible individuals who would meet the requirements for vesting of awards upon their retirement. We utilize a Black Scholes model to value stock option awards . The grant-date fair value of the deferred stock units tied to a market condition is estimated using a Monte Carlo simulation model .
Income Taxes	Income Taxes We account for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the tax effects of temporary differences between the financial reporting and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to be recovered or settled . A principal temporary difference results from the excess of tax depreciation over book depreciation because accelerated methods of depreciation and shorter useful lives are used for income tax purposes. The cumulative impact of a change in tax rates or r egulations is included in income tax expense in the period that includes the enactment date. We recognize deferred tax assets net of existing valuation allowance to the extent we believe that these assets are more likely than not to be realized considering all available evidence. A tax benefit for an uncertain tax position is recognized when it is more likely than not that the position will be sustained upon examination based on its technical merits. This position is measured as the largest amount of tax be nefit that is greater than 50% likely of being realized. Interest and penalties related to unrecognized tax benefits are recognized as a component of income tax expense. For additional information regarding our income taxes, refer to Note 23, Income T axes.
Cash and Cash Items	Cash and Cash Items Cash and cash items include cash, time deposits, and certificates of deposit acquired with an original maturity of three months or less.
Trade Receivables,net	Trade Receivables, net Trade receivables comprise amounts owed to us through our operatin g activities and are presented net of allowances for doubtful accounts. The allowances for doubtful accounts represent estimated uncollectible receivables associated with potential customer defaults on contractual obligations. A provision for customer defa ults is made on a general formula basis when it is determined that the risk of some default is probable and estimable but cannot yet be associated with specific customers. The assessment of the likelihood of customer defaults is based on various factors, i ncluding the length of time the receivables are past due, historical experience, and existing economic conditions. The allowance also includes amounts for certain customers where a risk of default has been specifically identified, considering factors such as the financial condition of the customer and customer disputes over contractual terms and conditions. Allowance for doubtful accounts were $ 56.8 and $ 48.5 as of fiscal year end 30 September 2016 and 2015 , respectively. Provisions to the allowance for doubtful accounts charged against income were $ 22.8 , $ 26.3 and $ 16.4 in 2016 , 2015 , and 2014 , respectively .
Inventories	Inventories Inventories are stated at the lower of cost or market. We write down our inventories for est imated obsolescence or unmarketable inventory based upon assumptions about future demand and market conditions. We utilize the last-in, first-out (LIFO) method for determining the cost of inventories in t he United States for the Industrial Gases and the Materials Technologies segments. Inventories for these segments outside of the United States are accounted for on the first-in, first-out (FIFO) method, as the LIFO method is not generally permitted in the foreign jurisdictions where these segments operate. The invento ries of the Industrial Gases – Global and the Corporate and other segment s on a worldwide basis, as well as all other inventories, are accounted for on the FIFO basis. At the business segment level, inventories are recorded at FIFO and the LIFO pool adjustments are not alloca ted to the business segments.
Equity Investments	Equity Investments The equity method of accounting is used when we exercise significant influence but do not have operating control, generally assumed to be 20% –50% ownership. Under the equity method, original investments are recorded at cost and adjusted by our share of undistributed earnings or losses of these companies. Equity investments are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the in vestment may not be recoverable.
Plant and Equipment	Plant and Equipment Plant and equipment is stated at cost less accumulated depreciation. Construction costs, labor, and applicable overhead related to installations are capitalized. Expenditures for additions and improvements that extend t he lives or increase the capacity of plant assets are capitalized. The costs of maintenance and repairs of plant and equipment are charged to expense as incurred. Fully depreciated assets are retained in the gross plant and equipment and accumulated depre ciation accounts until they are removed from service. In the case of disposals, assets and related depreciation are removed from the accounts, and the net amounts, less proceeds from disposal, are included in income . Refer to Note 9, Plant and Equipm ent, net, for further detail.
Computer Software	Computer Software We capitalize costs incurred to purchase or develop software for internal use. Capitalized costs include purchased computer software packages, payments to vendors/consultants for development and implementat ion or modification to a purchased package to meet our requirements, payroll and related costs for employees directly involved in development, and interest incurred while software is being developed. Capitalized computer software costs are included in the balance sheet classification plant and equipment, net and depreciated over the estimated useful life of the software, generally a period of three to ten years.
Capitalized Interest	Capitalized Interest As we build new plant and equipment, we include in the cost of these asse ts a portion of the interest payments we make during the year. The amount of capitalized interest was $ 32.9 , $ 49.1 , and $ 33.0 in 2016 , 2015 , and 2014 , respectively.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets Long-lived assets ar e grouped for impairment testing at the lowest level for which there are identifiable cash flows that are largely independent of the cash flows of other assets and liabilities and are evaluated for impairment whenever events or changes in circumstances ind icate that the carrying amount of an asset group may not be recoverable. We assess recoverability by comparing the carrying amount of the asset group to estimated undiscounted future cash flows expected to be generated by the asset group. If an asset group is considered impaired, the impairment loss to be recognized is measured as the amount by which the asset group’s carrying amount exceeds its fair value. Long-lived assets to be sold are reported at the lower of carrying amount or fair value less cost to sell.
Asset Retirement Obligations	Asset Retirement Obligations The fair value of a liability for an asset retirement obligation is recognized in the period in which it is incurred. The fair value of the liability is measured using discounted estimated cash flows and is adjusted to its present value in subsequent periods as accretion expense is recorded. The corresponding asset retirement costs are capitalized as part of the carrying amount of the related long-lived asset and depreciated over the asset’s useful life. Our asset retire ment obligations are primarily associated with Industrial Gases on-site long-term supply contracts, under which we have built a facility on land owned by the customer and are obligated to remove the facility at the end of the contract term. Our asset retirement obligations totaled $ 1 19.9 and $ 109.4 a t 30 September 2016 and 2015 , respectively.
Goodwill	Goodwill Business combinations are accounted for using the acquisition method. The purchase price is allocated to the assets acquired and liabi lities assumed based on their estimated fair market values. Any excess purchase price over the fair market value of the net assets acquired, including identified intangibles, is recorded as goodwill. Preliminary purchase price allocations are made at the d ate of acquisition and finalized when information needed to affirm underlying estimates is obtained, within a maximum allocation period of one year. Goodwill is subject to impairment testing at least annually. In addition, goodwill is tested more frequent ly if a change in circumstances or the occurrence of events indicates that potential impairment exists. Refer to Note 10, Goodwill, for further detail.
Intangible Assets	Intangible Assets Intangible assets with determinable lives primarily consist of customer relati onships, purchased patents and technology, and land use rights. The cost of intangible assets with determinable lives is amortized on a straight-line basis over the estimated period of economic benefit. No residual value is estimated for these intangible a ssets. Indefinite-lived intangible assets consist of trade names and trademarks. Indefinite-lived intangibles are subject to impairment testing at least annually. In addition, intangible assets are tested more frequently if a change in circumstances or the occurrence of events indicates that potential impairment exists. Customer relationships are generally amortized over periods of five to twenty-five years. Purchased patents and technology and other are generally amortized over periods of five to twenty y ears. Land use rights, which are included in other intangibles, are generally amortized over a period of fifty years. Amortizable lives are adjusted whenever there is a change in the estimated period of economic benefit. Refer to Note 11, Intangible Assets, for further detail.
Retirement Benefits	Retirement Benefits The cost of pension benefits is recognized over the employees’ service period. We are required to use actuarial methods and assumptions in the valuation of defined benefit obligations and the determination o f expense. Differences between actual and expected results or changes in the value of obligations and plan assets are not recognized in earnings as they occur but, rather, systematically and gradually over subsequent periods. Refer to Note 16, Retirem ent Benefits, for disclosures related to our pension and other postretirement benefits.

Discontinued Operations (Tables

Discontinued Operations (Tables)	12 Months Ended
	Sep. 30, 2016
Discontinued Operations [Abstract]
Schedule of Operating Results and Assets and Liabilities of Discontinued Operations	The following table summarizes the carrying amount of the accrual for our actions to dispose of the EfW business at 30 September 2016, which is included in current liabilities of discontinued operations: Asset Contract Impairment Actions/Other Total Loss on disposal of business $ 913.5 $ 32.2 $ 945.7 Noncash expenses (913.5) - (913.5) Cash expenditures - (18.6) (18.6) Currency translation adjustment - (1.4) (1.4) 30 September 2016 $ - $ 12.2 $ 12.2 The results of EfW discontinued operations are summarized below: 2016 2015 2014 Loss before taxes $ (41.0) $ (9.2) $ (10.9) Income tax provision 3.4 2.4 3.4 Loss from operations of discontinued operations (37.6) (6.8) (7.5) Loss on disposal, net of tax (846.6) - - Loss from Discontinued Operations, net of tax $ (884.2) $ (6.8) $ (7.5) Assets and liabilities of the EfW discontinued operations consist of the following: 30 September 30 September 2016 2015 Plant and equipment $ 18.2 $ - Other current assets 1.2 1.8 Total Current Assets $ 19.4 $ 1.8 Plant and equipment $ - $ 891.8 Total Noncurrent Assets $ - $ 891.8 Payables and accrued liabilities $ 19.0 $ 17.0 Total Current Liabilities $ 19.0 $ 17.0 Other noncurrent liabilities $ - $ 2.5 Total Noncurrent Liabilities $ - $ 2.5 The results of the Homecare discontinued operations are summarized below: 2016 2015 2014 Sales $ - $ - $ 8.5 Income before taxes $ - $ - $ .7 Income tax provision - - - Income from operations of discontinued operations - - .7 Gain on sale of business, net of tax - - 3.9 Income (Loss) from Discontinued Operations, net of tax $ - $ - $ 4.6

Business Restructuring and Co39

Business Restructuring and Cost Reduction Actions (Tables)	12 Months Ended
	Sep. 30, 2016
Business Restructuring and Cost Reduction Actions [Abstract]
Summary of Carrying Amount of Accrual for Business Restructuring and Cost Reduction Actions [Table Text Block]	Severance and Other Benefits 2016 Charge $ 33.9 Amount reflected in pension liability (.9) Cash expenditures (20.4) Currency translation adjustment .3 30 September 2016 $ 12.9 The following table summarizes the carrying amount of the accrual for the business realignment and reorganization at 30 September 2016: Severance and Asset Other Benefits Actions/Other Total 2014 Charge $ 12.7 $ - $ 12.7 Cash expenditures (2.2) - (2.2) 30 September 2014 $ 10.5 $ - $ 10.5 2015 Charge 151.9 55.8 207.7 Amount reflected in pension liability (14.0) - (14.0) Noncash expenses - (47.4) (47.4) Cash expenditures (113.5) (1.2) (114.7) Currency translation adjustment (.4) - (.4) 30 September 2015 $ 34.5 $ 7.2 $ 41.7 Cash expenditures (34.1) (3.8) (37.9) Currency translation adjustment (.4) - (.4) 30 September 2016 $ - $ 3.4 $ 3.4

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Sep. 30, 2016
Inventories [Abstract]
Schedule of Inventory	30 September 2016 2015 Inventories at FIFO cost Finished goods $ 456.7 $ 494.9 Work in process 38.2 34.4 Raw materials, supplies and other 204.0 229.3 698.9 758.6 Less: Excess of FIFO cost over LIFO cost (79.0) (100.8) Inventories $ 619.9 $ 657.8

Summarized Financial Informat41

Summarized Financial Information of Equity Affiliates (Tables)	12 Months Ended
	Sep. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments [Table Text Block]	Abdullah Hashim Industrial Gases & Equipment Co., Ltd. (25%); INOX Air Products Limited (50%); Air Products South Africa (Proprietary) Limited (50%); Jazan Gas Projects Company (25%); Bangkok Cogeneration Company Limited (49%); Kulim Industrial Gases Sdn. Bhd. (50%); Bangkok Industrial Gases Co., Ltd. (49%); Sapio Produzione Idrogeno Ossigeno S.r.l. (49%); Chengdu Air & Gas Products Ltd. (50%); Tecnologia en Nitrogeno S. de R.L. de C.V. (50%); Helap S.A. (50%); Tyczka Industrie-Gases GmbH (50%); High-Tech Gases (Beijing) Co., Ltd. (50%); WuXi Hi-Tech Gas Co., Ltd. (50%); INFRA Group (40%); and principally, other industrial gas producers. 30 September 2016 2015 Current assets $ 1,449.8 $ 1,296.4 Noncurrent assets 3,063.9 2,607.4 Current liabilities 699.2 654.0 Noncurrent liabilities 1,540.6 988.0 Year Ended 30 September 2016 2015 2014 Net sales $ 2,308.5 $ 2,604.3 $ 2,808.7 Sales less cost of sales 882.6 949.2 984.7 Operating income 487.8 524.0 542.9 Net income 338.0 351.0 359.5

Plant and Equipment, net (Table

Plant and Equipment, net (Tables)	12 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	Useful Life 30 September in years 2016 2015 Land $ 232.9 $ 226.2 Buildings 30 1,119.8 1,080.2 Production facilities Industrial Gases – Regional (A) 10 to 20 12,372.1 11,873.8 Materials Technologies 10 to 15 859.2 902.7 Other 5 to 20 36.0 43.0 Total production facilities 13,267.3 12,819.5 Distribution and other machinery and equipment (B) 5 to 25 4,042.1 3,963.1 Construction in progress 1,528.0 1,373.8 Plant and equipment, at cost 20,190.1 19,462.8 Less: accumulated depreciation 11,337.4 10,717.7 Plant and equipment, net $ 8,852.7 $ 8,745.1 (A) Depreciable lives of production facilities related to long-term customer supply contracts are matched to the contract lives. (B) The depreciable lives for various types of distribution equipment are 10 to 25 years for cylinders, depending on the nature and properties of the product; 20 years for tanks; 7.5 years for customer stations; and 5 to 15 years for tractors and trailers.

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]	Industrial Industrial Industrial Industrial Gases– Gases– Gases– Gases– Materials Americas EMEA Asia Global Technologies Total Goodwill, net at 30 September 2014 $ 327.2 $ 433.3 $ 140.0 $ 21.4 $ 315.4 $ 1,237.3 Acquisitions and adjustments 2.2 3.2 - - - 5.4 Currency translation and other (31.8) (50.0) (6.9) (1.5) (21.2) (111.4) Goodwill, net at 30 September 2015 $ 297.6 $ 386.5 $ 133.1 $ 19.9 $ 294.2 $ 1,131.3 Currency translation and other 11.5 (5.9) 2.1 .3 10.9 18.9 Goodwill, net at 30 September 2016 $ 309.1 $ 380.6 $ 135.2 $ 20.2 $ 305.1 $ 1,150.2 30 September 2016 2015 2014 Goodwill, gross $ 1,408.8 $ 1,375.0 $ 1,522.1 Accumulated impairment losses (A) (258.6) (243.7) (284.8) Goodwill, net $ 1,150.2 $ 1,131.3 $ 1,237.3 (A) Amount is attributable to the Industrial Gases – Americas segment and includes currency translation of $46.6, $61.5, and $20.4 as of 30 September 2016, 2015, and 2014, respectively.

Intangibles (Tables)

Intangibles (Tables)	12 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule Finite and Indefinite Lived Intangible Assets [Table Text Block]	30 September 2016 30 September 2015 Accumulated Accumulated Amortization/ Amortization/ Gross Impairment Net Gross Impairment Net Customer relationships $ 517.4 $ (155.2) $ 362.2 $ 507.4 $ (129.6) $ 377.8 Patents and technology 76.6 (57.9) 18.7 76.9 (53.3) 23.6 Other 81.7 (37.3) 44.4 81.8 (35.0) 46.8 Total finite-lived intangibles 675.7 (250.4) 425.3 666.1 (217.9) 448.2 Trade names and trademarks, indefinite-lived 66.2 (3.5) 62.7 63.4 (3.3) 60.1 Total Intangible Assets $ 741.9 $ (253.9) $ 488.0 $ 729.5 $ (221.2) $ 508.3
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Projected annual amortization expense for intangible assets as of 30 September 2016 is as follows: 2017 $ 31.2 2018 29.5 2019 27.9 2020 27.5 2021 26.1 Thereafter 283.1 Total $ 425.3

Leases (Tables)

Leases (Tables)	12 Months Ended
	Sep. 30, 2016
Leases [Abstract]
Schedule Of Future Minimum Lease Payments For Capital Leases [Table Text Block]	Capital Leases 2017 $ 2.0 2018 1.8 2019 1.6 2020 1.6 2021 2.7 Thereafter 21.3 Total $ 31.0
Schedule Of Future Minimum Rental Payments For Operating Leases [Table Text Block]	Operating Leases 2017 $ 70.5 2018 62.5 2019 49.9 2020 38.4 2021 31.6 Thereafter 102.2 Total $ 355.1
Schedule of Minimum Lease Payments to be Collected [Table Text Block]	30 September 2016 2015 Gross minimum lease payments receivable $ 2,072.6 $ 2,322.5 Unearned interest income (762.7) (888.1) Lease Receivables, net $ 1,309.9 $ 1,434.4 2017 $ 182.7 2018 181.4 2019 175.9 2020 171.1 2021 165.1 Thereafter 1,196.4 Total $ 2,072.6

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
	Sep. 30, 2016
Financial Instruments [Abstract]
Schedule Of Notional Amounts Of Outstanding Derivatives	30 September 2016 30 September 2015 Years Years US$ Average US$ Average Notional Maturity Notional Maturity Forward Exchange Contracts Cash flow hedges $ 4,130.3 .5 $ 4,543.8 .5 Net investment hedges 968.2 2.7 491.3 4.0 Not designated 2,850.5 .4 863.3 .7 Total Forward Exchange Contracts $ 7,949.0 .7 $ 5,898.4 .9 The following table summarizes our outstanding interest rate management contracts and cross currency interest rate swaps: 30 September 2016 30 September 2015 Average Years Average Years US$ Receive Average US$ Receive Average Notional Pay % % Maturity Notional Pay % % Maturity Interest rate swaps (fair value hedge) $ 600.0 LIBOR 2.28% 2.3 $ 600.0 LIBOR 2.77% 3.3 Cross currency interest rate swaps (net investment hedge) $ 517.7 3.24% 2.43% 2.6 $ 609.9 4.06% 2.61% 3.2 Cross currency interest rate swaps (cash flow hedge) $ 1,088.9 4.77% 2.72% 3.3 $ 1,055.2 4.29% 2.63% 3.9 Cross currency interest rate swaps (not designated) $ 27.4 3.62% .81% 1.8 $ 12.9 3.12% 3.08% 4.1
Fair Value of Derivative Instruments	The table below summarizes the fair value and balance sheet location of our outstanding derivatives: Balance Sheet 30 September Balance Sheet 30 September Location 2016 2015 Location 2016 2015 Derivatives Designated as Hedging Instruments: Forward exchange contracts Other receivables $ 72.3 $ 52.1 Accrued liabilities $ 44.0 $ 110.7 Interest rate management contracts Other receivables 19.9 17.6 Accrued liabilities - - Other noncurrent Other noncurrent Forward exchange contracts assets 44.4 68.5 liabilities 9.1 9.2 Other noncurrent Other noncurrent Interest rate management contracts assets 160.0 153.4 liabilities 12.0 .8 Total Derivatives Designated as Hedging Instruments $ 296.6 $ 291.6 $ 65.1 $ 120.7 Derivatives Not Designated as Hedging Instruments: Forward exchange contracts Other receivables $ 78.7 $ 3.2 Accrued liabilities $ 30.0 $ 3.9 Other noncurrent Other noncurrent Forward exchange contracts assets - 23.3 liabilities - .6 Other noncurrent Other noncurrent Interest rate management contracts assets - .8 liabilities .7 - Total Derivatives Not Designated as Hedging Instruments $ 78.7 $ 27.3 $ 30.7 $ 4.5 Total Derivatives $ 375.3 $ 318.9 $ 95.8 $ 125.2
Schedule of Gain/Loss Related to Derivative Instruments	The table below summarizes the gain or loss related to our cash flow hedges, fair value hedges, net investment hedges, and derivatives not designated as hedging instruments: Year Ended 30 September Forward Foreign Currency Exchange Contracts Debt Other (A) Total 2016 2015 2016 2015 2016 2015 2016 2015 Cash Flow Hedges, net of tax: Net gain (loss) recognized in OCI (effective portion) $ 10.5 $ (44.9) $ - $ - $ 3.2 $ 9.9 $ 13.7 $ (35.0) Net (gain) loss reclassified from OCI to sales/cost of sales (effective portion) .2 .6 - - - - .2 .6 Net (gain) loss reclassified from OCI to other income (expense), net (effective portion) (25.7) 35.6 - - (20.3) (20.2) (46.0) 15.4 Net (gain) loss reclassified from OCI to interest expense (effective portion) 6.7 .7 - - 3.3 2.6 10.0 3.3 Net (gain) loss reclassified from OCI to other income (expense), net (ineffective portion) (.2) 1.5 - - - - (.2) 1.5 Fair Value Hedges: Net gain (loss) recognized in interest expense (B) $ - $ - $ - $ - $ (8.8) $ 9.9 $ (8.8) $ 9.9 Net Investment Hedges, net of tax: Net gain (loss) recognized in OCI $ 17.4 $ 60.1 $ (9.6) $ 91.4 $ 35.0 $ 49.5 $ 42.8 $ 201.0 Derivatives Not Designated as Hedging Instruments: Net gain (loss) recognized in other income (expense), net (C) $ (.8) $ (7.3) $ - $ - $ (1.6) $ .6 $ (2.4) $ (6.7) (A) Other includes the impact on other comprehensive income (OCI) and earnings primarily related to interest rate and cross currency interest rate swaps. (B) The impact of fair value hedges noted above was largely offset by recognized gains and losses resulting from the impact of changes in related interest rates on outstanding debt. (C) The impact of the non-designated hedges noted above was largely offset by recognized gains and losses resulting from the impact of changes in exchange rates on assets and liabilities denominated in nonfunctional currencies.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Sep. 30, 2016
Fair Value Measurements [Abstract]
Schedule of Carrying Value and Fair Values of Financial Instruments	The carrying values and fair values of financial instruments were as follows: 30 September 2016 30 September 2015 Carrying Value Fair Value Carrying Value Fair Value Assets Derivatives Forward exchange contracts $ 195.4 $ 195.4 $ 147.1 $ 147.1 Interest rate management contracts 179.9 179.9 171.8 171.8 Liabilities Derivatives Forward exchange contracts $ 83.1 $ 83.1 $ 124.4 $ 124.4 Interest rate management contracts 12.7 12.7 .8 .8 Long-term debt, including current portion 5,289.4 5,467.2 4,384.7 4,645.7
Schedule of Fair Value of Assets and Liabilities Measured On Recurring Basis	The following table summarizes assets and liabilities measured at fair value on a recurring basis in the consolidated balance sheets: 30 September 2016 30 September 2015 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Assets at Fair Value Derivatives Forward exchange contracts $ 195.4 $ - $ 195.4 $ - $ 147.1 $ - $ 147.1 $ - Interest rate management contracts 179.9 - 179.9 - 171.8 - 171.8 - Total Assets at Fair Value $ 375.3 $ - $ 375.3 $ - $ 318.9 $ - $ 318.9 $ - Liabilities at Fair Value Derivatives Forward exchange contracts $ 83.1 $ - $ 83.1 $ - $ 124.4 $ - $ 124.4 $ - Interest rate management contracts 12.7 - 12.7 - .8 - .8 - Total Liabilities at Fair Value $ 95.8 $ - $ 95.8 $ - $ 125.2 $ - $ 125.2 $ -
Schedule of Non-Recurring Fair Value Measurement of Long-Lived Assets Held For Sale	The following is a tabular presentation of nonrecurring fair value measurements along with the level within the fair value hierarchy in which the fair value measurement in its entirety falls: 31 March 2016 2016 Total Level 1 Level 2 Level 3 Loss Plant and Equipment—Discontinued operations (A) $ 20.0 $ - $ - $ 20.0 $ 913.5 (A) As a result of our exit from the Energy-from-Waste business, we assessed the recoverability of assets capable of being marketed on a secondary equipment market using an orderly liquidation valuation resulting in an impairment loss for the difference between the orderly liquidation value and net book value of the assets as of 31 March 2016. There have been no significant changes in the estimated net realizable value as of 30 September 2016. For additional information, see Note 4, Discontinued Operations.

Debt (Tables)

Debt (Tables)	12 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule of Debt [Table Text Block]	Total Debt 30 September 2016 2015 Short-term borrowings $ 935.8 $ 1,494.3 Current portion of long-term debt 371.3 435.6 Long-term debt 4,918.1 3,949.1 Total Debt $ 6,225.2 $ 5,879.0
Schedule of Short-term Debt [Table Text Block]	Short-term Borrowings 30 September 2016 2015 Bank obligations $ 133.1 $ 234.3 Commercial paper 802.7 1,260.0 Total Short-term Borrowings $ 935.8 $ 1,494.3
Schedule of Long-term Debt Instruments [Table Text Block]	Long-term Debt 30 September Fiscal Year Maturities 2016 2015 Payable in U.S. Dollars Debentures 8.75% 2021 $ 18.4 $ 18.4 Medium-term Notes (weighted average rate) Series D 7.3% 2016 - 32.1 Series E 7.6% 2026 17.2 17.2 Senior Notes Note 2.0% 2016 - 350.0 Note 1.2% 2018 400.0 400.0 Note 4.375% 2019 400.0 400.0 Note 3.0% 2022 400.0 400.0 Note 2.75% 2023 400.0 400.0 Note 3.35% 2024 400.0 400.0 Versum Financing Senior Note 5.5% 2024 425.0 - Term Loan B 3.346% 2023 575.0 - Other (weighted average rate) Variable-rate industrial revenue bonds .68% 2035 to 2050 769.9 769.9 Other 1.3% 2018 to 2019 25.7 35.0 Payable in Other Currencies Eurobonds 4.625% 2017 337.0 335.2 Eurobonds 2.0% 2020 337.0 335.2 Eurobonds 1.0% 2025 337.0 335.2 Eurobonds .375% 2021 393.2 - Other 4.4% 2016 to 2022 53.0 161.0 Capital Lease Obligations United States 5.0% 2018 .5 .7 Foreign 11.3% 2017 to 2036 9.7 1.1 Less: Unamortized Discount (9.2) (6.3) Total Long-term Debt 5,289.4 4,384.7 Less: Current portion of long-term debt (371.3) (435.6) Long-term Debt $ 4,918.1 $ 3,949.1
Schedule of Maturities of Long-term Debt [Table Text Block]	Maturities of long-term debt in each of the next five years and beyond are as follows: 2017 $ 371.3 2018 419.4 2019 406.6 2020 353.4 2021 416.9 Thereafter 3,321.8 Total $ 5,289.4

Retirement Benefits (Tables)

Retirement Benefits (Tables)	12 Months Ended
	Sep. 30, 2016
Pension Plans, Defined Benefit [Member]
Schedule of Net Periodic Benefit Cost	2016 2015 2014 U.S. International U.S. International U.S. International Service cost $ 36.5 $ 24.3 $ 42.2 $ 31.3 $ 42.6 $ 36.0 Interest cost 110.7 44.3 124.7 57.8 130.7 67.2 Expected return on plan assets (202.0) (78.3) (202.0) (79.8) (187.8) (78.1) Amortization Net actuarial loss 85.3 35.6 78.9 41.4 78.3 36.1 Prior service cost 2.8 (.2) 2.8 - 2.9 .2 Settlements 5.1 1.3 18.9 2.3 4.8 .7 Curtailments - (1.1) 5.3 - - - Special termination benefits 2.0 - 7.2 1.5 .2 .1 Other (.3) 2.1 1.0 2.1 - 2.0 Net Periodic Benefit Cost $ 40.1 $ 28.0 $ 79.0 $ 56.6 $ 71.7 $ 64.2
Weighted Average Assumptions Used In The Calculation Of Net Periodic Pension Cost And PBO	2016 2015 2014 U.S. International U.S. International U.S. International Discount rate (A) 4.3 % 3.3 % 4.3 % 3.6 % 4.8 % 4.3 % Expected return on plan assets 8.0 % 6.3 % 8.3 % 6.1 % 8.3 % 6.5 % Rate of compensation increase 3.5 % 3.5 % 3.5 % 3.6 % 4.0 % 3.7 % (A) Effective in 2016, the Company began to measure the service cost and interest cost components of pension expense by applying spot rates along the yield curve to the relevant projected cash flows, as we believe this provides a better measurement of these costs. The 2016 discount rates used to measure the service cost and interest cost of our U.S. pension plans were 4.5% and 4.1%, respectively. The rates used to measure the service cost and interest cost of our major International pension plans were 3.4% and 3.2%, respectively. The previous method would have used a single discount rate for both service and interest costs. The Company has accounted for this as a change in accounting estimate and, accordingly has accounted for it on a prospective basis. This change does not affect the measurement of the total benefit obligation. 2016 2015 U.S. International U.S. International Discount rate 3.5 % 2.0 % 4.4 % 3.4 % Rate of compensation increase 3.5 % 3.5 % 3.5 % 3.5 %
Schedule of Changes in Projected Benefit Obligations [Table Text Block]	2016 2015 U.S. International U.S. International Change in Projected Benefit Obligation Obligation at beginning of year $ 3,139.9 $ 1,647.9 $ 3,002.9 $ 1,735.7 Service cost 36.5 24.3 42.2 31.3 Interest cost 110.7 44.3 124.7 57.8 Amendments 1.2 - 1.2 (3.1) Actuarial loss 380.2 376.4 130.4 30.0 Curtailments (.4) (1.2) 5.3 (5.1) Settlement (gain) loss 5.4 (3.4) 6.7 (8.6) Special termination benefits 2.0 - 7.2 1.5 Participant contributions - 1.6 - 2.1 Benefits paid (197.4) (46.6) (181.8) (50.3) Currency translation/other (.4) (193.7) 1.1 (143.4) Obligation at End of Year $ 3,477.7 $ 1,849.6 $ 3,139.9 $ 1,647.9
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]	Change in Plan Assets Fair value at beginning of year $ 2,613.6 $ 1,302.8 $ 2,746.2 $ 1,368.4 Actual return on plan assets 275.2 273.2 (14.0) 25.9 Company contributions 13.9 65.4 63.1 74.4 Participant contributions - 1.6 - 2.1 Benefits paid (197.4) (46.6) (181.8) (50.3) Settlements - (3.4) - (8.6) Currency translation/other - (181.9) .1 (109.1) Fair Value at End of Year $ 2,705.3 $ 1,411.1 $ 2,613.6 $ 1,302.8 Funded Status at End of Year $ (772.4) $ (438.5) $ (526.3) $ (345.1)
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]	Amounts Recognized Noncurrent assets $ - $ - $ 4.0 $ .3 Accrued liabilities (24.1) - (15.7) - Noncurrent liabilities (748.3) (438.5) (514.6) (345.4) Net Amount Recognized $ (772.4) $ (438.5) $ (526.3) $ (345.1)
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	The changes in plan assets and benefit obligation that have been recognized in other comprehensive income on a pretax basis during 2016 and 2015 consist of the following: 2016 2015 U.S. International U.S. International Net actuarial loss arising during the period $ 311.8 $ 172.1 $ 351.8 $ 79.4 Amortization of net actuarial loss (90.4) (36.5) (97.8) (43.3) Prior service cost (credit) arising during the period 1.2 (.1) 1.2 (3.1) Amortization of prior service cost (2.8) .2 (2.8) - Total $ 219.8 $ 135.7 $ 252.4 $ 33.0
Schedule Of Components Recognized In Accumulated Other Comprehensive Income On Pretax Basis [Table Text Block]	The components recognized in accumulated other comprehensive loss on a pretax basis at 30 September consisted of: 2016 2015 U.S. International U.S. International Net actuarial loss $ 1,273.6 $ 769.6 $ 1,052.2 $ 634.0 Prior service cost 8.5 (1.9) 10.1 (2.0) Net transition liability - .4 - .4 Total $ 1,282.1 $ 768.1 $ 1,062.3 $ 632.4
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]	The amount of accumulated other comprehensive loss at 30 September 2016 that is expected to be recognized as a component of net periodic pension cost during fiscal year 2017, excluding amounts that may be recognized through settlement losses, is as follows: U.S. International Net actuarial loss $ 103.0 $ 58.3 Prior service cost 2.8 (.2)
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]	The following table provides information on pension plans where the benefit liability exceeds the value of plan assets: 30 September 2016 30 September 2015 U.S. International U.S. International Pension Plans with PBO in Excess of Plan Assets: PBO $ 3,477.7 $ 1,849.6 $ 2,917.1 $ 1,644.5 Fair value of plan assets 2,705.3 1,411.1 2,386.7 1,299.1 Pension Plans with ABO in Excess of Plan Assets: ABO $ 3,242.5 $ 1,673.6 $ 2,689.2 $ 1,498.0 Fair value of plan assets 2,705.3 1,370.1 2,386.7 1,263.2
Schedule Of Target And Actual Asset Allocations By Category [Table Text Block]	2016 Target Allocation 2016 Actual Allocation 2015 Actual Allocation U.S. International U.S. International U.S. International Asset Category Equity securities 60–80% 55–67% 65% 60% 68% 59% Debt securities 20–30% 32–43% 28% 38% 25% 40% Real estate/other 0–10% 0–2% 7% 1% 7% 0% Cash — — 0% 1% 0% 1% Total 100% 100% 100% 100%
Schedule of Allocation of Plan Assets [Table Text Block]	The following table summarizes pension plan assets measured at fair value by asset class (see Note 14, Fair Value Measurements, for definition of the levels): 30 September 2016 30 September 2015 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 U.S. Qualified Pension Plans Cash and cash equivalents $ 12.7 $ 12.7 $ - $ - $ 11.1 $ 11.1 $ - $ - Equity securities 637.0 637.0 - - 681.7 681.7 - - Equity mutual funds 300.2 300.2 - - 480.1 480.1 - - Equity pooled funds 815.5 - 815.5 - 615.1 - 615.1 - Fixed income: Bonds (government and corporate) 747.8 - 747.8 - 651.4 - 651.4 - Real estate pooled funds 192.1 - - 192.1 174.2 - - 174.2 Total U.S. Qualified Pension Plans $ 2,705.3 $ 949.9 $ 1,563.3 $ 192.1 $ 2,613.6 $ 1,172.9 $ 1,266.5 $ 174.2 International Pension Plans Cash and cash equivalents $ 6.6 $ 6.6 $ - $ - $ 10.1 $ 10.1 $ - $ - Equity pooled funds 854.8 - 854.8 - 766.9 - 766.9 - Fixed income pooled funds 486.9 - 486.9 - 465.6 - 465.6 - Other pooled funds 17.0 - 9.7 7.3 14.9 - 8.3 6.6 Insurance contracts 45.8 - - 45.8 45.3 - - 45.3 Total International Pension Plans $ 1,411.1 $ 6.6 $ 1,351.4 $ 53.1 $ 1,302.8 $ 10.1 $ 1,240.8 $ 51.9
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]	The following table summarizes changes in fair value of the pension plan assets classified as Level 3, by asset class: Real Estate Other Insurance Pooled Funds Pooled Funds Contracts Total 30 September 2014 $ 150.2 $ 9.3 $ 59.7 $ 219.2 Actual return on plan assets: Assets held at end of year 24.0 (.2) (11.1) 12.7 Assets sold during the period - .5 - .5 Purchases, sales, and settlements, net - (3.0) (3.3) (6.3) 30 September 2015 $ 174.2 $ 6.6 $ 45.3 $ 226.1 Actual return on plan assets: Assets held at end of year 17.9 .1 3.2 21.2 Assets sold during the period - .3 - .3 Purchases, sales, and settlements, net - .3 (2.7) (2.4) 30 September 2016 $ 192.1 $ 7.3 $ 45.8 $ 245.2
Schedule of Expected Benefit Payments [Table Text Block]	Projected benefit payments, which reflect expected future service, are as follows: U.S. International 2017 $ 150.3 $ 45.7 2018 152.7 48.3 2019 157.2 50.2 2020 161.8 51.1 2021 166.7 54.3 2022–2026 909.6 306.9
Other Postretirement Benefits [Member]
Schedule of Net Periodic Benefit Cost	The cost of our other postretirement benefit plans includes the following components: 2016 2015 2014 Service cost $ 2.2 $ 2.8 $ 3.3 Interest cost 2.0 2.2 2.3 Amortization of net actuarial loss .7 .8 1.7 Net Periodic Postretirement Cost $ 4.9 $ 5.8 $ 7.3
Schedule of Changes in Projected Benefit Obligations [Table Text Block]	2016 2015 Obligation at beginning of year $ 86.9 $ 93.5 Service cost 2.2 2.8 Interest cost 2.0 2.2 Actuarial loss (gain) 7.5 (2.3) Benefits paid (12.3) (9.3) Obligation at End of Year $ 86.3 $ 86.9
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]	Amounts Recognized Accrued liabilities $ 11.4 $ 10.4 Noncurrent liabilities 74.9 76.5
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	The changes in benefit obligation that have been recognized in other comprehensive income on a pretax basis during 2016 and 2015 for our other postretirement benefit plans consist of the following: 2016 2015 Net actuarial loss (gain) arising during the period $ 7.5 $ (2.3) Amortization of net actuarial loss (.7) (.8) Total $ 6.8 $ (3.1)
Schedule of Expected Benefit Payments [Table Text Block]	Projected benefit payments are as follows: 2017 $ 11.5 2018 11.0 2019 10.7 2020 10.2 2021 9.7 2022–2026 35.3

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Sep. 30, 2016
Commitments And Contingencies [Abstract]
Schedule of Change in Asset Retirement Obligation [Table Text Block]	Changes to the carrying amount of our asset retirement obligations are as follows: Balance at 30 September 2014 $ 94.0 Additional accruals 17.6 Liabilities settled (3.6) Accretion expense 4.7 Currency translation adjustment (3.3) Balance at 30 September 2015 $ 109.4 Additional accruals 10.4 Liabilities settled (4.4) Accretion expense 5.4 Currency translation adjustment (.9) Balance at 30 September 2016 $ 119.9 These obligations are primarily reflected in other noncurrent liabilities on the consolidated balance sheets.
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]	We are obligated to make future payments under unconditional purchase obligations as summarized below: 2017 $ 942 2018 525 2019 307 2020 298 2021 276 Thereafter 2,983 Total $ 5,331

Capital Stock (Tables)

Capital Stock (Tables)	12 Months Ended
	Sep. 30, 2016
Capital Stock [Abstract]
Schedule of Common Stock Outstanding Roll Forward [Table Text Block]	The following table reflects the changes in common shares: Year ended 30 September 2016 2015 2014 Number of Common Shares Outstanding Balance, beginning of year 215,359,113 213,538,144 211,179,257 Issuance of treasury shares for stock option and award plans 1,991,712 1,820,969 2,358,887 Balance, end of year 217,350,825 215,359,113 213,538,144

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Sep. 30, 2016
Share-Based Compensation [Abstract]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	Share-based compensation cost recognized in the consolidated income statements is summarized below: 2016 2015 2014 Before-Tax Share-Based Compensation Cost $ 37.6 $ 45.7 $ 44.0 Income tax benefit (13.1) (16.0) (15.6) After-Tax Share-Based Compensation Cost $ 24.5 $ 29.7 $ 28.4
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	Total before-tax share-based compensation cost by type of program was as follows: 2016 2015 2014 Deferred stock units $ 29.9 $ 28.8 $ 20.2 Stock options 4.2 12.6 21.6 Restricted stock 3.5 4.3 2.2 Before-Tax Share-Based Compensation Cost $ 37.6 $ 45.7 $ 44.0
Schedule Of Share Based Payment Award Equity Instruments Other Than Options Valuation Assumptions [Table Text Block]	2016 2015 Expected volatility 20.5 % 19.6 % Risk-free interest rate 1.2 % .9 % Expected dividend yield 2.2 % 2.5 %
Schedule of Deferred Stock Units and Restricted Stock Activity [Table Text Block]	Weighted Average Deferred Stock Units Shares (000) Grant-Date Fair Value Outstanding at 30 September 2015 1,056 $ 102.01 Granted 284 136.37 Paid out (299) 77.81 Forfeited/adjustments (40) 90.83 Outstanding at 30 September 2016 1,001 $ 119.44 Weighted Average Restricted Stock Shares (000) Grant-Date Fair Value Outstanding at 30 September 2015 83 $ 121.17 Granted 33 138.00 Vested (31) 119.95 Outstanding at 30 September 2016 85 $ 128.16
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	2015 2014 Expected volatility 30.3 % 29.8%–31.1 % Expected dividend yield 2.6 % 2.4–2.9 % Expected life (in years) 7.5 6.5–8.4 Risk-free interest rate 2.2 % 2.0%–2.7 %
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	A summary of stock option activity is presented below: Weighted Average Stock Options Shares (000) Exercise Price Outstanding at 30 September 2015 5,725 $ 87.35 Granted - - Exercised (1,783) 80.66 Forfeited (26) 106.52 Outstanding at 30 September 2016 3,916 $ 90.28 Exercisable at 30 September 2016 3,537 $ 86.99 Weighted Average Remaining Contractual Aggregate Intrinsic Stock Options Terms (in years) Value Outstanding at 30 September 2016 5.0 $ 235 Exercisable at 30 September 2016 4.7 $ 224

Accumulated Other Comprehensi53

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Sep. 30, 2016
Accumulated Other Comprehensive Loss Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The table below summarizes changes in accumulated other comprehensive loss (AOCL), net of tax, attributable to Air Products: Net loss on derivatives qualifying as hedges Foreign currency translation adjustments Pension and postretirement benefits Total Balance at 30 September 2013 $ (4.1) $ (61.5) $ (955.0) $ (1,020.6) Other comprehensive income (loss) before reclassifications (15.2) (213.1) (74.2) (302.5) Amounts reclassified from AOCL (9.1) - 84.7 75.6 Net current period other comprehensive income (loss) $ (24.3) $ (213.1) $ 10.5 $ (226.9) Amount attributable to noncontrolling interest .1 (5.9) .2 (5.6) Balance at 30 September 2014 $ (28.5) $ (268.7) $ (944.7) $ (1,241.9) Other comprehensive income (loss) before reclassifications (35.0) (699.3) (278.5) (1,012.8) Amounts reclassified from AOCL 20.8 - 97.0 117.8 Net current period other comprehensive income (loss) $ (14.2) $ (699.3) $ (181.5) $ (895.0) Amount attributable to noncontrolling interest .2 (11.5) .3 (11.0) Balance at 30 September 2015 $ (42.9) $ (956.5) $ (1,126.5) $ (2,125.9) Other comprehensive income (loss) before reclassifications 13.7 9.9 (335.1) (311.5) Amounts reclassified from AOCL (36.0) 2.7 87.2 53.9 Net current period other comprehensive income (loss) $ (22.3) $ 12.6 $ (247.9) $ (257.6) Amount attributable to noncontrolling interest (.2) 5.4 (.4) 4.8 Balance at 30 September 2016 $ (65.0) $ (949.3) $ (1,374.0) $ (2,388.3)
Schedule Of Reclassification Out Of Accumulated Other Comprehensive Income [Table Text Block]	The table below summarizes the reclassifications out of accumulated other comprehensive loss and the affected line item on the consolidated income statements: 2016 2015 2014 (Gain) Loss on Cash Flow Hedges, net of tax Sales/Cost of sales $ .2 $ .6 $ .7 Other income (expense), net (46.2) 16.9 (8.7) Interest expense 10.0 3.3 (1.1) Total (Gain) Loss on Cash Flow Hedges, net of tax $ (36.0) $ 20.8 $ (9.1) Currency Translation Adjustment (A) $ 2.7 $ ― $ ― Pension and Postretirement Benefits, net of tax (B) $ 87.2 $ 97.0 $ 84.7 (A) The impact is reflected in Other income (expense), net and primarily relates to the sale of an equity affiliate in the first quarter of 2016. Refer to Note 8, Summarized Financial Information of Equity Affiliates. (B) The components include items such as prior service cost amortization, actuarial loss amortization, and settlements and are reflected in net periodic benefit cost. Refer to Note 16, Retirement Benefits.

Noncontrolling Interests (Table

Noncontrolling Interests (Tables)	12 Months Ended
	Sep. 30, 2016
Noncontrolling Interests
Redeemable Noncontrolling Interest Rollforward	The following is a summary of the changes in redeemable noncontrolling interest for the year ended 30 September 2015: Balance at 30 September 2014 $ 287.2 Net income 11.5 Dividends (2.0) Purchase of noncontrolling interest (277.9) Currency translation adjustment (18.8) Balance at 30 September 2015 $ -

Earnings per Share (Tables)

Earnings per Share (Tables)	12 Months Ended
	Sep. 30, 2016
Earnings Per Share
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic and diluted earnings per share (EPS): 30 September 2016 2015 2014 Numerator Income from continuing operations $ 1,515.3 $ 1,284.7 $ 994.6 Income (Loss) from discontinued operations (884.2) (6.8) (2.9) Net Income Attributable to Air Products $ 631.1 $ 1,277.9 $ 991.7 Denominator (in millions) Weighted average common shares — Basic 216.4 214.9 212.7 Effect of dilutive securities Employee stock option and other award plans 1.9 2.4 2.5 Weighted average common shares — Diluted 218.3 217.3 215.2 Basic EPS Attributable to Air Products Income from continuing operations $ 7.00 $ 5.98 $ 4.68 Income (Loss) from discontinued operations (4.08) (.03) (.02) Net Income Attributable to Air Products $ 2.92 $ 5.95 $ 4.66 Diluted EPS Attributable to Air Products Income from continuing operations $ 6.94 $ 5.91 $ 4.62 Income (Loss) from discontinued operations (4.05) (.03) (.01) Net Income Attributable to Air Products $ 2.89 $ 5.88 $ 4.61

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	The following table summarizes the income of U.S. and foreign operations before taxes: 2016 2015 2014 Income from Continuing Operations before Taxes United States $ 897.5 $ 742.0 $ 562.2 Foreign 1,086.1 846.2 651.8 Income from equity affiliates 148.6 154.5 151.4 Total $ 2,132.2 $ 1,742.7 $ 1,365.4
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The following table shows the components of the provision for income taxes: 2016 2015 2014 Current Tax Provision Federal $ 237.9 $ 177.1 $ 19.3 State 29.1 16.9 13.0 Foreign 256.6 221.4 211.6 523.6 415.4 243.9 Deferred Tax Provision Federal 42.2 (3.5) 98.2 State 3.6 19.1 (2.7) Foreign 17.1 (12.7) 30.0 62.9 2.9 125.5 Income Tax Provision $ 586.5 $ 418.3 $ 369.4
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the differences between the United States federal statutory tax rate and the effective tax rate is as follows: (Percent of income before taxes) 2016 2015 2014 U.S. federal statutory tax rate 35.0 % 35.0 % 35.0 % State taxes, net of federal benefit 1.1 1.0 .5 Income from equity affiliates (2.4) (3.0) (3.9) Foreign tax differentials (7.0) (6.6) (8.2) U.S. taxes on foreign earnings (2.3) (1.6) (1.7) Domestic production activities (.8) (.9) (.7) Non-deductible goodwill impairment charge ― ― 8.0 Non-U.S. subsidiary tax election ― ― (3.8) Business separation costs 3.1 .2 ― Other (A) .8 (.1) 1.9 Effective Tax Rate 27.5 % 24.0 % 27.1 % (A) Other includes the impact of Chilean tax rate changes of 1.5% in 2014.
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	The significant components of deferred tax assets and liabilities are as follows: 30 September 2016 2015 Gross Deferred Tax Assets Retirement benefits and compensation accruals $ 537.9 $ 468.7 Tax loss carryforwards 93.0 116.7 Tax credits and other tax carryforwards 56.0 43.8 Reserves and accruals 80.1 71.9 Partnership and other investments 4.8 6.2 Other 45.8 66.3 Valuation allowance (155.2) (103.6) Deferred Tax Assets 662.4 670.0 Gross Deferred Tax Liabilities Plant and equipment 1,034.8 1,124.6 Currency gains 46.4 65.7 Unremitted earnings of foreign entities 5.4 62.7 Intangible assets 134.1 135.6 Other 16.1 2.1 Deferred Tax Liabilities 1,236.8 1,390.7 Net Deferred Income Tax Liability $ 574.4 $ 720.7
Schedule Of Deferred Tax Assets And Liabilities Included In Consolidated Financial Statements [Table Text Block]	Deferred tax assets and liabilities are included within the consolidated financial statements as follows: 2016 2015 Deferred Tax Assets Other noncurrent assets $ 192.7 $ 82.7 Deferred Tax Liabilities Deferred income taxes 767.1 803.4 Net Deferred Income Tax Liability $ 574.4 $ 720.7
Summary of Income Tax Contingencies [Table Text Block]	A reconciliation of the beginning and ending amount of the unrecognized tax benefits is as follows: Unrecognized Tax Benefits 2016 2015 2014 Balance at beginning of year $ 97.5 $ 108.7 $ 124.3 Additions for tax positions of the current year 15.0 6.9 8.1 Additions for tax positions of prior years 3.8 7.5 4.9 Reductions for tax positions of prior years (.3) (7.9) (14.6) Settlements (5.6) (.6) ― Statute of limitations expiration (3.0) (11.2) (14.0) Foreign currency translation (.5) (5.9) ― Balance at End of Year $ 106.9 $ 97.5 $ 108.7
Summary of Income Tax Examinations [Table Text Block]	We generally remain subject to examination in the following major tax jurisdictions for the years indicated below: Major Tax Jurisdiction Open Tax Years North America United States 2011–2016 Canada 2012–2016 Europe France 2013–2016 Germany 2011–2016 Netherlands 2011–2016 Spain 2011–2016 United Kingdom 2013–2016 Asia China 2010–2016 Singapore 2010–2016 South Korea 2010–2016 Taiwan 2011–2016 Latin America Chile 2013–2016

Supplemental Information (Table

Supplemental Information (Tables)	12 Months Ended
	Sep. 30, 2016
Supplemental Information [Abstract]
Schedule Of Other Receivables And Other Current Assets [Table Text Block]	Other Receivables and Current Assets 30 September 2016 2015 Derivative instruments $ 170.9 $ 72.9 Other receivables 197.5 167.6 Current capital lease receivables 88.2 84.2 Prepaid inventory 92.8 - Other 6.2 18.8 $ 555.6 $ 343.5
Schedule of Other Assets, Noncurrent [Table Text Block]	Other Noncurrent Assets 30 September 2016 2015 Derivative instruments $ 204.4 $ 246.0 Other long-term receivables 20.6 21.4 Deferred financing cost, net 29.6 20.2 Prepaid tax 53.5 31.3 Deferred tax assets 192.7 82.7 Deposits 36.5 40.1 Other 200.0 206.9 $ 737.3 $ 648.6
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	Payables and Accrued Liabilities 30 September 2016 2015 Trade creditors $ 676.1 $ 621.9 Customer advances 376.1 195.3 Accrued payroll and employee benefits 262.6 272.9 Pension and postretirement benefits 35.5 26.1 Dividends payable 186.9 174.4 Outstanding payments in excess of certain cash balances 11.9 27.5 Accrued interest expense 47.9 52.9 Derivative instruments 74.0 114.6 Severance and other costs associated with business restructuring and cost reduction actions 16.3 41.7 Other 123.3 114.4 $ 1,810.6 $ 1,641.7 Other Noncurrent Liabilities
Schedule Of Other Liabilities Noncurrent [Table Text Block]	Pension benefits $ 1,186.8 $ 860.0 Postretirement benefits 74.9 76.5 Other employee benefits 108.3 106.7 Contingencies related to uncertain tax positions 95.6 91.1 Advance payments 43.8 135.1 Environmental liabilities 70.3 71.6 Derivative instruments 21.8 10.6 Asset retirement obligations 116.1 106.5 Obligation for future contribution to an equity affiliate 94.4 67.5 Other 61.4 28.4 $ 1,873.4 $ 1,554.0
Schedule Of Other Income Expense Net [Table Text Block]	Other Income (Expense), Net 30 September 2016 2015 2014 Technology and royalty income $ 20.1 $ 25.0 $ 26.8 Interest income 6.2 4.6 9.4 Foreign exchange (5.8) (22.3) (7.7) Sale of assets and investments 10.1 37.1 12.5 Contract settlements 12.6 ― 2.8 Other 14.9 2.9 9.0 $ 58.1 $ 47.3 $ 52.8

Summary by Quarter (Unaudited)

Summary by Quarter (Unaudited) (Tables)	12 Months Ended
	Sep. 30, 2016
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information [Table Text Block]	These tables summarize the unaudited results of operations for each quarter of 2016 and 2015: 2016 Q1 Q2 Q3 Q4 Total Sales $ 2,355.8 $ 2,271.2 $ 2,434.4 $ 2,463.0 $ 9,524.4 Gross profit (A) 760.1 752.2 795.1 814.3 3,121.7 Business separation costs (B) 12.0 7.4 9.5 23.3 52.2 Business restructuring and cost reduction actions (C) - 8.6 14.2 11.1 33.9 Pension settlement loss (D) - 2.6 1.0 2.8 6.4 Operating income (A) 510.6 513.3 535.1 547.0 2,106.0 Loss on extinguishment of debt (E) - - - 6.9 6.9 Income tax provision 135.9 132.5 (F) 179.5 (F) 138.6 (F) 586.5 (F) Net income (loss) 372.0 (465.5) 354.1 400.9 661.5 Net income attributable to Air Products Income from continuing operations 377.8 379.8 355.7 402.0 1,515.3 Loss from discontinued operations (14.2) (853.1) (8.9) (8.0) (884.2) Net income (loss) attributable to Air Products 363.6 (473.3) 346.8 394.0 631.1 Basic Earnings Per Common Share Attributable to Air Products Income from continuing operations 1.75 1.76 1.64 1.85 7.00 Loss from discontinued operations (.07) (3.95) (.04) (.04) (4.08) Net income (loss) attributable to Air Products 1.68 (2.19) 1.60 1.81 2.92 Diluted Earnings Per Common Share Attributable to Air Products Income from continuing operations 1.73 1.74 1.63 1.84 6.94 Loss from discontinued operations (.06) (3.91) (.04) (.04) (4.05) Net income (loss) attributable to Air Products 1.67 (2.17) 1.59 1.80 2.89 Dividends declared per common share .81 .86 .86 .86 3.39 Market price per common share: High 143.83 147.16 152.16 157.84 Low 126.65 114.64 134.15 137.31 2015 Q1 Q2 Q3 Q4 Total Sales $ 2,560.8 $ 2,414.5 $ 2,470.2 $ 2,449.4 $ 9,894.9 Gross profit 731.1 716.3 755.0 753.5 2,955.9 Business separation costs (B) - - - 7.5 7.5 Business restructuring and cost reduction actions (C) 32.4 55.4 58.2 61.7 207.7 Pension settlement loss (D) - 12.6 1.6 7.0 21.2 Gain on previously held equity interest (G) 17.9 - - - 17.9 Gain on land sales (H) - - - 33.6 33.6 Operating income 432.3 376.9 424.8 474.3 1,708.3 Loss on extinguishment of debt (E) - - - 16.6 16.6 Income tax provision 107.1 87.7 104.1 119.4 418.3 Net income 337.5 296.9 333.2 350.0 1,317.6 Net income attributable to Air Products Income from continuing operations 326.3 291.9 320.5 346.0 1,284.7 Loss from discontinued operations (1.7) (1.9) (1.7) (1.5) (6.8) Net income attributable to Air Products 324.6 290.0 318.8 344.5 1,277.9 Basic Earnings Per Common Share Attributable to Air Products Income from continuing operations 1.53 1.36 1.49 1.61 5.98 Loss from discontinued operations (.01) (.01) (.01) (.01) (.03) Net income attributable to Air Products 1.52 1.35 1.48 1.60 5.95 Diluted Earnings Per Common Share Attributable to Air Products Income from continuing operations 1.51 1.34 1.48 1.59 5.91 Loss from discontinued operations (.01) (.01) (.01) (.01) (.03) Net income attributable to Air Products 1.50 1.33 1.47 1.58 5.88 Dividends declared per common share .77 .81 .81 .81 3.20 Market price per common share: High 149.61 158.20 153.93 148.56 Low 118.20 137.07 136.69 123.66 (A) Changes in estimates on projects accounted for under the percentage of completion method favorably impacted income by approximately $20 in fiscal year 2016, primarily during the fourth quarter. For additional information, see Note 1, Major Accounting Policies (Revenue Recognition). (B) For additional information, see Note 3, Materials Technologies Separation. (C) For additional information, see Note 5, Business Restructuring and Cost Reduction Actions. (D) For additional information, see Note 16, Retirement Benefits. (E) For additional information, see Note 15, Debt. (F) Includes income tax expense for tax costs associated with business separation. For additional information, see Note 3, Materials Technologies Separation. (G) For additional information, see Note 6, Business Combination. (H) The gain is reflected on the consolidated income statements in “Other income (expense), net.” For additional information, see Note 24, Supplemental Information.

Business Segment and Geograph59

Business Segment and Geographic Information (Tables)	12 Months Ended
	Sep. 30, 2016
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Business Segment Industrial Industrial Industrial Industrial Gases– Gases– Gases– Gases– Materials Corporate Segment Americas EMEA Asia Global Technologies and other Total 2016 Sales to external customers $ 3,343.6 $ 1,700.3 $ 1,716.1 $ 498.8 $ 2,019.5 $ 246.1 $ 9,524.4 Operating income (loss) 895.2 382.8 449.1 (21.3) 530.2 (37.5) 2,198.5 Depreciation and amortization 442.5 185.7 197.1 7.9 77.4 15.3 925.9 Equity affiliates' income (loss) 52.7 36.5 57.8 (.1) 1.7 - 148.6 Expenditures for long-lived assets 406.6 159.5 313.3 6.0 147.9 22.5 1,055.8 Investments in net assets of and advances to equity affiliates 250.6 580.5 442.5 10.0 4.5 - 1,288.1 Total assets 5,889.2 3,178.6 4,232.7 367.6 1,787.0 2,580.8 18,035.9 2015 Sales to external customers $ 3,693.9 $ 1,864.9 $ 1,637.5 $ 286.8 $ 2,087.1 $ 324.7 $ 9,894.9 Operating income (loss) 808.4 330.7 380.5 (51.6) 476.7 (51.5) 1,893.2 Depreciation and amortization 416.9 194.3 202.9 16.5 92.8 13.0 936.4 Equity affiliates' income (loss) 64.6 42.4 46.1 (.8) 2.2 - 154.5 Expenditures for long-lived assets 414.5 215.6 402.5 94.8 102.5 35.7 1,265.6 Investments in net assets of and advances to equity affiliates 249.7 564.1 421.7 14.3 15.9 - 1,265.7 Total assets 5,774.9 3,323.9 4,154.0 370.5 1,741.9 1,075.7 16,440.9 2014 Sales to external customers $ 4,078.5 $ 2,150.7 $ 1,527.0 $ 296.0 $ 2,064.6 $ 322.2 $ 10,439.0 Operating income (loss) 762.6 351.2 310.4 (57.3) 379.0 (78.5) 1,667.4 Depreciation and amortization 414.4 220.2 205.3 7.1 99.1 10.8 956.9 Equity affiliates' income 60.9 44.1 38.0 5.8 2.6 - 151.4 Expenditures for long-lived assets 484.2 239.1 430.3 77.7 64.2 67.2 1,362.7 Investments in net assets of and advances to equity affiliates 234.3 552.9 434.1 18.8 17.8 - 1,257.9 Total assets 6,240.7 3,521.0 4,045.6 389.4 1,835.7 1,044.5 17,076.9
Reconciliation of Segments to Consolidated Operating Income [Table Text Block]	Below is a reconciliation of segment total operating income to consolidated operating income: Operating Income 2016 2015 2014 Segment total $ 2,198.5 $ 1,893.2 $ 1,667.4 Business separation costs (52.2) (7.5) - Business restructuring and cost reduction actions (33.9) (207.7) (12.7) Pension settlement loss (6.4) (21.2) (5.5) Goodwill and intangible asset impairment charge - - (310.1) Gain on previously held equity interest - 17.9 - Gain on land sales (A) - 33.6 - Consolidated Total $ 2,106.0 $ 1,708.3 $ 1,339.1 (A) Reflected on the consolidated income statements in "Other income (expense), net."
Reconciliation of Assets from Segment to Consolidated [Table TextBlock]	Below is a reconciliation of segment total assets to consolidated total assets: Total Assets 2016 2015 2014 Segment total $ 18,035.9 $ 16,440.9 $ 17,076.9 Discontinued operations 19.4 893.6 591.4 Consolidated Total $ 18,055.3 $ 17,334.5 $ 17,668.3
Segments, Geographical Areas [Abstract]
Schedule Of Revenues From External Customers And Long Lived Assets By Geographical Areas [TableTextBlock]	Sales to External Customers 2016 2015 2014 United States $ 3,792.3 $ 4,280.1 $ 4,507.6 Canada 225.7 247.1 311.4 Europe 2,505.9 2,315.4 2,628.0 Asia, excluding China 1,382.7 1,395.2 1,389.4 China 1,176.2 1,129.1 981.0 Latin America 441.6 528.0 621.6 Total $ 9,524.4 $ 9,894.9 $ 10,439.0 Long-Lived Assets (A) 2016 2015 2014 United States $ 3,780.2 $ 3,788.5 $ 3,754.2 Canada 639.0 577.4 518.0 Europe 1,306.1 1,395.0 1,656.7 Asia, excluding China 1,056.5 914.2 989.9 China 1,721.9 1,732.7 1,582.7 Latin America 349.0 337.3 440.1 Total $ 8,852.7 $ 8,745.1 $ 8,941.6 (A) Long-lived assets include plant and equipment, net.

Major Accounting Policies (Narr

Major Accounting Policies (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Allowance for credit losses - capital leases	$ 0				$ 0				$ 0	$ 0
Environmental expenditures									27	28.3	$ 35.1
Allowance for Doubtful Accounts	56.8				48.5				56.8	48.5
Provision for Doubtful Accounts									22.8	26.3	16.4
Capitalized interest	32.9				49.1				32.9	49.1	33
Asset retirement obligations	119.9				109.4				$ 119.9	109.4	94
Period for reallocation of purchase price									1 year
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Residual Value	0								$ 0
Change in Accounting Estimate [Line Items]
Operating income (loss)	$ 547	$ 535.1	$ 513.3	$ 510.6	$ 474.3	$ 424.8	$ 376.9	$ 432.3	$ 2,106	$ 1,708.3	$ 1,339.1
Computer Software [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									3 years
Computer Software [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									10 years
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									5 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									25 years
Patents and Technology [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									5 years
Patents and Technology [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									20 years
Land Use Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									50 years
Contracts accounted for under percentage of completion
Change in Accounting Estimate [Line Items]
Operating income (loss)									$ 20

New Accounting Guidance (Narrat

New Accounting Guidance (Narratives) (Details) - Accounting Standards Update 2015-17 $ in Millions	12 Months Ended
	Sep. 30, 2015USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in noncurrent deferred tax assets	$ 13.7
Decrease in noncurrent deferred tax liabilities	$ 99.9

Business Separation (Narrative)

Business Separation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions

3 Months Ended

12 Months Ended

Sep. 30, 2016

Jun. 30, 2016

Mar. 31, 2016

Dec. 31, 2015

Sep. 30, 2015

Jun. 30, 2015

Mar. 31, 2015

Dec. 31, 2014

Sep. 30, 2016

Sep. 30, 2015

Sep. 30, 2014

May 06, 2016

Restructuring Cost and Reserve [Line Items]

Definitive agreement expected cash consideration

$ 3,800

Business separation costs, before tax

$ 23.3

[1]

$ 9.5

[1]

$ 7.4

[1]

$ 12

[1]

$ 7.5

[1]

$ 0

[1]

$ 0

[1]

$ 0

[1]

$ 52.2

[1]

$ 7.5

[1]

$ 0

Business separation costs, after tax

$ 48.3

Business separation costs, per share

$ 0.22

Business separation additional income tax expense

$ 51.8

Business separation additional income tax expense, per share

$ 0.24

Income tax provision on repatriation of foreign earnings

$ 45.7

Foreign earnings repatriated

443.8

Loss on extinguishment of debt

6.9

[2]

$ 0

[2]

$ 0

[2]

$ 0

[2]

$ 16.6

[2]

$ 0

[2]

$ 0

[2]

$ 0

[2]

6.9

[2]

$ 16.6

[2]

$ 0

Versum Financing [Member]

Restructuring Cost and Reserve [Line Items]

Cash to be received at spinoff

550

550

Senior notes

$ 425

425

Extinguishment of debt amount

418.3

Loss on extinguishment of debt

6.9

Loss on extinguishment of debt, net of tax

$ 4.3

Loss on extinguishment of debt, per share, net of tax

$ 0.02

[1]

For additional information, see Note 3, Materials Technologies Separation.

[2]

For additional information, see Note 15, Debt.

Business Separation (Subsequent

Business Separation (Subsequent Event) (Narrative) (Details) - Subsequent Event [Member]	1 Months Ended
	Oct. 31, 2016
Subsequent Event [Line Items]
Date spin-off of Versum Completed	Oct. 1, 2016
Basis for spin stock issue	one share of Versum common stock for every two shares of Air Products’ common stock

Discontinued Operations (Narrat

Discontinued Operations (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred tax assets, valuation allowance		$ 155.2	$ 103.6
Unrecognized tax benefits		106.9	97.5	$ 108.7	$ 124.3
Energy-from-Waste [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal, before tax	$ 945.7	945.7
Loss on disposat, net of tax	846.6	846.6	0	0
Plant and equipment, estimated net realizable value	20	18.2	0
Deferred tax assets, valuation allowance	58
Unrecognized tax benefits	7.9
Energy-from-Waste [Member] | Asset Impariment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal, before tax	913.5	913.5
Energy-from-Waste [Member] | Contract Actions/Other [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal, before tax	$ 32.2	32.2
European Homecare Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of business, net of tax		0	0	$ 3.9
Assets of discontinued operations		0	0
Liabilities of discontinued operations		$ 0	$ 0

Discontinued Operations (Carryi

Discontinued Operations (Carrying Amount of Accrual) (Details) - Energy From Waste [Member] - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal, before tax	$ 945.7	$ 945.7
Noncash expenses		(913.5)
Cash expenditures		(18.6)
Currency translation adjustment		(1.4)
Accrual for actions to dispose of business		12.2
Asset Impariment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal, before tax	913.5	913.5
Noncash expenses		(913.5)
Cash expenditures		0
Currency translation adjustment		0
Accrual for actions to dispose of business		0
Contract Actions/Other [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal, before tax	$ 32.2	32.2
Noncash expenses		0
Cash expenditures		(18.6)
Currency translation adjustment		(1.4)
Accrual for actions to dispose of business		$ 12.2

Discontinued Operations (Schedu

Discontinued Operations (Schedule of Operating Results) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from Discontinued Operations, net of tax		$ (884.2)	$ (6.8)	$ (2.9)
Energy From Waste [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales		0	0	0
Income (loss) before taxes		(41)	(9.2)	(10.9)
Income tax provision		3.4	2.4	3.4
Income (loss) from operations of discontinued operations		(37.6)	(6.8)	(7.5)
Loss on disposat, net of tax	$ 846.6	846.6	0	0
Income (loss) from Discontinued Operations, net of tax		(884.2)	(6.8)	(7.5)
European Homecare Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales		0	0	8.5
Income (loss) before taxes		0	0	0.7
Income tax provision		0	0	0
Income (loss) from operations of discontinued operations		0	0	0.7
Gain on sale of business, net of tax		0	0	3.9
Income (loss) from Discontinued Operations, net of tax		$ 0	$ 0	$ 4.6

Discontinued Operations (Sche67

Discontinued Operations (Schedule of Assets and Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total Current Assets	$ 19.4		$ 1.8
Total Noncurrent Assets	0		891.8
Total Current Liabilities	19		17
Total Noncurrent Liabilities	0		2.5
Energy From Waste [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Plant and equipment	18.2	$ 20	0
Other current assets	1.2		1.8
Total Current Assets	19.4		1.8
Plant and equipment, net	0		891.8
Total Noncurrent Assets	0		891.8
Payables and accrued liabilities	19		17
Total Current Liabilities	19		17
Other noncurrent liabilities	0		2.5
Total Noncurrent Liabilities	$ 0		$ 2.5

Business Restructuring and Co68

Business Restructuring and Cost Reduction Actions (Narrative) (Details) $ / shares in Units, $ in Millions

3 Months Ended

12 Months Ended

Sep. 30, 2016USD ($)

[1]

Jun. 30, 2016USD ($)

[1]

Mar. 31, 2016USD ($)

[1]

Dec. 31, 2015USD ($)

[1]

Sep. 30, 2015USD ($)

[1]

Jun. 30, 2015USD ($)

[1]

Mar. 31, 2015USD ($)

[1]

Dec. 31, 2014USD ($)

[1]

Sep. 30, 2014USD ($)Employees$ / shares

Sep. 30, 2016USD ($)Employees$ / shares

Sep. 30, 2015USD ($)Employees$ / shares

Sep. 30, 2014USD ($)

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

$ 11.1

$ 14.2

$ 8.6

$ 0

$ 61.7

$ 58.2

$ 55.4

$ 32.4

$ 33.9

[1]

$ 207.7

[1]

$ 12.7

Cost Reduction Actions 2016 [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

33.9

Business restructuring and cost reduction actions, after-tax

$ 24

Business restructuring and cost reduction actions, per share | $ / shares

$ 0.11

Number of positions eliminated | Employees

700

Cost Reduction Actions 2016 [Member] | Severance And Other Benefits [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

$ 33.9

Business Realignment and Reorganization 2015 [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

$ 12.7

207.7

12.7

Business restructuring and cost reduction actions, after-tax

$ 8.2

$ 153.2

Business restructuring and cost reduction actions, per share | $ / shares

$ 0.04

$ 0.71

Number of positions eliminated | Employees

50

2,000

Business Realignment and Reorganization 2015 [Member] | Industrial Gases Americas [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

$ 31.7

2.9

Business Realignment and Reorganization 2015 [Member] | Industrial Gases EMEA [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

52.2

3.1

Business Realignment and Reorganization 2015 [Member] | Industrial Gases Asia [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

10.3

1.5

Business Realignment and Reorganization 2015 [Member] | Industrial Gases Global [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

37

1.5

Business Realignment and Reorganization 2015 [Member] | Materials Technologies [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

27.6

1.6

Business Realignment and Reorganization 2015 [Member] | Corporate and Other [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

48.9

2.1

Business Realignment and Reorganization 2015 [Member] | Asset Actions [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

55.8

0

Business Realignment and Reorganization 2015 [Member] | Severance And Other Benefits [Member]

Restructuring and Related Cost [Line Items]

Business restructuring and cost reduction actions

$ 151.9

$ 12.7

[1]

For additional information, see Note 5, Business Restructuring and Cost Reduction Actions.

Business Restructuring and Co69

Business Restructuring and Cost Reduction Actions (Carrying Amount of Accrual) (Details) - USD ($) $ in Millions	3 Months Ended																	12 Months Ended
	Sep. 30, 2016		Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015		Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014	[1]	Sep. 30, 2014	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions	$ 11.1	[1]	$ 14.2		$ 8.6		$ 0		$ 61.7	[1]	$ 58.2		$ 55.4		$ 32.4			$ 33.9	[1]	$ 207.7	[1]	$ 12.7
Cost Reduction Actions 2016 [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions																		33.9
Cost Reduction Actions 2016 [Member] | Severance And Other Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions																		33.9
Amount reflected in pension liability																		(0.9)
Cash expenditures																		(20.4)
Currency translation adjustment																		0.3
Accrued Balance	12.9																	12.9
Business Realignment and Reorganization 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions																	$ 12.7			207.7		12.7
Amount reflected in pension liability																				(14)
Noncash expenses																				(47.4)
Cash expenditures																		(37.9)		(114.7)		(2.2)
Currency translation adjustment																		(0.4)		(0.4)
Accrued Balance	3.4								41.7								10.5	3.4		41.7		10.5
Business Realignment and Reorganization 2015 [Member] | Severance And Other Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions																				151.9		12.7
Amount reflected in pension liability																				(14)
Noncash expenses																				0
Cash expenditures																		(34.1)		(113.5)		(2.2)
Currency translation adjustment																		(0.4)		(0.4)
Accrued Balance	0								34.5								10.5	0		34.5		10.5
Business Realignment and Reorganization 2015 [Member] | Asset Actions [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions																				55.8		0
Amount reflected in pension liability																				0
Noncash expenses																				(47.4)
Cash expenditures																		(3.8)		(1.2)		0
Currency translation adjustment																		0		0
Accrued Balance	$ 3.4								$ 7.2								$ 0	$ 3.4		$ 7.2		$ 0
[1]	For additional information, see Note 5, Business Restructuring and Cost Reduction Actions.

Business Combinations (Narrativ

Business Combinations (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Acquisitions, less cash acquired									$ 0	$ 34.5	$ 0
Gain on previously held equity interest	$ 0		$ 0		$ 0		$ 17.9	[1]	$ 0	17.9	$ 0
Production Joint Venture [Member]
Business Acquisition [Line Items]
Acquisitions, less cash acquired							$ 22.6
Percent ownership before acquisition							50.00%
Percent ownership after acquisition							100.00%
Gain on previously held equity interest										17.9
Gain on previously held equity interest, after tax										$ 11.2
Gain on previously held equity interest, per share										$ 0.05
[1]	For additional information, see Note 6, Business Combination.

Inventories (Narratives) (Detai

Inventories (Narratives) (Details)	Sep. 30, 2016	Sep. 30, 2015
Inventory Disclosure [Abstract]
Percentage of LIFO Inventory	34.90%	35.80%

Inventories (Schedule of Invent

Inventories (Schedule of Inventory) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Inventories [Abstract]
Finished goods	$ 456.7	$ 494.9
Work in process	38.2	34.4
Raw materials, supplies and other	204	229.3
Total FIFO value	698.9	758.6
Less: Excess of FIFO cost over LIFO cost	(79)	(100.8)
Inventories	$ 619.9	$ 657.8

Summarized Financial Informat73

Summarized Financial Information of Equity Affiliates (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Schedule of Equity Method Investment [Line Items]
Other income (expense), net		$ 58.1	$ 47.3	$ 52.8
Obligation for future contribution to equity affiliate		94.4	67.5
Investment in foreign affiliates		1,286	1,262.8
Goodwill associated with affiliate companies accounted for by equity method.		109.5	112
Dividends received from equity affiliates		$ 96.8	$ 51.9	$ 75.4
Abdullah Hashim Industrial Gas & Equipment Co. Ltd [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		25.00%
Air Products South Africa (Proprietary) Limited [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		50.00%
Bangkok Cogeneration Company Limited [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		49.00%
Bangkok Industrial Gases Co., Ltd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		49.00%
Chengdu Air & Gas Products Ltd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		50.00%
Daido Air Products Electronics, Inc. [Member]
Schedule of Equity Method Investment [Line Items]
Equity method investment, sale proceeds	$ 15.9
Equity method investment, gain on sale	0.7
Equity method investment, carrying value at time of sale	12.8
Daido Air Products Electronics, Inc. [Member] | Equity Method Investments Member | Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Currency Translation [Member}
Schedule of Equity Method Investment [Line Items]
Other income (expense), net	$ (2.4)
Helap Sa [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		50.00%
High-Tech Gases (Beijing) Co., Ltd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		50.00%
INFRA Group [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		40.00%
INOX Air Products Limited [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		50.00%
Jazan Gas Projects Company [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		25.00%
Obligation for future contribution to equity affiliate		$ 94.4
Noncash transaction, increase to investment		26.9
Total expected investment		100
Future payments to acquire equity method investments		$ 100
Kulim Industrial Gases Sdn. Bhd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		50.00%
Sapio Produzione Idrogeno Ossigeno Srl [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		49.00%
Tecnologia En Nitrogeno S De Rl De Cv [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		50.00%
Tyczka Industrie-Gases GmbH [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		50.00%
WuXi Hi-Tech Gas Co., Ltd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage		50.00%

Summarized Financial Informat74

Summarized Financial Information of Equity Affiliates (Investment Listing) (Details)	Sep. 30, 2016
Abdullah Hashim Industrial Gas & Equipment Co. Ltd [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	25.00%
Air Products South Africa (Proprietary) Limited [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	50.00%
Bangkok Cogeneration Company Limited [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	49.00%
Bangkok Industrial Gases Co., Ltd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	49.00%
Chengdu Air & Gas Products Ltd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	50.00%
Helap S.A. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	50.00%
High-Tech Gases (Beijing) Co., Ltd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	50.00%
INFRA Group [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	40.00%
INOX Air Products Limited [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	50.00%
Jazan Gas Projects Company [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	25.00%
Kulim Industrial Gases Sdn. Bhd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	50.00%
Sapio Produzione Idrogeno Ossigeno S.r.l. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	49.00%
Tecnologia en Nitrogeno S. de R.L. de C.V. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	50.00%
Tyczka Industrie-Gases GmbH [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	50.00%
WuXi Hi-Tech Gas Co., Ltd. [Member]
Schedule of Equity Method Investment [Line Items]
Ownership interest percentage	50.00%

Summarized Financial Informat75

Summarized Financial Information of Equity Affiliates (Table Of Summarized Financial Information Of Equity Affiliates) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Current assets	$ 1,449.8	$ 1,296.4
Noncurrent assets	3,063.9	2,607.4
Current liabilities	699.2	654
Noncurrent liabilities	1,540.6	988
Net sales	2,308.5	2,604.3	$ 2,808.7
Sales less cost of sales	882.6	949.2	984.7
Operating income	487.8	524	542.9
Net income	$ 338	$ 351	$ 359.5

Plant and Equipment, net (Narra

Plant and Equipment, net (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Property, Plant and Equipment [Line Items]
Depreciation	$ 893	$ 900.4	$ 914.8

Plant and Equipment, net (Major

Plant and Equipment, net (Major Classes of Plant and Equipment) (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Property, Plant and Equipment [Line Items]
Plant and Equipment, at cost		$ 20,190.1	$ 19,462.8
Less: accumulated depreciation		11,337.4	10,717.7
Plant and equipment, net	[1]	8,852.7	8,745.1	$ 8,941.6
Land [Member]
Property, Plant and Equipment [Line Items]
Plant and Equipment, at cost		232.9	226.2
Building [Member]
Property, Plant and Equipment [Line Items]
Plant and Equipment, at cost		$ 1,119.8	1,080.2
Average useful life		30 years
Production Facility [Member]
Property, Plant and Equipment [Line Items]
Plant and Equipment, at cost		$ 13,267.3	12,819.5
Production Facility [Member] | Industrial Gases - Regional [Member]
Property, Plant and Equipment [Line Items]
Plant and Equipment, at cost	[2]	$ 12,372.1	11,873.8
Production Facility [Member] | Industrial Gases - Regional [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		10 years
Production Facility [Member] | Industrial Gases - Regional [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		20 years
Production Facility [Member] | Materials Technologies [Member]
Property, Plant and Equipment [Line Items]
Plant and Equipment, at cost		$ 859.2	902.7
Production Facility [Member] | Materials Technologies [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		10 years
Production Facility [Member] | Materials Technologies [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		15 years
Production Facility [Member] | Other [Member]
Property, Plant and Equipment [Line Items]
Plant and Equipment, at cost		$ 36	43
Production Facility [Member] | Other [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		5 years
Production Facility [Member] | Other [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		20 years
Distribution and Other Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Plant and Equipment, at cost	[3]	$ 4,042.1	3,963.1
Distribution and Other Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		5 years
Distribution and Other Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		25 years
Distribution equipment | Cylinders [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		10 years
Distribution equipment | Cylinders [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		25 years
Distribution equipment | Tanks [Member]
Property, Plant and Equipment [Line Items]
Average useful life		20 years
Distribution equipment | Customer Stations [Member]
Property, Plant and Equipment [Line Items]
Average useful life		7 years 6 months
Distribution equipment | Tractors and Trailers [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		5 years
Distribution equipment | Tractors and Trailers [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Average useful life		15 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Plant and Equipment, at cost		$ 1,528	$ 1,373.8
[1]	Long-lived assets include plant and equipment, net.
[2]	Depreciable lives of production facilities related to long-term customer supply contracts are matched to the contract lives.
[3]	The depreciable lives for various types of distribution equipment are 10 to 25 years for cylinders, depending on the nature and properties of the product; 20 years for tanks; 7.5 years for customer stations; and 5 to 15 years for tractors and trailers.

Goodwill (Schedule of Goodwill

Goodwill (Schedule of Goodwill by Segment) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2016	Sep. 30, 2015
Goodwill [Roll Forward]
Goodwill, net, Beginning Balance		$ 1,131.3	$ 1,237.3
Goodwill, Acquisitions and Adjustments		0	5.4
Goodwill, Impairment Loss	$ (305.2)
Goodwill, Currency Translation and Other		18.9	(111.4)
Goodwill, net, Ending Balance	1,237.3	1,150.2	1,131.3
Industrial Gases - Americas [Member]
Goodwill [Roll Forward]
Goodwill, net, Beginning Balance		297.6	327.2
Goodwill, Acquisitions and Adjustments		0	2.2
Goodwill, Currency Translation and Other		11.5	(31.8)
Goodwill, net, Ending Balance	327.2	309.1	297.6
Industrial Gases - EMEA [Member]
Goodwill [Roll Forward]
Goodwill, net, Beginning Balance		386.5	433.3
Goodwill, Acquisitions and Adjustments		0	3.2
Goodwill, Currency Translation and Other		(5.9)	(50)
Goodwill, net, Ending Balance	433.3	380.6	386.5
Industrial Gases - Asia [Member]
Goodwill [Roll Forward]
Goodwill, net, Beginning Balance		133.1	140
Goodwill, Acquisitions and Adjustments		0	0
Goodwill, Currency Translation and Other		2.1	(6.9)
Goodwill, net, Ending Balance	140	135.2	133.1
Industrial Gases - Global [Member]
Goodwill [Roll Forward]
Goodwill, net, Beginning Balance		19.9	21.4
Goodwill, Acquisitions and Adjustments		0	0
Goodwill, Currency Translation and Other		0.3	(1.5)
Goodwill, net, Ending Balance	21.4	20.2	19.9
Materials Technologies [Member]
Goodwill [Roll Forward]
Goodwill, net, Beginning Balance		294.2	315.4
Goodwill, Acquisitions and Adjustments		0	0
Goodwill, Currency Translation and Other		10.9	(21.2)
Goodwill, net, Ending Balance	$ 315.4	$ 305.1	$ 294.2

Goodwill (Schedule of Accumulat

Goodwill (Schedule of Accumulated Impairment Losses)(Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Goodwill [Line Items]
Goodwill, gross		$ 1,408.8	$ 1,375	$ 1,522.1
Goodwill, Accumulated impairment losses	[1]	(258.6)	(243.7)	(284.8)
Goodwill, net		1,150.2	1,131.3	1,237.3
Industrial Gases Americas [Member]
Goodwill [Line Items]
Goodwill, net		309.1	297.6	327.2
Goodwill, Accumulated impairment losses currency translation		$ 46.6	$ 61.5	$ 20.4
[1]	Amount is attributable to the Industrial Gases – Americas segment and includes currency translation of $46.6, $61.5, and $20.4 as of 30 September 2016, 2015, and 2014, respectively.

Goodwill (Narrative) (Details)

Goodwill (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended
		Sep. 30, 2014	Sep. 30, 2016	Sep. 30, 2015
Goodwill [Line Items]
Goodwill, net		$ 1,237.3	$ 1,150.2	$ 1,131.3
Goodwill impairment charge		305.2
Goodwill accumulated impairment losses	[1]	$ 284.8	$ 258.6	$ 243.7
[1]	Amount is attributable to the Industrial Gases – Americas segment and includes currency translation of $46.6, $61.5, and $20.4 as of 30 September 2016, 2015, and 2014, respectively.

Intangible Assets (Narratives)

Intangible Assets (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets		$ 32.9	$ 36	$ 42.1
Industrial Gases Americas [Member]
Acquired Indefinite-Lived Intangible Assets [Line Items]
Intangible asset impairment charge	$ 4.9

Intangible Assets (Acquired Int

Intangible Assets (Acquired Intangible Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Intangible Assets (Excluding Goodwill) [Abstract]
Intangible assets, gross	$ 741.9	$ 729.5
Intangible assets, accumulated amortization and impairment	(253.9)	(221.2)
Intangible assets, net	488	508.3
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	675.7	666.1
Accumulated amortization	(250.4)	(217.9)
Finite-lived intangible assets, net	425.3	448.2
Trade names and trademarks [Member]
Acquired Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross	66.2	63.4
Accumulated impairment	(3.5)	(3.3)
Indefinite-lived intangible assets, net	62.7	60.1
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	517.4	507.4
Accumulated amortization	(155.2)	(129.6)
Finite-lived intangible assets, net	362.2	377.8
Patents and Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	76.6	76.9
Accumulated amortization	(57.9)	(53.3)
Finite-lived intangible assets, net	18.7	23.6
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	81.7	81.8
Accumulated amortization	(37.3)	(35)
Finite-lived intangible assets, net	$ 44.4	$ 46.8

Intangible Assets (Projected An

Intangible Assets (Projected Annual Amortization Expense for Intangible Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,017	$ 31.2
2,018	29.5
2,019	27.9
2,020	27.5
2,021	26.1
Thereafter	283.1
Total future amortization expense	$ 425.3	$ 448.2

Leases (Narratives) (Details)

Leases (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Leases [Abstract]
Capital leases, plant and equipment	$ 22.7	$ 12.8
Capital leases, accumulated depreciation	4.8	4.3
Operating leases, rent expense	80.8	88.2	$ 97.9
Future capital lease payment present value	10.2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lessor, lease payments collected	186	148.1	134.4
Receivable Balance Reduction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lessor, lease payments collected	$ 85.5	$ 69.3	$ 72.7

Leases (Narrative) (Discontinue

Leases (Narrative) (Discontinued Operations) (Details) - Energy From Waste [Member] $ in Millions	Sep. 30, 2016USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, operating leases, future minimum payments due in each of next five years	$ 2
Discontinued operations, operating leases, future minimum payments due thereafter	40
Discontinued operations, operating leases, future minimum payments due total	$ 50

Leases (Minimum Payments Due) (

Leases (Minimum Payments Due) (Details) $ in Millions	Sep. 30, 2016USD ($)
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2,017	$ 2
2,018	1.8
2,019	1.6
2,020	1.6
2,021	2.7
Thereafter	21.3
Total	31
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2,017	70.5
2,018	62.5
2,019	49.9
2,020	38.4
2,021	31.6
Thereafter	102.2
Total	$ 355.1

Leases (Lease Receivables) (Det

Leases (Lease Receivables) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Leases [Abstract]
Gross minimum lease payments receivable	$ 2,072.6	$ 2,322.5
Unearned interest income	(762.7)	(888.1)
Lease Receivables, net	$ 1,309.9	$ 1,434.4

Leases (Minimum Lease Payments

Leases (Minimum Lease Payments Receivable) (Details) $ in Millions	Sep. 30, 2016USD ($)
Capital Leases, Future Minimum Payments Receivable, Fiscal Year Maturity [Abstract]
2,017	$ 182.7
2,018	181.4
2,019	175.9
2,020	171.1
2,021	165.1
Thereafter	1,196.4
Total	$ 2,072.6

Financial Instruments (Narrativ

Financial Instruments (Narrative) (Details) € in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2016EUR (€)	Sep. 30, 2016USD ($)	Sep. 30, 2015EUR (€)	Sep. 30, 2015USD ($)
Derivative [Line Items]
Net liability position of derivatives with credit risk-related contingent features		$ 11.2		$ 0.2
Collateral amount that counterparties would be required to post		267.6		226.9
Foreign Currency Debt [Member] | Euro Denominated Member [Member]
Derivative [Line Items]
Notional Amount included in designated foreign currency denominated debt	€ 920.7	$ 1,034.4	€ 687.7	$ 768.4
Forward Exchange Contracts [Member]
Derivative [Line Items]
Maximum Remaining Maturity of Foreign Currency Derivatives	2 years 10 months	2 years 10 months
Interest rate management contract [Member]
Derivative [Line Items]
Maximum length of time of hedged exposures, years	0 years	0 years

Financial Instruments (Schedule

Financial Instruments (Schedule of Outstanding Currency Price Risk Management Instruments) (Details) - Forward Exchange Contracts [Member] - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Derivative [Line Items]
US$ Notional	$ 7,949	$ 5,898.4
Years Average Maturity	8 months	11 months
Cash Flow Hedges [Member]
Derivative [Line Items]
US$ Notional	$ 4,130.3	$ 4,543.8
Years Average Maturity	6 months	6 months
Net Investment Hedges [Member]
Derivative [Line Items]
US$ Notional	$ 968.2	$ 491.3
Years Average Maturity	2 years 8 months	4 years
Hedges Not Designated [Member]
Derivative [Line Items]
US$ Notional	$ 2,850.5	$ 863.3
Years Average Maturity	5 months	8 months

Financial Instruments (Schedu91

Financial Instruments (Schedule of Interest Rate Swaps and Cross Currency Interest Rate Swaps) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Interest Rate Swaps Contracts [Member] | Fair Value Hedges [Member]
Derivative [Line Items]
US$ Notional	$ 600	$ 600
Pay %	LIBOR	LIBOR
Average Receive %	2.28%	2.77%
Years Average Maturity	2 years 4 months	3 years 4 months
Interest Rate Swaps Contracts [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
US$ Notional	$ 0	$ 0
Pay %	0.00%	0.00%
Average Receive %	0.00%	0.00%
Years Average Maturity	0 years	0 years
Cross Currency Interest Rate Swaps [Member] | Net Investment Hedges [Member]
Derivative [Line Items]
US$ Notional	$ 517.7	$ 609.9
Pay %	3.24%	4.06%
Average Receive %	2.43%	2.61%
Years Average Maturity	2 years 7 months	3 years 2 months
Cross Currency Interest Rate Swaps [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
US$ Notional	$ 1,088.9	$ 1,055.2
Pay %	4.77%	4.29%
Average Receive %	2.72%	2.63%
Years Average Maturity	3 years 4 months	3 years 11 months
Cross Currency Interest Rate Swaps [Member] | Hedges Not Designated [Member]
Derivative [Line Items]
US$ Notional	$ 27.4	$ 12.9
Pay %	3.62%	3.12%
Average Receive %	0.81%	3.08%
Years Average Maturity	1 year 10 months	4 years 1 month

Financial Instruments (Fair Val

Financial Instruments (Fair Value of Derivative Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Derivative [Line Items]
Total Derivatives, Assets	$ 375.3	$ 318.9
Total Derivatives, Liabilities	95.8	125.2
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Total Derivatives, Assets	296.6	291.6
Total Derivatives, Liabilities	65.1	120.7
Designated as Hedging Instrument [Member] | Other Receivables [Member] | Interest rate management contract [Member]
Derivative [Line Items]
Total Derivatives, Assets	19.9	17.6
Designated as Hedging Instrument [Member] | Other Receivables [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Assets	72.3	52.1
Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member] | Interest rate management contract [Member]
Derivative [Line Items]
Total Derivatives, Assets	160	153.4
Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Assets	44.4	68.5
Designated as Hedging Instrument [Member] | Accrued Liabilities [Member] | Interest rate management contract [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	0	0
Designated as Hedging Instrument [Member] | Accrued Liabilities [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	44	110.7
Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member] | Interest rate management contract [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	12	0.8
Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	9.1	9.2
Hedges Not Designated [Member]
Derivative [Line Items]
Total Derivatives, Assets	78.7	27.3
Total Derivatives, Liabilities	30.7	4.5
Hedges Not Designated [Member] | Other Receivables [Member] | Interest rate management contract [Member]
Derivative [Line Items]
Total Derivatives, Assets	0	0
Hedges Not Designated [Member] | Other Receivables [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Assets	78.7	3.2
Hedges Not Designated [Member] | Other Noncurrent Assets [Member] | Interest rate management contract [Member]
Derivative [Line Items]
Total Derivatives, Assets	0	0.8
Hedges Not Designated [Member] | Other Noncurrent Assets [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Assets	0	23.3
Hedges Not Designated [Member] | Accrued Liabilities [Member] | Interest rate management contract [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	0	0
Hedges Not Designated [Member] | Accrued Liabilities [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	30	3.9
Hedges Not Designated [Member] | Other Noncurrent Liabilities [Member] | Interest rate management contract [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	0.7	0
Hedges Not Designated [Member] | Other Noncurrent Liabilities [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	$ 0	$ 0.6

Financial Instruments (Schedu93

Financial Instruments (Schedule of Gain/Loss Related to Derivative Instruments) (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
Interest expense		$ 115.5	$ 103.5	$ 125.1
Other (income) expense, net		(58.1)	(47.3)	(52.8)
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Derivative [Line Items]
Interest expense		10	3.3	(1.1)
Other (income) expense, net		(46.2)	16.9	$ (8.7)
Cash Flow Hedges [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI (effective portion)		13.7	(35)
Net (gain) loss reclassified from OCI to sales/cost of sales (effective portion)		0.2	0.6
Net (gain) loss reclassified from OCI to other income (expense), net (effective portion)		(46)	15.4
Net (gain) loss reclassified from OCI to interest expense (effective portion)		10	3.3
Net (gain) loss reclassified from OCI to other income (expense), net (ineffective portion)		(0.2)	1.5
Cash Flow Hedges [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI (effective portion)		10.5	(44.9)
Net (gain) loss reclassified from OCI to sales/cost of sales (effective portion)		0.2	0.6
Net (gain) loss reclassified from OCI to other income (expense), net (effective portion)		(25.7)	35.6
Net (gain) loss reclassified from OCI to interest expense (effective portion)		6.7	0.7
Net (gain) loss reclassified from OCI to other income (expense), net (ineffective portion)		(0.2)	1.5
Cash Flow Hedges [Member] | Other Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI (effective portion)	[1]	3.2	9.9
Net (gain) loss reclassified from OCI to sales/cost of sales (effective portion)	[1]	0	0
Net (gain) loss reclassified from OCI to other income (expense), net (effective portion)	[1]	(20.3)	(20.2)
Net (gain) loss reclassified from OCI to interest expense (effective portion)	[1]	3.3	2.6
Net (gain) loss reclassified from OCI to other income (expense), net (ineffective portion)	[1]	0	0
Fair Value Hedges [Member]
Derivative [Line Items]
Net (gain) loss recognized in interest expense	[2]	(8.8)	9.9
Fair Value Hedges [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Net (gain) loss recognized in interest expense	[2]	0	0
Fair Value Hedges [Member] | Other Contracts [Member]
Derivative [Line Items]
Net (gain) loss recognized in interest expense	[1],[2]	(8.8)	9.9
Net Investment Hedges [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI		42.8	201
Net Investment Hedges [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI		17.4	60.1
Net Investment Hedges [Member] | Foreign Currency Debt [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI		(9.6)	91.4
Net Investment Hedges [Member] | Other Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI	[1]	35	49.5
Hedges Not Designated [Member]
Derivative [Line Items]
Net gain (loss) recognized in net income (loss)	[3]	(2.4)	(6.7)
Hedges Not Designated [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in net income (loss)	[3]	(0.8)	(7.3)
Hedges Not Designated [Member] | Other Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in net income (loss)	[1],[3]	$ (1.6)	$ 0.6
[1]	Other includes the impact on other comprehensive income (OCI) and earnings primarily related to interest rate swaps and cross currency interest rate swaps.
[2]	The impact of fair value hedges noted above was largely offset by recognized gains and losses resulting from the impact of changes in related interest rates on outstanding debt.
[3]	The impact of the non-designated hedges noted above was largely offset by recognized gains and losses resulting from the impact of changes in exchange rates on assets and liabilities denominated in nonfunctional currencies.

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) $ in Millions	3 Months Ended
	Sep. 30, 2014USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Goodwill impairment charge	$ 305.2

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of the Carrying Values and Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion carrying value	$ 5,289.4	$ 4,384.7
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion carrying value	5,289.4	4,384.7
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion fair value	5,467.2	4,645.7
Interest rate management contract [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	179.9	171.8
Derivative liabilities	12.7	0.8
Interest rate management contract [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	179.9	171.8
Derivative liabilities	12.7	0.8
Forward Exchange Contracts [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	195.4	147.1
Derivative liabilities	83.1	124.4
Forward Exchange Contracts [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	195.4	147.1
Derivative liabilities	$ 83.1	$ 124.4

Fair Value Measurements (Sche96

Fair Value Measurements (Schedule of Fair Value of Assets and Liabilities) (Details) - Fair Value [Member] - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Assets at Fair Value	$ 375.3	$ 318.9
Total Liabilities at Fair Value	95.8	125.2
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Assets at Fair Value	375.3	318.9
Total Liabilities at Fair Value	95.8	125.2
Interest rate management contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	179.9	171.8
Derivative liabilities	12.7	0.8
Interest rate management contract [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	179.9	171.8
Derivative liabilities	12.7	0.8
Forward Exchange Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	195.4	147.1
Derivative liabilities	83.1	124.4
Forward Exchange Contracts [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	195.4	147.1
Derivative liabilities	$ 83.1	$ 124.4

Fair Value Measurements (Sche97

Fair Value Measurements (Schedule of Non-recurring Fair Value Measurements Of Long-Lived Assets Held For Sale) (Details) - Energy From Waste [Member] - Asset Actions [Member] - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016
Discontinued Operation Long Lived Asset [Member]
Long Lived Assets Held-for-sale [Line Items]
Long-lived assets held for sale, Fair Value		$ 20
Long-lived assets held for sale, Total Loss	$ 20
Level 1 [Member] | Discontinued Operation Long Lived Asset [Member]
Long Lived Assets Held-for-sale [Line Items]
Long-lived assets held for sale, Fair Value		0
Level 2 [Member]
Long Lived Assets Held-for-sale [Line Items]
Long-lived assets held for sale, Fair Value		0
Level 3 [Member] | Discontinued Operation Long Lived Asset [Member]
Long Lived Assets Held-for-sale [Line Items]
Long-lived assets held for sale, Fair Value		$ 20

Debt (Narratives) (Details)

Debt (Narratives) (Details) $ / shares in Units, € in Millions, $ in Millions

1 Months Ended

3 Months Ended

7 Months Ended

12 Months Ended

Sep. 30, 2015CLF

Sep. 30, 2015USD ($)$ / shares

Sep. 30, 2016USD ($)

[1]

Jun. 30, 2016USD ($)

[1]

Mar. 31, 2016USD ($)

[1]

Dec. 31, 2015USD ($)

[1]

Sep. 30, 2015USD ($)

Jun. 30, 2015USD ($)

[1]

Mar. 31, 2015USD ($)

[1]

Dec. 31, 2014USD ($)

[1]

Apr. 30, 2013

Sep. 30, 2016USD ($)

Sep. 30, 2015USD ($)

Sep. 30, 2014USD ($)

Sep. 30, 2016EUR (€)

Sep. 30, 2016USD ($)

Debt Instruments [Abstract]

Short-term debt, weighted average interest rate

0.80%

0.80%

0.80%

1.10%

1.10%

Cash paid for interest, net of amounts capitalized

$ 121.1

$ 97.5

$ 132.4

Debt Instrument [Line Items]

Payments on long-term debt

485

708.7

608.6

Loss on extinguishment of debt

$ 6.9

$ 0

$ 0

$ 0

$ 16.6

[1]

$ 0

$ 0

$ 0

$ 6.9

[1]

16.6

[1]

$ 0

Eurobonds .375%

Debt Instrument [Line Items]

Debt instrument, issuance date

Jun. 1, 2016

Debt instrument, maturity date

Jun. 1, 2021

Debt Payable In Other Currencies

$ 0

0

0

$ 393.2

Interest rate of debt, stated percentage

0.375%

0.375%

Debt instrument, maturity year

2,021

Debt instrument, principal amount

€ 350

$ 386.9

Note 2.0%

Debt Instrument [Line Items]

Debt instrument, maturity date

Aug. 2, 2016

Senior Notes

$ 350

$ 350

$ 350

$ 0

Interest rate of debt, stated percentage

2.00%

2.00%

Debt instrument, maturity year

2,016

Payments on long-term debt

$ 350

CLP Series E bonds 6.3%

Debt Instrument [Line Items]

Debt instrument, maturity date

Jan. 22, 2030

Jan. 22, 2030

Payments on long-term debt

$ 146.6

Loss on extinguishment of debt

16.6

Loss on extinguishment of debt, net of tax

$ 14.2

Loss on extinguishment of debt, per share, net of tax | $ / shares

$ 0.07

Extinguishment of debt amount

CLF 3,000,000

$ 130

Revolving Credit Facility [Member] | Credit Agreement 2013 Member [Member]

Debt Instrument [Line Items]

Credit facility, initiation date

Apr. 30, 2013

Credit facility, length credit agreement in years

5 years

Credit facility, maximum borrowing capacity

$ 2,690

Credit facility, expiration date

Apr. 30, 2018

Credit facility, amount borrowed and outstanding

$ 0

Revolving Credit Facility [Member] | Credit Agreement 2013 Member [Member] | Maximum [Member]

Debt Instrument [Line Items]

Covenant, ratio of total debt to total capitalization

70.00%

70.00%

Foreign Subsidiary Facility [Member]

Debt Instrument [Line Items]

Credit facility, maximum borrowing capacity

$ 51.3

Credit facility, amount borrowed and outstanding

$ 51.3

[1]

For additional information, see Note 15, Debt.

Debt (Business Separation Finan

Debt (Business Separation Financing) (Narrative) (Details) - Versum Financing [Member] - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Debt Instrument [Line Items]
Senior Notes	$ 425
Senior Note 5.5%
Debt Instrument [Line Items]
Senior Notes	$ 425	$ 0
Interest rate of debt, stated percentage	5.50%
Debt instrument, maturity date	Sep. 30, 2024
Term Loan B 3.346%
Debt Instrument [Line Items]
Term Loan	$ 575	$ 0
Interest rate of debt, stated percentage	3.346%
Debt instrument, maturity date	Sep. 30, 2023
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 200
Credit facility, amount borrowed and outstanding	$ 0
Line of credit facility, expiration date	Sep. 30, 2021
Net leverage ratio covenant (total debt net of cash on hand to total adjusted EBITDA)	325.00%
Revolving Credit Facility [Member] | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Revolving Credit Facility [Member] | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Term Facility [Member]
Debt Instrument [Line Items]
Term facility, percent original principal annual amortization	1.00%
Term Facility [Member] | LIBOR
Debt Instrument [Line Items]
Interest rate, stated percentage, range minimum	0.75%
Basis spread on variable rate	2.50%
Term Facility [Member] | Base Rate
Debt Instrument [Line Items]
Interest rate, stated percentage, range minimum	1.75%
Basis spread on variable rate	1.50%

Debt (Summary of Outstanding De

Debt (Summary of Outstanding Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Debt Instruments [Abstract]
Short-term borrowings	$ 935.8	$ 1,494.3
Current portion of long-term debt	371.3	435.6
Long-term debt	4,918.1	3,949.1
Total Debt	$ 6,225.2	$ 5,879

Debt (Short-term Borrowings) (D

Debt (Short-term Borrowings) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Short-term Debt [Abstract]
Bank obligations	$ 133.1	$ 234.3
Commercial paper	802.7	1,260
Total Short-term Borrowings	$ 935.8	$ 1,494.3

Debt (Long-term Debt) (Details)

Debt (Long-term Debt) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Debt Instrument [Line Items]
Capital Lease Obligations	$ 10.2
Less: Unamortized discount	(9.2)	$ (6.3)
Total Long-term Debt	5,289.4	4,384.7
Less: Current portion of long-term debt	(371.3)	(435.6)
Long-term debt	4,918.1	3,949.1
Versum Financing [Member]
Debt Instrument [Line Items]
Senior Notes	$ 425
United States 5.0%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	5.00%
Debt Instruments Maturity Year	2,018
Capital Lease Obligations	$ 0.5	0.7
Foreign 11.3%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	11.30%
Debt Instrument, Maturity Year Range, Start	2,017
Debt Instrument, Maturity Year Range, End	2,036
Capital Lease Obligations	$ 9.7	1.1
Debentures 8.75%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	8.75%
Debt Instruments Maturity Year	2,021
Senior Notes	$ 18.4	18.4
Series D 7.3%
Debt Instrument [Line Items]
Weighted average interest rate	7.30%
Debt Instruments Maturity Year	2,016
Medium-term Notes	$ 0	32.1
Series E 7.6%
Debt Instrument [Line Items]
Weighted average interest rate	7.60%
Debt Instruments Maturity Year	2,026
Medium-term Notes	$ 17.2	17.2
Note 2.0%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	2.00%
Debt Instruments Maturity Year	2,016
Senior Notes	$ 0	350
Note 1.2%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	1.20%
Debt Instruments Maturity Year	2,018
Senior Notes	$ 400	400
Note 4.375%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	4.375%
Debt Instruments Maturity Year	2,019
Senior Notes	$ 400	400
Note 3.0%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	3.00%
Debt Instruments Maturity Year	2,022
Senior Notes	$ 400	400
Note 2.75%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	2.75%
Debt Instruments Maturity Year	2,023
Senior Notes	$ 400	400
Note 3.35%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	3.35%
Debt Instruments Maturity Year	2,024
Senior Notes	$ 400	400
Senior Note 5.5% | Versum Financing [Member]
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	5.50%
Debt Instruments Maturity Year	2,024
Senior Notes	$ 425	0
Term Loan B 3.346% | Versum Financing [Member]
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	3.346%
Debt Instruments Maturity Year	2,023
Term Loan	$ 575	0
Variable-rate industrial revenue bonds .68%
Debt Instrument [Line Items]
Weighted average interest rate	0.68%
Debt Instrument, Maturity Year Range, Start	2,035
Debt Instrument, Maturity Year Range, End	2,050
Other Long-term Debt	$ 769.9	769.9
Other 1.3%
Debt Instrument [Line Items]
Weighted average interest rate	1.30%
Debt Instrument, Maturity Year Range, Start	2,018
Debt Instrument, Maturity Year Range, End	2,019
Other Long-term Debt	$ 25.7	35
Eurobonds 4.625%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	4.625%
Debt Instruments Maturity Year	2,017
Debt Payable In Other Currencies	$ 337	335.2
Eurobonds 2.0%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	2.00%
Debt Instruments Maturity Year	2,020
Debt Payable In Other Currencies	$ 337	335.2
Eurobonds 1.0%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	1.00%
Debt Instruments Maturity Year	2,025
Debt Payable In Other Currencies	$ 337	335.2
Eurobonds .375%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	0.375%
Debt Instruments Maturity Year	2,021
Debt Payable In Other Currencies	$ 393.2	0
Other 4.4%
Debt Instrument [Line Items]
Interest rate of debt, stated percentage	4.40%
Debt Instrument, Maturity Year Range, Start	2,016
Debt Instrument, Maturity Year Range, End	2,022
Debt Payable In Other Currencies	$ 53	$ 161

Debt (Maturities of Long-term D

Debt (Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Long-term Debt, Fiscal Year Maturity [Abstract]
2,017	$ 371.3
2,018	419.4
2,019	406.6
2,020	353.4
2,021	416.9
Thereafter	3,321.8
Total Long-term Debt	$ 5,289.4	$ 4,384.7

Retirement Benefits (Narrative)

Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Sep. 30, 2016		Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015		Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014	[1]	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Recognized settlement losses	$ (2.8)	[1]	$ (1)		$ (2.6)		$ 0		$ (7)	[1]	$ (1.6)		$ (12.6)		$ 0		$ (6.4)	[1]	$ (21.2)	[1]	$ (5.5)
Shares of Common Stock in ESOP	3,031,534																3,031,534
Defined Contribution Plan, Cost Recognized																	$ 43.2		44.2		$ 45.2
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions																	79.3
ABO for all defined benefit pension plans	$ 4,954.9								$ 4,444.8								4,954.9		4,444.8
Pension arrangements not funded because of jurisdictional practice, accumulated benefit obligation	108																108
Pension arrangements not funded because of jurisdictional practice, projected benefit obligation	$ 115.3																$ 115.3
Average remaining service period																	approximately 10 years
Pension Plans, Defined Benefit [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Total expected contributions for next fiscal year																	$ 65
Pension Plans, Defined Benefit [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Total expected contributions for next fiscal year																	85
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid																	$ 12.3		$ 9.3
Discount rate																	2.40%		2.60%		2.40%
Accumulated postretirement benefit obligation discount rate	1.90%								2.40%								1.90%		2.40%
Net actuarial loss	$ 18.7								$ 11.9								$ 18.7		$ 11.9
Actuarial loss estimated																	(2.3)
U.S. Lump Sum Cash Payment [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid																	$ 52.9
[1]	For additional information, see Note 16, Retirement Benefits.

Retirement Benefits (Schedule o

Retirement Benefits (Schedule of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014	[1]	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	$ 2.8		$ 1		$ 2.6		$ 0		$ 7		$ 1.6		$ 12.6		$ 0		$ 6.4	[1]	$ 21.2	[1]	$ 5.5
US [Member]
Retirement Benefits [Abstract]
Defined Benefit Plan Recognized Gain Loss Due to Curtailments																	0		(5.3)		0
Defined Benefit Plan Disclosure [Line Items]
Service cost																	36.5		42.2		42.6
Interest cost																	110.7		124.7		130.7
Expected return on plan assets																	(202)		(202)		(187.8)
Actuarial loss amortization																	85.3		78.9		78.3
Prior service cost amortization																	2.8		2.8		2.9
Settlement loss																	5.1		18.9		4.8
Curtailments																	0		5.3		0
Special termination benefits																	2		7.2		0.2
Other																	(0.3)		1		0
Net periodic benefit cost																	40.1		79		71.7
International [Member]
Retirement Benefits [Abstract]
Defined Benefit Plan Recognized Gain Loss Due to Curtailments																	1.1		0		0
Defined Benefit Plan Disclosure [Line Items]
Service cost																	24.3		31.3		36
Interest cost																	44.3		57.8		67.2
Expected return on plan assets																	(78.3)		(79.8)		(78.1)
Actuarial loss amortization																	35.6		41.4		36.1
Prior service cost amortization																	(0.2)		0		0.2
Settlement loss																	1.3		2.3		0.7
Curtailments																	(1.1)		0		0
Special termination benefits																	0		1.5		0.1
Other																	2.1		2.1		2
Net periodic benefit cost																	28		56.6		64.2
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost																	2.2		2.8		3.3
Interest cost																	2		2.2		2.3
Actuarial loss amortization																	0.7		0.8		1.7
Net periodic benefit cost																	$ 4.9		$ 5.8		$ 7.3
[1]	For additional information, see Note 16, Retirement Benefits.

Retirement Benefits (Assumption

Retirement Benefits (Assumption in calculating net periodic benefit Cost) (Details)		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
US [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	[1]	4.30%	4.30%	4.80%
Expected return on plan assets		8.00%	8.30%	8.30%
Rate of compensation increase		3.50%	3.50%	4.00%
US [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		8.30%
US [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		5.10%
US [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		6.90%
U.S. Service Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		4.50%
U.S. Interest Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		4.10%
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	[1]	3.30%	3.60%	4.30%
Expected return on plan assets		6.30%	6.10%	6.50%
Rate of compensation increase		3.50%	3.60%	3.70%
International Service Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		3.40%
International Interest Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		3.20%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		2.40%	2.60%	2.40%
United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		6.60%
Percentage of International Plan Assets		over 80%
United Kingdom [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		7.30%
United Kingdom [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		3.50%
[1]	Effective in 2016, the Company began to measure the service cost and interest cost components of pension expense by applying spot rates along the yield curve to the relevant projected cash flows, as we believe this provides a better measurement of these costs. The 2016 discount rates used to measure the service cost and interest cost of our U.S. pension plans were 4.5% and 4.1%, respectively. The rates used to measure the service cost and interest cost of our major International pension plans were 3.4% and 3.2%, respectively. The previous method would have used a single discount rate for both service and interest costs. The Company has accounted for this as a change in accounting estimate and, accordingly has accounted for it on a prospective basis. This change does not affect the measurement of the total benefit obligation.

Retirement Benefits (Assumpt107

Retirement Benefits (Assumption in calculating projected benefit obligation) (Details)	Sep. 30, 2016	Sep. 30, 2015
US [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.50%	4.40%
Rate of compensation increase	3.50%	3.50%
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.00%	3.40%
Rate of compensation increase	3.50%	3.50%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.90%	2.40%

Retirement Benefits (Change in

Retirement Benefits (Change in PBO) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
US [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	$ 3,139.9	$ 3,002.9
Service cost	36.5	42.2	$ 42.6
Interest cost	110.7	124.7	130.7
Amendments	1.2	1.2
Actuarial (gain) loss	380.2	130.4
Curtailments	(0.4)	5.3
Settlement (gain) loss	5.4	6.7
Special termination benefits	2	7.2
Participant contributions	0	0
Benefits paid	(197.4)	(181.8)
Other	(0.4)	1.1
Obligation at End of Year	3,477.7	3,139.9	3,002.9
International [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	1,647.9	1,735.7
Service cost	24.3	31.3	36
Interest cost	44.3	57.8	67.2
Amendments	0	(3.1)
Actuarial (gain) loss	376.4	30
Curtailments	(1.2)	(5.1)
Settlement (gain) loss	(3.4)	(8.6)
Special termination benefits	0	1.5
Participant contributions	1.6	2.1
Benefits paid	(46.6)	(50.3)
Currency translation/other	(193.7)	(143.4)
Obligation at End of Year	1,849.6	1,647.9	1,735.7
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	86.9	93.5
Service cost	2.2	2.8	3.3
Interest cost	2	2.2	2.3
Actuarial (gain) loss	7.5	(2.3)
Benefits paid	(12.3)	(9.3)
Obligation at End of Year	$ 86.3	$ 86.9	$ 93.5

Retirement Benefits (Change 109

Retirement Benefits (Change in Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
US [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	$ 2,613.6	$ 2,746.2
Actual return on plan assets	275.2	(14)
Company contributions	13.9	63.1
Participant contributions	0	0
Benefits paid	(197.4)	(181.8)
Settlements	0	0
Currency translation/other	0	0.1
Fair Value at End of Year	2,705.3	2,613.6
Funded Status at End of Year	(772.4)	(526.3)
International [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	1,302.8	1,368.4
Actual return on plan assets	273.2	25.9
Company contributions	65.4	74.4
Participant contributions	1.6	2.1
Benefits paid	(46.6)	(50.3)
Settlements	(3.4)	(8.6)
Currency translation/other	(181.9)	(109.1)
Fair Value at End of Year	1,411.1	1,302.8
Funded Status at End of Year	(438.5)	(345.1)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Benefits paid	$ (12.3)	$ (9.3)

Retirement Benefits (Amounts re

Retirement Benefits (Amounts recognized in balance sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Accrued liabilities	$ (35.5)	$ (26.1)
US [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0	4
Accrued liabilities	(24.1)	(15.7)
Noncurrent liabilities	(748.3)	(514.6)
Net Amount Recognized	(772.4)	(526.3)
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0	0.3
Accrued liabilities	0	0
Noncurrent liabilities	(438.5)	(345.4)
Net Amount Recognized	(438.5)	(345.1)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued liabilities	(11.4)	(10.4)
Noncurrent liabilities	$ (74.9)	$ (76.5)

Retirement Benefits (Changes re

Retirement Benefits (Changes recognized in other comprehensive income on pretax basis) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
US [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (gain) loss arising during the period	$ 311.8	$ 351.8
Amortization of net actuarial loss	(90.4)	(97.8)
Prior service cost (credit) arising during the period	1.2	1.2
Amortization of prior service cost	(2.8)	(2.8)
Total	219.8	252.4
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (gain) loss arising during the period	172.1	79.4
Amortization of net actuarial loss	(36.5)	(43.3)
Prior service cost (credit) arising during the period	(0.1)	(3.1)
Amortization of prior service cost	0.2	0
Total	135.7	33
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (gain) loss arising during the period	7.5	(2.3)
Amortization of net actuarial loss	(0.7)	(0.8)
Total	$ 6.8	$ (3.1)

Retirement Benefits (Changes112

Retirement Benefits (Changes recognized in accumulated other comprehensive income on pretax basis) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
US [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 1,273.6	$ 1,052.2
Prior service cost	8.5	10.1
Total	1,282.1	1,062.3
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	769.6	634
Prior service cost	(1.9)	(2)
Net transition liability	0.4	0.4
Total	768.1	632.4
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 18.7	$ 11.9

Retirement Benefits (Amount of

Retirement Benefits (Amount of accumulated other comprehensive income expected to be recognized in next fiscal year) (Details) $ in Millions	12 Months Ended
	Sep. 30, 2016USD ($)
US [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 103
Prior service cost	2.8
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	58.3
Prior service cost	(0.2)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 2.3

Retirement Benefits (Benefit li

Retirement Benefits (Benefit liability exceeds value of plan assets) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
US [Member]
Pension Plans with PBO in Excess of Plan Assets:
PBO	$ 3,477.7	$ 2,917.1
Fair value of Plan assets	2,705.3	2,386.7
Pension Plans with ABO in Excess of Plan Assets:
ABO	3,242.5	2,689.2
Fair value of plan assets	2,705.3	2,386.7
International [Member]
Pension Plans with PBO in Excess of Plan Assets:
PBO	1,849.6	1,644.5
Fair value of Plan assets	1,411.1	1,299.1
Pension Plans with ABO in Excess of Plan Assets:
ABO	1,673.6	1,498
Fair value of plan assets	$ 1,370.1	$ 1,263.2

Retirement Benefits (Plan Asset

Retirement Benefits (Plan Assets target allocation) (Details)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
US [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	60.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	80.00%
Defined Benefit Plan, Actual Plan Asset Allocations	65.00%	68.00%
US [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	20.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	30.00%
Defined Benefit Plan, Actual Plan Asset Allocations	28.00%	25.00%
US [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	10.00%
Defined Benefit Plan, Actual Plan Asset Allocations	7.00%	7.00%
US [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	0.00%
Defined Benefit Plan, Actual Plan Asset Allocations	0.00%	0.00%
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
International [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	55.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	67.00%
Defined Benefit Plan, Actual Plan Asset Allocations	60.00%	59.00%
International [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	32.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	43.00%
Defined Benefit Plan, Actual Plan Asset Allocations	38.00%	40.00%
International [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	2.00%
Defined Benefit Plan, Actual Plan Asset Allocations	1.00%	0.00%
International [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	0.00%
Defined Benefit Plan, Actual Plan Asset Allocations	1.00%	1.00%

Retirement Benefits (Pension pl

Retirement Benefits (Pension plan assets at fair value by asset class) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 245.2	$ 226.1	$ 219.2
Level 3 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	192.1	174.2	150.2
Level 3 [Member] | Pooled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7.3	6.6	9.3
Level 3 [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	45.8	45.3	59.7
US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,705.3	2,613.6	2,746.2
US [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	12.7	11.1
US [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	637	681.7
US [Member] | Equity Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	300.2	480.1
US [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	815.5	615.1
US [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	747.8	651.4
US [Member] | Collateralized Mortgage Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	192.1	174.2
US [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	949.9	1,172.9
US [Member] | Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	12.7	11.1
US [Member] | Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	637	681.7
US [Member] | Level 1 [Member] | Equity Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	300.2	480.1
US [Member] | Level 1 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 1 [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 1 [Member] | Collateralized Mortgage Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 1 [Member] | Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 1 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,563.3	1,266.5
US [Member] | Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 2 [Member] | Equity Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 2 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	815.5	615.1
US [Member] | Level 2 [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	747.8	651.4
US [Member] | Level 2 [Member] | Collateralized Mortgage Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 2 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 2 [Member] | Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 2 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	192.1	174.2
US [Member] | Level 3 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 3 [Member] | Equity Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 3 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 3 [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 3 [Member] | Collateralized Mortgage Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 3 [Member] | Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US [Member] | Level 3 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	192.1	174.2
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,411.1	1,302.8	$ 1,368.4
International [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.6	10.1
International [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	854.8	766.9
International [Member] | Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	486.9	465.6
International [Member] | Pooled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	17	14.9
International [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	45.8	45.3
International [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.6	10.1
International [Member] | Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.6	10.1
International [Member] | Level 1 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International [Member] | Level 1 [Member] | Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International [Member] | Level 1 [Member] | Pooled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International [Member] | Level 1 [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,351.4	1,240.8
International [Member] | Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International [Member] | Level 2 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	854.8	766.9
International [Member] | Level 2 [Member] | Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	486.9	465.6
International [Member] | Level 2 [Member] | Pooled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	9.7	8.3
International [Member] | Level 2 [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	53.1	51.9
International [Member] | Level 3 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International [Member] | Level 3 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International [Member] | Level 3 [Member] | Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International [Member] | Level 3 [Member] | Pooled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7.3	6.6
International [Member] | Level 3 [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 45.8	$ 45.3

Retirement Benefits (Projected

Retirement Benefits (Projected benefit payments) (Details) $ in Millions	Sep. 30, 2016USD ($)
US [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	$ 150.3
2,018	152.7
2,019	157.2
2,020	161.8
2,021	166.7
2022 - 2026	909.6
International [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	45.7
2,018	48.3
2,019	50.2
2,020	51.1
2,021	54.3
2022 - 2026	306.9
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	11.5
2,018	11
2,019	10.7
2,020	10.2
2,021	9.7
2022 - 2026	$ 35.3

Retirement Benefits (Summary of

Retirement Benefits (Summary of changes in pension plan assets fair value classified as level 3) (Details) - Level 3 [Member] - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	$ 226.1	$ 219.2
Actual return on plan assets:
Assets held at end of year	21.2	12.7
Assets sold during the period	0.3	0.5
Purchases, sales, and settlements, net	(2.4)	(6.3)
Fair Value at End of Year	245.2	226.1
Pooled Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	6.6	9.3
Actual return on plan assets:
Assets held at end of year	0.1	(0.2)
Assets sold during the period	0.3	0.5
Purchases, sales, and settlements, net	0.3	(3)
Fair Value at End of Year	7.3	6.6
Real Estate [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	174.2	150.2
Actual return on plan assets:
Assets held at end of year	17.9	24
Assets sold during the period	0	0
Purchases, sales, and settlements, net	0	0
Fair Value at End of Year	192.1	174.2
Insurance Contracts [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	45.3	59.7
Actual return on plan assets:
Assets held at end of year	3.2	(11.1)
Assets sold during the period	0	0
Purchases, sales, and settlements, net	(2.7)	(3.3)
Fair Value at End of Year	$ 45.8	$ 45.3

Retirement Benefits (Assumed he

Retirement Benefits (Assumed heathcare trend rates) (Details)	12 Months Ended
	Sep. 30, 2015
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Healthcare trend rate	7.00%
Ultimate trend rate	5.00%
Year the ultimate trend rate is reached	2,019

Commitments and Contingencie120

Commitments and Contingencies (Litigation and Environmental) (Narrative) (Details) BRL in Millions, $ in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2010BRL	Sep. 30, 2016USD ($)	Sep. 30, 2016BRLSites	Sep. 30, 2016USD ($)Sites	Sep. 30, 2015USD ($)
Environmental [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies				$ 81.4	$ 80.6
Approximate number of sites on which settlement has not been reached | Sites			33	33
Accrual for environmental loss contingencies, Minimum exposure				$ 81
Accrual for environmental loss contingencies, Maximum exposure				95
Alleged Anticompete Litigation [Member]
Loss Contingencies [Line Items]
Civil fines imposed	BRL 179.2	$ 55
Provision for litigation		$ 0
Maximum of loss contingency range subject to interest			BRL 179.2	$ 55

Commitments and Contingencie121

Commitments and Contingencies (Pace) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2006
Loss Contingencies [Line Items]
Pretax environmental expense	$ 27	$ 28.3	$ 35.1
Pace, Florida [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 30.1			$ 42
Years to complete environmental remediation	20 years beginning in 2006
Change in estimated exposure	$ 0
Environmental loss contingencies estimated costs through completion, maximum	52
Environmental loss contingencies estimated costs through completion, minimum	$ 42
Segment Discontinued Operations Member | Pace, Florida [Member]
Loss Contingencies [Line Items]
Pretax environmental expense				$ 42

Commitments and Contingencie122

Commitments and Contingencies (Piedmont) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2008
Loss Contingencies [Line Items]
Pretax environmental expense	$ 27	$ 28.3	$ 35.1
Piedmont, Florida [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 17.5			$ 24
Years to complete environmental remediation	until 2019 to complete source area remediation with groundwater recovery and treatment, continuing through 2029.
Change in estimated exposure	$ 0
Total anticipated exposure at this site				24
Segment Discontinued Operations Member | Piedmont, Florida [Member]
Loss Contingencies [Line Items]
Pretax environmental expense				$ 24

Commitments and Contingencie123

Commitments and Contingencies (Pasadena) (Narrative) (Details) - Pasadena Texas Member [Member] - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2012
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 10.4
Years to complete environmental remediation	until 2,042
Total anticipated exposure at this site		$ 13
Change in estimated exposure	$ 0

Commitments and Contingencie124

Commitments and Contingencies (Asset Retirement Obligations) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Asset Retirement Obligation [Abstract]
Asset retirement obligations	$ 119.9	$ 109.4	$ 94
Additional accruals	10.4	17.6
Liabilities settled	(4.4)	(3.6)
Accretion expense	5.4	4.7
Currency translation adjustment	$ (0.9)	$ (3.3)

Commitments and Contingencie125

Commitments and Contingencies (Guarantees and Other) (Narrative) (Details) £ in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2016GBP (£)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)
Guarantor Obligations [Line Items]
Equity contributions or payments required		$ 0
Obligation for future contribution to equity affiliate		94.4	$ 67.5
Unrecorded Unconditional Purchase Obligation [Line Items]
2,017		942
Unconditional purchase obligation		$ 5,331
Jazan [Member]
Guarantor Obligations [Line Items]
Percentage share of loan	25.00%	25.00%
Equity method investment, ownership percentage	25.00%	25.00%
Obligation for future contribution to equity affiliate		$ 94.4
HYCO Feedstock Supply [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unconditional purchase obligation		330
Purchase commitments - additional plant and equipment [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2,017		350
Helium Purchases [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unconditional purchase obligation		4,000
Jazan [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2017 and 2018		$ 500
Trinidad Facility [Member]
Guarantor Obligations [Line Items]
Equity method investment, ownership percentage	50.00%	50.00%
Maximum potential payment under guarantees		$ 29
Exposures under the guarantee completion year	by 2,024
U K and Ireland Homecare Business [Member]
Guarantor Obligations [Line Items]
Maximum potential payment under guarantees	£ 20	25
Exposures under the guarantee completion year	by 2,020
Parent Guarantee [Member] | Jazan [Member]
Guarantor Obligations [Line Items]
Maximum potential payment under guarantees		100
Exposures under the guarantee completion year	until 2,020
Bank Guarantee [Member] | Jazan [Member]
Guarantor Obligations [Line Items]
Maximum potential payment under guarantees		$ 311

Commitments and Contingencie126

Commitments and Contingencies (Purchase Obligation) (Details) $ in Millions	Sep. 30, 2016USD ($)
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2,017	$ 942
2,018	525
2,019	307
2,020	298
2,021	276
Thereafter	2,983
Total	$ 5,331

Capital Stock (Common Stock) (N

Capital Stock (Common Stock) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Sep. 15, 2011
Capital Stock [Abstract]
Common stock, authorized shares	300,000,000
Common stock, par value	$ 1	$ 1
Common stock, issued shares	249,455,584	249,455,584
Common stock, shares outstanding	217,350,825	215,359,113	213,538,144	211,179,257
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during period, shares	0	0	0
Share repurchase authorization remaining, amount	$ 485.3
Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Share repurchase program authorized amount					$ 1,000

Capital Stock (Changes in Commo

Capital Stock (Changes in Common Shares) (Details) - shares	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of year	215,359,113	213,538,144	211,179,257
Purchase of treasury shares	0	0	0
Issuance of treasury shares for stock option and award plans	1,991,712	1,820,969	2,358,887
Balance, end of year	217,350,825	215,359,113	213,538,144

Capital Stock (Preferred Stock)

Capital Stock (Preferred Stock) (Narrative) (Details) - $ / shares shares in Millions	Sep. 30, 2016	Sep. 30, 2015
Class of Stock [Line Items]
Preferred stock, shares authorized	25
Perferred stock, par value, per share	$ 1
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Series A Junior Participating Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized	2.5
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

Share-Based Compensation (Narra

Share-Based Compensation (Narratives) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Award [Line Items]
Shares available for future grant	4,840,837
Deferred Stock Units [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Number of units/shares granted	284,000
Weighted-average grant date fair value of units/shares	$ 136.37
Cash payments made for deferred stock units	$ 2.9	$ 9.6	$ 2.1
Unrecognized compensation costs	$ 41.4
Unrecognized compensation costs, period for recognition, years	2 years 2 months
Fair value of deferred stock units paid	$ 41.6	$ 35.5	$ 31.8
Deferred Stock Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Vesting or deferral Period	2 years
Deferred Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Vesting or deferral Period	5 years
Director Deferred Stock Units [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Period after service in which to elect payment	10 years
Market-Based Deferred Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Number of units/shares granted	130,167	119,272
Vesting or deferral Period	3 years
Weighted-average grant date fair value of units/shares	$ 135.49	$ 194.51
Time-Based Deferred Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Number of units/shares granted	153,792
Weighted-average grant date fair value of units/shares	$ 137.12
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Exercisable period from grant date	10 years
Vesting or deferral Period	3 years
Weighted-average grant date fair value of stock option		$ 37.19	$ 29.1
Closing stock price	$ 150.34
Intrinsic value of stock options exercised	$ 115.3	$ 115.5	$ 125.3
Unrecognized compensation costs	$ 1.1
Unrecognized compensation costs, period for recognition, years	11 months
Cash received from option exercises	$ 141.3
Tax benefit realized from stock option exericses	39.8
Excess tax benefit	$ 25
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Number of units/shares granted	33,000
Weighted-average grant date fair value of units/shares	$ 138
Unrecognized compensation costs	$ 5.1
Unrecognized compensation costs, period for recognition, years	2 years 7 months
Fair value of vested restricted stock	$ 4.3	$ 1.4	$ 12.1
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Vesting or deferral Period	1 year
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Vesting or deferral Period	4 years

Share-Based Compensation (Compe

Share-Based Compensation (Compensation Cost Recognized in Income Statement) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Before-Tax Share-Based Compensation	$ 37.6	$ 45.7	$ 44
Income Tax Benefit	(13.1)	(16)	(15.6)
After-Tax Share-Based Compensation	$ 24.5	$ 29.7	$ 28.4

Share-Based Compensation (Total

Share-Based Compensation (Total Before Tax Share Based Compensation Cost by Type of Program) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	$ 37.6	$ 45.7	$ 44
Deferred Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	29.9	28.8	20.2
Employee Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	4.2	12.6	21.6
Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	$ 3.5	$ 4.3	$ 2.2

Share-Based Compensation (Marke

Share-Based Compensation (Market-Based Deferred Stock Unit Valuation Assumptions)(Details) - Market-Based Deferred Stock Unit [Member]	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Award [Line Items]
Expected volatility	20.50%	19.60%
Risk-free interest rate	1.20%	0.90%
Expected dividend yield	2.20%	2.50%

Share-Based Compensation (Summa

Share-Based Compensation (Summary of Deferred Stock Units Activity) (Details) - Deferred Stock Units [Member] shares in Thousands	12 Months Ended
	Sep. 30, 2016$ / sharesshares
Share Based Compensation Arrangement By Share-Based Payment Award NonOption Equity Instruments Outstanding [RollForward]
Outstanding - Shares, Beginning | shares	1,056
Granted - Shares | shares	284
Paid out - Shares | shares	(299)
Forfeited/adjustments - Shares | shares	(40)
Outstanding - Shares, Ending | shares	1,001
Outstanding - Weighted Average Grant Date Fair Value, Beginning | $ / shares	$ 102.01
Granted - Weighted Average Grant Date Fair Value | $ / shares	136.37
Paid out - Weighted Average Grant Date Fair Value | $ / shares	77.81
Forfeited/adjustments - Weighted Average Grant Date Fair Value | $ / shares	90.83
Outstanding - Weighted Average Grant Date Fair Value, Ending | $ / shares	$ 119.44

Share-Based Compensation (Stock

Share-Based Compensation (Stock Option Valuation Assumptions) (Details) - Employee Stock Options [Member]	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Award [Line Items]
Expected volatility	30.30%
Expected volatility, minimum		29.80%
Expected volatility, maximum		31.10%
Expected dividend yield	2.60%
Expected life (in years)	7 years 6 months
Risk-free interest rate	2.20%
Risk-free interest rate, minimum		2.00%
Risk-free interest rate, maximum		2.70%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Expected dividend yield		2.40%
Expected life (in years)		6 years 6 months
Maximum [Member]
Share-based Compensation Arrangement by Share-based Award [Line Items]
Expected dividend yield		2.90%
Expected life (in years)		8 years 5 months

Share-Based Compensation (Su136

Share-Based Compensation (Summary of Stock Option Activity) (Details) shares in Thousands	12 Months Ended
	Sep. 30, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding-Shares, Beginning | shares	5,725
Granted-Shares | shares	0
Exercised-Shares | shares	(1,783)
Forfeited-Shares | shares	(26)
Outstanding-Shares, Ending | shares	3,916
Exercisable-Shares | shares	3,537
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding-Weighted Average Exercise Price, Beginning | $ / shares	$ 87.35
Granted-Weighted Average Exercise Price | $ / shares	0
Exercised-Weighted Average Exercise Price | $ / shares	80.66
Forfeited-Weighted Average Exercise Price | $ / shares	106.52
Outstanding-Weighted Average Exercise Price, Ending | $ / shares	90.28
Exercisable-Weighted Average Exercise Price | $ / shares	$ 86.99

Share-Based Compensation (Su137

Share-Based Compensation (Summary of Stock Option Contract Term and Intrinsic Value) (Details) $ in Millions	12 Months Ended
	Sep. 30, 2016USD ($)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Terms, Outstanding	5 years
Aggregated Intrinsic Value, Outstanding	$ 235
Weighted Average Remaining Contractual Terms, Exercisable	4 years 8 months
Aggregated Intrinsic Value, Exercisable	$ 224

Share-Based Compensation (Su138

Share-Based Compensation (Summary Of Restricted Stock) (Details) - Restricted Stock [Member] shares in Thousands	12 Months Ended
	Sep. 30, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding - Shares, Beginning | shares	83
Granted - Shares | shares	33
Vested - Shares | shares	(31)
Outstanding - Shares, Ending | shares	85
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding - Weighted Average Grant Date Fair Value, Beginning | $ / shares	$ 121.17
Granted - Weighted Average Grant Date Fair Value | $ / shares	138
Vested - Weighted Average Grant Date Fair Value | $ / shares	119.95
Outstanding - Weighted Average Grant Date Fair Value, Ending | $ / shares	$ 128.16

Accumulated Other Comprehens139

Accumulated Other Comprehensive Loss (Rollforward) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ (2,125.9)	$ (1,241.9)	$ (1,020.6)
Other comprehensive income (loss) before reclassifications	(311.5)	(1,012.8)	(302.5)
Amounts reclassified from AOCL	53.9	117.8	75.6
Net current period other comprehensive income (loss)	(257.6)	(895)	(226.9)
Amount attributable to noncontrolling interest	4.8	(11)	(5.6)
Ending Balance	(2,388.3)	(2,125.9)	(1,241.9)
Net loss on derivatives qualifying as hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(42.9)	(28.5)	(4.1)
Other comprehensive income (loss) before reclassifications	13.7	(35)	(15.2)
Amounts reclassified from AOCL	(36)	20.8	(9.1)
Net current period other comprehensive income (loss)	(22.3)	(14.2)	(24.3)
Amount attributable to noncontrolling interest	(0.2)	0.2	0.1
Ending Balance	(65)	(42.9)	(28.5)
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(956.5)	(268.7)	(61.5)
Other comprehensive income (loss) before reclassifications	9.9	(699.3)	(213.1)
Amounts reclassified from AOCL	2.7	0	0
Net current period other comprehensive income (loss)	12.6	(699.3)	(213.1)
Amount attributable to noncontrolling interest	5.4	(11.5)	(5.9)
Ending Balance	(949.3)	(956.5)	(268.7)
Pension and postretirement benefits [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(1,126.5)	(944.7)	(955)
Other comprehensive income (loss) before reclassifications	(335.1)	(278.5)	(74.2)
Amounts reclassified from AOCL	87.2	97	84.7
Net current period other comprehensive income (loss)	(247.9)	(181.5)	10.5
Amount attributable to noncontrolling interest	(0.4)	0.3	0.2
Ending Balance	$ (1,374)	$ (1,126.5)	$ (944.7)

Accumulated Other Comprehens140

Accumulated Other Comprehensive Loss (Reclassification) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net										$ 58.1	$ 47.3	$ 52.8
Interest expense										115.5	103.5	125.1
Net income (loss) attributable to Air Products		$ 394	$ 346.8	$ (473.3)	$ 363.6	$ 344.5	$ 318.8	$ 290	$ 324.6	631.1	1,277.9	991.7
Income (Loss) from discontinued operations, net of tax										(884.2)	(6.8)	(2.9)
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | (Gain) Loss on Cash Flow Hedges [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Sales/cost of sales										(0.2)	(0.6)	(0.7)
Other income (expense), net										46.2	(16.9)	8.7
Interest expense										10	3.3	(1.1)
Net income (loss) attributable to Air Products										36	(20.8)	9.1
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Pension and postretirement benefits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net income (loss) attributable to Air Products	[1]									(87.2)	(97)	(84.7)
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Accumulated Translation Adjustment [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net income (loss) attributable to Air Products	[2]									$ (2.7)	$ 0	$ 0
[1]	The components include items such as prior service cost amortization, actuarial loss amortization, and settlements and are reflected in net periodic benefit cost. Refer to Note 16, Retirement Benefits.
[2]	The impact is reflected in Other income (expense), net and primarily relates to the sale of an equity affiliate in the first quarter of 2016. Refer to Note 8, Summarized Financial Information of Equity Affiliates.

Noncontrolling Interests (Narra

Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jul. 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015
Noncontrolling Interest [Line Items]
Payment for repurchase of redeemable noncontrolling interest			$ 277.9
Goodwill and intangible asset impairment charge		$ 0	$ 0	$ 310.1
Indura [Member]
Noncontrolling Interest [Line Items]
Minority interest ownership percentage under put option					30.50%
Percentage equity interest purchased	30.50%
Payment for repurchase of redeemable noncontrolling interest	$ 277.9
Sale of Stock, Percentage of Ownership after Transaction		97.80%

Noncontrolling Interests (Rollf

Noncontrolling Interests (Rollforward Redeemable Noncontrolling Interest) (Details) $ in Millions	12 Months Ended
	Sep. 30, 2015USD ($)
Redeemable Noncontrolling Interest [Line Items]
Balance, beginning of period	$ 287.2
Net income (loss)	11.5
Dividends	(2)
Purchase of noncontrolling interest	(277.9)
Currency translation adjustment	(18.8)
Balance, end of period	$ 0

Earnings per Share (Schedule of

Earnings per Share (Schedule of Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share
Income from continuing operations	$ 402	$ 355.7	$ 379.8	$ 377.8	$ 346	$ 320.5	$ 291.9	$ 326.3	$ 1,515.3	$ 1,284.7	$ 994.6
Income from discontinued operations	(8)	(8.9)	(853.1)	(14.2)	(1.5)	(1.7)	(1.9)	(1.7)	(884.2)	(6.8)	(2.9)
Net Income Attributable to Air Products	$ 394	$ 346.8	$ (473.3)	$ 363.6	$ 344.5	$ 318.8	$ 290	$ 324.6	$ 631.1	$ 1,277.9	$ 991.7
Weighted average number of common shares outstanding									216.4	214.9	212.7
Employee stock option and other award plans									1.9	2.4	2.5
Weighted average number of common shares outstanding assuming dilution									218.3	217.3	215.2
Income from Continuing Operations, Basic	$ 1.85	$ 1.64	$ 1.76	$ 1.75	$ 1.61	$ 1.49	$ 1.36	$ 1.53	$ 7	$ 5.98	$ 4.68
Income (loss) from Discontinued Operations, Basic	(0.04)	(0.04)	(3.95)	(0.07)	(0.01)	(0.01)	(0.01)	(0.01)	(4.08)	(0.03)	(0.02)
Net Income Attributable to Air Products	1.81	1.6	(2.19)	1.68	1.6	1.48	1.35	1.52	2.92	5.95	4.66
Income from Continuing Operations, Diluted	1.84	1.63	1.74	1.73	1.59	1.48	1.34	1.51	6.94	5.91	4.62
Income from Discontinued Operations, Diluted	(0.04)	(0.04)	(3.91)	(0.06)	(0.01)	(0.01)	(0.01)	(0.01)	(4.05)	(0.03)	(0.01)
Net Income Attributable to Air Products	$ 1.8	$ 1.59	$ (2.17)	$ 1.67	$ 1.58	$ 1.47	$ 1.33	$ 1.5	$ 2.89	$ 5.88	$ 4.61

Earnings per Share (Narrative)

Earnings per Share (Narrative) (Details) - shares shares in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share
Antidilutive options excluded from computation of diluted earnings per share	0.2	0.2	0.6

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2016	Sep. 30, 2013
Income Taxes [Line Items]
Cash paid for taxes (net of cash refunds)		$ 440.8	$ 392.9	$ 160.6
U.S. federal statutory tax rate		35.00%	35.00%	35.00%
Goodwill impairment charge	$ 305.2
Goodwill impairment charge deductible for tax purposes				$ 0
Tax credits and other tax carryforwards		$ 56	$ 43.8
Tax loss carryforwards		93	116.7
Deferred tax assets, valuation allowance		$ 155.2	103.6
Percentage of the undistributed earnings in countries with a statutory tax rate of 24% or higher		80.00%
Statutory tax rate percentage or higher		24.00%
Business separation additional income tax expense		$ 51.8
Foreign earnings repatriated		443.8
Cumulative undistributed earnings		6,300.9
US Income and foreign withholding taxes estimate		1,467.8
Unrecognized tax benefits	$ 108.7	106.9	97.5	108.7		$ 124.3
Unrecognized tax benefits that would impact effective tax rate		64.5	62.5
Interest and penalties related to unrecognized tax benefits		2.3	(1.8)	1.2
Accrued interest and penalties		9.8	7.5
Unrecognized tax benefits, decreases resulting from prior period tax positions		0.3	7.9	14.6
Unrecognized tax benefits,decreases resulting from settlements with taxing authorities		5.6	$ 0.6	$ 0
Chilean Tax Rate Change [Member]
Income Taxes [Line Items]
Effective income tax rate reconciliation, change in enacted tax rate				1.50%
Income tax expense from tax reform				$ 20.6
Non-U.S. Subsidiary Tax Election [Member]
Income Taxes [Line Items]
Increase (decrease) in income tax expense				$ (51.6)
Federal [Member]
Income Taxes [Line Items]
Capital loss carryforwards		137.1
Tax credit carryforwards		$ 25.7
Federal [Member] | Capital Loss Carryforward [Member]
Income Taxes [Line Items]
Tax carryforward expiration period end		2,019
Tax loss carryforwards		$ 48
Federal [Member] | Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Tax carryforward expiration period start		2,025
Federal [Member] | Loss and Tax Credit Member [Member]
Income Taxes [Line Items]
Tax carryforward expiration period end		2,026
Foreign [Member]
Income Taxes [Line Items]
Tax credit carryforwards		$ 27
Operating loss carryforwards		155
Unused carryforwards and credits that have an expiration period		119.5
Tax loss carryforwards		$ 37.7
Foreign [Member] | Loss and Tax Credit Member [Member]
Income Taxes [Line Items]
Tax carryforward expiration period start		2,017
Tax carryforward expiration period end		2,026
State [Member]
Income Taxes [Line Items]
Tax credit carryforwards		$ 3.3
Operating loss carryforwards		$ 123.2
State [Member] | Loss and Tax Credit Member [Member]
Income Taxes [Line Items]
Tax carryforward expiration period start		2,018
Tax carryforward expiration period end		2,034
Energy From Waste [Member]
Income Taxes [Line Items]
Deferred tax assets, valuation allowance					$ 58
Deferred tax assets capital loss carryforwards		$ 58
Unrecognized tax benefits					$ 7.9

Income Taxes (Income Of U.S And

Income Taxes (Income Of U.S And Foreign Operations Before Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, United States	$ 897.5	$ 742	$ 562.2
Income (Loss) from Continuing Operations before Income Taxes, Foreign	1,086.1	846.2	651.8
Income (Loss) from Equity Method Investments	148.6	154.5	151.4
Income from Continuing Operations before Taxes	$ 2,132.2	$ 1,742.7	$ 1,365.4

Income Taxes (Components of the

Income Taxes (Components of the Income Taxes Provision) (Details) - USD ($) $ in Millions	3 Months Ended											12 Months Ended
	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016		Sep. 30, 2015	Sep. 30, 2014
Current Income Tax Expense
Federal, Current												$ 237.9		$ 177.1	$ 19.3
State, Current												29.1		16.9	13
Foreign, Current												256.6		221.4	211.6
Current Tax Provision												523.6		415.4	243.9
Deferred Income Tax Expense
Federal, Deferred												42.2		(3.5)	98.2
State, Deferred												3.6		19.1	(2.7)
Foreign, Deferred												17.1		(12.7)	30
Deferred Tax Provision												62.9		2.9	125.5
Income tax provision	$ 138.6		$ 179.5		$ 132.5		$ 135.9	$ 119.4	$ 104.1	$ 87.7	$ 107.1	$ 586.5	[1]	$ 418.3	$ 369.4
[1]	Includes income tax expense for tax costs associated with business separation. For additional information, see Note 3, Materials Technologies Separation.

Income Taxes (Effective Tax Rat

Income Taxes (Effective Tax Rate Reconciliation) (Details)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
U.S. federal statutory tax rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	1.10%	1.00%	0.50%
Income from equity affiliates	(2.40%)	(3.00%)	(3.90%)
Foreign tax differentials	(7.00%)	(6.60%)	(8.20%)
U.S. taxes on foreign earnings	(2.30%)	(1.60%)	(1.70%)
Domestic production activities	(0.80%)	(0.90%)	(0.70%)
Non-deductible goodwill impairment charge	0.00%	0.00%	8.00%
Non-U.S. subsidiary tax election	0.00%	0.00%	(3.80%)
Business separation costs	3.10%	0.20%	0.00%
Other	0.80%	(0.10%)	1.90%
Effective Tax Rate	27.50%	24.00%	27.10%

Income Taxes (Significant Compo

Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Deferred Tax Assets, Gross [Abstract]
Retirement benefits and compensation accruals	$ 537.9	$ 468.7
Tax loss carryforwards	93	116.7
Tax credits and other tax carryforwards	56	43.8
Reserves and accruals	80.1	71.9
Partnership and other investments	4.8	6.2
Other	45.8	66.3
Valuation allowance	(155.2)	(103.6)
Deferred Tax Assets	662.4	670
Deferred Tax Liabilities, Gross [Abstract]
Plant and equipment	1,034.8	1,124.6
Currency gains	46.4	65.7
Unremitted earnings of foreign entities	5.4	62.7
Intangible assets	134.1	135.6
Other	16.1	2.1
Deferred Tax Liabilities	1,236.8	1,390.7
Net Deferred Income Tax Liabilities	$ 574.4	$ 720.7

Income Taxes (Deferred Tax Asse

Income Taxes (Deferred Tax Assets And Liabilities Included In Consolidated Financials) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Deferred Tax Assets [Abstract]
Other noncurrent assets	$ 192.7	$ 82.7
Deferred Tax Liabilities [Abstract]
Deferred income taxes	767.1	803.4
Net Deferred Income Tax Liabilities	$ 574.4	$ 720.7

Income Taxes (Reconciliation Of

Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 97.5	$ 108.7	$ 124.3
Additions for tax positions of the current year	15	6.9	8.1
Additions for tax positions of prior years	3.8	7.5	4.9
Reductions for tax positions of prior years	(0.3)	(7.9)	(14.6)
Settlements	(5.6)	(0.6)	0
Statute of limitations expiration	(3)	(11.2)	(14)
Foreign currency translation adjustment decrease	(0.5)	(5.9)	0
Balance at End of Year	$ 106.9	$ 97.5	$ 108.7

Income Taxes (Summary Of Income

Income Taxes (Summary Of Income Tax Examinations) (Details)	12 Months Ended
	Sep. 30, 2016
North America [Member] | United States | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,011
North America [Member] | United States | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
North America [Member] | Canada | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,012
North America [Member] | Canada | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Europe [Member] | France | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,013
Europe [Member] | France | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Europe [Member] | Germany | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,011
Europe [Member] | Germany | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Europe [Member] | Netherlands | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,011
Europe [Member] | Netherlands | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Europe [Member] | Spain | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,011
Europe [Member] | Spain | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Europe [Member] | United Kingdom | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,013
Europe [Member] | United Kingdom | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Asia [Member] | China | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,010
Asia [Member] | China | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Asia [Member] | Singapore | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,010
Asia [Member] | Singapore | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Asia [Member] | South Korea | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,010
Asia [Member] | South Korea | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Asia [Member] | Taiwan | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,011
Asia [Member] | Taiwan | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016
Latin America [Member] | Chile | Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,013
Latin America [Member] | Chile | Maximum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,016

Supplemental Information (Other

Supplemental Information (Other Receivables and Current Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Supplemental Information [Abstract]
Derivative instruments	$ 170.9	$ 72.9
Other receivables	197.5	167.6
Current capital lease receivables	88.2	84.2
Prepaid inventory	92.8	0
Other	6.2	18.8
Other receivables and current assets, total	$ 555.6	$ 343.5

Supplemental Information (Ot154

Supplemental Information (Other Noncurrent Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Supplemental Information [Abstract]
Derivative instruments	$ 204.4	$ 246
Other long-term receivables	20.6	21.4
Deferred financing cost, net	29.6	20.2
Prepaid tax	53.5	31.3
Deferred tax assets	192.7	82.7
Deposits	36.5	40.1
Other	200	206.9
Other noncurrent assets total	$ 737.3	$ 648.6

Supplemental Information (Payab

Supplemental Information (Payables and Accrued Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Supplemental Information [Abstract]
Trade creditors	$ 676.1	$ 621.9
Customer advances	376.1	195.3
Accrued payroll and employee benefits	262.6	272.9
Pension and postretirement benefits	35.5	26.1
Dividends payable	186.9	174.4
Outstanding payments in excess of certain cash balances	11.9	27.5
Accrued interest expense	47.9	52.9
Derivative instruments	74	114.6
Severance and other costs associated with business restructuring and cost reduction actions	16.3	41.7
Other	123.3	114.4
Payables and accrued liabilities total	$ 1,810.6	$ 1,641.7

Supplemental Information (Ot156

Supplemental Information (Other Noncurrent Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Liabilities, Noncurrent [Abstract]
Pension benefits	$ 1,186.8	$ 860
Postretirement benefits	74.9	76.5
Other employee benefits	108.3	106.7
Contingencies related to uncertain tax positions	95.6	91.1
Advance payments	43.8	135.1
Environmental liabilities	70.3	71.6
Derivative instruments	21.8	10.6
Asset retirement obligations	116.1	106.5
Obligation for future contribution to equity affiliate	94.4	67.5
Other	61.4	28.4
Other noncurrent liabilities total	$ 1,873.4	$ 1,554

Supplemental Information (Ot157

Supplemental Information (Other Income Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Other Income (Expense) [Abstract]
Technology and royalty income	$ 20.1	$ 25	$ 26.8
Interest income	6.2	4.6	9.4
Foreign exchange	(5.8)	(22.3)	(7.7)
Sale of assets and investments	10.1	37.1	12.5
Contract settlements	12.6	0	2.8
Other	14.9	2.9	9
Total Other Income (Expense), net	$ 58.1	$ 47.3	$ 52.8

Supplemental Information (Narra

Supplemental Information (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions

3 Months Ended

12 Months Ended

Sep. 30, 2015

Jun. 30, 2015

[1]

Mar. 31, 2015

[1]

Dec. 31, 2014

[1]

Sep. 30, 2016

Sep. 30, 2015

Sep. 30, 2014

Supplemental Information [Line Items]

Gain on land sales

$ 10.1

$ 37.1

$ 12.5

Segment Reconciling Items [Member]

Supplemental Information [Line Items]

Gain on land sales

$ 33.6

[1]

$ 0

$ 0

$ 0

$ 0

[2]

$ 33.6

[1],[2]

$ 0

[2]

Gain on land sales, after-tax

$ 28.3

Gain on land sales, per share

$ 0.13

[1]

The gain is reflected on the consolidated income statements in “Other income (expense), net.” For additional information, see Note 24, Supplemental Information.

[2]

Reflected on the consolidated income statements in "Other income (expense), net."

Summary by Quarter (Unaudite159

Summary by Quarter (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended																12 Months Ended
	Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 2,463		$ 2,434.4		$ 2,271.2		$ 2,355.8		$ 2,449.4		$ 2,470.2		$ 2,414.5		$ 2,560.8		$ 9,524.4		$ 9,894.9		$ 10,439
Gross profit	814.3	[1]	795.1	[1]	752.2	[1]	760.1	[1]	753.5		755		716.3		731.1		3,121.7	[1]	2,955.9
Business separation costs, before tax	23.3	[2]	9.5	[2]	7.4	[2]	12	[2]	7.5	[2]	0	[2]	0	[2]	0	[2]	52.2	[2]	7.5	[2]	0
Business restructuring and cost reduction actions	11.1	[3]	14.2	[3]	8.6	[3]	0	[3]	61.7	[3]	58.2	[3]	55.4	[3]	32.4	[3]	33.9	[3]	207.7	[3]	12.7
Pension settlement loss	2.8	[4]	1	[4]	2.6	[4]	0	[4]	7	[4]	1.6	[4]	12.6	[4]	0	[4]	6.4	[4]	21.2	[4]	5.5
Gain on previously held equity interest									0	[5]	0	[5]	0	[5]	17.9	[5]	0		17.9		0
Gain on land sales																	10.1		37.1		12.5
Operating income (loss)	547		535.1		513.3		510.6		474.3		424.8		376.9		432.3		2,106		1,708.3		1,339.1
Loss on extinguishment of debt	6.9	[6]	0	[6]	0	[6]	0	[6]	16.6	[6]	0	[6]	0	[6]	0	[6]	6.9	[6]	16.6	[6]	0
Income tax provision	138.6	[7]	179.5	[7]	132.5	[7]	135.9		119.4		104.1		87.7		107.1		586.5	[7]	418.3		369.4
Net income	400.9		354.1		(465.5)		372		350		333.2		296.9		337.5		661.5		1,317.6		993.1
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract]
Income from continuing operations attributable to Air Products	402		355.7		379.8		377.8		346		320.5		291.9		326.3		1,515.3		1,284.7		994.6
Income (Loss) from discontinued operations, net of tax, attributable to Air Products	(8)		(8.9)		(853.1)		(14.2)		(1.5)		(1.7)		(1.9)		(1.7)		(884.2)		(6.8)		(2.9)
Net Income Attributable to Air Products	$ 394		$ 346.8		$ (473.3)		$ 363.6		$ 344.5		$ 318.8		$ 290		$ 324.6		$ 631.1		$ 1,277.9		$ 991.7
Basic Earnings Per Common Share Attributable to Air Products
Income from continuing operations	$ 1.85		$ 1.64		$ 1.76		$ 1.75		$ 1.61		$ 1.49		$ 1.36		$ 1.53		$ 7		$ 5.98		$ 4.68
Income (loss) from discontinued operations	(0.04)		(0.04)		(3.95)		(0.07)		(0.01)		(0.01)		(0.01)		(0.01)		(4.08)		(0.03)		(0.02)
Net Income Attributable to Air Products	1.81		1.6		(2.19)		1.68		1.6		1.48		1.35		1.52		2.92		5.95		4.66
Diluted Earnings Per Common Share Attributable to Air Products
Income from continuing operations	1.84		1.63		1.74		1.73		1.59		1.48		1.34		1.51		6.94		5.91		4.62
Income (loss) from discontinued operations	(0.04)		(0.04)		(3.91)		(0.06)		(0.01)		(0.01)		(0.01)		(0.01)		(4.05)		(0.03)		(0.01)
Net Income Attributable to Air Products	1.8		1.59		(2.17)		1.67		1.58		1.47		1.33		1.5		2.89		5.88		4.61
Dividends per common share	0.86		0.86		0.86		0.81		0.81		0.81		0.81		0.77		$ 3.39		$ 3.2		$ 3.02
Market Price Per Share High	157.84		152.16		147.16		143.83		148.56		153.93		158.2		149.61
Market Price Per Share Low	$ 137.31		$ 134.15		$ 114.64		$ 126.65		$ 123.66		$ 136.69		$ 137.07		$ 118.2
Segment Reconciling Items [Member]
Quarterly Financial Information Disclosure [Abstract]
Business separation costs, before tax																	$ 52.2		$ 7.5		$ 0
Business restructuring and cost reduction actions																	33.9		207.7		12.7
Pension settlement loss																	6.4		21.2		5.5
Gain on previously held equity interest																	0		17.9		0
Gain on land sales									$ 33.6	[8]	$ 0	[8]	$ 0	[8]	$ 0	[8]	$ 0	[9]	$ 33.6	[8],[9]	$ 0	[9]
[1]	Changes in estimates on projects accounted for under the percentage of completion method favorably impacted income by approximately $20 in fiscal year 2016, primarily during the fourth quarter. For additional information, see Note 1, Major Accounting Policies (Revenue Recognition).
[2]	For additional information, see Note 3, Materials Technologies Separation.
[3]	For additional information, see Note 5, Business Restructuring and Cost Reduction Actions.
[4]	For additional information, see Note 16, Retirement Benefits.
[5]	For additional information, see Note 6, Business Combination.
[6]	For additional information, see Note 15, Debt.
[7]	Includes income tax expense for tax costs associated with business separation. For additional information, see Note 3, Materials Technologies Separation.
[8]	The gain is reflected on the consolidated income statements in “Other income (expense), net.” For additional information, see Note 24, Supplemental Information.
[9]	Reflected on the consolidated income statements in "Other income (expense), net."

Business Segment and Geograp160

Business Segment and Geographic Information (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Export sales to third-party customers									$ 307.7	$ 398.8	$ 378.7
Sales	$ 2,463	$ 2,434.4	$ 2,271.2	$ 2,355.8	$ 2,449.4	$ 2,470.2	$ 2,414.5	$ 2,560.8	9,524.4	9,894.9	10,439
Industrial Gases - Global [Member]
Segment Reporting Information [Line Items]
Sales									498.8	286.8	296
Industrial Gases - Global [Member] | Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Sales									$ 232.4	$ 242.8	$ 192.4

Business Segment and Geograp161

Business Segment and Geographic Information (Schedule of Segment Reporting Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Sales	$ 2,463	$ 2,434.4	$ 2,271.2	$ 2,355.8	$ 2,449.4	$ 2,470.2	$ 2,414.5	$ 2,560.8	$ 9,524.4	$ 9,894.9	$ 10,439
Operating income (loss)	547	$ 535.1	$ 513.3	$ 510.6	474.3	$ 424.8	$ 376.9	$ 432.3	2,106	1,708.3	1,339.1
Depreciation and amortization									925.9	936.4	956.9
Equity affiliates' income									148.6	154.5	151.4
Expenditures for long-lived assets									1,055.8	1,265.6	1,362.7
Investment in net assets of and advances to equity affiliates	1,288.1				1,265.7				1,288.1	1,265.7
Total assets	18,055.3				17,334.5				18,055.3	17,334.5	17,668.3
Segment Total [Member]
Segment Reporting Information [Line Items]
Sales									9,524.4	9,894.9	10,439
Operating income (loss)									2,198.5	1,893.2	1,667.4
Depreciation and amortization									925.9	936.4	956.9
Equity affiliates' income									148.6	154.5	151.4
Expenditures for long-lived assets									1,055.8	1,265.6	1,362.7
Investment in net assets of and advances to equity affiliates	1,288.1				1,265.7				1,288.1	1,265.7	1,257.9
Total assets	18,035.9				16,440.9				18,035.9	16,440.9	17,076.9
Industrial Gases - Americas [Member]
Segment Reporting Information [Line Items]
Sales									3,343.6	3,693.9	4,078.5
Operating income (loss)									895.2	808.4	762.6
Depreciation and amortization									442.5	416.9	414.4
Equity affiliates' income									52.7	64.6	60.9
Expenditures for long-lived assets									406.6	414.5	484.2
Investment in net assets of and advances to equity affiliates	250.6				249.7				250.6	249.7	234.3
Total assets	5,889.2				5,774.9				5,889.2	5,774.9	6,240.7
Industrial Gases - EMEA [Member]
Segment Reporting Information [Line Items]
Sales									1,700.3	1,864.9	2,150.7
Operating income (loss)									382.8	330.7	351.2
Depreciation and amortization									185.7	194.3	220.2
Equity affiliates' income									36.5	42.4	44.1
Expenditures for long-lived assets									159.5	215.6	239.1
Investment in net assets of and advances to equity affiliates	580.5				564.1				580.5	564.1	552.9
Total assets	3,178.6				3,323.9				3,178.6	3,323.9	3,521
Industrial Gases - Asia [Member]
Segment Reporting Information [Line Items]
Sales									1,716.1	1,637.5	1,527
Operating income (loss)									449.1	380.5	310.4
Depreciation and amortization									197.1	202.9	205.3
Equity affiliates' income									57.8	46.1	38
Expenditures for long-lived assets									313.3	402.5	430.3
Investment in net assets of and advances to equity affiliates	442.5				421.7				442.5	421.7	434.1
Total assets	4,232.7				4,154				4,232.7	4,154	4,045.6
Industrial Gases - Global [Member]
Segment Reporting Information [Line Items]
Sales									498.8	286.8	296
Operating income (loss)									(21.3)	(51.6)	(57.3)
Depreciation and amortization									7.9	16.5	7.1
Equity affiliates' income									(0.1)	(0.8)	5.8
Expenditures for long-lived assets									6	94.8	77.7
Investment in net assets of and advances to equity affiliates	10				14.3				10	14.3	18.8
Total assets	367.6				370.5				367.6	370.5	389.4
Materials Technologies [Member]
Segment Reporting Information [Line Items]
Sales									2,019.5	2,087.1	2,064.6
Operating income (loss)									530.2	476.7	379
Depreciation and amortization									77.4	92.8	99.1
Equity affiliates' income									1.7	2.2	2.6
Expenditures for long-lived assets									147.9	102.5	64.2
Investment in net assets of and advances to equity affiliates	4.5				15.9				4.5	15.9	17.8
Total assets	1,787				1,741.9				1,787	1,741.9	1,835.7
Corporate and other [Member]
Segment Reporting Information [Line Items]
Sales									246.1	324.7	322.2
Operating income (loss)									(37.5)	(51.5)	(78.5)
Depreciation and amortization									15.3	13	10.8
Equity affiliates' income									0	0	0
Expenditures for long-lived assets									22.5	35.7	67.2
Investment in net assets of and advances to equity affiliates	0				0				0	0	0
Total assets	$ 2,580.8				$ 1,075.7				$ 2,580.8	$ 1,075.7	$ 1,044.5

Business Segment and Geograp162

Business Segment and Geographic Information (Reconciliation of Operating Income) (Details) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Segment Reporting Information [Line Items]
Business separation costs	$ (23.3)	[1]	$ (9.5)	[1]	$ (7.4)	[1]	$ (12)	[1]	$ (7.5)	[1]	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ (52.2)	[1]	$ (7.5)	[1]	$ 0
Business restructuring and cost reduction actions	(11.1)	[2]	(14.2)	[2]	(8.6)	[2]	0	[2]	(61.7)	[2]	(58.2)	[2]	(55.4)	[2]	(32.4)	[2]	(33.9)	[2]	(207.7)	[2]	(12.7)
Pension settlement loss	(2.8)	[3]	(1)	[3]	(2.6)	[3]	0	[3]	(7)	[3]	(1.6)	[3]	(12.6)	[3]	0	[3]	(6.4)	[3]	(21.2)	[3]	(5.5)
Goodwill and intangible asset impairment charge																	0		0		(310.1)
Gain on previously held equity interest									0	[4]	0	[4]	0	[4]	17.9	[4]	0		17.9		0
Gain on land sales																	10.1		37.1		12.5
Operating Income	$ 547		$ 535.1		$ 513.3		$ 510.6		474.3		424.8		376.9		432.3		2,106		1,708.3		1,339.1
Segment Total [Member]
Segment Reporting Information [Line Items]
Operating Income																	2,198.5		1,893.2		1,667.4
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Business separation costs																	(52.2)		(7.5)		0
Business restructuring and cost reduction actions																	(33.9)		(207.7)		(12.7)
Pension settlement loss																	(6.4)		(21.2)		(5.5)
Goodwill and intangible asset impairment charge																	0		0		(310.1)
Gain on previously held equity interest																	0		17.9		0
Gain on land sales									$ 33.6	[5]	$ 0	[5]	$ 0	[5]	$ 0	[5]	$ 0	[6]	$ 33.6	[5],[6]	$ 0	[6]
[1]	For additional information, see Note 3, Materials Technologies Separation.
[2]	For additional information, see Note 5, Business Restructuring and Cost Reduction Actions.
[3]	For additional information, see Note 16, Retirement Benefits.
[4]	For additional information, see Note 6, Business Combination.
[5]	The gain is reflected on the consolidated income statements in “Other income (expense), net.” For additional information, see Note 24, Supplemental Information.
[6]	Reflected on the consolidated income statements in "Other income (expense), net."

Business Segment Information (R

Business Segment Information (Reconciliation of Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Total Assets	$ 18,055.3	$ 17,334.5	$ 17,668.3
Segment Total [Member]
Segment Reporting Information [Line Items]
Total Assets	18,035.9	16,440.9	17,076.9
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Assets of discontinued operations	$ 19.4	$ 893.6	$ 591.4

Business Segment and Geograp164

Business Segment and Geographic Information (Schedule of Geographic Information) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Revenue from External Customers and Long-Lived Assets [Line Items]
Sales to External Customers		$ 2,463	$ 2,434.4	$ 2,271.2	$ 2,355.8	$ 2,449.4	$ 2,470.2	$ 2,414.5	$ 2,560.8	$ 9,524.4	$ 9,894.9	$ 10,439
Long-Lived Assets	[1]	8,852.7				8,745.1				8,852.7	8,745.1	8,941.6
United States
Revenue from External Customers and Long-Lived Assets [Line Items]
Sales to External Customers										3,792.3	4,280.1	4,507.6
Long-Lived Assets	[1]	3,780.2				3,788.5				3,780.2	3,788.5	3,754.2
Canada
Revenue from External Customers and Long-Lived Assets [Line Items]
Sales to External Customers										225.7	247.1	311.4
Long-Lived Assets	[1]	639				577.4				639	577.4	518
Europe, excluding United Kingdom [Member]
Revenue from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	[1]	0				0				0	0	0
United Kingdom
Revenue from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	[1]	0				0				0	0	0
Europe [Member]
Revenue from External Customers and Long-Lived Assets [Line Items]
Sales to External Customers										2,505.9	2,315.4	2,628
Asia, excluding China [Member]
Revenue from External Customers and Long-Lived Assets [Line Items]
Sales to External Customers										1,382.7	1,395.2	1,389.4
Long-Lived Assets	[1]	1,056.5				914.2				1,056.5	914.2	989.9
China
Revenue from External Customers and Long-Lived Assets [Line Items]
Sales to External Customers										1,176.2	1,129.1	981
Long-Lived Assets	[1]	1,721.9				1,732.7				1,721.9	1,732.7	1,582.7
Latin America [Member]
Revenue from External Customers and Long-Lived Assets [Line Items]
Sales to External Customers										441.6	528	621.6
Long-Lived Assets	[1]	$ 349				$ 337.3				$ 349	$ 337.3	$ 440.1
[1]	Long-lived assets include plant and equipment, net.

Schedule II - Valuation And Qua

Schedule II - Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2016		Sep. 30, 2015	Sep. 30, 2014
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 49		$ 60	$ 102
Charged to Expense		9		8	8
Charged to Other Accounts		14		18	8
Other	[1]	(15)		(37)	(58)
Balance at End of Period		57		49	60
Allowance for deferred tax assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		104		104	45
Charged to Expense		1		0	58	[2]
Charged to Other Accounts		51	[3]	2	1
Other	[1]	(1)		(2)	0
Balance at End of Period		$ 155		$ 104	$ 104
[1]	Primarily includes write-offs of uncollectible trade receivables. Other Changes also includes the impact of foreign currency translation adjustments.
[2]	The increase in the valuation allowance was primarily due to the capital loss generated from the tax election related to a non-U.S. subsidiary.
[3]	The increase in the valuation allowance was primarily due to the loss recorded on the exit from the Energy-from-Waste business. These costs were recorded in discontinued operations. See Note 4, Discontinued Operations, for additional information.