Rockwell Automation (ROK) 10-Q 5 May 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Mar. 31, 2017shares
Document and Entity Information [Abstract]
Entity Registrant Name	ROCKWELL AUTOMATION INC.
Entity Central Index Key	1,024,478
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	128,835,404

Condensed Consolidated Balance

Condensed Consolidated Balance Sheet (Unaudited) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Current assets:
Cash and cash equivalents	$ 1,440.8	$ 1,526.4
Short-term investments	1,092.7	902.8
Receivables	1,082.6	1,079
Inventories	543.2	526.6
Other current assets	158.1	150.2
Total current assets	4,317.4	4,185
Property, net of accumulated depreciation of $1,443.2 and $1,404.5, respectively	567.2	578.3
Goodwill	1,063.3	1,073.9
Other intangible assets, net	239.2	255.3
Deferred income taxes	634	633.9
Other assets	243.9	374.8
Total	7,065	7,101.2
Current liabilities:
Short-term Debt	373.4	448.6
Current portion of long-term debt	250	0
Accounts payable	564.6	543.1
Compensation and benefits	196	145.6
Advance payments from customers and deferred revenue	247.1	214.5
Customer returns, rebates and incentives	179.4	176.5
Other current liabilities	214.9	447.6
Total current liabilities	2,025.4	1,975.9
Long-term debt	1,240	1,516.3
Retirement benefits	1,402.6	1,430.2
Other liabilities	199.2	188.7
Commitments and contingent liabilities (Note 11)
Shareowners' equity:
Common stock ($1.00 par value, shares issued: 181.4)	181.4	181.4
Additional paid-in capital	1,615.4	1,588.2
Retained earnings	5,877.1	5,668.4
Accumulated other comprehensive loss	(1,508)	(1,538.8)
Common stock in treasury, at cost (shares held: March 31, 2017, 52.6; September 30, 2016, 52.9)	(3,968.1)	(3,909.1)
Total shareowners' equity	2,197.8	1,990.1
Total	$ 7,065	$ 7,101.2

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Statement of Financial Position [Abstract]
Accumulated depreciation	$ 1,443.2	$ 1,404.5
Common stock, par value per share	$ 1	$ 1
Common stock, shares issued	181.4	181.4
Treasury stock, shares	52.6	52.9

Condensed Consolidated Statemen

Condensed Consolidated Statement of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Sales
Products and solutions	$ 1,384.4	$ 1,283	$ 2,714.6	$ 2,554.3
Services	169.9	157.3	330	312.6
Total sales	1,554.3	1,440.3	3,044.6	2,866.9
Cost of sales
Products and solutions	(787.2)	(738.3)	(1,534.3)	(1,446.9)
Services	(110.6)	(107.9)	(211.5)	(213.2)
Total cost of sales	(897.8)	(846.2)	(1,745.8)	(1,660.1)
Gross profit	656.5	594.1	1,298.8	1,206.8
Selling, general and administrative expenses	(409.2)	(358.7)	(779.2)	(718.6)
Other income (expense)	1.9	(0.8)	5.9	0.7
Interest expense	(18.9)	(17.6)	(37.6)	(35)
Income before income taxes	230.3	217	487.9	453.9
Income tax provision	(40.8)	(49)	(83.7)	(100.4)
Net income	$ 189.5	$ 168	$ 404.2	$ 353.5
Basic earnings per share:
Basic	$ 1.47	$ 1.29	$ 3.14	$ 2.69
Diluted earnings per share:
Diluted	1.45	1.28	3.11	2.68
Cash dividends per share	$ 0.76	$ 0.725	$ 1.52	$ 1.45
Weighted average outstanding shares:
Basic	128.7	130.5	128.5	131.2
Diluted	130.3	131.3	130	132

Condensed Consolidated Stateme5

Condensed Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Comprehensive income
Net income	$ 189.5	$ 168	$ 404.2	$ 353.5
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan adjustments (net of tax expense of $12.4, $9.8, $25.0, $19.6)	23.8	18.4	48.3	36.8
Currency translation adjustments	60.8	7.4	(25.4)	(17)
Net change in unrealized gains and losses on cash flow hedges (net of tax (benefit) expense of ($0.7), ($4.3), $3.3, and ($4.1))	(3.6)	(12.5)	8	(10.9)
Net change in unrealized gains and losses on available-for-sale investments	(0.1)	0	(0.1)	0
Other comprehensive income (loss)	80.9	13.3	30.8	8.9
Comprehensive income	$ 270.4	$ 181.3	$ 435	$ 362.4

Condensed Consolidated Stateme6

Condensed Consolidated Statement of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Other Comprehensive Income (Loss), Tax, Parenthetical Disclosures [Abstract]
Tax expense from pension and other postretirement benefit plan adjustments	$ 12.4	$ 9.8	$ 25	$ 19.6
Tax expense from net change in unrealized gains and losses on cash flow hedges	$ (0.7)	$ (4.3)	$ 3.3	$ (4.1)

Condensed Consolidated Stateme7

Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities:
Net income	$ 404.2	$ 353.5
Adjustments to arrive at cash provided by operating activities:
Depreciation	65.4	71.7
Amortization of intangible assets	15.6	14.7
Share-based compensation expense	20.2	20.6
Retirement benefit expense	86.1	78.2
Pension contributions	(28.5)	(21.2)
Net loss on disposition of property	0.1	0.5
Excess income tax benefit from share-based compensation	0	(1.2)
Changes in assets and liabilities, excluding effects of acquisitions and foreign currency adjustments:
Receivables	(16.4)	13.5
Inventories	(16.6)	(33.8)
Accounts payable	20	3.3
Advance payments from customers and deferred revenue	33.2	26.5
Compensation and benefits	51.2	(73.7)
Income taxes	(7.7)	(58)
Other assets and liabilities	(15)	4.7
Cash provided by operating activities	611.8	399.3
Investing activities:
Capital expenditures	(67.4)	(52.6)
Acquisition of businesses, net of cash acquired	(1.1)	(21.1)
Purchases of investments	721.6	590.6
Proceeds from maturities of investments	422.1	397.6
Proceeds from sale of investments	6.1	0
Proceeds from sale of property	0.4	0.2
Cash used for investing activities	(361.5)	(266.5)
Financing activities:
Net (repayment) issuance of short-term debt	(75.1)	277.6
Cash dividends	(195.5)	(190.4)
Purchases of treasury stock	(185)	(257.4)
Proceeds from the exercise of stock options	136.9	12.8
Excess income tax benefit from share-based compensation	0	1.2
Cash used for financing activities	(318.7)	(156.2)
Effect of exchange rate changes on cash	(17.2)	(7.6)
Decrease in cash and cash equivalents	(85.6)	(31)
Cash and cash equivalents at beginning of period	1,526.4	1,427.3
Cash and cash equivalents at end of period	$ 1,440.8	$ 1,396.3

Basis of Presentation and Accou

Basis of Presentation and Accounting Policies	6 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation and Accounting Policies	Basis of Presentation and Accounting Policies In the opinion of management of Rockwell Automation, Inc. ("Rockwell Automation" or "the Company"), the unaudited Condensed Consolidated Financial Statements contain all adjustments necessary to present fairly the financial position, results of operations and cash flows for the periods presented and, except as otherwise indicated, such adjustments consist only of those of a normal, recurring nature. These statements should be read in conjunction with our Annual Report on Form 10-K for the fiscal year ended September 30, 2016 . The results of operations for the three and six -month periods ended March 31, 2017 , are not necessarily indicative of the results for the full year. All date references to years and quarters herein refer to our fiscal year and fiscal quarter unless otherwise stated. Cash and Cash Equivalents Cash and cash equivalents include time deposits, certificates of deposit, and other fixed income securities with original maturities of three months or less at the time of purchase. Short-term Investments Short-term investments include time deposits, certificates of deposit and other fixed income securities with original maturities longer than three months at the time of purchase and less than one year from period end. All investments meeting the definition of a security are accounted for as available-for-sale and stated at fair value. All other investments are stated at cost, which approximates fair value. Receivables Receivables are stated net of an allowance for doubtful accounts of $24.4 million at March 31, 2017 , and $24.5 million at September 30, 2016 . In addition, receivables are stated net of an allowance for certain customer returns, rebates and incentives of $10.8 million at March 31, 2017 , and $7.9 million at September 30, 2016 . Earnings Per Share The following table reconciles basic and diluted earnings per share (EPS) amounts (in millions, except per share amounts): Three Months Ended Six Months Ended 2017 2016 2017 2016 Net income $ 189.5 $ 168.0 $ 404.2 $ 353.5 Less: Allocation to participating securities (0.2 ) (0.2 ) (0.4 ) (0.4 ) Net income available to common shareowners $ 189.3 $ 167.8 $ 403.8 $ 353.1 Basic weighted average outstanding shares 128.7 130.5 128.5 131.2 Effect of dilutive securities Stock options 1.3 0.8 1.3 0.8 Performance shares 0.3 — 0.2 — Diluted weighted average outstanding shares 130.3 131.3 130.0 132.0 Earnings per share: Basic $ 1.47 $ 1.29 $ 3.14 $ 2.69 Diluted $ 1.45 $ 1.28 $ 3.11 $ 2.68 For each of the three and six months ended March 31, 2017 , share-based compensation awards for 1.0 million shares were excluded from the diluted EPS calculation because they were antidilutive. For each of the three and six months ended March 31, 2016 , share-based compensation awards for 2.9 million shares were excluded from the diluted EPS calculation because they were antidilutive. Non-Cash Investing and Financing Activities Capital expenditures of $17.6 million and $13.8 million were accrued within accounts payable and other current liabilities at March 31, 2017 and 2016 , respectively. At March 31, 2017 and 2016 , there were $7.0 million and $3.4 million , respectively, of outstanding common stock share repurchases recorded in accounts payable that did not settle until the next fiscal quarter. These non-cash investing and financing activities have been excluded from cash used for capital expenditures and treasury stock purchases in the Condensed Consolidated Statement of Cash Flows. Recent Accounting Pronouncements In March 2016, the Financial Accounting Standards Board (FASB) issued a new standard on share-based compensation. This requirement is effective for us no later than October 1, 2017; however, we elected to adopt earlier as of October 1, 2016. This standard requires entities to record the excess income tax benefit or deficiency from share-based compensation within the income tax provision rather than within additional paid-in capital. This change reduced our income tax provision by $16.8 million and $20.2 million in the three and six months ended March 31, 2017 , respectively. The standard also requires this benefit or deficiency to be classified as an operating cash flow rather than as a financing cash flow. The requirement to record the benefit or deficiency within the income tax provision is effective on a prospective basis. We have elected to adopt the cash flow presentation requirement on a prospective basis. Our adoption of all other requirements under the new standard had no material impact on our financial statements. In February 2016, the FASB issued a new standard on accounting for leases that requires lessees to recognize right-of-use assets and lease liabilities for most leases, among other changes to existing lease accounting guidance. The new standard also requires additional qualitative and quantitative disclosures about leasing activities. This standard is effective for us for reporting periods beginning October 1, 2019. We are currently evaluating the impact the adoption of this standard will have on our consolidated financial statements and related disclosures. In May 2014, the FASB issued a new standard on revenue recognition related to contracts with customers. This standard supersedes nearly all existing revenue recognition guidance and involves a five-step principles-based approach to recognizing revenue. The underlying principle is to recognize revenue when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. The new standard will also require additional qualitative and quantitative disclosures about contracts with customers, significant judgments made in applying the revenue guidance, and assets recognized from the costs to obtain or fulfill a contract. We will adopt this new standard in the first quarter of fiscal 2019 and have established a project plan and a cross-functional implementation team to adopt the new standard. We are in the process of identifying necessary changes to accounting policies, processes, controls and systems to enable compliance with this new standard. We continue to evaluate the impact the adoption of this standard will have on our consolidated financial statements and related disclosures.

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Share-Based Compensation We recognized $9.5 million and $20.2 million of pre-tax share-based compensation expense during the three and six months ended March 31, 2017 , respectively. We recognized $9.8 million and $20.6 million of pre-tax share-based compensation expense during the three and six months ended March 31, 2016 , respectively. Our annual grant of share-based compensation takes place during the first quarter of each fiscal year. The number of shares granted to employees and non-employee directors and the weighted average fair value per share during the periods presented were (in thousands, except per share amounts): Six Months Ended March 31, 2017 2016 Grants Wtd. Avg. Share Fair Value Grants Wtd. Avg. Share Fair Value Stock options 983 $ 25.39 1,134 $ 21.19 Performance shares 42 174.37 96 87.64 Restricted stock and restricted stock units 46 135.84 57 103.67 Unrestricted stock 8 128.35 9 97.73

Inventories

Inventories	6 Months Ended
	Mar. 31, 2017
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consist of (in millions): March 31, September 30, Finished goods $ 215.1 $ 215.8 Work in process 172.6 158.0 Raw materials 155.5 152.8 Inventories $ 543.2 $ 526.6

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Changes in the carrying amount of goodwill for the six months ended March 31, 2017 , are (in millions): Architecture & Software Control Products & Solutions Total Balance as of September 30, 2016 $ 414.5 $ 659.4 $ 1,073.9 Acquisition of business — 0.5 0.5 Translation (2.4 ) (8.7 ) (11.1 ) Balance as of March 31, 2017 $ 412.1 $ 651.2 $ 1,063.3 Other intangible assets consist of (in millions): March 31, 2017 Carrying Amount Accumulated Amortization Net Amortized intangible assets: Computer software products $ 182.4 $ 108.2 $ 74.2 Customer relationships 111.3 55.0 56.3 Technology 103.2 52.4 50.8 Trademarks 30.8 18.3 12.5 Other 10.6 8.9 1.7 Total amortized intangible assets 438.3 242.8 195.5 Allen-Bradley ® trademark not subject to amortization 43.7 — 43.7 Total $ 482.0 $ 242.8 $ 239.2 September 30, 2016 Carrying Amount Accumulated Amortization Net Amortized intangible assets: Computer software products $ 182.4 $ 103.4 $ 79.0 Customer relationships 112.6 51.9 60.7 Technology 103.9 48.5 55.4 Trademarks 31.4 17.0 14.4 Other 11.0 8.9 2.1 Total amortized intangible assets 441.3 229.7 211.6 Allen-Bradley ® trademark not subject to amortization 43.7 — 43.7 Total $ 485.0 $ 229.7 $ 255.3 Estimated amortization expense is $29.8 million in 2017 , $25.0 million in 2018 , $21.8 million in 2019 , $19.1 million in 2020 and $18.4 million in 2021 . We performed the annual evaluation of our goodwill and indefinite life intangible assets for impairment as required by accounting principles generally accepted in the United States (U.S. GAAP) during the second quarter of 2017 and concluded that these assets are not impaired.

Short-term Debt

Short-term Debt	6 Months Ended
	Mar. 31, 2017
Short-term Debt [Abstract]
Short-term Debt	Short-term Debt Our short-term debt obligations primarily consist of commercial paper borrowings. Commercial paper borrowings outstanding were $373.0 million and $448.6 million at March 31, 2017 , and September 30, 2016 , respectively. The weighted average interest rate of the commercial paper outstanding was 1.04 percent and 0.57 percent at March 31, 2017 , and September 30, 2016 , respectively. The current portion of long-term debt consists of our $250.0 million 5.65% notes due in December 2017. These notes were included within long-term debt at September 30, 2016 , but are included within current liabilities at March 31, 2017 , as they are due within the next twelve months. At March 31, 2017 , and September 30, 2016 , our total borrowing capacity under our unsecured revolving credit facility expiring in March 2020 was $1.0 billion . We did not borrow against this credit facility during the three months ended March 31, 2017 , or the twelve months ended September 30, 2016 . In December 2016, we amended the financial covenant under this credit facility. The previous financial covenant, which limited our debt-to-total-capital ratio to 60 percent , was replaced with a minimum EBITDA-to-interest ratio of 3.0 to 1.0. The EBITDA-to-interest ratio is defined in the amendment as the ratio of consolidated EBITDA (as defined in the amendment) for the preceding four quarters to consolidated interest expense for the same period.

Other Current Liabilities

Other Current Liabilities	6 Months Ended
	Mar. 31, 2017
Other Liabilities Disclosure [Abstract]
Other Current Liabilities	Other Current Liabilities Other current liabilities consist of (in millions): March 31, September 30, Unrealized losses on foreign exchange contracts $ 16.1 $ 15.6 Product warranty obligations 26.6 28.0 Taxes other than income taxes 44.0 43.1 Accrued interest 16.9 16.9 Income taxes payable 49.6 28.6 Rocky Flats settlement (Note 14) — 242.5 Other 61.7 72.9 Other current liabilities $ 214.9 $ 447.6

Product Warranty Obligations

Product Warranty Obligations	6 Months Ended
	Mar. 31, 2017
Product Warranties Disclosures [Abstract]
Product Warranty Obligations	Product Warranty Obligations We record a liability for product warranty obligations at the time of sale to a customer based upon historical warranty experience. Most of our products are covered under a warranty period that runs for twelve months from either the date of sale or installation. We also record a liability for specific warranty matters when they become probable and reasonably estimable. Changes in product warranty obligations for the six months ended March 31, 2017 and 2016 are (in millions): Six Months Ended 2017 2016 Balance at beginning of period $ 28.0 $ 27.9 Accruals for warranties issued during the current period 12.5 12.6 Adjustments to pre-existing warranties (1.7 ) 0.1 Settlements of warranty claims (12.2 ) (12.5 ) Balance at end of period $ 26.6 $ 28.1

Investments

Investments	6 Months Ended
	Mar. 31, 2017
Investments [Abstract]
Investments	8 . Investments We invest in certificates of deposit, time deposits, commercial paper and other fixed income securities. All investments meeting the U.S. GAAP definition of a security were classified as available-for-sale as of March 31, 2017, and September 30, 2016. Unrealized gains and losses on available-for-sale investments are included in our Condensed Consolidated Balance Sheet as a component of accumulated other comprehensive income, net of any deferred taxes. Realized gains and losses are included in net income. Our investments consist of (in millions): March 31, September 30, Certificates of deposit and time deposits $ 999.4 $ 902.8 Commercial paper 14.2 — Corporate debt securities 76.3 — Government securities 114.2 — Total $ 1,204.1 $ 902.8 Pre-tax gross unrealized gains and losses on available-for-sale investments were not material at March 31, 2017. Pre-tax gross realized gains and losses on available-for-sale investments were not material for the three and six months ended March 31, 2017 and 2016. At March 31, 2017, there were $12.4 million of outstanding purchases of investments recorded in accounts payable that did not settle until April 2017. We evaluated all investments for which the fair value was less than amortized cost for impairment on an individual security basis at March 31, 2017. This assessment included consideration of our intent and ability to hold the security and the credit risks specific to each security. We determined that the declines in fair value of these investments were not other than temporary as of March 31, 2017, and accordingly we did not recognize any impairment charges in net income. The table below summarizes the contractual maturities of our investments as of March 31, 2017 (in millions). Actual maturities may differ from the contractual maturities below as borrowers may have the right to prepay certain obligations. Fair Value Less than one year $ 1,092.7 Due in one to three years 111.4 Total $ 1,204.1 Classification of our investments as current or noncurrent is based on the nature of the investment and when the investment is reasonably expected to be realized. These investments were included in the following line items within the Condensed Consolidated Balance Sheet (in millions): March 31, September 30, Short-term investments $ 1,092.7 $ 902.8 Other assets 111.4 — Total $ 1,204.1 $ 902.8 8 . Investments (continued) Fair Value of Investments U.S. GAAP defines fair value as the price that would be received for an asset or paid to transfer a liability (exit price) in an orderly transaction between market participants in the principal or most advantageous market for the asset or liability. U.S. GAAP also classifies the inputs used to measure fair value into the following hierarchy: Level 1: Quoted prices in active markets for identical assets or liabilities. Level 2: Quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability. Level 3: Unobservable inputs for the asset or liability. We recognize all available-for-sale investments at fair value in the Condensed Consolidated Balance Sheet. The valuation methodologies used for our investments measured at fair value are described as follows. Certificates of deposit and time deposits — These investments are stated at cost, which approximates fair value. Commercial paper — These investments are stated at amortized cost, which approximates fair value. Government securities — Valued at the most recent closing price on the active market on which the individual securities are traded or, absent an active market, utilizing observable inputs such as closing prices in less frequently traded markets. Corporate debt securities — Valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that maximizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks. The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while we believe our valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. We did not hold any Level 3 investments or have any transfers between levels of fair value measurements during the periods presented. Fair values of our investments were (in millions): March 31, 2017 Level 1 Level 2 Level 3 Total Certificates of deposit and time deposits $ — $ 999.4 $ — $ 999.4 Commercial paper — 14.2 — 14.2 Corporate debt securities — 76.3 — 76.3 Government securities 96.8 17.4 — 114.2 Total $ 96.8 $ 1,107.3 $ — $ 1,204.1 September 30, 2016 Level 1 Level 2 Level 3 Total Certificates of deposit and time deposits $ — $ 902.8 $ — $ 902.8 Commercial paper — — — — Corporate debt securities — — — — Government securities — — — — Total $ — $ 902.8 $ — $ 902.8

Retirement Benefits

Retirement Benefits	6 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Retirement Benefits	Retirement Benefits The components of net periodic benefit cost (income) are (in millions): Pension Benefits Three Months Ended Six Months Ended 2017 2016 2017 2016 Service cost $ 24.2 $ 21.8 $ 48.3 $ 43.9 Interest cost 37.8 42.2 75.6 84.7 Expected return on plan assets (56.2 ) (54.4 ) (112.4 ) (109.1 ) Amortization: Prior service credit (1.1 ) (0.7 ) (1.9 ) (1.4 ) Net actuarial loss 38.2 31.1 76.2 62.2 Settlements — — 0.2 — Net periodic benefit cost $ 42.9 $ 40.0 $ 86.0 $ 80.3 Other Postretirement Benefits Three Months Ended Six Months Ended 2017 2016 2017 2016 Service cost $ 0.4 $ 0.3 $ 0.7 $ 0.6 Interest cost 0.7 0.9 1.3 1.7 Amortization: Prior service credit (1.5 ) (2.9 ) (3.0 ) (5.7 ) Net actuarial loss 0.6 0.7 1.1 1.3 Net periodic benefit cost (income) $ 0.2 $ (1.0 ) $ 0.1 $ (2.1 )

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	6 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Changes in accumulated other comprehensive loss by component for the three and six months ended March 31, 2017 , were (in millions): Three Months Ended March 31, 2017 Pension and other postretirement benefit plan adjustments, net of tax Accumulated currency translation adjustments, net of tax Net unrealized gains (losses) on cash flow hedges, net of tax Net unrealized gains (losses) on available-for-sale investments, net of tax Total accumulated other comprehensive loss, net of tax Balance as of December 31, 2016 $ (1,215.3 ) $ (381.1 ) $ 7.5 $ — $ (1,588.9 ) Other comprehensive income (loss) before reclassifications — 60.8 (2.3 ) (0.1 ) 58.4 Amounts reclassified from accumulated other comprehensive loss 23.8 — (1.3 ) — 22.5 Other comprehensive income (loss) 23.8 60.8 (3.6 ) (0.1 ) 80.9 Balance as of March 31, 2017 $ (1,191.5 ) $ (320.3 ) $ 3.9 $ (0.1 ) $ (1,508.0 ) Six Months Ended March 31, 2017 Pension and other postretirement benefit plan adjustments, net of tax Accumulated currency translation adjustments, net of tax Net unrealized gains (losses) on cash flow hedges, net of tax Net unrealized gains (losses) on available-for-sale investments, net of tax Total accumulated other comprehensive loss, net of tax Balance as of September 30, 2016 $ (1,239.8 ) $ (294.9 ) $ (4.1 ) $ — $ (1,538.8 ) Other comprehensive income (loss) before reclassifications 0.7 (25.4 ) 9.5 (0.1 ) (15.3 ) Amounts reclassified from accumulated other comprehensive loss 47.6 — (1.5 ) — 46.1 Other comprehensive income (loss) 48.3 (25.4 ) 8.0 (0.1 ) 30.8 Balance as of March 31, 2017 $ (1,191.5 ) $ (320.3 ) $ 3.9 $ (0.1 ) $ (1,508.0 ) 10 . Accumulated Other Comprehensive Loss (continued) Changes in accumulated other comprehensive loss by component for the three and six months ended March 31, 2016 , were (in millions): Three Months Ended March 31, 2016 Pension and other postretirement benefit plan adjustments, net of tax Accumulated currency translation adjustments, net of tax Net unrealized gains (losses) on cash flow hedges, net of tax Net unrealized gains (losses) on available-for-sale investments, net of tax Total accumulated other comprehensive loss, net of tax Balance as of December 31, 2015 $ (1,078.7 ) $ (276.8 ) $ 16.5 $ — $ (1,339.0 ) Other comprehensive income (loss) before reclassifications — 7.4 (5.8 ) — 1.6 Amounts reclassified from accumulated other comprehensive loss 18.4 — (6.7 ) — 11.7 Other comprehensive income (loss) 18.4 7.4 (12.5 ) — 13.3 Balance as of March 31, 2016 $ (1,060.3 ) $ (269.4 ) $ 4.0 $ — $ (1,325.7 ) Six Months Ended March 31, 2016 Pension and other postretirement benefit plan adjustments, net of tax Accumulated currency translation adjustments, net of tax Net unrealized gains (losses) on cash flow hedges, net of tax Net unrealized gains (losses) on available-for-sale investments, net of tax Total accumulated other comprehensive loss, net of tax Balance as of September 30, 2015 $ (1,097.1 ) $ (252.4 ) $ 14.9 $ — $ (1,334.6 ) Other comprehensive (loss) income before reclassifications — (17.0 ) 0.7 — (16.3 ) Amounts reclassified from accumulated other comprehensive loss 36.8 — (11.6 ) — 25.2 Other comprehensive income (loss) 36.8 (17.0 ) (10.9 ) — 8.9 Balance as of March 31, 2016 $ (1,060.3 ) $ (269.4 ) $ 4.0 $ — $ (1,325.7 ) 10 . Accumulated Other Comprehensive Loss (continued) The reclassifications out of accumulated other comprehensive loss to the Condensed Consolidated Statement of Operations were (in millions): Three Months Ended Six Months Ended Affected Line in the Condensed Consolidated Statement of Operations 2017 2016 2017 2016 Pension and other postretirement benefit plan adjustments: Amortization of prior service credit $ (2.6 ) $ (3.6 ) $ (4.9 ) $ (7.1 ) (a) Amortization of net actuarial loss 38.8 31.8 77.3 63.5 (a) Settlements — — 0.2 — (a) 36.2 28.2 72.6 56.4 Income before income taxes (12.4 ) (9.8 ) (25.0 ) (19.6 ) Income tax provision $ 23.8 $ 18.4 $ 47.6 $ 36.8 Net income Net unrealized losses (gains) on cash flow hedges: Forward exchange contracts $ 1.0 $ 1.6 $ 1.5 $ 4.1 Sales Forward exchange contracts (2.6 ) (10.2 ) (3.6 ) (19.0 ) Cost of sales Forward exchange contracts 0.3 — 0.6 — Selling, general and administrative expenses (1.3 ) (8.6 ) (1.5 ) (14.9 ) Income before income taxes — 1.9 — 3.3 Income tax provision $ (1.3 ) $ (6.7 ) $ (1.5 ) $ (11.6 ) Net income Total reclassifications $ 22.5 $ 11.7 $ 46.1 $ 25.2 Net income (a) Reclassified from accumulated other comprehensive loss into cost of sales and selling, general and administrative expenses. These components are included in the computation of net periodic benefit cost (income). See Note 9 for further information.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	6 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Commitments and Contingent Liabilities Various lawsuits, claims and proceedings have been or may be instituted or asserted against us relating to the conduct of our business, including those pertaining to product liability, environmental, safety and health, intellectual property, employment and contract matters. Although the outcome of litigation cannot be predicted with certainty and some lawsuits, claims or proceedings may be disposed of unfavorably to us, we believe the disposition of matters that are pending or have been asserted will not have a material effect on our business, financial condition or results of operations. We (including our subsidiaries) have been named as a defendant in lawsuits alleging personal injury as a result of exposure to asbestos that was used in certain components of our products many years ago. Currently there are a few thousand claimants in lawsuits that name us as defendants, together with hundreds of other companies. In some cases, the claims involve products from divested businesses, and we are indemnified for most of the costs. However, we have agreed to defend and indemnify asbestos claims associated with products manufactured or sold by our former Dodge mechanical and Reliance Electric motors and motor repair services businesses prior to their divestiture by us, which occurred on January 31, 2007. We are also responsible for half of the costs and liabilities associated with asbestos cases against the former Rockwell International Corporation’s divested measurement and flow control business. But in all cases, for those claimants who do show that they worked with our products or products of divested businesses for which we are responsible, we nevertheless believe we have meritorious defenses, in substantial part due to the integrity of the products, the encapsulated nature of any asbestos-containing components, and the lack of any impairing medical condition on the part of many claimants. We defend those cases vigorously. Historically, we have been dismissed from the vast majority of these claims with no payment to claimants. We have maintained insurance coverage that we believe covers indemnity and defense costs, over and above self-insured retentions, for claims arising from our former Allen-Bradley subsidiary. Our insurance carrier entered into a cost share agreement with us to pay the substantial majority of future defense and indemnity costs for Allen-Bradley asbestos claims. We believe that this arrangement will continue to provide coverage for Allen-Bradley asbestos claims throughout the remaining life of the asbestos liability. We also have rights to historic insurance policies that provide indemnity and defense costs, over and above self-insured retentions, for claims arising out of certain asbestos liabilities relating to the divested measurement and flow control business. We initiated litigation against several insurers to pursue coverage for these claims, subject to each carrier's policy limits, and the case is now pending in Los Angeles County Superior Court. In September 2016, we entered into settlement agreements with certain insurance company defendants, and we continue to pursue our claims against the remaining defendants. We believe these settlement agreements will continue to provide partial coverage for these asbestos claims throughout the remaining life of asbestos liability. The uncertainties of asbestos claim litigation make it difficult to predict accurately the ultimate outcome of asbestos claims. That uncertainty is increased by the possibility of adverse rulings or new legislation affecting asbestos claim litigation or the settlement process. Subject to these uncertainties and based on our experience defending asbestos claims, we do not believe these lawsuits will have a material effect on our business, financial condition or results of operations. We have, from time to time, divested certain of our businesses. In connection with these divestitures, certain lawsuits, claims and proceedings may be instituted or asserted against us related to the period that we owned the businesses, either because we agreed to retain certain liabilities related to these periods or because such liabilities fall upon us by operation of law. In some instances, the divested business has assumed the liabilities; however, it is possible that we might be responsible for satisfying those liabilities if the divested business is unable to do so. In connection with the spin-offs of our former automotive business, semiconductor systems business and avionics and communications business, the spun-off companies have agreed to indemnify us for substantially all contingent liabilities related to the respective businesses, including environmental and intellectual property matters. In conjunction with the sale of our Dodge mechanical and Reliance Electric motors and motor repair services businesses, we agreed to indemnify Baldor Electric Company for costs and damages related to certain legal, legacy environmental and asbestos matters of these businesses arising before January 31, 2007, for which the maximum exposure would be capped at the amount received for the sale. 11 . Commitments and Contingent Liabilities (continued) In many countries we provide a limited intellectual property indemnity as part of our terms and conditions of sale. We also at times provide limited intellectual property indemnities in other contracts with third parties, such as contracts concerning the development and manufacture of our products. As of March 31, 2017 , we were not aware of any material indemnification claims where an unfavorable outcome was probable or reasonably possible. Historically, claims that have been made under the indemnification agreements have not had a material impact on our business, financial condition or results of operations; however, to the extent that valid indemnification claims arise in the future, future payments by us could be significant and could have a material adverse effect on our business, financial condition or results of operations in a particular period.

Income Taxes

Income Taxes	6 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes At the end of each interim period, we estimate a base effective tax rate that we expect for the full fiscal year based on our most recent forecast of pre-tax income, permanent book and tax differences and global tax planning strategies. We use this base rate to provide for income taxes on a year-to-date basis, excluding the effect of significant unusual items and items that are reported net of their related tax effects in the period in which they occur. The effective tax rate was 17.7 percent and 17.2 percent in the three and six months ended March 31, 2017 , respectively, compared to 22.6 percent and 22.1 percent in the three and six months ended March 31, 2016 . The effective tax rate was lower than the U.S. statutory rate of 35 percent in each period primarily because we benefited from lower non-U.S. tax rates. In the three and six months ended March 31, 2017 , we also realized benefits from discrete tax items. In the three months ended March 31, 2016 , we also realized a benefit from a discrete tax item. In the six months ended March 31, 2016 , our effective tax rate was favorably impacted by this discrete tax item and the retroactive and permanent extension of the U.S. federal research and development tax credit during the first quarter of 2016. The amount of gross unrecognized tax benefits was $41.6 million and $32.4 million at March 31, 2017 , and September 30, 2016 , respectively, of which the entire amount would reduce our effective tax rate if recognized. Accrued interest and penalties related to unrecognized tax benefits were $5.7 million and $5.2 million at March 31, 2017 , and September 30, 2016 , respectively. We recognize interest and penalties related to unrecognized tax benefits in the income tax provision. We believe it is reasonably possible that the amount of gross unrecognized tax benefits could be reduced by up to $20.1 million in the next 12 months as a result of the resolution of tax matters in various global jurisdictions and the lapses of statutes of limitations. If all of the unrecognized tax benefits were recognized, the net reduction to our income tax provision, including the recognition of interest and penalties and offsetting tax assets, could be up to $5.8 million . We conduct business globally and are routinely audited by the various tax jurisdictions in which we operate. We are no longer subject to U.S. federal income tax examinations for years before 2014 and are no longer subject to state, local and foreign income tax examinations for years before 2003 .

Business Segment Information

Business Segment Information	6 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Business Segment Information	Business Segment Information The following tables reflect the sales and operating results of our reportable segments (in millions): Three Months Ended Six Months Ended 2017 2016 2017 2016 Sales Architecture & Software $ 719.0 $ 629.5 $ 1,415.4 $ 1,272.4 Control Products & Solutions 835.3 810.8 1,629.2 1,594.5 Total $ 1,554.3 $ 1,440.3 $ 3,044.6 $ 2,866.9 Segment operating earnings Architecture & Software $ 190.6 $ 154.6 $ 399.2 $ 330.8 Control Products & Solutions 105.4 122.9 213.4 242.6 Total 296.0 277.5 612.6 573.4 Purchase accounting depreciation and amortization (5.6 ) (4.5 ) (11.2 ) (9.2 ) General corporate – net (21.4 ) (19.5 ) (36.3 ) (37.5 ) Non-operating pension costs (19.8 ) (18.9 ) (39.6 ) (37.8 ) Interest expense (18.9 ) (17.6 ) (37.6 ) (35.0 ) Income before income taxes $ 230.3 $ 217.0 $ 487.9 $ 453.9 Among other considerations, we evaluate performance and allocate resources based upon segment operating earnings before income taxes, interest expense, costs related to corporate offices, non-operating pension costs, certain nonrecurring corporate initiatives, gains and losses from the disposition of businesses and purchase accounting depreciation and amortization. Depending on the product, intersegment sales within a single legal entity are either at cost or cost plus a mark-up, which does not necessarily represent a market price. Sales between legal entities are at an appropriate transfer price. We allocate costs related to shared segment operating activities to the segments using a methodology consistent with the expected benefit.

Rocky Flats Settlement

Rocky Flats Settlement	6 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Legal Matters and Contingencies	Rocky Flats Settlement From 1975 to 1989, Rockwell International Corporation (RIC) operated the Rocky Flats facility in Colorado for the U.S. Department of Energy (DoE). In 1990, a class of landowners near Rocky Flats sued RIC and Dow Chemical, another former operator of the facility. In May 2016, the parties agreed to settle this case and the DoE authorized the settlement. Under the court approved settlement agreement, we and Dow Chemical agreed to pay $375.0 million in the aggregate to resolve the claims. Under RIC’s contract with the DoE and federal law, RIC was entitled to indemnification by the DoE for its portion of the settlement amount, which was $243.75 million . When RIC was acquired by Boeing in 1996, we agreed to indemnify Boeing for RIC’s liabilities related to Rocky Flats and received the benefits of RIC’s corresponding indemnity rights against the DoE. Pursuant to the settlement agreement, in fiscal 2016, RIC paid an initial amount of $1.25 million to the plaintiff class escrow fund. In January 2017, the DoE fulfilled its indemnification obligation by paying $243.75 million , and the full amount of RIC's obligation under the settlement agreement has now been transferred to the plaintiff class escrow account. As a result, we were not required to make any payment under the settlement agreement.

Basis of Presentation and Acc22

Basis of Presentation and Accounting Policies (Policies)	6 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Receivables	Receivables Receivables are stated net of an allowance for doubtful accounts of $24.4 million at March 31, 2017 , and $24.5 million at September 30, 2016 . In addition, receivables are stated net of an allowance for certain customer returns, rebates and incentives of $10.8 million at March 31, 2017 , and $7.9 million at September 30, 2016 .
Recent accounting pronouncements	Recent Accounting Pronouncements In March 2016, the Financial Accounting Standards Board (FASB) issued a new standard on share-based compensation. This requirement is effective for us no later than October 1, 2017; however, we elected to adopt earlier as of October 1, 2016. This standard requires entities to record the excess income tax benefit or deficiency from share-based compensation within the income tax provision rather than within additional paid-in capital. This change reduced our income tax provision by $16.8 million and $20.2 million in the three and six months ended March 31, 2017 , respectively. The standard also requires this benefit or deficiency to be classified as an operating cash flow rather than as a financing cash flow. The requirement to record the benefit or deficiency within the income tax provision is effective on a prospective basis. We have elected to adopt the cash flow presentation requirement on a prospective basis. Our adoption of all other requirements under the new standard had no material impact on our financial statements. In February 2016, the FASB issued a new standard on accounting for leases that requires lessees to recognize right-of-use assets and lease liabilities for most leases, among other changes to existing lease accounting guidance. The new standard also requires additional qualitative and quantitative disclosures about leasing activities. This standard is effective for us for reporting periods beginning October 1, 2019. We are currently evaluating the impact the adoption of this standard will have on our consolidated financial statements and related disclosures. In May 2014, the FASB issued a new standard on revenue recognition related to contracts with customers. This standard supersedes nearly all existing revenue recognition guidance and involves a five-step principles-based approach to recognizing revenue. The underlying principle is to recognize revenue when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. The new standard will also require additional qualitative and quantitative disclosures about contracts with customers, significant judgments made in applying the revenue guidance, and assets recognized from the costs to obtain or fulfill a contract. We will adopt this new standard in the first quarter of fiscal 2019 and have established a project plan and a cross-functional implementation team to adopt the new standard. We are in the process of identifying necessary changes to accounting policies, processes, controls and systems to enable compliance with this new standard. We continue to evaluate the impact the adoption of this standard will have on our consolidated financial statements and related disclosures.
Product warranty obligations	We record a liability for product warranty obligations at the time of sale to a customer based upon historical warranty experience. Most of our products are covered under a warranty period that runs for twelve months from either the date of sale or installation. We also record a liability for specific warranty matters when they become probable and reasonably estimable.
Investments	We invest in certificates of deposit, time deposits, commercial paper and other fixed income securities. All investments meeting the U.S. GAAP definition of a security were classified as available-for-sale as of March 31, 2017, and September 30, 2016. Unrealized gains and losses on available-for-sale investments are included in our Condensed Consolidated Balance Sheet as a component of accumulated other comprehensive income, net of any deferred taxes. Realized gains and losses are included in net income.
Fair Value of Financial Instruments	Fair Value of Investments U.S. GAAP defines fair value as the price that would be received for an asset or paid to transfer a liability (exit price) in an orderly transaction between market participants in the principal or most advantageous market for the asset or liability. U.S. GAAP also classifies the inputs used to measure fair value into the following hierarchy: Level 1: Quoted prices in active markets for identical assets or liabilities. Level 2: Quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability. Level 3: Unobservable inputs for the asset or liability. We recognize all available-for-sale investments at fair value in the Condensed Consolidated Balance Sheet. The valuation methodologies used for our investments measured at fair value are described as follows. Certificates of deposit and time deposits — These investments are stated at cost, which approximates fair value. Commercial paper — These investments are stated at amortized cost, which approximates fair value. Government securities — Valued at the most recent closing price on the active market on which the individual securities are traded or, absent an active market, utilizing observable inputs such as closing prices in less frequently traded markets. Corporate debt securities — Valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that maximizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks. The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while we believe our valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. We did not hold any Level 3 investments or have any transfers between levels of fair value measurements during the periods presented.
Income taxes	At the end of each interim period, we estimate a base effective tax rate that we expect for the full fiscal year based on our most recent forecast of pre-tax income, permanent book and tax differences and global tax planning strategies. We use this base rate to provide for income taxes on a year-to-date basis, excluding the effect of significant unusual items and items that are reported net of their related tax effects in the period in which they occur.

Basis of Presentation and Acc23

Basis of Presentation and Accounting Policies (Tables)	6 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table reconciles basic and diluted earnings per share (EPS) amounts (in millions, except per share amounts): Three Months Ended Six Months Ended 2017 2016 2017 2016 Net income $ 189.5 $ 168.0 $ 404.2 $ 353.5 Less: Allocation to participating securities (0.2 ) (0.2 ) (0.4 ) (0.4 ) Net income available to common shareowners $ 189.3 $ 167.8 $ 403.8 $ 353.1 Basic weighted average outstanding shares 128.7 130.5 128.5 131.2 Effect of dilutive securities Stock options 1.3 0.8 1.3 0.8 Performance shares 0.3 — 0.2 — Diluted weighted average outstanding shares 130.3 131.3 130.0 132.0 Earnings per share: Basic $ 1.47 $ 1.29 $ 3.14 $ 2.69 Diluted $ 1.45 $ 1.28 $ 3.11 $ 2.68

Share-Based Compensation (Table

Share-Based Compensation (Tables)	6 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation, Activity	The number of shares granted to employees and non-employee directors and the weighted average fair value per share during the periods presented were (in thousands, except per share amounts): Six Months Ended March 31, 2017 2016 Grants Wtd. Avg. Share Fair Value Grants Wtd. Avg. Share Fair Value Stock options 983 $ 25.39 1,134 $ 21.19 Performance shares 42 174.37 96 87.64 Restricted stock and restricted stock units 46 135.84 57 103.67 Unrestricted stock 8 128.35 9 97.73

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Mar. 31, 2017
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	Inventories consist of (in millions): March 31, September 30, Finished goods $ 215.1 $ 215.8 Work in process 172.6 158.0 Raw materials 155.5 152.8 Inventories $ 543.2 $ 526.6

Goodwill and Other Intangible26

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Changes in the carrying amount of goodwill for the six months ended March 31, 2017 , are (in millions): Architecture & Software Control Products & Solutions Total Balance as of September 30, 2016 $ 414.5 $ 659.4 $ 1,073.9 Acquisition of business — 0.5 0.5 Translation (2.4 ) (8.7 ) (11.1 ) Balance as of March 31, 2017 $ 412.1 $ 651.2 $ 1,063.3
Schedule of Finite Lived and Indefinite Lived Intangible Assets by Major Class	Other intangible assets consist of (in millions): March 31, 2017 Carrying Amount Accumulated Amortization Net Amortized intangible assets: Computer software products $ 182.4 $ 108.2 $ 74.2 Customer relationships 111.3 55.0 56.3 Technology 103.2 52.4 50.8 Trademarks 30.8 18.3 12.5 Other 10.6 8.9 1.7 Total amortized intangible assets 438.3 242.8 195.5 Allen-Bradley ® trademark not subject to amortization 43.7 — 43.7 Total $ 482.0 $ 242.8 $ 239.2 September 30, 2016 Carrying Amount Accumulated Amortization Net Amortized intangible assets: Computer software products $ 182.4 $ 103.4 $ 79.0 Customer relationships 112.6 51.9 60.7 Technology 103.9 48.5 55.4 Trademarks 31.4 17.0 14.4 Other 11.0 8.9 2.1 Total amortized intangible assets 441.3 229.7 211.6 Allen-Bradley ® trademark not subject to amortization 43.7 — 43.7 Total $ 485.0 $ 229.7 $ 255.3

Other Current Liabilities (Tabl

Other Current Liabilities (Tables)	6 Months Ended
	Mar. 31, 2017
Other Liabilities Disclosure [Abstract]
Other Current Liabilities	Other current liabilities consist of (in millions): March 31, September 30, Unrealized losses on foreign exchange contracts $ 16.1 $ 15.6 Product warranty obligations 26.6 28.0 Taxes other than income taxes 44.0 43.1 Accrued interest 16.9 16.9 Income taxes payable 49.6 28.6 Rocky Flats settlement (Note 14) — 242.5 Other 61.7 72.9 Other current liabilities $ 214.9 $ 447.6

Product Warranty Obligations (T

Product Warranty Obligations (Tables)	6 Months Ended
	Mar. 31, 2017
Product Warranties Disclosures [Abstract]
Schedule of Product Warranty Liability	Changes in product warranty obligations for the six months ended March 31, 2017 and 2016 are (in millions): Six Months Ended 2017 2016 Balance at beginning of period $ 28.0 $ 27.9 Accruals for warranties issued during the current period 12.5 12.6 Adjustments to pre-existing warranties (1.7 ) 0.1 Settlements of warranty claims (12.2 ) (12.5 ) Balance at end of period $ 26.6 $ 28.1

Investments (Tables)

Investments (Tables)	6 Months Ended
	Mar. 31, 2017
Investments [Abstract]
Investment	Our investments consist of (in millions): March 31, September 30, Certificates of deposit and time deposits $ 999.4 $ 902.8 Commercial paper 14.2 — Corporate debt securities 76.3 — Government securities 114.2 — Total $ 1,204.1 $ 902.8
Investments Classified by Contractual Maturity Date	The table below summarizes the contractual maturities of our investments as of March 31, 2017 (in millions). Actual maturities may differ from the contractual maturities below as borrowers may have the right to prepay certain obligations. Fair Value Less than one year $ 1,092.7 Due in one to three years 111.4 Total $ 1,204.1
Fair Value, by Balance Sheet Grouping	Classification of our investments as current or noncurrent is based on the nature of the investment and when the investment is reasonably expected to be realized. These investments were included in the following line items within the Condensed Consolidated Balance Sheet (in millions): March 31, September 30, Short-term investments $ 1,092.7 $ 902.8 Other assets 111.4 — Total $ 1,204.1 $ 902.8
Fair Value Measurements, Recurring and Nonrecurring	Fair values of our investments were (in millions): March 31, 2017 Level 1 Level 2 Level 3 Total Certificates of deposit and time deposits $ — $ 999.4 $ — $ 999.4 Commercial paper — 14.2 — 14.2 Corporate debt securities — 76.3 — 76.3 Government securities 96.8 17.4 — 114.2 Total $ 96.8 $ 1,107.3 $ — $ 1,204.1 September 30, 2016 Level 1 Level 2 Level 3 Total Certificates of deposit and time deposits $ — $ 902.8 $ — $ 902.8 Commercial paper — — — — Corporate debt securities — — — — Government securities — — — — Total $ — $ 902.8 $ — $ 902.8

Retirement Benefits (Tables)

Retirement Benefits (Tables)	6 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Schedule of Net Benefit Costs	The components of net periodic benefit cost (income) are (in millions): Pension Benefits Three Months Ended Six Months Ended 2017 2016 2017 2016 Service cost $ 24.2 $ 21.8 $ 48.3 $ 43.9 Interest cost 37.8 42.2 75.6 84.7 Expected return on plan assets (56.2 ) (54.4 ) (112.4 ) (109.1 ) Amortization: Prior service credit (1.1 ) (0.7 ) (1.9 ) (1.4 ) Net actuarial loss 38.2 31.1 76.2 62.2 Settlements — — 0.2 — Net periodic benefit cost $ 42.9 $ 40.0 $ 86.0 $ 80.3 Other Postretirement Benefits Three Months Ended Six Months Ended 2017 2016 2017 2016 Service cost $ 0.4 $ 0.3 $ 0.7 $ 0.6 Interest cost 0.7 0.9 1.3 1.7 Amortization: Prior service credit (1.5 ) (2.9 ) (3.0 ) (5.7 ) Net actuarial loss 0.6 0.7 1.1 1.3 Net periodic benefit cost (income) $ 0.2 $ (1.0 ) $ 0.1 $ (2.1 )

Accumulated Other Comprehensi31

Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	Changes in accumulated other comprehensive loss by component for the three and six months ended March 31, 2017 , were (in millions): Three Months Ended March 31, 2017 Pension and other postretirement benefit plan adjustments, net of tax Accumulated currency translation adjustments, net of tax Net unrealized gains (losses) on cash flow hedges, net of tax Net unrealized gains (losses) on available-for-sale investments, net of tax Total accumulated other comprehensive loss, net of tax Balance as of December 31, 2016 $ (1,215.3 ) $ (381.1 ) $ 7.5 $ — $ (1,588.9 ) Other comprehensive income (loss) before reclassifications — 60.8 (2.3 ) (0.1 ) 58.4 Amounts reclassified from accumulated other comprehensive loss 23.8 — (1.3 ) — 22.5 Other comprehensive income (loss) 23.8 60.8 (3.6 ) (0.1 ) 80.9 Balance as of March 31, 2017 $ (1,191.5 ) $ (320.3 ) $ 3.9 $ (0.1 ) $ (1,508.0 ) Six Months Ended March 31, 2017 Pension and other postretirement benefit plan adjustments, net of tax Accumulated currency translation adjustments, net of tax Net unrealized gains (losses) on cash flow hedges, net of tax Net unrealized gains (losses) on available-for-sale investments, net of tax Total accumulated other comprehensive loss, net of tax Balance as of September 30, 2016 $ (1,239.8 ) $ (294.9 ) $ (4.1 ) $ — $ (1,538.8 ) Other comprehensive income (loss) before reclassifications 0.7 (25.4 ) 9.5 (0.1 ) (15.3 ) Amounts reclassified from accumulated other comprehensive loss 47.6 — (1.5 ) — 46.1 Other comprehensive income (loss) 48.3 (25.4 ) 8.0 (0.1 ) 30.8 Balance as of March 31, 2017 $ (1,191.5 ) $ (320.3 ) $ 3.9 $ (0.1 ) $ (1,508.0 ) 10 . Accumulated Other Comprehensive Loss (continued) Changes in accumulated other comprehensive loss by component for the three and six months ended March 31, 2016 , were (in millions): Three Months Ended March 31, 2016 Pension and other postretirement benefit plan adjustments, net of tax Accumulated currency translation adjustments, net of tax Net unrealized gains (losses) on cash flow hedges, net of tax Net unrealized gains (losses) on available-for-sale investments, net of tax Total accumulated other comprehensive loss, net of tax Balance as of December 31, 2015 $ (1,078.7 ) $ (276.8 ) $ 16.5 $ — $ (1,339.0 ) Other comprehensive income (loss) before reclassifications — 7.4 (5.8 ) — 1.6 Amounts reclassified from accumulated other comprehensive loss 18.4 — (6.7 ) — 11.7 Other comprehensive income (loss) 18.4 7.4 (12.5 ) — 13.3 Balance as of March 31, 2016 $ (1,060.3 ) $ (269.4 ) $ 4.0 $ — $ (1,325.7 ) Six Months Ended March 31, 2016 Pension and other postretirement benefit plan adjustments, net of tax Accumulated currency translation adjustments, net of tax Net unrealized gains (losses) on cash flow hedges, net of tax Net unrealized gains (losses) on available-for-sale investments, net of tax Total accumulated other comprehensive loss, net of tax Balance as of September 30, 2015 $ (1,097.1 ) $ (252.4 ) $ 14.9 $ — $ (1,334.6 ) Other comprehensive (loss) income before reclassifications — (17.0 ) 0.7 — (16.3 ) Amounts reclassified from accumulated other comprehensive loss 36.8 — (11.6 ) — 25.2 Other comprehensive income (loss) 36.8 (17.0 ) (10.9 ) — 8.9 Balance as of March 31, 2016 $ (1,060.3 ) $ (269.4 ) $ 4.0 $ — $ (1,325.7 )
Reclassification out of Accumulated Other Comprehensive Income	The reclassifications out of accumulated other comprehensive loss to the Condensed Consolidated Statement of Operations were (in millions): Three Months Ended Six Months Ended Affected Line in the Condensed Consolidated Statement of Operations 2017 2016 2017 2016 Pension and other postretirement benefit plan adjustments: Amortization of prior service credit $ (2.6 ) $ (3.6 ) $ (4.9 ) $ (7.1 ) (a) Amortization of net actuarial loss 38.8 31.8 77.3 63.5 (a) Settlements — — 0.2 — (a) 36.2 28.2 72.6 56.4 Income before income taxes (12.4 ) (9.8 ) (25.0 ) (19.6 ) Income tax provision $ 23.8 $ 18.4 $ 47.6 $ 36.8 Net income Net unrealized losses (gains) on cash flow hedges: Forward exchange contracts $ 1.0 $ 1.6 $ 1.5 $ 4.1 Sales Forward exchange contracts (2.6 ) (10.2 ) (3.6 ) (19.0 ) Cost of sales Forward exchange contracts 0.3 — 0.6 — Selling, general and administrative expenses (1.3 ) (8.6 ) (1.5 ) (14.9 ) Income before income taxes — 1.9 — 3.3 Income tax provision $ (1.3 ) $ (6.7 ) $ (1.5 ) $ (11.6 ) Net income Total reclassifications $ 22.5 $ 11.7 $ 46.1 $ 25.2 Net income (a) Reclassified from accumulated other comprehensive loss into cost of sales and selling, general and administrative expenses. These components are included in the computation of net periodic benefit cost (income). See Note 9 for further information.

Business Segment Information (T

Business Segment Information (Tables)	6 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following tables reflect the sales and operating results of our reportable segments (in millions): Three Months Ended Six Months Ended 2017 2016 2017 2016 Sales Architecture & Software $ 719.0 $ 629.5 $ 1,415.4 $ 1,272.4 Control Products & Solutions 835.3 810.8 1,629.2 1,594.5 Total $ 1,554.3 $ 1,440.3 $ 3,044.6 $ 2,866.9 Segment operating earnings Architecture & Software $ 190.6 $ 154.6 $ 399.2 $ 330.8 Control Products & Solutions 105.4 122.9 213.4 242.6 Total 296.0 277.5 612.6 573.4 Purchase accounting depreciation and amortization (5.6 ) (4.5 ) (11.2 ) (9.2 ) General corporate – net (21.4 ) (19.5 ) (36.3 ) (37.5 ) Non-operating pension costs (19.8 ) (18.9 ) (39.6 ) (37.8 ) Interest expense (18.9 ) (17.6 ) (37.6 ) (35.0 ) Income before income taxes $ 230.3 $ 217.0 $ 487.9 $ 453.9

Basis of Presentation and Acc33

Basis of Presentation and Accounting Policies (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Reconciled Basic and Diluted EPS
Net income	$ 189.5	$ 168	$ 404.2	$ 353.5
Less: Allocation to participating securities	(0.2)	(0.2)	(0.4)	(0.4)
Net income available to common shareowners	$ 189.3	$ 167.8	$ 403.8	$ 353.1
Basic weighted average outstanding shares	128.7	130.5	128.5	131.2
Effect of dilutive securities
Stock options	1.3	0.8	1.3	0.8
Performance shares	0.3	0	0.2	0
Diluted weighted average outstanding shares	130.3	131.3	130	132
Basic earnings per share:
Basic	$ 1.47	$ 1.29	$ 3.14	$ 2.69
Diluted earnings per share:
Diluted	$ 1.45	$ 1.28	$ 3.11	$ 2.68

Basis of Presentation and Acc34

Basis of Presentation and Accounting Policies (Details Textual) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Sep. 30, 2016
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 24.4		$ 24.4		$ 24.5
Allowance for certain customer returns, rebates and incentives	$ 10.8		$ 10.8		$ 7.9
Antidilutive share-based compensation awards	1	2.9	1	2.9
Capital expenditures in accounts payable or other current liabilities at period end			$ 17.6	$ 13.8
Outstanding purchase of common stock recorded in accounts payable			7	$ 3.4
Reduction in income tax provision from early adoption of new share-based compensation standard	$ 16.8		$ 20.2

Share-Based Compensation (Detai

Share-Based Compensation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Share-Based Compensation (Textual) [Abstract]
Pre-tax share-based compensation expense	$ 9.5	$ 9.8	$ 20.2	$ 20.6
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants			983	1,134
Wtd. Avg. Share Fair Value			$ 25.39	$ 21.19
Performance shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants			42	96
Wtd. Avg. Share Fair Value			$ 174.37	$ 87.64
Restricted stock and restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants			46	57
Wtd. Avg. Share Fair Value			$ 135.84	$ 103.67
Unrestricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants			8	9
Wtd. Avg. Share Fair Value			$ 128.35	$ 97.73

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Inventories
Finished goods	$ 215.1	$ 215.8
Work in process	172.6	158
Raw materials	155.5	152.8
Inventories	$ 543.2	$ 526.6

Goodwill and Other Intangible37

Goodwill and Other Intangible Assets (Details) $ in Millions	6 Months Ended
	Mar. 31, 2017USD ($)
Goodwill
Balance as of September 30, 2016	$ 1,073.9
Acquisition of business	0.5
Translation	(11.1)
Balance as of March 31, 2017	1,063.3
Architecture & Software [Member]
Goodwill
Balance as of September 30, 2016	414.5
Acquisition of business	0
Translation	(2.4)
Balance as of March 31, 2017	412.1
Control Products & Solutions [Member]
Goodwill
Balance as of September 30, 2016	659.4
Acquisition of business	0.5
Translation	(8.7)
Balance as of March 31, 2017	$ 651.2

Goodwill and Other Intangible38

Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Total, carrying amount	$ 482	$ 485
Total, net	239.2	255.3
Other intangible assets
Amortized intangible assets, carrying amount	438.3	441.3
Amortized intangible assets, accumulated amortization	242.8	229.7
Amortized intangible assets, net	195.5	211.6
Goodwill and Other Intangible Assets (Textual) [Abstract]
Estimated amortization expense in 2017	29.8
Estimated amortization expense in 2018	25
Estimated amortization expense in 2019	21.8
Estimated amortization expense in 2020	19.1
Estimated amortization expense in 2021	18.4
Trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
Allen-Bradley® trademark not subject to amortization	43.7	43.7
Computer software products [Member]
Other intangible assets
Amortized intangible assets, carrying amount	182.4	182.4
Amortized intangible assets, accumulated amortization	108.2	103.4
Amortized intangible assets, net	74.2	79
Customer relationships [Member]
Other intangible assets
Amortized intangible assets, carrying amount	111.3	112.6
Amortized intangible assets, accumulated amortization	55	51.9
Amortized intangible assets, net	56.3	60.7
Technology [Member]
Other intangible assets
Amortized intangible assets, carrying amount	103.2	103.9
Amortized intangible assets, accumulated amortization	52.4	48.5
Amortized intangible assets, net	50.8	55.4
Trademarks [Member]
Other intangible assets
Amortized intangible assets, carrying amount	30.8	31.4
Amortized intangible assets, accumulated amortization	18.3	17
Amortized intangible assets, net	12.5	14.4
Other [Member]
Other intangible assets
Amortized intangible assets, carrying amount	10.6	11
Amortized intangible assets, accumulated amortization	8.9	8.9
Amortized intangible assets, net	$ 1.7	$ 2.1

Short-term Debt (Details)

Short-term Debt (Details) $ in Millions	6 Months Ended
	Mar. 31, 2017USD ($)	Sep. 30, 2016USD ($)
Short-term Debt [Abstract]
Commercial paper borrowings outstanding	$ 373	$ 448.6
Weighted average interest rate of commercial paper outstanding	1.04%	0.57%
Current portion of long-term debt	$ 250	$ 0
Line of Credit [Member]
Line of Credit Facility [Line Items]
Borrowing capacity	$ 1,000
Maximum [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Maximum debt to total capital ratio required by debt covenants		0.60
Maximum ratio of EBITDA to interest expense under credit facility	3

Other Current Liabilities (Deta

Other Current Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015
Other current liabilities
Unrealized losses on foreign exchange contracts	$ 16.1	$ 15.6
Product warranty obligations	26.6	28	$ 28.1	$ 27.9
Taxes other than income taxes	44	43.1
Accrued interest	16.9	16.9
Income taxes payable	49.6	28.6
Rocky Flats settlement (Note 14)	0	242.5
Other	61.7	72.9
Other current liabilities	$ 214.9	$ 447.6

Product Warranty Obligations (D

Product Warranty Obligations (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Changes in product warranty obligations
Balance at beginning of period	$ 28	$ 27.9
Accruals for warranties issued during the current period	12.5	12.6
Adjustments to pre-existing warranties	(1.7)	0.1
Settlements of warranty claims	(12.2)	(12.5)
Balance at end of period	$ 26.6	$ 28.1

Investments (Details)

Investments (Details) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Investment [Line Items]
Total	$ 1,204.1	$ 902.8
Purchases of investments, amount outstanding	12.4
Certificates of deposit and time deposits [Member]
Investment [Line Items]
Total	999.4	902.8
Commercial paper [Member]
Investment [Line Items]
Total	14.2	0
Corporate debt securities [Member]
Investment [Line Items]
Total	76.3	0
Government securities [Member]
Investment [Line Items]
Total	$ 114.2	$ 0

Investments (Details 1)

Investments (Details 1) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Investments [Abstract]
Less than one year	$ 1,092.7
Due in one to three years	111.4
Total	$ 1,204.1	$ 902.8

Investments (Details 2)

Investments (Details 2) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total	$ 1,204.1	$ 902.8
Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total	1,092.7	902.8
Other Assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total	$ 111.4	$ 0

Investments (Details 3)

Investments (Details 3) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 1,204.1	$ 902.8
Certificates of deposit and time deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	999.4	902.8
Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	14.2	0
Corporate debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	76.3	0
Government securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	114.2	0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	96.8	0
Fair Value, Inputs, Level 1 [Member] | Certificates of deposit and time deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Fair Value, Inputs, Level 1 [Member] | Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Fair Value, Inputs, Level 1 [Member] | Corporate debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Fair Value, Inputs, Level 1 [Member] | Government securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	96.8	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,107.3	902.8
Fair Value, Inputs, Level 2 [Member] | Certificates of deposit and time deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	999.4	902.8
Fair Value, Inputs, Level 2 [Member] | Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	14.2	0
Fair Value, Inputs, Level 2 [Member] | Corporate debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	76.3	0
Fair Value, Inputs, Level 2 [Member] | Government securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	17.4	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Fair Value, Inputs, Level 3 [Member] | Certificates of deposit and time deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Fair Value, Inputs, Level 3 [Member] | Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Fair Value, Inputs, Level 3 [Member] | Corporate debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Fair Value, Inputs, Level 3 [Member] | Government securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 0	$ 0

Retirement Benefits (Details)

Retirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Pension Benefits [Member]
Components of net periodic benefit cost (income)
Service cost	$ 24.2	$ 21.8	$ 48.3	$ 43.9
Interest cost	37.8	42.2	75.6	84.7
Expected return on plan assets	(56.2)	(54.4)	(112.4)	(109.1)
Amortization:
Prior service credit	(1.1)	(0.7)	(1.9)	(1.4)
Net actuarial loss	38.2	31.1	76.2	62.2
Settlements	0	0	0.2	0
Net periodic benefit cost (income)	42.9	40	86	80.3
Other Postretirement Benefits [Member]
Components of net periodic benefit cost (income)
Service cost	0.4	0.3	0.7	0.6
Interest cost	0.7	0.9	1.3	1.7
Amortization:
Prior service credit	(1.5)	(2.9)	(3)	(5.7)
Net actuarial loss	0.6	0.7	1.1	1.3
Net periodic benefit cost (income)	$ 0.2	$ (1)	$ 0.1	$ (2.1)

Accumulated Other Comprehensi47

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ (1,588.9)	$ (1,339)	$ (1,538.8)	$ (1,334.6)
Other comprehensive (loss) income before reclassifications	58.4	1.6	(15.3)	(16.3)
Amounts reclassified from accumulated other comprehensive loss	22.5	11.7	46.1	25.2
Other comprehensive income (loss)	80.9	13.3	30.8	8.9
Balance at end of period	(1,508)	(1,325.7)	(1,508)	(1,325.7)
Pension and other postretirement benefit plan adjustments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(1,215.3)	(1,078.7)	(1,239.8)	(1,097.1)
Other comprehensive (loss) income before reclassifications	0	0	0.7	0
Amounts reclassified from accumulated other comprehensive loss	23.8	18.4	47.6	36.8
Other comprehensive income (loss)	23.8	18.4	48.3	36.8
Balance at end of period	(1,191.5)	(1,060.3)	(1,191.5)	(1,060.3)
Accumulated currency translation adjustments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(381.1)	(276.8)	(294.9)	(252.4)
Other comprehensive (loss) income before reclassifications	60.8	7.4	(25.4)	(17)
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Other comprehensive income (loss)	60.8	7.4	(25.4)	(17)
Balance at end of period	(320.3)	(269.4)	(320.3)	(269.4)
Net unrealized gains (losses) on cash flow hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	7.5	16.5	(4.1)	14.9
Other comprehensive (loss) income before reclassifications	(2.3)	(5.8)	9.5	0.7
Amounts reclassified from accumulated other comprehensive loss	(1.3)	(6.7)	(1.5)	(11.6)
Other comprehensive income (loss)	(3.6)	(12.5)	8	(10.9)
Balance at end of period	3.9	4	3.9	4
Net unrealized gains (losses) on available-for-sale investments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	0	0	0	0
Other comprehensive (loss) income before reclassifications	(0.1)	0	(0.1)	0
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Other comprehensive income (loss)	(0.1)	0	(0.1)	0
Balance at end of period	$ (0.1)	$ 0	$ (0.1)	$ 0

Accumulated Other Comprehensi48

Accumulated Other Comprehensive Loss (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	$ 230.3	$ 217	$ 487.9	$ 453.9
Income tax provision	(40.8)	(49)	(83.7)	(100.4)
Net income	189.5	168	404.2	353.5
Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	22.5	11.7	46.1	25.2
Pension and other postretirement benefit plan adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service credit	(2.6)	(3.6)	(4.9)	(7.1)
Amortization of net actuarial loss	38.8	31.8	77.3	63.5
Settlements	0	0	0.2	0
Pension and other postretirement benefit plan adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	36.2	28.2	72.6	56.4
Income tax provision	(12.4)	(9.8)	(25)	(19.6)
Net income	23.8	18.4	47.6	36.8
Net unrealized gains (losses) on cash flow hedges [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(1.3)	(8.6)	(1.5)	(14.9)
Income tax provision	0	1.9	0	3.3
Net income	(1.3)	(6.7)	(1.5)	(11.6)
Net unrealized gains (losses) on cash flow hedges [Member] | Foreign Exchange Forward [Member] | Sales [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive loss	1	1.6	1.5	4.1
Net unrealized gains (losses) on cash flow hedges [Member] | Foreign Exchange Forward [Member] | Cost of sales [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive loss	(2.6)	(10.2)	(3.6)	(19)
Net unrealized gains (losses) on cash flow hedges [Member] | Foreign Exchange Forward [Member] | Selling, General and Administrative Expenses [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive loss	$ 0.3	$ 0	$ 0.6	$ 0

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Effective income tax rate	17.70%	22.60%	17.20%	22.10%
U.S. statutory rate	35.00%	35.00%	35.00%	35.00%
Gross unrecognized tax benefits	$ 41.6		$ 41.6		$ 32.4
Accrued interest and penalties related to unrecognized tax benefits	5.7		5.7		$ 5.2
Reasonably possible amount of reduction in gross unrecognized tax benefits for the next twelve months	20.1		20.1
Reasonably possible amount of net reduction to income tax provision if unrecognized tax benefits were recognized	$ 5.8		$ 5.8
Earliest open year for income tax examinations, U.S. federal			2,014
Earliest open tax year for income tax examinations, state, local and non-U.S.			2,003

Business Segment Information (D

Business Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Sales and operating results of reportable segments
Sales	$ 1,554.3	$ 1,440.3	$ 3,044.6	$ 2,866.9
Income before income taxes	230.3	217	487.9	453.9
Interest expense	(18.9)	(17.6)	(37.6)	(35)
Operating Segments [Member]
Sales and operating results of reportable segments
Income before income taxes	296	277.5	612.6	573.4
Segment Reconciling Items [Member]
Sales and operating results of reportable segments
Purchase accounting depreciation and amortization	(5.6)	(4.5)	(11.2)	(9.2)
Non-operating pension costs	(19.8)	(18.9)	(39.6)	(37.8)
Corporate, Non-Segment [Member]
Sales and operating results of reportable segments
General corporate - net	(21.4)	(19.5)	(36.3)	(37.5)
Interest expense	(18.9)	(17.6)	(37.6)	(35)
Architecture & Software [Member]
Sales and operating results of reportable segments
Sales	719	629.5	1,415.4	1,272.4
Income before income taxes	190.6	154.6	399.2	330.8
Control Products & Solutions [Member]
Sales and operating results of reportable segments
Sales	835.3	810.8	1,629.2	1,594.5
Income before income taxes	$ 105.4	$ 122.9	$ 213.4	$ 242.6

Rocky Flats Settlement (Details

Rocky Flats Settlement (Details) - Rocky Flats [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2017	Sep. 30, 2016
Loss Contingencies [Line Items]
Settlement amount, in aggregate	$ 375,000
Settlement amount, total Rockwell obligation	243,750
Settlement amount, payments made to plaintiff class escrow fund	$ 243,750	$ 1,250