GCP Applied (GCP) 10-Q 9 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	May 02, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	GCP Applied Technologies Inc.
Entity Central Index Key	1,644,440
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		71,465,608
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1

Consolidated Statements of Oper

Consolidated Statements of Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net sales	$ 225.3	$ 237.7
Cost of goods sold	140	144.5
Gross profit	85.3	93.2
Selling, general and administrative expenses	72.8	63.4
Research and development expenses	4.8	4.1
Interest expense and related financing costs	17	12.5
Other income (expense), net	1	(0.1)
Total costs and expenses	98.7	85.1
(Loss) income from continuing operations before income taxes	(13.4)	8.1
Provision for income taxes	(11.6)	(1.7)
(Loss) income from continuing operations	(25)	6.4
Income from discontinued operations, net of income taxes	8.1	11.8
Net (loss) income	(16.9)	18.2
Less: Net income attributable to noncontrolling interests	0	(0.4)
Net (loss) income attributable to GCP shareholders	(16.9)	17.8
Amounts Attributable to GCP Shareholders:
(Loss) income from continuing operations attributable to GCP shareholders	(25)	6
Income from discontinued operations, net of income taxes	$ 8.1	$ 11.8
Basic earnings per share:
(Loss) income from continuing operations attributable to GCP shareholders (in usd per share)	$ (0.35)	$ 0.08
Income from discontinued operations, net of income taxes (in usd per share)	0.11	0.17
Net income (loss) attributable to GCP shareholders (in usd per share)	$ (0.24)	$ 0.25
Weighted average number of basic shares	71.2	70.6
Diluted earnings per share:
(Loss) income from continuing operations attributable to GCP shareholders (in usd per share)	$ (0.35)	$ 0.08
Income from discontinued operations, net of income taxes (in usd per share)	0.11	0.17
Net income (loss) attributable to GCP shareholders (in usd per share)	$ (0.24)	$ 0.25
Weighted average number of diluted shares	71.2	70.9
Repositioning
Restructuring expenses	$ 2	$ 4.3
Restructuring
Restructuring expenses	$ 1.1	$ 0.9

Consolidated Balance Sheets (un

Consolidated Balance Sheets (unaudited) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 109.5	$ 146.1
Trade accounts receivable, less allowance of $4.6 (2016—$4.5)	169.4	166.6
Inventories	101.3	89.3
Other current assets	53.1	42.9
Current assets held for sale	120.3	108.9
Total Current Assets	553.6	553.8
Properties and equipment, net	191.5	192.2
Goodwill	115.1	114.9
Technology and other intangible assets, net	51	52.6
Deferred income taxes	59	76.9
Overfunded defined benefit pension plans	22	21.2
Other assets	23.7	22.4
Noncurrent assets held for sale	61.8	55.8
Total Assets	1,077.7	1,089.8
Current Liabilities
Debt payable within one year	37.9	47.9
Accounts payable	104.7	95.4
Other current liabilities	96.9	119.5
Current liabilities held for sale	54.8	48.7
Total Current Liabilities	294.3	311.5
Debt payable after one year	782.7	783
Deferred income taxes	5.9	6.6
Unrecognized tax benefits	10.9	9.7
Underfunded and unfunded defined benefit pension plans	86.2	83.2
Other liabilities	13.8	13.9
Noncurrent liabilities held for sale	21.6	20.9
Total Liabilities	1,215.4	1,228.8
Commitments and Contingencies - Note 7
Stockholders' (Deficit) Equity
Common stock issued, par value $0.01; 300,000,000 shares authorized; outstanding: 71,450,751	0.7	0.7
Paid-in capital	17.2	11
Accumulated deficit	(21.6)	(4.7)
Accumulated other comprehensive loss	(135)	(147.6)
Treasury stock	(3)	(2.1)
Total GCP's Shareholders' (Deficit) Equity	(141.7)	(142.7)
Noncontrolling interests	4	3.7
Total Stockholders' (Deficit) Equity	(137.7)	(139)
Total Liabilities and Stockholders' (Deficit) Equity	$ 1,077.7	$ 1,089.8

Consolidated Balance Sheets (u4

Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Trade accounts receivable, allowance	$ 4.6	$ 4.5
Common stock issued, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, number of shares authorized	300,000,000	300,000,000
Common stock, number of shares outstanding	71,450,751	71,450,751

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (16.9)	$ 18.2
Other comprehensive income (loss):
Currency translation adjustments	12.6	3.9
Loss from hedging activities, net of income taxes	0	(0.2)
Total other comprehensive income attributable to noncontrolling interests	0	0.2
Total other comprehensive income	12.6	3.9
Comprehensive (loss) income	(4.3)	22.1
Less: Comprehensive income attributable to noncontrolling interests	0	(0.6)
Comprehensive (loss) income attributable to GCP shareholders	$ (4.3)	$ 21.5

Consolidated Statements of Equi

Consolidated Statements of Equity (Deficit) (unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit	Net Parent Investment	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning balance at Dec. 31, 2015	$ 474.1	$ 0	$ 0	$ 0	$ 0	$ 598.3	$ (127.7)	$ 3.5
Beginning balance, shares at Dec. 31, 2015		0	0
Increase (Decrease) in Stockholders' Equity
Net income	18.2				10.6	7.2		0.4
Net transfer to parent	(677.9)					(677.9)
Issuance of common stock and reclassification of net parent investment in connection with Separation, shares		70.5
Issuance of common stock and reclassification of net parent investment in connection with Separation	0	$ 0.7			(73.1)	72.4
Issuance of common stock in connection with stock plans, shares		0.1
Share-based compensation	0.7			0.7
Exercise of stock options, shares		0.2
Exercise of stock options	0.6			0.6
Treasury stock purchased under GCP 2016 Stock Incentive Plan, shares			0.1
Treasury stock purchased under GCP 2016 Stock Incentive Plan	(1.7)		$ (1.7)
Other comprehensive income	3.9						3.7	0.2
Ending balance at Mar. 31, 2016	(182.1)	$ 0.7	$ (1.7)	1.3	(62.5)	$ 0	(124)	4.1
Ending balance, shares at Mar. 31, 2016		70.8	0.1
Beginning balance at Dec. 31, 2016	(139)	$ 0.7	$ (2.1)	11	(4.7)		(147.6)	3.7
Beginning balance, shares at Dec. 31, 2016		71.2	0.1
Increase (Decrease) in Stockholders' Equity
Net income	(16.9)				(16.9)
Issuance of common stock in connection with stock plans, shares		0.1
Share-based compensation	2.1			2.1
Exercise of stock options, shares		0.3
Exercise of stock options	4.1			4.1
Treasury stock purchased under GCP 2016 Stock Incentive Plan	(0.9)		$ (0.9)
Other comprehensive income	12.6						12.6
Dividends and other changes in noncontrolling interest	0.3							0.3
Ending balance at Mar. 31, 2017	$ (137.7)	$ 0.7	$ (3)	$ 17.2	$ (21.6)		$ (135)	$ 4
Ending balance, shares at Mar. 31, 2017		71.6	0.1

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OPERATING ACTIVITIES
Net (loss) income	$ (16.9)	$ 18.2
Less: Income from discontinued operations	8.1	11.8
(Loss) income from continuing operations	(25)	6.4
Reconciliation to net cash (used in) provided by operating activities:
Depreciation and amortization	8.4	7.4
Amortization of debt discount and financing costs	0.8	0.5
Stock-based compensation expense	2.1	1.1
Currency and other losses in Venezuela	0.1	0.1
Deferred income taxes	8.5	(7.4)
(Gain) loss on disposal of property and equipment	(0.8)	0.7
Changes in assets and liabilities, excluding effect of currency translation:
Trade accounts receivable	(0.4)	(5.5)
Inventories	(12.7)	(1)
Accounts payable	16.7	7.3
Pension assets and liabilities, net	1.9	1.1
Other assets and liabilities, net	(27.6)	(2.5)
Net cash (used in) provided by operating activities from continuing operations	(28)	8.2
Net cash provided by operating activities from discontinued operations	14.3	16.3
Net cash (used in) provided by operating activities	(13.7)	24.5
INVESTING ACTIVITIES
Capital expenditures	(12.7)	(12.7)
Other investing activities	2.9	0.1
Net cash used in investing activities from continuing operations	(9.8)	(12.6)
Net cash used in investing activities from discontinued operations	(2.4)	(1)
Net cash used in investing activities	(12.2)	(13.6)
FINANCING ACTIVITIES
Borrowings under credit arrangements	1.6	283.1
Repayments under credit arrangements	(13)	(9.1)
Proceeds from issuance of notes	0	525
Cash paid for debt financing costs	0	(18.2)
Share repurchase under GCP 2016 Stock Incentive Plan	(0.9)	(1.7)
Proceeds from exercise of stock options	3.5	0.2
Transfers to parent, net	0	(758.7)
Net cash (used in) provided by financing activities from continuing operations	(8.8)	20.6
Net cash provided by (used in) financing activities from discontinued operations	0.4	(5.8)
Net cash (used in) provided by financing activities	(8.4)	14.8
Effect of currency exchange rate changes on cash and cash equivalents	2.8	2.4
(Decrease) increase in cash and cash equivalents	(31.5)	28.1
Cash and cash equivalents, beginning of period	163.3	98.6
Cash and cash equivalents, end of period	131.8	126.7
Less: cash and cash equivalents of discontinued operations	22.3	15.9
Cash and cash equivalents	$ 109.5	$ 110.8

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting and Financial Reporting Policies	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Summary of Significant Accounting and Financial Reporting Policies	Basis of Presentation and Summary of Significant Accounting and Financial Reporting Policies On January 27, 2016, GCP entered into a separation and distribution agreement pursuant to which W.R. Grace & Co. ("Grace") agreed to transfer its Grace Construction Products operating segment and the packaging technologies business, operated under the “Darex” name, of its Grace Materials Technologies operating segment to GCP (the "Separation"). The Separation occurred on February 3, 2016, by means of a pro rata distribution to Grace stockholders of all of the then-outstanding shares of Company common stock, at which time GCP became an independent public company and its common stock listed and began trading under the symbol "GCP" on the New York Stock Exchange. GCP is engaged in the production and sale of specialty construction chemicals and specialty building materials through two operating segments. Specialty Construction Chemicals ("SCC") manufactures and markets concrete admixtures and cement additives. Specialty Building Materials ("SBM") manufactures and markets sheet and liquid membrane systems that protect structures from water, air and vapor penetration, fireproofing and other products designed to protect the building envelope. On March 2, 2017, GCP announced the sale of its Darex Packaging Technologies ("Darex") business to Henkel AG & Co. KgaA (“Henkel”). As discussed further below under "Discontinued Operations," the results of operations for Darex have been excluded from continuing operations and segment results for all periods presented. Basis of Presentation The accompanying Consolidated Financial Statements are presented on a consolidated basis and include all of the accounts and operations of GCP and its majority-owned subsidiaries. The financial statements reflect the financial position, results of operations and cash flows of GCP in accordance with generally accepted accounting principles in the United States of America ("GAAP") and with the instructions to Form 10-Q and Article 10 of SEC Regulation S-X for interim financial information. The interim financial statements presented herein are unaudited and should be read in conjunction with the Consolidated Financial Statements presented in the Company's 2016 Annual Report on Form 10-K. Such financial statements reflect all adjustments that, in the opinion of management, are necessary for a fair statement of the results of the interim periods presented; all such adjustments are of a normal recurring nature except for the impacts of adopting new accounting standards as discussed below. All significant intercompany accounts and transactions have been eliminated. The results of operations for the three-month period ended March 31, 2017 are not necessarily indicative of the results of operations for the year ending December 31, 2017 . Discontinued Operations As noted above, on March 2, 2017, the Company entered into a final, binding and irrevocable offer letter (the "Offer Letter") with Henkel, pursuant to which Henkel made a binding offer to acquire Darex for approximately $1.05 billion (the "Acquisition"). Pursuant to the terms of the Offer Letter, following the conclusion of statutory employee consultation processes in connection with the Acquisition by the relevant works councils in France, the Company accepted Henkel’s offer and countersigned the Stock and Asset Purchase Agreement (the “Purchase Agreement”) with respect to the Acquisition on April 28, 2017. The Purchase Agreement was previously executed by Henkel. Completion of the Acquisition remains subject to the satisfaction or waiver of customary closing conditions, including regulatory approvals. In conjunction with this transaction and applicable GAAP, the assets and liabilities related to Darex have been reclassified and reflected as "held for sale" on the Consolidated Balance Sheets for all periods presented. Additionally, Darex has been reclassified and reflected as "discontinued operations" on the Consolidated Statements of Operations and Consolidated Statements of Cash Flows for all periods presented. Unless otherwise noted, the information throughout the Notes to the Consolidated Financial Statements pertains only to the continuing operations of GCP. Refer to Note 14 for further discussion of the Acquisition. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements, and the reported amounts of revenues and expenses for the periods presented. Actual amounts could differ from those estimates, and the differences could be material. Changes in estimates are recorded in the period identified. GCP's accounting measurements that are most affected by management's estimates of future events are: • Contingent liabilities, which depend on an assessment of the probability of loss and an estimate of ultimate resolution cost, that may arise from circumstances such as legal disputes, environmental remediation, product liability claims, material commitments (refer to Note 7 to the Consolidated Financial Statements) and income taxes (refer to Note 4 to the Consolidated Financial Statements); • Pension and postretirement liabilities that depend on assumptions regarding participant life spans, future inflation, discount rates and total returns on invested funds (refer to Note 5 to the Consolidated Financial Statements); and • Realization values of net deferred tax assets, which depend on projections of future taxable income (refer to Note 4 to the Consolidated Financial Statements). Reclassifications Certain amounts in prior period financial statements have been reclassified to conform to the current period presentation. Such reclassifications have not materially affected previously reported amounts. Income Tax As a global enterprise, GCP is subject to a complex array of tax regulations and must make assessments of applicable tax law and judgments in estimating its ultimate income tax liability. Refer to Note 4 for details regarding estimates used in accounting for income tax matters including unrecognized tax benefits. Stock-Based Compensation Expense Prior to the Separation, GCP was allocated stock-based compensation expense from Grace related to GCP employees receiving awards denominated in Grace equity instruments. In accordance with an employee matters agreement entered into between Grace and GCP on January 27, 2016 in connection with the Separation (the "Employee Matters Agreement"), previously outstanding stock-based compensation awards granted under Grace's equity compensation programs prior to the Separation and held by certain executives and employees of GCP and Grace were adjusted to reflect the impact of the Separation on these awards. To preserve the aggregate intrinsic value of these stock-based compensation awards, as measured immediately before and immediately after the Separation, each holder of Grace stock-based compensation awards generally received an adjusted award consisting of either (i) both a stock-based compensation award denominated in Grace equity as it existed subsequent to the Separation and a stock-based compensation award denominated in GCP equity or (ii) solely a stock-based compensation award denominated in the equity of the company at which the person was employed following the Separation. In the Separation, the determination as to which type of adjustment applied to a holder’s previously outstanding Grace award was based upon the type of stock-based compensation award that was to be adjusted and the date on which the award was originally granted under the Grace equity compensation programs prior to the Separation. Under the Employee Matters Agreement, GCP retains certain obligations related to all stock- and cash-settled stock-based compensation awards denominated in GCP equity, regardless of whether the holder is a GCP or Grace employee. Following the Separation, the Company records stock-based compensation expense for equity awards in accordance with authoritative accounting guidance. Currency Translation Assets and liabilities of foreign subsidiaries (other than those located in countries with highly inflationary economies) are translated into U.S. dollars at current exchange rates, while revenues, costs and expenses are translated at average exchange rates during each reporting period. The resulting currency translation adjustments are included in accumulated other comprehensive loss in the Consolidated Balance Sheets. The financial statements of any subsidiaries located in countries with highly inflationary economies are remeasured as if the functional currency were the U.S. dollar; the remeasurement creates translation adjustments that are reflected in net income in the Consolidated Statements of Operations. Effective January 1, 2010, GCP began to treat Venezuela as a highly inflationary economy. As a result, the functional currency of its Venezuelan subsidiary became the U.S. dollar; therefore, all translation adjustments are reflected in net income in the accompanying Consolidated Statements of Operations. Effective September 30, 2015, the Company began accounting for its results in Venezuela at the SIMADI rate. In mid-February 2016, changes to the currency exchange systems were announced that eliminated the SICAD exchange rate and replaced the name SIMADI rate with DICOM. The DICOM rate was 708 bolivars to one U.S. dollar at March 31, 2017, an increase of approximately 4.9% from the rate at December 31, 2016, resulting in an immaterial impact on income from continuing operations. In March 2017, the Venezuelan government announced that a new exchange rate would be introduced to replace the DICOM rate, although further details have not been publicly announced. Management believes the new exchange rate would result in a further devaluation of the local currency and additional currency remeasurement losses in net income. At March 31, 2017, monetary net assets denominated in local currency within the Company's Venezuela subsidiary were $8.7 million , of which $5.0 million has been reflected as "held for sale" on the Consolidated Balance Sheet . During the quarter ended March 31, 2017, except as discussed above, there were no material changes to the Company's significant accounting and financial reporting policies from those reflected in the Annual Report on Form 10-K for the year ended December 31, 2016. Recently Issued Accounting Standards Business Combinations In January 2017, the FASB issued Accounting Standards Update ("ASU") 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business , which clarifies the definition of a business when evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The update provides that when substantially all the fair value of the assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets, the transaction does not involve a business. The standard is effective for the Company on January 1, 2018, with early application permitted for certain transactions. GCP will consider the provisions of this update in conjunction with qualifying transactions in periods subsequent to March 31, 2017, as applicable. Goodwill In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350) . This ASU modifies the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value, which eliminates Step 2 from the goodwill impairment test. The standard is effective for the Company for annual or any interim goodwill impairment tests beginning on or after January 1, 2020. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Revenue from Contracts with Customers In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) . This update is intended to remove inconsistencies and weaknesses in revenue requirements; provide a more robust framework for addressing revenue issues; improve comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets; provide more useful information to users of financial statements through improved disclosure requirements; and simplify the preparation of financial statements by reducing the number of requirements to which an entity must refer. The new requirements were to be effective for fiscal years beginning after December 15, 2016, and for interim periods within those fiscal years, with early adoption not permitted. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers-Deferral of the Effective Date , deferring the effective date by one year but permitting adoption as of the original effective date. The revised standard allows for two methods of adoption: (a) full retrospective adoption, meaning the standard is applied to all periods presented, or (b) modified retrospective adoption, meaning the cumulative effect of applying the new standard is recognized as an adjustment to the opening retained earnings balance. The standard will be effective for the Company on January 1, 2018. In addition to the expanded disclosures regarding revenue, this guidance may impact timing of revenue recognition in some arrangements with variable consideration or contracts for the sale of goods and services. GCP is currently evaluating the available transition methods and the potential impact of the standard on its Consolidated Financial Statements and related disclosures. Specifically, management has established a mutli-disciplinary project team to evaluate and implement Topic 606, and the project team is currently collecting information from key organizational stakeholders to identify revenue streams for focused individual contract analysis. Leases In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , which is intended to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The core principle of Topic 842 is that a lessee should recognize the assets and liabilities that arise from leases. A lessee should recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term, including optional payments where they are reasonably certain to occur. The amendments in this update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. GCP is currently evaluating the potential impact on its Consolidated Financial Statements and related disclosures. Other new pronouncements issued but not effective until after March 31, 2017 are not expected to have a material impact on the Company's financial position, results of operations or liquidity. Recently Adopted Accounting Standards Pension and Other Postretirement Benefit Costs In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715) : Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, which changes certain presentation and disclosure requirements for employers that sponsor defined benefit pension and other postretirement benefit plans. The amendments in this ASU require entities to (1) report the service cost component of net periodic pension/postretirement benefit cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period; (2) capitalize only the service cost component of net periodic pension/postretirement benefit cost (when applicable); and (3) present other components of net periodic pension/postretirement benefit cost separately from the service cost component and outside a subtotal of income from operations (if applicable). The standard is effective for the Company on January 1, 2018, with early adoption permitted as of January 1, 2017. GCP elected to early adopt this standard in the first quarter of 2017 and has reflected only the service cost component of net periodic pension/postretirement benefit cost in "Cost of goods sold" and presented the other components of net periodic pension/postretirement benefit cost in "Other (income) expense, net," within the Consolidated Statements of Operations. In accordance with the standard, GCP utilized prior period footnote disclosures as a practical expedient to apply these retrospective presentation requirements and will prospectively apply the capitalization requirements. GCP's adoption of this standard did not have a material effect on the accompanying Consolidated Financial Statements. Inventory In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory . The update requires that inventory be measured at the lower of cost or net realizable value for entities using first-in, first-out ("FIFO") or average cost methods. The new requirements are effective for fiscal years beginning after December 15, 2016, and for interim periods within those fiscal years, with early adoption permitted. GCP adopted this standard for the 2017 first quarter and there were no material effects on the accompanying Consolidated Financial Statements.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2017
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories are stated at the lower of cost or net realizable value. GCP determines cost using the FIFO methodology. Inventories presented on GCP's Consolidated Balance Sheets consisted of the following: (In millions) March 31, December 31, Raw materials $ 35.9 $ 35.7 In process 3.4 3.6 Finished products and other 62.0 50.0 Total inventories $ 101.3 $ 89.3 Included above as "other" within "Finished products and other" are finished products purchased rather than produced by GCP of $12.7 million and $10.9 million as of March 31, 2017 and December 31, 2016 , respectively.

Debt and Other Financial Instru

Debt and Other Financial Instruments	3 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Debt and Other Financial Instruments	Debt and Other Financial Instruments Components of Debt (In millions) March 31, December 31, 9.5% Senior Notes due 2023, net of unamortized debt issuance costs of $7.1 at March 31, 2017 (2016 — $7.3) $ 517.9 $ 517.7 Term Loan due 2022, net of unamortized discount of $2.3 and unamortized debt issuance costs of $4.1 at March 31, 2017 (1) (2016 — $2.4, $4.3) 265.9 266.2 Revolving credit facility due 2021 (2) 15.0 25.0 Other borrowings (3) 21.8 22.0 Total debt 820.6 830.9 Less debt payable within one year 37.9 47.9 Debt payable after one year $ 782.7 $ 783.0 Weighted average interest rates on total debt 7.7 % 7.5 % __________________________ (1) Interest at LIBOR + 325 bps with a 75 bps LIBOR floor at March 31, 2017 . (2) Interest at LIBOR +200 bps at March 31, 2017 . (3) Represents borrowings under various lines of credit and other borrowings, primarily by non-U.S. subsidiaries. The principal maturities of debt outstanding (net of unamortized discounts and debt issuance costs) at March 31, 2017 , were as follows: (In millions) 2017 $ 37.1 2018 3.4 2019 3.4 2020 3.4 2021 2.8 Thereafter 770.5 Total debt $ 820.6 Credit Agreement On February 3, 2016, GCP entered into a credit agreement (the “Credit Agreement”) that provides for senior secured credit facilities (the “Credit Facilities”) in an aggregate principal amount of $525.0 million , consisting of: (a) term loan (the “Term Loan”) in an aggregate principal amount of $275.0 million maturing in 2022; and (b) $250.0 million revolving credit facility (the "Revolving Loan") due in 2021. The Term Loan principal balance is scheduled to be repaid in equal quarterly installments in aggregate annual amounts equal to 1.0% of the original principal amount, with the balance due upon the maturity date. The Credit Agreement contains customary affirmative covenants, including, but not limited to (i) maintenance of legal existence and compliance with laws and regulations; (ii) delivery of consolidated financial statements and other information; (iii) payment of taxes; (iv) delivery of notices of defaults and certain other material events; and (v) maintenance of adequate insurance. The Credit Agreement also contains customary negative covenants, including but not limited to restrictions on (i) dividends on, and redemptions of, equity interests and other restricted payments; (ii) liens; (iii) loans and investments; (iv) the sale, transfer or disposition of assets and businesses; (vi) transactions with affiliates; and (vii) a maximum total leverage ratio. Certain debt covenants may restrict the entity's ability as it relates to dividends, acquisitions and other borrowings. The Credit Agreement contains conditions that would require mandatory principal payments in advance of the maturity date of the Term Loan and Revolving Credit Facility; the Company was in compliance with all terms as of March 31, 2017 . Events of default under the Credit Agreement include, but are not limited to: (i) failure to pay principal, interest, fees or other amounts under the Credit Agreement when due, taking into account any applicable grace period; (ii) any representation or warranty proving to have been incorrect in any material respect when made; (iii) failure to perform or observe covenants or other terms of the Credit Agreement subject to certain grace periods; (iv) a cross-default and cross-acceleration with certain other material debt; (v) bankruptcy events; (vi) certain defaults under ERISA; and (vii) the invalidity or impairment of security interests. There are no events of default as of March 31, 2017 . The Credit Facilities are secured on a first priority basis by a perfected security interest in, and mortgages on, substantially all tangible and intangible personal property and material fee-owned real property (specifically properties in Chicago, Illinois and Mount Pleasant, Tennessee) of the Company, a pledge of 100% of the equity of each material U.S. subsidiary of the Company and 65% of the equity of the United Kingdom holding company. During 2016, GCP refinanced the existing Credit Agreement with a syndicate of banks (the “Amended Credit Agreement”). The Amended Credit Agreement reduced the interest rate margins applicable to the Term Loan from base rate plus a margin of 3.5% or LIBOR plus a margin of 4.5% to a base rate plus a margin of 2.25% or LIBOR plus a margin of 3.25% at GCP’s option. The outstanding principal balance was replaced by a like aggregate principal balance with substantially similar terms to the Credit Agreement. The interest rate per annum applicable to the Revolving Loan is equal to, at GCP’s option, either a base rate plus a margin ranging from 0.5% to 1.0% or LIBOR plus a margin ranging from 1.5% to 2.0% , in either case based upon the total leverage ratio of GCP and its restricted subsidiaries. During 2016, GCP borrowed $25.0 million on its Revolving Loan and used the funds, together with cash on hand, to acquire Halex Corporation. Of the $25.0 million draw, $15.0 million was outstanding as of March 31, 2017 alongside approximately $9 million in outstanding letters of credit, which reduced available credit under that facility to $226.0 million . The summary above of the Credit Agreement and Amended Credit Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of such agreements, copies of which have been filed with the SEC. Senior Notes On January 27, 2016, GCP issued $525.0 million aggregate principal amount of 9.5% Senior Notes due 2023 (the “Notes”). Interest is payable semi-annually in arrears on February 1 and August 1 of each year. The Notes were issued subject to covenants that limit the Company's and certain of its subsidiaries’ ability, subject to certain exceptions and qualifications, to (i) create or incur liens on assets, (ii) incur additional debt (iii) sell certain assets (iv) make certain investments and acquisitions, merge or sell or otherwise dispose of all or substantially all assets. Divestiture of Darex As discussed in Note 1, on March 2, 2017, the Company entered into the Offer Letter with Henkel, pursuant to which Henkel made a binding offer to acquire Darex for approximately $1.05 billion , subject to working capital and certain other adjustments. The proposed sale of Darex is a permitted transaction under the Company's Credit Agreement and the Indenture governing the Notes. Under the Credit Agreement and Indenture, the Company would be required to use any net cash proceeds from the proposed sale of Darex to prepay debt or make investments in its business over a period of approximately 18 months . Refer to Note 14 for further discussion of the proposed sale of Darex. During 2016, GCP incurred debt issuance costs relating to issuance of the Notes, Term Loan, and Revolving Loan of $8.0 million , $5.0 million and $5.2 million , respectively. GCP deducted the debt issuance costs relating to the Notes and the Term Loan from the carrying amounts presented on its Consolidated Balance Sheet and is amortizing those costs over the terms of the underlying obligations. GCP classified debt issuance costs relating to the Revolving Loan in "Other assets" on its Consolidated Balance Sheet and is amortizing those costs over the term of the Revolving Loan. The unamortized portion of these costs was $4.0 million as of March 31, 2017 and $4.2 million as of December 31, 2016 . During the first quarter of 2016, GCP used certain proceeds from the Notes and Credit Facilities to fund a distribution to Grace in an amount of $750.0 million related to the Separation. Approximately $50 million was retained to meet operating requirements and to pay fees associated with the debt financing and other costs of the Separation that may be incurred subsequent to the Separation. Related party debt of approximately $42 million and related interest was transferred from Grace to GCP in connection with the Separation. Debt Fair Value At March 31, 2017 , the carrying amounts and fair values of GCP's debt were as follows: March 31, 2017 December 31, 2016 (In millions) Carrying Amount Fair Value Carrying Amount Fair Value 9.5% Senior Notes due 2023 $ 517.9 $ 595.7 $ 517.7 $ 603.1 Term Loan due 2022 265.9 268.9 266.2 274.6 Revolving credit facility due 2021 15.0 15.0 25.0 25.0 Other borrowings 21.8 21.8 22.0 22.0 Total debt $ 820.6 $ 901.4 $ 830.9 $ 924.7 Fair value is determined based on Level 2 inputs, including expected future cash flows (discounted at market interest rates), estimated current market prices and quotes from financial institutions. The decrease in fair value as of March 31, 2017 was due primarily to the Federal Reserve raising the federal funds target rate during the first quarter of 2017.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The income tax provision on continuing operations for the three months ended March 31, 2017 and 2016 was $11.6 million and $1.7 million , respectively, representing effective tax rates of ( 86.6% ) and 21.0% , respectively. The increase in the effective tax rate for the three month period of 107.6 percentage points compared to the same period in 2016 was primarily due to the recording of valuation allowances against certain U.S., Brazil, and Turkey deferred tax assets and a change in the Company’s assertion that it is indefinitely reinvested in Mexico, as further discussed below. The difference between the provision for income taxes at the U.S. federal income tax rate of 35% and GCP’s overall income tax rate is summarized below. Three Months Ended March 31, (In millions) 2017 2016 Tax provision at U.S. federal income tax rate $ (4.7 ) $ 2.8 Change in provision resulting from: Valuation allowance 13.8 — Tax on undistributed foreign earnings 1.9 — Effect of tax rates in foreign jurisdictions 0.7 (0.6 ) Permanent items and other (0.1 ) (0.5 ) Provision for income taxes $ 11.6 $ 1.7 For the three months ended March 31, 2017 and 2016, GCP recorded income tax expense on discontinued operations of $1.8 million and $5.9 million , respectively. Refer to Note 14 for further details. As of December 31, 2016, GCP had the intent and ability to indefinitely reinvest undistributed earnings of its foreign subsidiaries outside the United States. During the first quarter of 2017, GCP determined it could no longer assert it is indefinitely reinvested in Mexico because that entity is anticipated to be sold as part of the Darex transaction. The tax associated with its outside book and tax basis difference in Mexico was recorded during the quarter as a discrete item resulting in a tax expense of $1.9 million . GCP believes that the anticipated sale of Darex is a one-time, non-recurring event and that recognition of deferred taxes of undistributed earnings during 2017 would not have occurred if not for the anticipated sale. As of March 31, 2017, GCP has the intent and ability to indefinitely reinvest undistributed earnings of all its other foreign subsidiaries outside the United States. Subsequent to the anticipated sale of Darex, GCP expects undistributed prior-year earnings of its foreign subsidiaries to remain indefinitely reinvested except in certain instances where repatriation of such earnings would result in minimal or no tax. GCP bases this assertion on: (1) the expectation that it will satisfy its U.S. cash obligations in the foreseeable future without requiring the repatriation of prior-year foreign earnings; (2) plans for significant and continued reinvestment of foreign earnings in organic and inorganic growth initiatives outside the U.S.; and (3) remittance restrictions imposed by local governments. GCP will continually analyze and evaluate its cash needs to determine the appropriateness of its indefinite reinvestment assertion. In evaluating GCP's ability to realize its deferred tax assets, GCP considers all reasonably available positive and negative evidence, including recent earnings experience, expectations of future taxable income and the tax character of that income, the period of time over which the temporary differences become deductible and the carryforward and/or carryback periods available to GCP for tax reporting purposes in the related jurisdiction. In estimating future taxable income, GCP relies upon assumptions and estimates about future activities, including the amount of future federal, state and foreign pretax operating income that GCP will generate; the reversal of temporary differences; and the implementation of feasible and prudent tax planning strategies. GCP records a valuation allowance to reduce deferred tax assets to the amount that it believes is more likely than not to be realized. During the first quarter of 2017, GCP determined it is more likely than not a portion of its deferred tax assets will not be realized. As a result, GCP recorded valuation allowances on those deferred tax assets during the quarter as discrete items, as they are significant, unusual and infrequent in nature. The allowances recorded relate to $4.3 million of U.S. foreign tax credit carryovers and $9.1 million and $0.4 million of Brazil and Turkey deferred tax assets, respectively, relating primarily to net operating loss carryovers. The determination to record the valuation allowances in the first quarter was made predominantly due to the anticipated sale of Darex and its impact on future taxable income and the ability to utilize those tax assets. As also discussed in Note 1, on February 3, 2016 the Separation of Grace and GCP was completed. In conjunction with the Separation, GCP increased its deferred tax assets and prepaid taxes in the U.S. by approximately $74 million , which primarily relates to the step up in tax basis and transfer of a net pension liability. In connection with the Separation, GCP and Grace entered into various agreements that govern the relationship between the parties going forward, including a tax matters agreement (the "Tax Sharing Agreement"). Under the Tax Sharing Agreement, which was entered into on the distribution date, GCP and Grace will indemnify and hold each other harmless in accordance with the principles outlined therein. During the first quarter of 2017, GCP reached a proposed favorable settlement with the Canada Revenue Agency for tax years 2007-2015. As a result of the proposed settlement, a tax benefit of $1.5 million , primarily for an anticipated refund of previously paid tax, was recorded during the quarter. GCP is required to pay Grace for the amount of the expected tax refund pursuant to the Tax Sharing Agreement in effect. GCP also recorded a charge to its U.S. deferred tax assets of $1.6 million related to the settlement due to the reduction of its step-up in tax basis. Both adjustments were recorded as discrete tax items.

Pension Plans and Other Postret

Pension Plans and Other Postretirement Benefit Plans	3 Months Ended
	Mar. 31, 2017
Pension and Other Postretirement Benefit Expense [Abstract]
Pension Plans and Other Postretirement Benefit Plans	Pension Plans and Other Postretirement Benefit Plans Postretirement Benefits Other Than Pensions Prior to the Separation, Grace provided postretirement life insurance benefits for retired employees of certain U.S. business units and certain divested business units. GCP’s allocated income for these postretirement life insurance benefits plan was $1.2 million for the three months ended March 31, 2016 . The postretirement life insurance benefits plan liability related to GCP employees who were participants in this plan at the time of Separation was legally transferred to GCP. During the second half of 2016, GCP eliminated retiree life insurance benefits at the remaining bargaining locations and, as a result, did not recognize any related amounts in its Consolidated Statement of Operations for the three months ended March 31, 2017. Pension Plans GCP sponsors certain defined benefit pension plans, primarily in the U.S. and the U. K. in which GCP employees participate. GCP records an asset or liability to recognize the funded status of these pension plans in its Consolidated Balance Sheets. The following table presents the funded status of GCP's overfunded, underfunded and unfunded defined pension plans from continuing operations: (In millions) March 31, December 31, Overfunded defined benefit pension plans $ 22.0 $ 21.2 Underfunded defined benefit pension plans (57.7 ) (55.6 ) Unfunded defined benefit pension plans (28.5 ) (27.6 ) Total underfunded and unfunded defined benefit pension plans (86.2 ) (83.2 ) Pension liabilities included in other current liabilities (0.5 ) (0.4 ) Net funded status $ (64.7 ) $ (62.4 ) Overfunded plans include several advance-funded plans for which the fair value of the plan assets exceeds the projected benefit obligation ("PBO"). This group of plans was overfunded by $22.0 million as of March 31, 2017 , and the overfunded status is reflected as assets in "Overfunded defined benefit pension plans" in the Consolidated Balance Sheets. Underfunded plans include a group of advance-funded plans that are underfunded on a PBO basis. Unfunded plans include several plans that are funded on a pay-as-you-go basis, and therefore, the entire PBO is unfunded. As of March 31, 2017 , the combined balance of $86.7 million for the underfunded and unfunded plans included as liabilities in the Consolidated Balance Sheets is comprised of current and non-current components of $0.5 million in "Other current liabilities" and $86.2 million in "Underfunded and unfunded defined benefit pension plans," respectively. Components of Net Periodic Benefit Cost (Income) Three Months Ended March 31, 2017 2016 Pension Other Post Pension Other Post (In millions) U.S. Non-U.S. U.S. Non-U.S. Service cost $ 1.9 $ 1.0 $ — $ 1.5 $ 0.9 $ — Interest cost 1.5 1.5 — 1.2 2.1 — Expected return on plan assets (1.4 ) (1.7 ) — (1.2 ) (2.3 ) — Amortization of prior service credit — — — — — (0.1 ) Net periodic benefit cost (income) (1) $ 2.0 $ 0.8 $ — $ 1.5 $ 0.7 $ (0.1 ) Less: Discontinued operations — 0.2 — — 0.3 — Net periodic benefit cost (income) from continuing operations $ 2.0 $ 0.6 $ — $ 1.5 $ 0.4 $ (0.1 ) _______________________________ (1) Includes expense that was allocated to Grace of $0.1 million for the three months ended March 31, 2016 . Plan Contributions and Funding GCP intends to satisfy its funding obligations under the U.S. qualified pension plans and to comply with all of the requirements of the Employee Retirement Income Security Act of 1974, as amended ("ERISA"). For ERISA purposes, funded status is calculated on a different basis than under GAAP. GCP intends to fund non-U.S. pension plans based on applicable legal requirements as well as actuarial and trustee recommendations. Defined Contribution Retirement Plan As part of the Separation, GCP established a defined contribution retirement plan for its employees in the U.S. This plan is qualified under section 401(k) of the U.S. tax code. Currently, GCP contributes an amount equal to 100% of employee contributions, up to 6% of an individual employee's salary or wages. GCP's costs included in selling, general and administrative expenses related to this benefit plan for the three months ended March 31, 2017 were $1.4 million , compared with GCP's allocation of the total cost related to this benefit plan for the three months ended March 31, 2016 of $1.0 million .

Other Balance Sheet Accounts

Other Balance Sheet Accounts	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other Balance Sheet Accounts	Other Balance Sheet Accounts (In millions) March 31, December 31, Other Current Assets: Non-trade receivables $ 19.0 $ 19.9 Income tax receivable 18.0 10.6 Prepaid and other 16.1 12.4 Total other current assets $ 53.1 $ 42.9 (In millions) March 31, December 31, Other Current Liabilities Customer volume rebates $ 21.7 $ 30.5 Accrued compensation (1) 20.0 28.0 Income tax payable 5.3 6.7 Accrued interest 8.3 20.8 Pension liabilities 0.5 0.4 Other accrued liabilities 41.1 33.1 Total other current liabilities $ 96.9 $ 119.5 ________________________________ (1) Accrued compensation in the table above includes salaries and wages as well as estimated current amounts due under the annual and long-term incentive programs.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Commitments and Contingent Liabilities Purchase Commitments GCP uses purchase commitments to ensure supply and to minimize the volatility of certain key raw materials including lignins, polycarboxylates, amines and other materials. Such commitments are for quantities that GCP fully expects to use in its normal operations. Guarantees and Indemnification Obligations GCP is a party to many contracts containing guarantees and indemnification obligations. These contracts primarily consist of: • Product warranties with respect to certain products sold to customers in the ordinary course of business. These warranties typically provide that products will conform to specifications. GCP accrues a general warranty liability at the time of sale based on historical experience and on a transaction-specific basis according to individual facts and circumstances. Both the liability and annual expense related to product warranties are immaterial to the Consolidated Financial Statements. • Performance guarantees offered to customers. GCP has not established a liability for these arrangements based on past performance. • Contracts providing for the sale of a former business unit or product line in which GCP has agreed to indemnify the buyer against liabilities arising prior to the closing of the transaction, including environmental liabilities. • The Tax Sharing Agreement, which may require GCP, in certain circumstances, to indemnify Grace if the Separation, together with certain related transactions, does not qualify under Section 355 and certain other relevant provisions of the Internal Revenue Code (the "Code"). If GCP is required to indemnify Grace under the Tax Sharing Agreement, it could be subject to significant tax liabilities. Environmental Matters GCP is subject to loss contingencies resulting from extensive and evolving federal, state, local and foreign environmental laws and regulations relating to the generation, storage, handling, discharge, disposition and stewardship of hazardous wastes and other materials. GCP accrues for anticipated costs associated with response efforts where an assessment has indicated that a probable liability has been incurred and the cost can be reasonably estimated. As of March 31, 2017 , GCP did not have any material environmental liabilities. GCP's environmental liabilities are reassessed whenever circumstances become better defined or response efforts and their costs can be better estimated. These liabilities are evaluated based on currently available information, including the progress of remedial investigations at each site, the current status of discussions with regulatory authorities regarding the method and extent of remediation at each site, existing technology, prior experience in contaminated site remediation and the apportionment of costs among potentially responsible parties. Financial Assurances Financial assurances have been established for a variety of purposes, including insurance and environmental matters and other matters. At March 31, 2017 , GCP had gross financial assurances issued and outstanding of approximately $9 million , composed of standby letters of credit. Lawsuits and Investigations In Re: Library Gardens Balcony Litigation, Lead Case Beary v. Blackrock, Inc. Case No. RG15793054 was filed on November 12, 2015 in Alameda County Superior Court in California. It is the lead case in a consolidated lawsuit filed on behalf of six individuals who died and an additional seven individuals who were injured in a balcony collapse, which occurred on June 16, 2015 in Berkeley, California. The consolidated complaint names the Company as the sole party in the category of suppliers of materials and names twenty additional defendants in other categories, including categories for property owners, property managers, construction defendants, and development and design defendants. The consolidated complaint alleges product liability against the Company concerning one of its products. The plaintiffs seek unspecified monetary damages against all defendants and punitive damages only against the building owners, building manager and two construction company defendants. Discovery is ongoing and the trial date has been set for February 5, 2018. The Company intends to defend this action vigorously. At this time, based on available information regarding this litigation, the Company is unable to reasonably assess the ultimate outcome of this matter or determine an estimate, or a range of estimates, of potential losses, if any, that might result from an adverse resolution of this matter. In addition to the above, from time to time, GCP and its subsidiaries are parties to, or targets of, lawsuits, claims, investigations and proceedings which are managed and defended in the ordinary course of business. While GCP is unable to predict the outcome of these matters, it does not believe, based upon currently available facts, that the ultimate resolution of any of such pending matters will have a material adverse effect on its overall financial condition, results of operations or cash flows. Accounting for Contingencies Although the outcome of each of the matters discussed above cannot be predicted with certainty, GCP has assessed its risk and has made accounting estimates and disclosures as required under GAAP.

Restructuring and Repositioning

Restructuring and Repositioning Expenses	3 Months Ended
	Mar. 31, 2017
Restructuring and Related Activities [Abstract]
Restructuring and Repositioning Expenses	Restructuring and Repositioning Expenses Restructuring Expenses GCP's Board of Directors approves all major restructuring programs that may involve the discontinuance of significant product lines or the shutdown of significant facilities. From time to time, GCP takes additional restructuring actions, including involuntary terminations that are not part of a major program. GCP accounts for these costs, which are reflected in "Restructuring expenses" in its Consolidated Statements of Operations, in the period that the related liabilities are incurred. Restructuring expenses are excluded from segment operating income. For the first quarter of 2017 , GCP incurred $1.1 million ( $0.8 million in SCC and $ 0.3 million in SBM) of restructuring expenses, which were comprised primarily of severance-related costs associated with the Separation, as well as costs related to plant closures. For the prior-year quarter, GCP incurred $0.9 million ( $0.5 million in SCC and $0.4 million in SBM) of restructuring expenses related to the Separation. GCP had restructuring liabilities of $1.6 million as of March 31, 2017 and $1.1 million as of December 31, 2016 primarily related to severance actions taken during the periods. GCP expects to pay substantially all costs related to its current restructuring programs by December 31, 2017 . Restructuring Liability (In millions) Total Balance, December 31, 2016 $ 1.1 Accruals for severance 0.8 Payments (0.3 ) Balance, March 31, 2017 $ 1.6 Repositioning Expenses Post-Separation, GCP has incurred expenses related to its transition to a stand-alone public company. The Company expects to incur these repositioning expenses, ranging from $18.0 million to $20.0 million , by the end of the second quarter of 2017. Repositioning expenses primarily relate to the following: • accounting, tax, legal and other professional costs pertaining to the Separation and establishment as a stand-alone public company; • costs relating to information technology systems and marketing expense for repackaging and re-branding; • employee-related costs that would not be incurred absent the Separation primarily relating to compensation, benefits, retention bonuses related to new or transitioning employees; and • recruitment and relocation costs associated with hiring and relocating employees. Due to the scope and complexity of these activities, the range of estimated repositioning expenses could increase or decrease and the timing of incurrence could change. For the three months ended March 31, 2017 , GCP incurred repositioning expenses as follows: Three Months Ended March 31, (In millions) 2017 2016 Professional fees $ 1.4 $ 2.1 Software and IT implementation fees 0.3 — Employee-related costs 0.3 2.2 Total $ 2.0 $ 4.3 GCP accounts for these costs, which are reflected in "Repositioning expenses" in the accompanying Consolidated Statements of Operations, in the period incurred. Substantially all of these costs have been or are expected to be settled in cash. Total cash payments for the three months ended March 31, 2017 were $1.1 million for repositioning expenses and $ 0.8 million for related capital expenditures.

Other Comprehensive Income

Other Comprehensive Income	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Other Comprehensive Income	Other Comprehensive Income The following tables present the pre-tax, tax and after-tax components of GCP's other comprehensive income for the three months ended March 31, 2017 and 2016 : Three Months Ended March 31, 2017 (In millions) Pre-Tax Amount Tax (Expense)/ Benefit After-Tax Amount Currency translation adjustments $ 12.6 — $ 12.6 Other comprehensive income attributable to GCP shareholders $ 12.6 $ — $ 12.6 Three Months Ended March 31, 2016 (In millions) Pre-Tax Amount Tax (Expense)/ Benefit After-Tax Amount Defined benefit pension and other postretirement plans: Amortization of net prior service cost included in net periodic benefit cost $ (0.1 ) $ — $ (0.1 ) Assumption of net prior service credit 1.2 (0.4 ) 0.8 Assumption of net actuarial loss (1.1 ) 0.4 (0.7 ) Benefit plans, net — — — Currency translation adjustments 3.9 — 3.9 Loss from hedging activities (0.2 ) — (0.2 ) Other comprehensive income attributable to GCP shareholders $ 3.7 $ — $ 3.7 The following tables present the changes in accumulated other comprehensive income (loss), net of tax, for the three months ended March 31, 2017 and 2016 : Three Months Ended March 31, 2017 (In millions) Defined Benefit Pension and Other Postretirement Plans Currency Translation Adjustments Gains (Losses) from Hedging Activities Total Beginning balance $ 0.1 $ (147.7 ) $ — $ (147.6 ) Other comprehensive income before reclassifications — 12.6 0.1 12.7 Amounts reclassified from accumulated other comprehensive income — — (0.1 ) (0.1 ) Net current-period other comprehensive income — 12.6 — 12.6 Ending balance $ 0.1 $ (135.1 ) $ — $ (135.0 ) Three Months Ended March 31, 2016 (In millions) Defined Benefit Pension and Other Postretirement Plans Currency Translation Adjustments Gains (Losses) from Hedging Activities Total Beginning balance $ 0.1 $ (127.8 ) $ — $ (127.7 ) Other comprehensive income (loss) before reclassifications 0.1 3.9 (0.5 ) 3.5 Amounts reclassified from accumulated other comprehensive income (loss) (0.1 ) — 0.3 0.2 Net current-period other comprehensive income (loss) — 3.9 (0.2 ) 3.7 Ending balance $ 0.1 $ (123.9 ) $ (0.2 ) $ (124.0 ) GCP is a global enterprise operating in over 35 countries with local currency generally deemed to be the functional currency for accounting purposes. The currency translation adjustments reflect translation of the balance sheets valued in local currencies to the U.S. dollar as of the end of each period presented, and translation of revenues and expenses at average exchange rates for each period presented.

Stock Incentive Plans

Stock Incentive Plans	3 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Incentive Plans	Stock Incentive Plans GCP has provided certain key employees equity awards in the form of stock options, performance-based units (“PBUs”) and restricted share units (“RSUs”) under the GCP 2016 Stock Incentive Plan, which was adopted at Separation. Certain employees and members of the Board of Directors are eligible to receive stock-based compensation, including stock, stock options, RSUs and PBUs. Total cash and non-cash stock-based compensation cost included in "(Loss) income from continuing operations before income taxes" on the Consolidated Statements of Operations is $2.7 million and $1.1 million for the three months ended March 31, 2017 and 2016, respectively. During 2016, previously outstanding stock-based compensation awards granted under Grace’s equity compensation programs prior to the Separation were adjusted to reflect the impact of the Separation. To preserve the aggregate intrinsic value of those Grace awards, as measured immediately before and immediately after the Separation, each holder of Grace stock-based compensation awards generally received an adjusted award consisting of either (i) both a stock-based compensation award denominated in Grace equity as it existed subsequent to the Separation and a stock-based compensation award denominated in GCP equity or (ii) solely a stock-based compensation award denominated in the equity of the company at which the person was employed following the Separation. Adjusted awards consisting of stock-based compensation awards denominated in GCP equity are considered issued under the GCP 2016 Stock Incentive Plan. These adjusted awards generally will be subject to the same vesting conditions and other terms that applied to the original Grace awards before the Separation. Under the Employee Matters Agreement, GCP is obligated to settle all of the stock-based compensation awards denominated in GCP equity, regardless of whether the holders are employees of GCP or Grace. Likewise, Grace is obligated to settle all of the stock-based compensation awards denominated in Grace shares, regardless of whether the holders are employees of GCP or Grace. As a result, GCP has recorded a liability for cash-settled awards held by Grace employees. The adjustment of the original Grace awards that resulted in the issuance of GCP stock-based compensation awards resulted in an immaterial charge in the first quarter of 2016. In accordance with certain provisions of the GCP 2016 Stock Incentive Plan, GCP repurchases shares issued to certain holders of GCP awards in order to fulfill statutory tax withholding requirements for the employee. In the three months ended March 31, 2017 and 2016, GCP repurchased approximately 33,000 and 84,000 shares respectively, under these provisions. These purchases are reflected as "Treasury stock purchased under 2016 Stock Incentive Plan" in the Consolidated Statements of Equity (Deficit). As of March 31, 2017 , 656,205 shares of common stock were available for issuance under the GCP 2016 Stock Incentive Plan. Stock Options Stock options are non-qualified and are set at exercise prices not less than 100% of the market value on the date of grant (market value is the average of the high price and low price from that trading day). Stock option awards that relate to Grace stock options originally granted prior to the Separation have a contractual term of five years from the original date of grant. Stock option awards granted post-Separation have a contractual term of seven or ten years from the original date of grant. Generally, stock options vest in substantially equal amounts each year over three years from the date of grant. GCP values stock options using the Black-Scholes option pricing model, which was developed for use in estimating the fair value of traded options. The risk-free rate is based on the U.S. Treasury yield curve published as of the grant date, with maturities approximating the expected term of the options. GCP estimates the expected term of the options according to the simplified method as allowed by FASB Accounting Standards Codification ("ASC") Topic No. 718-20, Awards Classified as Equity, whereby the average between the vesting period and contractual term is used. GCP estimated the expected volatility using an industry peer group. The following summarizes GCP's assumptions for estimating the fair value of stock options granted during 2017 : Assumptions used to calculate expense for stock option Three Months Ended March 31, 2017 Risk-free interest rate 1.95 - 2.10% Average life of options (years) 5.5 - 6.5 Volatility 31.42 - 31.96% Dividend yield — Average fair value per stock option $9.13 The following table summarizes GCP stock option activity for the three months ended March 31, 2017 : Stock Option Activity Number Of Weighted Weighted Aggregated Outstanding, December 31, 2016 2,122 $ 16.92 3.57 $ 20,748 Options exercised 325 12.73 Options forfeited/expired/canceled 4 18.79 Options granted 235 26.40 Outstanding, March 31, 2017 2,028 18.69 4.07 28,863 Exercisable March 31, 2017 814 $ 17.05 2.89 $ 5,776 The aggregate intrinsic values in the table above represent the total pre-tax intrinsic value (the difference between GCP's closing stock price on the last trading day of March 31, 2017 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their in-the-money options at period end. The amount changes based on the fair market value of GCP's stock. The intrinsic value of all options exercised in the three-month period ended March 31, 2017 was $12.9 million . Total unrecognized stock-based compensation expense for stock options outstanding at March 31, 2017 , was $3.0 million and the weighted-average period over which this expense will be recognized is approximately 1.2 years. Restricted Stock Units and Performance Based Units Upon Separation, certain previously outstanding RSUs and PBUs granted under Grace's equity compensation programs prior to the Separation were adjusted, in accordance with the Employee Matters Agreement, such that holders of these original Grace RSUs and PBUs received RSUs denominated in GCP equity. RSUs generally vest over a three year period, with vesting in substantially equal amounts each year over three years and some vesting 100% after the third year from the date of grant. A smaller number of RSUs were designated as sign-on awards and used for purposes of attracting key employees and to cover outstanding awards from a prior employer and vest 100% after two years . GCP’s RSU activity for the three months ended March 31, 2017 is as follows: RSU Activity Number Of Weighted Outstanding, December 31, 2016 538 $ 17.22 RSUs settled 112 17.17 RSUs forfeited 1 16.90 RSUs granted 93 26.34 RSUs outstanding, March 31, 2017 518 $ 18.86 During the three months ended March 31, 2017 , GCP distributed 79,134 shares and $0.9 million of cash to settle RSUs. GCP's expectations of future RSU vesting and settlement are as follows: Year Number of Shares Vesting (in thousands) Settled in Cash Settled in Stock 2017 31 —% 100% 2018 197 10% 90% 2019 262 —% 100% 2020 28 —% 100% During the three months ended March 31, 2017 , GCP granted 162,328 PBUs under the GCP 2016 Stock Incentive Plan to Company employees. These awards vest on February 2020 subject to continued employment through the payment date, and have a weighted average grant date fair value of $26.40 . PBUs that were granted during the year ended December 31, 2016 under the GCP 2016 Stock Incentive Plan to Company employees remain outstanding as of March 31, 2017 . These awards vest in February 2019 subject to continued employment through the payment date, and have a weighted average grant date fair value of $17.04 . GCP anticipates that 100% of the PBUs will be settled in GCP common stock upon vesting. During the quarter ended March 31, 2017 , none of these awards were forfeited. PBUs granted in 2017 are measured based on a three -year cumulative adjusted diluted earnings per share metric that is modified up or down based on relative total shareholder return performance against the Russell 3000 Index. The number of shares ultimately provided to an employee who received a 2017 PBU grant will be based on Company performance against this measure, and can range from 0% to 200% of the target number of shares granted based upon the level of achievement of this measure. The awards will be settled in 2020 once actual performance, which is measured over fiscal years 2017 - 2019 , is certified by the Compensation Committee. PBUs and RSUs are recorded at fair value at the date of grant. The common stock-settled portion of each such award is considered an equity award, with the stock compensation expense being determined based on GCP’s stock price on the grant date. The cash settled portion of the award is considered a liability award with the liability being remeasured each reporting period based on GCP’s then current stock price. PBUs are remeasured each reporting period based on the expected payout of the award, which may range from 0% to 200% of the targets for such awards; therefore, these portions of the awards are subject to volatility until the payout is finally determined at the end of the performance period. As of March 31, 2017 , $11.7 million of total unrecognized compensation expense related to the RSU and PBU awards is expected to be recognized over the remaining weighted-average service period of 1.5 years.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table shows a reconciliation of the numerators and denominators used in calculating basic and diluted (loss) earnings per share: Three Months Ended March 31, (In millions, except per share amounts) 2017 2016 Numerators Net (loss) income from continuing operations attributable to GCP shareholders $ (25.0 ) $ 6.0 Income from discontinued operations, net of income taxes $ 8.1 $ 11.8 Net (loss) income attributable to GCP shareholders $ (16.9 ) $ 17.8 Denominators Weighted average common shares—basic calculation 71.2 70.6 Dilutive effect of employee stock awards — 0.3 Weighted average common shares—diluted calculation 71.2 70.9 Basic (loss) earnings per share Net (loss) income from continuing operations attributable to GCP shareholders $ (0.35 ) $ 0.08 Income from discontinued operations, net of income taxes $ 0.11 $ 0.17 Net (loss) income attributable to GCP shareholders $ (0.24 ) $ 0.25 Diluted (loss) earnings per share Net (loss) income from continuing operations attributable to GCP shareholders $ (0.35 ) $ 0.08 Income from discontinued operations, net of income taxes $ 0.11 $ 0.17 Net (loss) income attributable to GCP shareholders $ (0.24 ) $ 0.25 In 2016, the computation of basic and diluted earnings per common share is calculated assuming the number of shares of GCP common stock outstanding on February 3, 2016 had been outstanding at the beginning of the period. There were approximately 0.1 million anti-dilutive options and no anti-dilutive RSUs outstanding on a weighted-average basis for the three months ended March 31, 2017 . There were approximately 0.6 million anti-dilutive options and 0.2 million anti-dilutive RSUs outstanding on a weighted average basis for the three months ended March 31, 2016. During the three months ended March 31, 2017 and 2016, GCP repurchased approximately 33,000 shares and 84,000 shares of Company common stock for $0.9 million and $1.7 million , respectively, in connection with its equity compensation programs.

Related Party Transactions and

Related Party Transactions and Transactions with Grace	3 Months Ended
	Mar. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions and Transactions with Grace	Related Party Transactions and Transactions with Grace Related Parties All contracts with related parties are at rates and terms that GCP believes are comparable with those that could be entered into with independent third parties. Subsequent to the Separation, transactions with Grace represent third-party transactions. Allocation of General Corporate Expenses Prior to the Separation, the financial statements included expense allocations for certain functions provided by Grace as well as other Grace employees not solely dedicated to GCP, including, but not limited to, general corporate expenses related to finance, legal, information technology, human resources, communications, ethics and compliance, shared services, employee benefits and incentives and stock-based compensation. These expenses were allocated to GCP on the basis of direct usage when identifiable, with the remainder allocated on the basis of revenue, headcount or other measures. Between January 1, 2016 and the Separation, GCP was allocated $ 2.0 million of general corporate expense, which is primarily included within "Selling, general and administrative expenses" in the accompanying Statement of Operations for the three months ended March 31, 2016. Transition Services Agreement In connection with the Separation, the Company entered into a transition services agreement pursuant to which GCP and Grace provide various services to each other on a temporary, transitional basis. The services provided by Grace to GCP include information technology, treasury, tax administration, accounting, financial reporting, human resources and other services. Following the Separation, Grace has continued to provide some of these services on a transitional basis, generally for a period of up to 18 months from the date of Separation. Tax Sharing Agreement The Tax Sharing Agreement governs the parties’ respective rights, responsibilities and obligations with respect to tax liabilities and benefits, tax attributes, the preparation and filing of tax returns, the control of audits and other tax proceedings, and other matters regarding taxes. In general, and subject to the terms of the Tax Sharing Agreement, GCP is responsible for all U.S. federal, state and foreign taxes (and any related interest, penalties or audit adjustments) reportable on a GCP separate return (a return that does not include Grace or any of its subsidiaries); and Grace is responsible for all U.S. federal, state and foreign income taxes (and any related interest, penalties or audit adjustments) reportable on a consolidated, combined or unitary return that includes Grace or any of its subsidiaries and GCP or any of its subsidiaries up to the Separation date. As of the balance sheet date, GCP has included $3.7 million of indemnified receivables in "Other assets" and $2.4 million of indemnified payables in "Other current liabilities." In addition, the Tax Sharing Agreement imposes certain restrictions on GCP and its subsidiaries (including restrictions on share issuances, business combinations, sales of assets and similar transactions) that are designed to preserve the qualification of the Distribution, together with certain related transactions, under Section 355 and certain other relevant provisions of the Code. The Tax Sharing Agreement provides special rules that allocate tax liabilities in the event the Distribution, together with certain related transactions, does not so qualify. In general, under the Tax Sharing Agreement, each party is expected to be responsible for any taxes imposed on, and certain related amounts payable by, GCP or Grace that arise from the failure of the Distribution and certain related transactions, to qualify under Section 355 and certain other relevant provisions of the Code, to the extent that the failure to so qualify is attributable to actions, events or transactions relating to such party’s respective stock, assets or business, or a breach of the relevant representations or covenants made by such party in the Tax Sharing Agreement. Parent Company Equity Net transfers to parent are included within net parent investment on the Consolidated Statements of (Deficit) Equity. The components of the net transfers to parent as of March 31, 2016 are as follows: (In millions) 2016 Cash pooling and general financing activities $ (690.8 ) GCP expenses funded by parent 6.6 Corporate costs allocations 2.0 Provision for income taxes 4.3 Total net transfers to parent (677.9 ) Other, net (80.8 ) Transfers to parent, net, per Consolidated Statement of Cash Flows $ (758.7 ) In the three months ended March 31, 2017, there were no adjustments to parent company equity. In 2016, "Other, net" includes the non-cash transfer from parent of approximately $44 million of net pension liabilities, approximately $23 million of fixed assets and the non-cash transfer of approximately $36 million of related-party debt, deferred tax items and other items. As discussed in Note 3, GCP used proceeds from the Notes and Credit Facilities to fund a distribution to Grace in an amount of $750.0 million related to the Separation. This distribution is reflected as a component of transfers to parent in the table above.

Operating Segment Information

Operating Segment Information	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Operating Segment Information	Operating Segment Information GCP is engaged in the production and sale of specialty construction chemicals and specialty building materials through two operating segments. Specialty Construction Chemicals manufactures and markets concrete admixtures and cement additives. Specialty Building Materials manufactures and markets sheet and liquid membrane systems that protect structures from water, air and vapor penetration, fireproofing, and other products designed to protect the building envelope. The table below presents information related to GCP's operating segments. Only those corporate expenses directly related to the operating segments are allocated for reporting purposes. GCP excludes certain functional costs, impacts of foreign exchange (related primarily to Venezuela) and other corporate costs such as certain performance-based incentive compensation and public company costs from segment operating income. GCP also excludes certain ongoing defined benefit pension costs recognized quarterly, which include service and interest costs, the effect of expected returns on plan assets and amortization of prior service costs/credits, from the calculation of segment operating income. GCP believes that the exclusion of certain corporate costs and pension costs provides a better indicator of its operating segment performance as such costs are not managed at an operating segment level. Operating Segment Data Three Months Ended March 31, (In millions) 2017 2016 Net Sales Specialty Construction Chemicals $ 134.0 $ 137.0 Specialty Building Materials 91.3 100.7 Total $ 225.3 $ 237.7 Segment Operating Income Specialty Construction Chemicals segment operating income $ 8.6 $ 9.9 Specialty Building Materials segment operating income 15.2 27.8 Total segment operating income $ 23.8 $ 37.7 Reconciliation of Operating Segment Data to Financial Statements Total segment operating income for the three months ended March 31, 2017 and 2016 , is reconciled below to "(Loss) income from continuing operations before income taxes" presented in the accompanying Consolidated Statements of Operations: Three Months Ended March 31, (In millions) 2017 2016 Total segment operating income $ 23.8 $ 37.7 Corporate costs (1) (10.2 ) (7.7 ) Certain pension costs (2.6 ) (1.9 ) Repositioning expenses (2.0 ) (4.3 ) Restructuring expenses (1.1 ) (0.9 ) Pension MTM adjustment and other related costs, net — (2.7 ) Third-party acquisition-related costs (0.4 ) — Amortization of acquired inventory fair value adjustment (1.5 ) — Tax indemnification adjustments (2.4 ) — Net income attributable to noncontrolling interests — 0.4 Interest expense, net (17.0 ) (12.5 ) (Loss) income from continuing operations before income taxes $ (13.4 ) $ 8.1 _______________________________ (1) Corporate costs include approximately $3.0 million and $1.6 million of allocated costs in the three months ended March 31, 2017 and 2016, respectively, that were previously reported within the Darex operating segment. Such costs did not qualify to be reclassified to discontinued operations. Geographic Area Data The table below presents information related to the geographic areas in which GCP operates. Sales are attributed to geographic areas based on customer location. Three Months Ended March 31, (In millions) 2017 2016 Net Sales United States $ 106.8 $ 106.0 Canada and Puerto Rico 5.1 6.6 Total North America 111.9 112.6 Europe Middle East Africa 45.5 55.1 Asia Pacific 51.2 54.9 Latin America 16.7 15.1 Total $ 225.3 $ 237.7

Discontinued Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations As discussed in Note 1, on March 2, 2017, the Company entered into the Offer Letter with Henkel, pursuant to which Henkel made a binding offer (the "Offer") to acquire Darex for approximately $1.05 billion , subject to working capital and certain other adjustments. Pursuant to the terms of the Offer Letter, following the conclusion of statutory employee consultation processes in connection with the Acquisition by the relevant works councils in France, the Company accepted Henkel’s offer and countersigned the Purchase Agreement with respect to the Acquisition, which was previously executed by Henkel, on April 28, 2017. Completion of the Acquisition remains subject to the satisfaction or waiver of customary closing conditions, including regulatory approvals. The Company has received antitrust clearances in the United States, Germany, Brazil, Russia and Austria and has filed for antitrust clearance in South Africa. The Acquisition is expected to close in the middle of 2017. In accordance with applicable accounting guidance for the disposal of long-lived assets, Darex met the criteria to be classified as held for sale in the first quarter of 2017. As such, the assets and liabilities related to Darex have been reclassified and reflected as "held for sale" on the Consolidated Balance Sheets for all periods presented. Additionally, Darex has been reclassified and reflected as "discontinued operations" on the Consolidated Statements of Operations and Consolidated Statements of Cash Flows for all periods presented. In connection with the Offer, the Company and Henkel also entered into a Transition Services Agreement pursuant to which Henkel and the Company will provide various services to each other in connection with the transition of the Darex business to Henkel. These services are expected to be performed for various periods up to 24 months following the closing date and include real estate, information technology, accounts payable, payroll, and other financial functions and administrative services. The agreed upon charges for such services will be generally intended to allow the servicing party to recover all out-of-pocket costs and expenses of providing such services. Additionally, in connection with the Offer, the Company and Henkel entered into a Master Tolling Agreement, whereby Henkel will operate certain equipment at facilities being sold to manufacture and prepare for shipping certain products related to product lines that will continue to be owned by the Company. These services are expected to be provided for a period of 24 months following the closing date, which can be further extended at that time. "Income from discontinued operations, net of income taxes" in the accompanying Statements of Operations is comprised of the following: Three Months Ended March 31, (In millions) 2017 2016 Net sales $ 71.8 $ 76.4 Cost of goods sold 45.2 48.4 Selling, general and administrative expenses 14.8 7.9 Research and development expenses 1.1 1.2 Other non-operating income, net 0.8 1.2 Provision for income taxes (1.8 ) (5.9 ) Income from discontinued operations, net of income taxes $ 8.1 $ 11.8 The carrying amounts of the major classes of assets and liabilities of Darex classified as "held for sale" as of March 31, 2017 and December 31, 2016 consist of the following: (In millions) March 31, 2017 December 31, 2016 Cash and cash equivalents $ 22.3 $ 17.2 Trade accounts receivable 48.1 50.5 Inventories 38.7 32.3 Other current assets 9.2 8.9 Current assets held for sale 118.3 108.9 Properties and equipment, net 41.0 40.0 Goodwill 4.7 4.4 Technology and other intangible assets, net 0.4 0.4 Deferred income taxes 7.9 6.4 Other assets 4.6 4.6 Noncurrent assets held for sale 58.6 55.8 Accounts payable 33.3 27.2 Other current liabilities 19.4 21.5 Current liabilities held for sale 52.7 48.7 Deferred income taxes 2.4 2.3 Underfunded and unfunded defined benefit pension plans 15.6 14.8 Other liabilities 3.5 3.8 Noncurrent liabilities held for sale $ 21.5 $ 20.9

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On May 8, 2017, GCP announced that it has signed a definitive agreement to acquire U.K.-based Stirling Lloyd for approximately $94 million in cash. The Company expects to fund the acquisition, in part, by drawing on its available credit facilities. Stirling Lloyd is a supplier of high-performance liquid waterproofing and coatings products with annual net sales of approximately $40 million . The Company expects to complete the transaction, which is subject to local regulatory approvals, in the second quarter of 2017. On May 3, 2017, the Board of Directors approved an amendment to the Company's U.S. Salaried Pension Plan that closes the plan to new hires effective January 1, 2018 and freezes the accrual of plan benefits for all plan participants as of December 31, 2022. Management expects to recognize in 2017 a curtailment gain in the range of $4 million to $6 million as a result of this plan amendment.

Basis of Presentation and Sum23

Basis of Presentation and Summary of Significant Accounting and Financial Reporting Policies (Policies)	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying Consolidated Financial Statements are presented on a consolidated basis and include all of the accounts and operations of GCP and its majority-owned subsidiaries. The financial statements reflect the financial position, results of operations and cash flows of GCP in accordance with generally accepted accounting principles in the United States of America ("GAAP") and with the instructions to Form 10-Q and Article 10 of SEC Regulation S-X for interim financial information.
Principles of Combination	The interim financial statements presented herein are unaudited and should be read in conjunction with the Consolidated Financial Statements presented in the Company's 2016 Annual Report on Form 10-K. Such financial statements reflect all adjustments that, in the opinion of management, are necessary for a fair statement of the results of the interim periods presented; all such adjustments are of a normal recurring nature except for the impacts of adopting new accounting standards as discussed below. All significant intercompany accounts and transactions have been eliminated. The results of operations for the three-month period ended March 31, 2017 are not necessarily indicative of the results of operations for the year ending December 31, 2017 .
Discontinued Operations	Discontinued Operations As noted above, on March 2, 2017, the Company entered into a final, binding and irrevocable offer letter (the "Offer Letter") with Henkel, pursuant to which Henkel made a binding offer to acquire Darex for approximately $1.05 billion (the "Acquisition"). Pursuant to the terms of the Offer Letter, following the conclusion of statutory employee consultation processes in connection with the Acquisition by the relevant works councils in France, the Company accepted Henkel’s offer and countersigned the Stock and Asset Purchase Agreement (the “Purchase Agreement”) with respect to the Acquisition on April 28, 2017. The Purchase Agreement was previously executed by Henkel. Completion of the Acquisition remains subject to the satisfaction or waiver of customary closing conditions, including regulatory approvals. In conjunction with this transaction and applicable GAAP, the assets and liabilities related to Darex have been reclassified and reflected as "held for sale" on the Consolidated Balance Sheets for all periods presented. Additionally, Darex has been reclassified and reflected as "discontinued operations" on the Consolidated Statements of Operations and Consolidated Statements of Cash Flows for all periods presented. Unless otherwise noted, the information throughout the Notes to the Consolidated Financial Statements pertains only to the continuing operations of GCP. Refer to Note 14 for further discussion of the Acquisition.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements, and the reported amounts of revenues and expenses for the periods presented. Actual amounts could differ from those estimates, and the differences could be material. Changes in estimates are recorded in the period identified. GCP's accounting measurements that are most affected by management's estimates of future events are: • Contingent liabilities, which depend on an assessment of the probability of loss and an estimate of ultimate resolution cost, that may arise from circumstances such as legal disputes, environmental remediation, product liability claims, material commitments (refer to Note 7 to the Consolidated Financial Statements) and income taxes (refer to Note 4 to the Consolidated Financial Statements); • Pension and postretirement liabilities that depend on assumptions regarding participant life spans, future inflation, discount rates and total returns on invested funds (refer to Note 5 to the Consolidated Financial Statements); and • Realization values of net deferred tax assets, which depend on projections of future taxable income (refer to Note 4 to the Consolidated Financial Statements).
Reclassifications	Reclassifications Certain amounts in prior period financial statements have been reclassified to conform to the current period presentation. Such reclassifications have not materially affected previously reported amounts.
Income Tax	Income Tax As a global enterprise, GCP is subject to a complex array of tax regulations and must make assessments of applicable tax law and judgments in estimating its ultimate income tax liability. Refer to Note 4 for details regarding estimates used in accounting for income tax matters including unrecognized tax benefits.
Stock-Based Compensation Expense	Stock-Based Compensation Expense Prior to the Separation, GCP was allocated stock-based compensation expense from Grace related to GCP employees receiving awards denominated in Grace equity instruments. In accordance with an employee matters agreement entered into between Grace and GCP on January 27, 2016 in connection with the Separation (the "Employee Matters Agreement"), previously outstanding stock-based compensation awards granted under Grace's equity compensation programs prior to the Separation and held by certain executives and employees of GCP and Grace were adjusted to reflect the impact of the Separation on these awards. To preserve the aggregate intrinsic value of these stock-based compensation awards, as measured immediately before and immediately after the Separation, each holder of Grace stock-based compensation awards generally received an adjusted award consisting of either (i) both a stock-based compensation award denominated in Grace equity as it existed subsequent to the Separation and a stock-based compensation award denominated in GCP equity or (ii) solely a stock-based compensation award denominated in the equity of the company at which the person was employed following the Separation. In the Separation, the determination as to which type of adjustment applied to a holder’s previously outstanding Grace award was based upon the type of stock-based compensation award that was to be adjusted and the date on which the award was originally granted under the Grace equity compensation programs prior to the Separation. Under the Employee Matters Agreement, GCP retains certain obligations related to all stock- and cash-settled stock-based compensation awards denominated in GCP equity, regardless of whether the holder is a GCP or Grace employee. Following the Separation, the Company records stock-based compensation expense for equity awards in accordance with authoritative accounting guidance.
Currency Translation	Currency Translation Assets and liabilities of foreign subsidiaries (other than those located in countries with highly inflationary economies) are translated into U.S. dollars at current exchange rates, while revenues, costs and expenses are translated at average exchange rates during each reporting period. The resulting currency translation adjustments are included in accumulated other comprehensive loss in the Consolidated Balance Sheets. The financial statements of any subsidiaries located in countries with highly inflationary economies are remeasured as if the functional currency were the U.S. dollar; the remeasurement creates translation adjustments that are reflected in net income in the Consolidated Statements of Operations. Effective January 1, 2010, GCP began to treat Venezuela as a highly inflationary economy. As a result, the functional currency of its Venezuelan subsidiary became the U.S. dollar; therefore, all translation adjustments are reflected in net income in the accompanying Consolidated Statements of Operations. Effective September 30, 2015, the Company began accounting for its results in Venezuela at the SIMADI rate. In mid-February 2016, changes to the currency exchange systems were announced that eliminated the SICAD exchange rate and replaced the name SIMADI rate with DICOM.
Recently Issued/Adopted Accounting Standards	Recently Issued Accounting Standards Business Combinations In January 2017, the FASB issued Accounting Standards Update ("ASU") 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business , which clarifies the definition of a business when evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The update provides that when substantially all the fair value of the assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets, the transaction does not involve a business. The standard is effective for the Company on January 1, 2018, with early application permitted for certain transactions. GCP will consider the provisions of this update in conjunction with qualifying transactions in periods subsequent to March 31, 2017, as applicable. Goodwill In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350) . This ASU modifies the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value, which eliminates Step 2 from the goodwill impairment test. The standard is effective for the Company for annual or any interim goodwill impairment tests beginning on or after January 1, 2020. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Revenue from Contracts with Customers In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) . This update is intended to remove inconsistencies and weaknesses in revenue requirements; provide a more robust framework for addressing revenue issues; improve comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets; provide more useful information to users of financial statements through improved disclosure requirements; and simplify the preparation of financial statements by reducing the number of requirements to which an entity must refer. The new requirements were to be effective for fiscal years beginning after December 15, 2016, and for interim periods within those fiscal years, with early adoption not permitted. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers-Deferral of the Effective Date , deferring the effective date by one year but permitting adoption as of the original effective date. The revised standard allows for two methods of adoption: (a) full retrospective adoption, meaning the standard is applied to all periods presented, or (b) modified retrospective adoption, meaning the cumulative effect of applying the new standard is recognized as an adjustment to the opening retained earnings balance. The standard will be effective for the Company on January 1, 2018. In addition to the expanded disclosures regarding revenue, this guidance may impact timing of revenue recognition in some arrangements with variable consideration or contracts for the sale of goods and services. GCP is currently evaluating the available transition methods and the potential impact of the standard on its Consolidated Financial Statements and related disclosures. Specifically, management has established a mutli-disciplinary project team to evaluate and implement Topic 606, and the project team is currently collecting information from key organizational stakeholders to identify revenue streams for focused individual contract analysis. Leases In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , which is intended to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The core principle of Topic 842 is that a lessee should recognize the assets and liabilities that arise from leases. A lessee should recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term, including optional payments where they are reasonably certain to occur. The amendments in this update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. GCP is currently evaluating the potential impact on its Consolidated Financial Statements and related disclosures. Other new pronouncements issued but not effective until after March 31, 2017 are not expected to have a material impact on the Company's financial position, results of operations or liquidity. Recently Adopted Accounting Standards Pension and Other Postretirement Benefit Costs In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715) : Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, which changes certain presentation and disclosure requirements for employers that sponsor defined benefit pension and other postretirement benefit plans. The amendments in this ASU require entities to (1) report the service cost component of net periodic pension/postretirement benefit cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period; (2) capitalize only the service cost component of net periodic pension/postretirement benefit cost (when applicable); and (3) present other components of net periodic pension/postretirement benefit cost separately from the service cost component and outside a subtotal of income from operations (if applicable). The standard is effective for the Company on January 1, 2018, with early adoption permitted as of January 1, 2017. GCP elected to early adopt this standard in the first quarter of 2017 and has reflected only the service cost component of net periodic pension/postretirement benefit cost in "Cost of goods sold" and presented the other components of net periodic pension/postretirement benefit cost in "Other (income) expense, net," within the Consolidated Statements of Operations. In accordance with the standard, GCP utilized prior period footnote disclosures as a practical expedient to apply these retrospective presentation requirements and will prospectively apply the capitalization requirements. GCP's adoption of this standard did not have a material effect on the accompanying Consolidated Financial Statements. Inventory In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory . The update requires that inventory be measured at the lower of cost or net realizable value for entities using first-in, first-out ("FIFO") or average cost methods. The new requirements are effective for fiscal years beginning after December 15, 2016, and for interim periods within those fiscal years, with early adoption permitted. GCP adopted this standard for the 2017 first quarter and there were no material effects on the accompanying Consolidated Financial Statements.

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2017
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories presented on GCP's Consolidated Balance Sheets consisted of the following: (In millions) March 31, December 31, Raw materials $ 35.9 $ 35.7 In process 3.4 3.6 Finished products and other 62.0 50.0 Total inventories $ 101.3 $ 89.3

Debt and Other Financial Inst25

Debt and Other Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Components of Debt	Components of Debt (In millions) March 31, December 31, 9.5% Senior Notes due 2023, net of unamortized debt issuance costs of $7.1 at March 31, 2017 (2016 — $7.3) $ 517.9 $ 517.7 Term Loan due 2022, net of unamortized discount of $2.3 and unamortized debt issuance costs of $4.1 at March 31, 2017 (1) (2016 — $2.4, $4.3) 265.9 266.2 Revolving credit facility due 2021 (2) 15.0 25.0 Other borrowings (3) 21.8 22.0 Total debt 820.6 830.9 Less debt payable within one year 37.9 47.9 Debt payable after one year $ 782.7 $ 783.0 Weighted average interest rates on total debt 7.7 % 7.5 % __________________________ (1) Interest at LIBOR + 325 bps with a 75 bps LIBOR floor at March 31, 2017 . (2) Interest at LIBOR +200 bps at March 31, 2017 . (3) Represents borrowings under various lines of credit and other borrowings, primarily by non-U.S. subsidiaries.
Principal Maturities of Debt Outstanding	The principal maturities of debt outstanding (net of unamortized discounts and debt issuance costs) at March 31, 2017 , were as follows: (In millions) 2017 $ 37.1 2018 3.4 2019 3.4 2020 3.4 2021 2.8 Thereafter 770.5 Total debt $ 820.6
Carrying Amounts and Fair Values of Debt Instruments	At March 31, 2017 , the carrying amounts and fair values of GCP's debt were as follows: March 31, 2017 December 31, 2016 (In millions) Carrying Amount Fair Value Carrying Amount Fair Value 9.5% Senior Notes due 2023 $ 517.9 $ 595.7 $ 517.7 $ 603.1 Term Loan due 2022 265.9 268.9 266.2 274.6 Revolving credit facility due 2021 15.0 15.0 25.0 25.0 Other borrowings 21.8 21.8 22.0 22.0 Total debt $ 820.6 $ 901.4 $ 830.9 $ 924.7

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	The difference between the provision for income taxes at the U.S. federal income tax rate of 35% and GCP’s overall income tax rate is summarized below. Three Months Ended March 31, (In millions) 2017 2016 Tax provision at U.S. federal income tax rate $ (4.7 ) $ 2.8 Change in provision resulting from: Valuation allowance 13.8 — Tax on undistributed foreign earnings 1.9 — Effect of tax rates in foreign jurisdictions 0.7 (0.6 ) Permanent items and other (0.1 ) (0.5 ) Provision for income taxes $ 11.6 $ 1.7

Pension Plans and Other Postr27

Pension Plans and Other Postretirement Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2017
Pension and Other Postretirement Benefit Expense [Abstract]
Net Funded Status of Over-Funded, Underfunded, and Unfunded Pension Plans	The following table presents the funded status of GCP's overfunded, underfunded and unfunded defined pension plans from continuing operations: (In millions) March 31, December 31, Overfunded defined benefit pension plans $ 22.0 $ 21.2 Underfunded defined benefit pension plans (57.7 ) (55.6 ) Unfunded defined benefit pension plans (28.5 ) (27.6 ) Total underfunded and unfunded defined benefit pension plans (86.2 ) (83.2 ) Pension liabilities included in other current liabilities (0.5 ) (0.4 ) Net funded status $ (64.7 ) $ (62.4 )
Components of Net Periodic Benefit Cost (Income)	Components of Net Periodic Benefit Cost (Income) Three Months Ended March 31, 2017 2016 Pension Other Post Pension Other Post (In millions) U.S. Non-U.S. U.S. Non-U.S. Service cost $ 1.9 $ 1.0 $ — $ 1.5 $ 0.9 $ — Interest cost 1.5 1.5 — 1.2 2.1 — Expected return on plan assets (1.4 ) (1.7 ) — (1.2 ) (2.3 ) — Amortization of prior service credit — — — — — (0.1 ) Net periodic benefit cost (income) (1) $ 2.0 $ 0.8 $ — $ 1.5 $ 0.7 $ (0.1 ) Less: Discontinued operations — 0.2 — — 0.3 — Net periodic benefit cost (income) from continuing operations $ 2.0 $ 0.6 $ — $ 1.5 $ 0.4 $ (0.1 ) _______________________________ (1) Includes expense that was allocated to Grace of $0.1 million for the three months ended March 31, 2016 .

Other Balance Sheet Accounts (T

Other Balance Sheet Accounts (Tables)	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Other Current Assets	(In millions) March 31, December 31, Other Current Assets: Non-trade receivables $ 19.0 $ 19.9 Income tax receivable 18.0 10.6 Prepaid and other 16.1 12.4 Total other current assets $ 53.1 $ 42.9
Schedule of Other Current Liabilities	(In millions) March 31, December 31, Other Current Liabilities Customer volume rebates $ 21.7 $ 30.5 Accrued compensation (1) 20.0 28.0 Income tax payable 5.3 6.7 Accrued interest 8.3 20.8 Pension liabilities 0.5 0.4 Other accrued liabilities 41.1 33.1 Total other current liabilities $ 96.9 $ 119.5 ________________________________ (1) Accrued compensation in the table above includes salaries and wages as well as estimated current amounts due under the annual and long-term incentive programs.

Restructuring and Repositioni29

Restructuring and Repositioning Expenses (Tables)	3 Months Ended
	Mar. 31, 2017
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Liability	Restructuring Liability (In millions) Total Balance, December 31, 2016 $ 1.1 Accruals for severance 0.8 Payments (0.3 ) Balance, March 31, 2017 $ 1.6
Schedule of Repositioning Expenses	For the three months ended March 31, 2017 , GCP incurred repositioning expenses as follows: Three Months Ended March 31, (In millions) 2017 2016 Professional fees $ 1.4 $ 2.1 Software and IT implementation fees 0.3 — Employee-related costs 0.3 2.2 Total $ 2.0 $ 4.3

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Schedule of Pre-tax, Tax, and After-tax Components of Other Comprehensive Income (Loss)	The following tables present the pre-tax, tax and after-tax components of GCP's other comprehensive income for the three months ended March 31, 2017 and 2016 : Three Months Ended March 31, 2017 (In millions) Pre-Tax Amount Tax (Expense)/ Benefit After-Tax Amount Currency translation adjustments $ 12.6 — $ 12.6 Other comprehensive income attributable to GCP shareholders $ 12.6 $ — $ 12.6 Three Months Ended March 31, 2016 (In millions) Pre-Tax Amount Tax (Expense)/ Benefit After-Tax Amount Defined benefit pension and other postretirement plans: Amortization of net prior service cost included in net periodic benefit cost $ (0.1 ) $ — $ (0.1 ) Assumption of net prior service credit 1.2 (0.4 ) 0.8 Assumption of net actuarial loss (1.1 ) 0.4 (0.7 ) Benefit plans, net — — — Currency translation adjustments 3.9 — 3.9 Loss from hedging activities (0.2 ) — (0.2 ) Other comprehensive income attributable to GCP shareholders $ 3.7 $ — $ 3.7
Schedule of Changes of Accumulated Other Comprehensive Income (Loss), Net of Tax	The following tables present the changes in accumulated other comprehensive income (loss), net of tax, for the three months ended March 31, 2017 and 2016 : Three Months Ended March 31, 2017 (In millions) Defined Benefit Pension and Other Postretirement Plans Currency Translation Adjustments Gains (Losses) from Hedging Activities Total Beginning balance $ 0.1 $ (147.7 ) $ — $ (147.6 ) Other comprehensive income before reclassifications — 12.6 0.1 12.7 Amounts reclassified from accumulated other comprehensive income — — (0.1 ) (0.1 ) Net current-period other comprehensive income — 12.6 — 12.6 Ending balance $ 0.1 $ (135.1 ) $ — $ (135.0 ) Three Months Ended March 31, 2016 (In millions) Defined Benefit Pension and Other Postretirement Plans Currency Translation Adjustments Gains (Losses) from Hedging Activities Total Beginning balance $ 0.1 $ (127.8 ) $ — $ (127.7 ) Other comprehensive income (loss) before reclassifications 0.1 3.9 (0.5 ) 3.5 Amounts reclassified from accumulated other comprehensive income (loss) (0.1 ) — 0.3 0.2 Net current-period other comprehensive income (loss) — 3.9 (0.2 ) 3.7 Ending balance $ 0.1 $ (123.9 ) $ (0.2 ) $ (124.0 )

Stock Incentive Plans (Tables)

Stock Incentive Plans (Tables)	3 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Assumptions for Estimating the Fair Value of Stock Options	The following summarizes GCP's assumptions for estimating the fair value of stock options granted during 2017 : Assumptions used to calculate expense for stock option Three Months Ended March 31, 2017 Risk-free interest rate 1.95 - 2.10% Average life of options (years) 5.5 - 6.5 Volatility 31.42 - 31.96% Dividend yield — Average fair value per stock option $9.13
Summary of Stock Option Activity	The following table summarizes GCP stock option activity for the three months ended March 31, 2017 : Stock Option Activity Number Of Weighted Weighted Aggregated Outstanding, December 31, 2016 2,122 $ 16.92 3.57 $ 20,748 Options exercised 325 12.73 Options forfeited/expired/canceled 4 18.79 Options granted 235 26.40 Outstanding, March 31, 2017 2,028 18.69 4.07 28,863 Exercisable March 31, 2017 814 $ 17.05 2.89 $ 5,776
Summary of Restricted Stock Units Award Activity	GCP’s RSU activity for the three months ended March 31, 2017 is as follows: RSU Activity Number Of Weighted Outstanding, December 31, 2016 538 $ 17.22 RSUs settled 112 17.17 RSUs forfeited 1 16.90 RSUs granted 93 26.34 RSUs outstanding, March 31, 2017 518 $ 18.86
Schedule of Restricted Stock Units Vesting and Settlements	GCP's expectations of future RSU vesting and settlement are as follows: Year Number of Shares Vesting (in thousands) Settled in Cash Settled in Stock 2017 31 —% 100% 2018 197 10% 90% 2019 262 —% 100% 2020 28 —% 100%

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Reconciliation of the Numerators and Denominators Used in Calculating Basic and Diluted Earnings Per Share	The following table shows a reconciliation of the numerators and denominators used in calculating basic and diluted (loss) earnings per share: Three Months Ended March 31, (In millions, except per share amounts) 2017 2016 Numerators Net (loss) income from continuing operations attributable to GCP shareholders $ (25.0 ) $ 6.0 Income from discontinued operations, net of income taxes $ 8.1 $ 11.8 Net (loss) income attributable to GCP shareholders $ (16.9 ) $ 17.8 Denominators Weighted average common shares—basic calculation 71.2 70.6 Dilutive effect of employee stock awards — 0.3 Weighted average common shares—diluted calculation 71.2 70.9 Basic (loss) earnings per share Net (loss) income from continuing operations attributable to GCP shareholders $ (0.35 ) $ 0.08 Income from discontinued operations, net of income taxes $ 0.11 $ 0.17 Net (loss) income attributable to GCP shareholders $ (0.24 ) $ 0.25 Diluted (loss) earnings per share Net (loss) income from continuing operations attributable to GCP shareholders $ (0.35 ) $ 0.08 Income from discontinued operations, net of income taxes $ 0.11 $ 0.17 Net (loss) income attributable to GCP shareholders $ (0.24 ) $ 0.25

Related Party Transactions an33

Related Party Transactions and Transactions with Grace (Tables)	3 Months Ended
	Mar. 31, 2017
Related Party Transactions [Abstract]
Components of Net Transfers to Parent	The components of the net transfers to parent as of March 31, 2016 are as follows: (In millions) 2016 Cash pooling and general financing activities $ (690.8 ) GCP expenses funded by parent 6.6 Corporate costs allocations 2.0 Provision for income taxes 4.3 Total net transfers to parent (677.9 ) Other, net (80.8 ) Transfers to parent, net, per Consolidated Statement of Cash Flows $ (758.7 )

Operating Segment Information (

Operating Segment Information (Tables)	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Schedule of Operating Segment Data	Operating Segment Data Three Months Ended March 31, (In millions) 2017 2016 Net Sales Specialty Construction Chemicals $ 134.0 $ 137.0 Specialty Building Materials 91.3 100.7 Total $ 225.3 $ 237.7 Segment Operating Income Specialty Construction Chemicals segment operating income $ 8.6 $ 9.9 Specialty Building Materials segment operating income 15.2 27.8 Total segment operating income $ 23.8 $ 37.7
Reconciliation of Operating Segment Data to Financial Statements	Total segment operating income for the three months ended March 31, 2017 and 2016 , is reconciled below to "(Loss) income from continuing operations before income taxes" presented in the accompanying Consolidated Statements of Operations: Three Months Ended March 31, (In millions) 2017 2016 Total segment operating income $ 23.8 $ 37.7 Corporate costs (1) (10.2 ) (7.7 ) Certain pension costs (2.6 ) (1.9 ) Repositioning expenses (2.0 ) (4.3 ) Restructuring expenses (1.1 ) (0.9 ) Pension MTM adjustment and other related costs, net — (2.7 ) Third-party acquisition-related costs (0.4 ) — Amortization of acquired inventory fair value adjustment (1.5 ) — Tax indemnification adjustments (2.4 ) — Net income attributable to noncontrolling interests — 0.4 Interest expense, net (17.0 ) (12.5 ) (Loss) income from continuing operations before income taxes $ (13.4 ) $ 8.1 _______________________________ (1) Corporate costs include approximately $3.0 million and $1.6 million of allocated costs in the three months ended March 31, 2017 and 2016, respectively, that were previously reported within the Darex operating segment. Such costs did not qualify to be reclassified to discontinued operations.
Schedule of Geographic Area Data	The table below presents information related to the geographic areas in which GCP operates. Sales are attributed to geographic areas based on customer location. Three Months Ended March 31, (In millions) 2017 2016 Net Sales United States $ 106.8 $ 106.0 Canada and Puerto Rico 5.1 6.6 Total North America 111.9 112.6 Europe Middle East Africa 45.5 55.1 Asia Pacific 51.2 54.9 Latin America 16.7 15.1 Total $ 225.3 $ 237.7

Discontinued Operations (Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Financial Results and Other Effects Related to Discontinued Operations	"Income from discontinued operations, net of income taxes" in the accompanying Statements of Operations is comprised of the following: Three Months Ended March 31, (In millions) 2017 2016 Net sales $ 71.8 $ 76.4 Cost of goods sold 45.2 48.4 Selling, general and administrative expenses 14.8 7.9 Research and development expenses 1.1 1.2 Other non-operating income, net 0.8 1.2 Provision for income taxes (1.8 ) (5.9 ) Income from discontinued operations, net of income taxes $ 8.1 $ 11.8 The carrying amounts of the major classes of assets and liabilities of Darex classified as "held for sale" as of March 31, 2017 and December 31, 2016 consist of the following: (In millions) March 31, 2017 December 31, 2016 Cash and cash equivalents $ 22.3 $ 17.2 Trade accounts receivable 48.1 50.5 Inventories 38.7 32.3 Other current assets 9.2 8.9 Current assets held for sale 118.3 108.9 Properties and equipment, net 41.0 40.0 Goodwill 4.7 4.4 Technology and other intangible assets, net 0.4 0.4 Deferred income taxes 7.9 6.4 Other assets 4.6 4.6 Noncurrent assets held for sale 58.6 55.8 Accounts payable 33.3 27.2 Other current liabilities 19.4 21.5 Current liabilities held for sale 52.7 48.7 Deferred income taxes 2.4 2.3 Underfunded and unfunded defined benefit pension plans 15.6 14.8 Other liabilities 3.5 3.8 Noncurrent liabilities held for sale $ 21.5 $ 20.9

Basis of Presentation and Sum36

Basis of Presentation and Summary of Significant Accounting and Financial Reporting Policies - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017segment	Mar. 02, 2017USD ($)
Class of Stock [Line Items]
Number of operating segments | segment	2
Held-for-sale | Darex
Class of Stock [Line Items]
Consideration to be received | $		$ 1,050

Basis of Presentation and Sum37

Basis of Presentation and Summary of Significant Accounting and Financial Reporting Policies - Currency Translation (Details) VEF in Millions	3 Months Ended
	Mar. 31, 2017VEFVEB / $
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Foreign currency exchange rate, translation | VEB / $	708,000,000
Increase in currency exchange rate, in percentage	4.90%
Venezuela | Bolivar
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Assets held for sale	VEF 8.7
Held for Sale Assets and Held for Sale Liabilities | Venezuela | Bolivar
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Assets held for sale	VEF 5

Inventories - Schedule of Inven

Inventories - Schedule of Inventory (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 35.9	$ 35.7
In process	3.4	3.6
Finished products and other	62	50
Total inventories	$ 101.3	$ 89.3

Inventories - Narrative (Detail

Inventories - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Inventory [Line Items]
Finished products purchased	$ 62	$ 50
Finished Products Purchased
Inventory [Line Items]
Finished products purchased	$ 12.7	$ 10.9

Debt and Other Financial Inst40

Debt and Other Financial Instruments - Components of Debt (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total debt	$ 820.6	$ 830.9
Debt payable within one year	37.9	47.9
Debt payable after one year	$ 782.7	$ 783
Weighted average interest rates	7.70%	7.50%
Senior Notes
Debt Instrument [Line Items]
Total debt	$ 517.9	$ 517.7
Term Loan
Debt Instrument [Line Items]
Total debt	265.9	266.2
Line of credit
Debt Instrument [Line Items]
Total debt	21.8	22
Other borrowings
Debt Instrument [Line Items]
Total debt			$ 42
Revolving Credit | Line of credit
Debt Instrument [Line Items]
Total debt	$ 15	$ 25

Debt and Other Financial Inst41

Debt and Other Financial Instruments - Components of Debt (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Jan. 27, 2016
Senior Notes
Debt Instrument [Line Items]
Stated interest rate	9.50%		9.50%
Unamortized debt issuance cost	$ 7.1	$ 7.3
Term Loan
Debt Instrument [Line Items]
Unamortized debt issuance cost	4.1	4.3
Unamortized discount	$ 2.3	$ 2.4
Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%
Variable interest rate, floor	0.75%
Revolving Credit | Other Borrowings | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%

Debt and Other Financial Inst42

Debt and Other Financial Instruments - Principal Maturities of Debt Outstanding (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
2,017	$ 37.1
2,018	3.4
2,019	3.4
2,020	3.4
2,021	2.8
Thereafter	770.5
Total debt	$ 820.6	$ 830.9

Debt and Other Financial Inst43

Debt and Other Financial Instruments - Narrative (Details) - USD ($)	Mar. 02, 2017	Feb. 03, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Jan. 27, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Distribution to Grace related to the Separation				$ 750,000,000
Debt proceeds retained to meet operating requirements and to pay fees associated with the Separation				$ 50,000,000
Long-term debt			$ 820,600,000		$ 830,900,000
Term Loan
Debt Instrument [Line Items]
Long-term debt			$ 265,900,000		266,200,000
Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			3.25%
Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount						$ 525,000,000
Stated interest rate			9.50%			9.50%
Debt issuance costs, gross					8,000,000
Long-term debt			$ 517,900,000		517,700,000
Related Party
Debt Instrument [Line Items]
Long-term debt							$ 42,000,000
Secured Debt | Term Loan
Debt Instrument [Line Items]
Debt issuance costs, gross					5,000,000
Secured Debt | Revolving Credit
Debt Instrument [Line Items]
Outstanding letters of credit			9,000,000
Line of credit debt issuance costs, gross					5,200,000
Line of credit, unamortized debt issuance costs			4,000,000		$ 4,200,000
Darex | Held-for-sale
Debt Instrument [Line Items]
Consideration to be received	$ 1,050,000,000
Required period for prepayment of debt or investment in Company using net proceeds from sale	18 months
Credit Agreement | United States
Debt Instrument [Line Items]
Pledged equity to credit facilities, percentage		100.00%
Credit Agreement | United Kingdom
Debt Instrument [Line Items]
Pledged equity to credit facilities, percentage		65.00%
Credit Agreement | Secured Debt
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 525,000,000
Credit Agreement | Secured Debt | Term Loan
Debt Instrument [Line Items]
Aggregate principal amount		$ 275,000,000
Annual amortization of debt, as percentage of original amount		1.00%
Credit Agreement | Secured Debt | Term Loan | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					3.50%
Credit Agreement | Secured Debt | Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate					4.50%
Credit Agreement | Secured Debt | Revolving Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 250,000,000
Amended Credit Agreement | Secured Debt | Term Loan | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					2.25%
Amended Credit Agreement | Secured Debt | Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate					3.25%
Amended Credit Agreement | Secured Debt | Revolving Credit
Debt Instrument [Line Items]
Outstanding draw on revolving loans			15,000,000		$ 25,000,000
Available credit under revolving loans			$ 226,000,000
Amended Credit Agreement | Secured Debt | Revolving Credit | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate			0.50%
Amended Credit Agreement | Secured Debt | Revolving Credit | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate			1.00%
Amended Credit Agreement | Secured Debt | Revolving Credit | LIBOR | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate			1.50%
Amended Credit Agreement | Secured Debt | Revolving Credit | LIBOR | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate			2.00%

Debt and Other Financial Inst44

Debt and Other Financial Instruments - Carrying Amounts and Fair Values of Debt Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016	Jan. 27, 2016
Senior Notes
Debt Instrument [Line Items]
Stated interest rate	9.50%		9.50%
Carrying Amount
Debt Instrument [Line Items]
Fair Value	$ 820.6	$ 830.9
Carrying Amount | Senior Notes
Debt Instrument [Line Items]
Fair Value	517.9	517.7
Carrying Amount | Term Loan
Debt Instrument [Line Items]
Fair Value	265.9	266.2
Carrying Amount | Other Borrowings
Debt Instrument [Line Items]
Fair Value	21.8	22
Carrying Amount | Revolving Credit | Other Borrowings
Debt Instrument [Line Items]
Fair Value	15	25
Fair Value | Level 2 Inputs
Debt Instrument [Line Items]
Fair Value	901.4	924.7
Fair Value | Senior Notes | Level 2 Inputs
Debt Instrument [Line Items]
Fair Value	595.7	603.1
Fair Value | Term Loan | Level 2 Inputs
Debt Instrument [Line Items]
Fair Value	268.9	274.6
Fair Value | Other Borrowings | Level 2 Inputs
Debt Instrument [Line Items]
Fair Value	21.8	22
Fair Value | Revolving Credit | Other Borrowings | Level 2 Inputs
Debt Instrument [Line Items]
Fair Value	$ 15	$ 25

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	Feb. 03, 2016	Mar. 31, 2017	Mar. 31, 2016
Operating Loss Carryforwards [Line Items]
Provision for income taxes		$ 11.6	$ 1.7
Effective tax rate		(86.60%)	21.00%
Increase in effective tax rate attributable to the recording of valuation allowances		107.60%
Federal income tax rate		35.00%
Tax on undistributed foreign earnings		$ 1.9	$ 0
Increase in deferred tax assets in the US in conjunction with the Separation	$ 74
Canada Revenue Agency
Operating Loss Carryforwards [Line Items]
Expected refund as a result of tax settlement		1.5
Charge to deferred tax assets related to settlement		1.6
MEXICO
Operating Loss Carryforwards [Line Items]
Tax on undistributed foreign earnings		1.9
Held-for-sale | Darex
Operating Loss Carryforwards [Line Items]
Provision for income taxes		1.8	$ 5.9
Valuation Allowance, Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Foreign operating loss carryforwards		4.3
Net Operating Loss Carryforwards | BRAZIL
Operating Loss Carryforwards [Line Items]
Foreign operating loss carryforwards		9.1
Net Operating Loss Carryforwards | TURKEY
Operating Loss Carryforwards [Line Items]
Foreign operating loss carryforwards		$ 0.4

Income Taxes - Tax Reconciliati

Income Taxes - Tax Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Tax provision at U.S. federal income tax rate	$ (4.7)	$ 2.8
Tax provision at U.S. federal income tax rate
Valuation allowance	13.8	0
Tax on undistributed foreign earnings	1.9	0
Effect of tax rates in foreign jurisdictions	0.7	(0.6)
Permanent items and other	(0.1)	(0.5)
Provision for income taxes	$ 11.6	$ 1.7

Pension Plans and Other Postr47

Pension Plans and Other Postretirement Benefit Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Pension plans and other postretirement benefit plans
Overfunded defined benefit pension plans	$ 22		$ 21.2
Underfunded and unfunded defined benefit pension plans	$ 86.2		83.2
Defined contribution retirement plan
Percentage that the employer contributes of employee contributions under 401(k) plan	100.00%
Maximum percentage of employee compensation match by employer to defined contribution plan	6.00%
Costs related to defined contribution retirement plan	$ 1.4	$ 1
Postretirement Life Insurance Plans
Pension plans and other postretirement benefit plans
Allocated income		$ 1.2
Pension Plans
Pension plans and other postretirement benefit plans
Overfunded defined benefit pension plans	22		21.2
Combined balance of underfunded and unfunded plans included as liabilities	86.7
Pension liabilities included in other current liabilities	0.5		0.4
Underfunded and unfunded defined benefit pension plans	$ 86.2		$ 83.2

Pension Plans and Other Postr48

Pension Plans and Other Postretirement Benefit Plans - Net Funded Status of Over-Funded, Underfunded, and Unfunded Pension Plans (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Pension plans and other postretirement benefit plans
Overfunded defined benefit pension plans	$ 22	$ 21.2
Underfunded defined benefit pension plans	(86.2)	(83.2)
Pension Plans
Pension plans and other postretirement benefit plans
Overfunded defined benefit pension plans	22	21.2
Underfunded defined benefit pension plans	(86.2)	(83.2)
Pension liabilities included in other current liabilities	(0.5)	(0.4)
Net funded status	(64.7)	(62.4)
Underfunded defined benefit pension plans | Pension Plans
Pension plans and other postretirement benefit plans
Underfunded defined benefit pension plans	(57.7)	(55.6)
Unfunded defined benefit pension plans | Pension Plans
Pension plans and other postretirement benefit plans
Underfunded defined benefit pension plans	$ (28.5)	$ (27.6)

Pension Plans and Other Postr49

Pension Plans and Other Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
W.R. Grace
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost (income)		$ 0.1
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1.9	1.5
Interest cost	1.5	1.2
Expected return on plan assets	(1.4)	(1.2)
Amortization of prior service (credit) cost	0	0
Net periodic benefit cost (income)	2	1.5
Less: Discontinued operations	0	0
Net periodic benefit cost (income) from continuing operations	2	1.5
Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1	0.9
Interest cost	1.5	2.1
Expected return on plan assets	(1.7)	(2.3)
Amortization of prior service (credit) cost	0	0
Net periodic benefit cost (income)	0.8	0.7
Less: Discontinued operations	0.2	0.3
Net periodic benefit cost (income) from continuing operations	0.6	0.4
Other Post Retirement
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0	0
Interest cost	0	0
Expected return on plan assets	0	0
Amortization of prior service (credit) cost	0	(0.1)
Net periodic benefit cost (income)	0	(0.1)
Less: Discontinued operations	0	0
Net periodic benefit cost (income) from continuing operations	$ 0	$ (0.1)

Other Balance Sheet Accounts -

Other Balance Sheet Accounts - Other Current Assets (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Other Current Assets:
Non-trade receivables	$ 19	$ 19.9
Income tax receivable	18	10.6
Prepaid and other	16.1	12.4
Total other current assets	$ 53.1	$ 42.9

Other Balance Sheet Accounts 51

Other Balance Sheet Accounts - Other Current Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Other Current Liabilities
Customer volume rebates	$ 21.7	$ 30.5
Accrued compensation	20	28
Income tax payable	5.3	6.7
Accrued interest	8.3	20.8
Pension liabilities	0.5	0.4
Other accrued liabilities	41.1	33.1
Total other current liabilities	$ 96.9	$ 119.5

Commitments and Contingent Li52

Commitments and Contingent Liabilities (Details) $ in Millions	Nov. 12, 2015defendantindividual	Mar. 31, 2017USD ($)
Loss Contingencies [Line Items]
Environmental liabilities | $		$ 0
Library Gardens Balcony Litigation, Lead Case Beary v. Blackrock, Inc. | Damages from Product Defects
Loss Contingencies [Line Items]
Number of lawsuits filed on behalf of individuals who died | individual	6
Number of injured defendants	7
Number of additional defendants	20
Number of construction company defendants	2
Amended Credit Agreement | Standby Letter of Credit
Loss Contingencies [Line Items]
Gross financial assurances issued and outstanding | $		$ 9

Restructuring and Repositioni53

Restructuring and Repositioning Expenses - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Feb. 03, 2016
Changes in Business Environment and Structure
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 1.1	$ 0.9
Restructuring liabilities	1.6		$ 1.1
Total cash payments for repositioning costs	0.3
Changes in Business Environment and Structure | Employee severance
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities	1.6		$ 1.1
Changes in Business Environment and Structure | SCC
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0.8	0.5
Changes in Business Environment and Structure | SBM
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0.3	0.4
Repositioning
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	2	$ 4.3
Repositioning | Minimum
Restructuring Cost and Reserve [Line Items]
Estimated transition expenses				$ 18
Repositioning | Maximum
Restructuring Cost and Reserve [Line Items]
Estimated transition expenses				$ 20
Repositioning | Repositioning expenses
Restructuring Cost and Reserve [Line Items]
Total cash payments for repositioning costs	1.1
Repositioning | Capital expenditures
Restructuring Cost and Reserve [Line Items]
Total cash payments for repositioning costs	$ 0.8

Restructuring and Repositioni54

Restructuring and Repositioning Expenses - Restructuring Liability (Details) - Changes in Business Environment and Structure $ in Millions	3 Months Ended
	Mar. 31, 2017USD ($)
Restructuring Liability (In millions)
Balance, December 31, 2016	$ 1.1
Accruals for severance	0.8
Payments	(0.3)
Balance, March 31, 2017	$ 1.6

Restructuring and Repositioni55

Restructuring and Repositioning Expenses (Details) - Repositioning - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 2	$ 4.3
Professional fees
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	1.4	2.1
Software and IT implementation fees
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0.3	0
Employee-related costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 0.3	$ 2.2

Other Comprehensive Income - Pr

Other Comprehensive Income - Pre-Tax, Tax, and After-Tax Components of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
After-Tax Amount
Total other comprehensive income	$ 12.6	$ 3.9
Other comprehensive income attributable to GCP shareholders
Pre-Tax Amount
Other comprehensive income (loss), pre-tax amount	12.6	3.7
Tax Benefit/ (Expense)
Other comprehensive income (loss), tax	0	0
After-Tax Amount
Amortization of net prior service cost included in net periodic benefit cost, after-tax	0.1	(0.2)
Defined benefit pension and other postretirement plans, after-tax	12.7	3.5
Total other comprehensive income	12.6	3.7
Amortization of net prior service credit
Pre-Tax Amount
Amortization of net prior service cost included in net periodic benefit cost, pre-tax amount		(0.1)
Defined benefit pension and other postretirement plans, pre-tax amount		1.2
Tax Benefit/ (Expense)
Amortization of net prior service cost included in net periodic benefit cost, tax		0
Defined benefit pension and other postretirement plans, tax		(0.4)
After-Tax Amount
Amortization of net prior service cost included in net periodic benefit cost, after-tax		(0.1)
Defined benefit pension and other postretirement plans, after-tax		0.8
Assumption of net actuarial loss
Pre-Tax Amount
Defined benefit pension and other postretirement plans, pre-tax amount		(1.1)
Tax Benefit/ (Expense)
Defined benefit pension and other postretirement plans, tax		0.4
After-Tax Amount
Defined benefit pension and other postretirement plans, after-tax		(0.7)
Benefit plans, net
Pre-Tax Amount
Other comprehensive income (loss), pre-tax amount		0
Tax Benefit/ (Expense)
Other comprehensive income (loss), tax		0
After-Tax Amount
Amortization of net prior service cost included in net periodic benefit cost, after-tax	0	0.1
Defined benefit pension and other postretirement plans, after-tax	0	0.1
Total other comprehensive income	0	0
Currency translation adjustments
Pre-Tax Amount
Other comprehensive income (loss), pre-tax amount	12.6	3.9
Tax Benefit/ (Expense)
Other comprehensive income (loss), tax	0	0
After-Tax Amount
Amortization of net prior service cost included in net periodic benefit cost, after-tax	0	0
Defined benefit pension and other postretirement plans, after-tax	12.6	3.9
Total other comprehensive income	12.6	3.9
Loss from hedging activities
Pre-Tax Amount
Other comprehensive income (loss), pre-tax amount		(0.2)
Tax Benefit/ (Expense)
Other comprehensive income (loss), tax		0
After-Tax Amount
Amortization of net prior service cost included in net periodic benefit cost, after-tax	0.1	(0.3)
Defined benefit pension and other postretirement plans, after-tax	0.1	(0.5)
Total other comprehensive income	$ 0	$ (0.2)

Other Comprehensive Income - Ch

Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017USD ($)country	Mar. 31, 2016USD ($)
Changes in accumulated other comprehensive income (loss), net of tax
Beginning balance	$ (139)	$ 474.1
Total other comprehensive income	12.6	3.9
Ending balance	$ (137.7)	(182.1)
Number of countries in which entity operates, more than | country	35
Defined Benefit Pension and Other Postretirement Plans
Changes in accumulated other comprehensive income (loss), net of tax
Beginning balance	$ 0.1	0.1
Other comprehensive income before reclassifications	0	0.1
Amounts reclassified from accumulated other comprehensive income	0	(0.1)
Total other comprehensive income	0	0
Ending balance	0.1	0.1
Currency Translation Adjustments
Changes in accumulated other comprehensive income (loss), net of tax
Beginning balance	(147.7)	(127.8)
Other comprehensive income before reclassifications	12.6	3.9
Amounts reclassified from accumulated other comprehensive income	0	0
Total other comprehensive income	12.6	3.9
Ending balance	(135.1)	(123.9)
Gains (Losses) from Hedging Activities
Changes in accumulated other comprehensive income (loss), net of tax
Beginning balance	0	0
Other comprehensive income before reclassifications	0.1	(0.5)
Amounts reclassified from accumulated other comprehensive income	(0.1)	0.3
Total other comprehensive income	0	(0.2)
Ending balance	0	(0.2)
Total
Changes in accumulated other comprehensive income (loss), net of tax
Beginning balance	(147.6)	(127.7)
Other comprehensive income before reclassifications	12.7	3.5
Amounts reclassified from accumulated other comprehensive income	(0.1)	0.2
Total other comprehensive income	12.6	3.7
Ending balance	$ (135)	$ (124)

Stock Incentive Plans - Narrati

Stock Incentive Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	Feb. 03, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Total cash and non-cash stock-based compensation cost		$ 2.7	$ 1.1
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, exercise price, percent of market value on the date of grant		100.00%
Stock option awards, contractual term		5 years
Award vesting period	3 years
Intrinsic value of all options exercised		$ 12.9
Unrecognized stock-based compensation expense for stock options		$ 3
Unrecognized stock-based compensation expense for stock options, period of recognition		1 year 2 months 12 days
Stock Option | Vesting 1, Year 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	33.33%
Stock Option | Vesting 1, Year 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	33.33%
Stock Option | Vesting 1, Year 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	33.33%
Stock Option, 7 Year Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards, contractual term	7 years
Stock Option, 10 Year Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards, contractual term	10 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Fully vested awards settled in shares		79,134
Fully vested awards settled in cash		$ 0.9
Awards granted (in shares)		93,000
Weighted average grant date fair value (in usd per share)		$ 26.34
Number of shares forfeited		1,000
Restricted Stock Units (RSUs) | Vesting 1, Year 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	33.33%
Restricted Stock Units (RSUs) | Vesting 1, Year 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	33.33%
Restricted Stock Units (RSUs) | Vesting 1, Year 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	33.33%
Restricted Stock Units (RSUs) | Vesting 2, Year 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	0.00%
Restricted Stock Units (RSUs) | Vesting 2, Year 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	0.00%
Restricted Stock Units (RSUs) | Vesting 2, Year 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	100.00%
Sign-On Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years
Award vesting percentage	100.00%
Restricted Stock Units (RSUs) and Performance Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense for stock options, period of recognition		1 year 6 months
Total unrecognized compensation expense related to the RSU and PBU awards		$ 11.7
2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares repurchased		33,000	84,000
Number of shares of common stock available for issuance		656,205
2016 Stock Incentive Plan | Performance Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)		162,328
Weighted average grant date fair value (in usd per share)		$ 26.40		$ 17.04
Percent of units expected to settle in common stock		100.00%
Number of shares forfeited		0
Performance period		3 years
2016 Stock Incentive Plan | Performance Based Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected payout, percent of target		0.00%
2016 Stock Incentive Plan | Performance Based Units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected payout, percent of target		200.00%

Stock Incentive Plans - Expense

Stock Incentive Plans - Expenses Related to Stock Options Granted, Valuation Assumptions (Details) - Stock Option	3 Months Ended
	Mar. 31, 2017$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, minimum	1.95%
Risk-free interest rate, maximum	2.10%
Volatility, minimum	31.42%
Volatility, maximum	31.96%
Dividend yield	0.00%
Average fair value per stock option (in usd per share)	$ 9.13
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average life of options (years)	5 years 6 months
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average life of options (years)	6 years 6 months

Stock Incentive Plans - Stock O

Stock Incentive Plans - Stock Option Activity (Details) - Stock Option - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Number Of Shares (in thousands)
Outstanding, beginning balance (in shares)	2,122
Options exercised (in shares)	325
Options forfeited (in shares)	4
Options granted (in shares)	235
Outstanding, end balance (in shares)	2,028	2,122
Exercisable, end of period (in shares)	814
Weighted Average Exercise Price
Outstanding, beginning balance (in usd per share)	$ 16.92
Options exercised (in usd per share)	12.73
Options forfeited (in usd per share)	18.79
Options granted (in usd per share)	26.40
Outstanding, ending balance (in usd per share)	18.69	$ 16.92
Exercisable, end of period (in usd per share)	$ 17.05
Other Disclosures
Outstanding, weighted-average remaining contractual term	4 years 26 days	3 years 6 months 26 days
Exercisable, weighted-average remaining contractual term	2 years 10 months 21 days
Outstanding, aggregated intrinsic value	$ 28,863	$ 20,748
Exercisable, aggregated intrinsic value	$ 5,776

Stock Incentive Plans - Restric

Stock Incentive Plans - Restricted Stock Units Award Activity (Details) - Restricted Stock Units (RSUs) shares in Thousands	3 Months Ended
	Mar. 31, 2017$ / sharesshares
Number Of Shares (in thousands)
Outstanding, beginning balance (in shares) | shares	538
RSUs settled (in shares) | shares	112
RSUs forfeited (in shares) | shares	1
RSUs granted (in shares) | shares	93
RSUs outstanding, ending balance (in shares) | shares	518
Weighted Average Grant Date Fair Value
Outstanding, beginning balance (in usd per share) | $ / shares	$ 17.22
RSUs settled (in usd per share) | $ / shares	17.17
RSUs forfeited (in used per share) | $ / shares	16.90
RSUs granted (in usd per share) | $ / shares	26.34
RSUs outstanding, ending balance (in usd per share) | $ / shares	$ 18.86

Stock Incentive Plans - Expecta

Stock Incentive Plans - Expectations of Future RSU Vesting and Settlement (Details) - Restricted Stock Units (RSUs) shares in Thousands	Mar. 31, 2017shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Vesting in 2017	31
Number of Shares Vesting in 2018	197
Number of Shares Vesting in 2019	262
Number of Shares Vesting in 2020	28
Settled in Cash in 2017	0.00%
Settled in Cash in 2018	10.00%
Settled in Cash in 2019	0.00%
Settled in Cash in 2020	0.00%
Settled in Stock in 2017	100.00%
Settled in Stock in 2018	90.00%
Settled in Stock in 2019	100.00%
Settled in Stock in 2020	100.00%

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Numerators
Net (loss) income from continuing operations attributable to GCP shareholders	$ (25)	$ 6
Income from discontinued operations, net of income taxes	8.1	11.8
Net (loss) income attributable to GCP shareholders	$ (16.9)	$ 17.8
Denominators
Weighted average common shares—basic calculation	71,200,000	70,600,000
Dilutive effect of employee stock awards (in shares)	0	300,000
Weighted average common shares—diluted calculation	71,200,000	70,900,000
Basic (loss) earnings per share
Net (loss) income from continuing operations attributable to GCP shareholders (in usd per share)	$ (0.35)	$ 0.08
Income from discontinued operations, net of income taxes (in usd per share)	0.11	0.17
Net income (loss) attributable to GCP shareholders (in usd per share)	(0.24)	0.25
Diluted (loss) earnings per share
Net (loss) income from continuing operations attributable to GCP shareholders (in usd per share)	(0.35)	0.08
Income from discontinued operations, net of income taxes (in usd per share)	0.11	0.17
Net income (loss) attributable to GCP shareholders (in usd per share)	$ (0.24)	$ 0.25
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Treasury stock purchased	$ 0.9	$ 1.7
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	0	200,000
Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	100,000	600,000
2016 Stock Incentive Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Treasury stock purchased under GCP 2016 Stock Incentive Plan, shares	33,000	84,000

Related Party Transactions an64

Related Party Transactions and Transactions with Grace - Related Party Expenses and Agreements (Details) - W.R. Grace & Co. - USD ($) $ in Millions	Feb. 03, 2016	Feb. 03, 2016	Mar. 31, 2017
Related Party Transaction [Line Items]
Allocated general corporate expenses		$ 2
Indemnified receivables, tax			$ 3.7
Indemnified payables, tax			$ 2.4
Maximum
Related Party Transaction [Line Items]
Transition period	18 months

Related Party Transactions an65

Related Party Transactions and Transactions with Grace - Parent Company Equity (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Related Party Transaction [Line Items]
Total net transfers to parent		$ (677.9)
Transfers to parent, net, per Consolidated Statement of Cash Flows	$ 0	(758.7)
Distribution to Grace related to the Separation		750
W.R. Grace & Co.
Related Party Transaction [Line Items]
Total net transfers to parent		(677.9)
Other, net		(80.8)
Transfers to parent, net, per Consolidated Statement of Cash Flows		(758.7)
Other, net		80.8
W.R. Grace & Co. | Cash pooling and general financing activities
Related Party Transaction [Line Items]
Total net transfers to parent		(690.8)
W.R. Grace & Co. | GCP expenses funded by parent
Related Party Transaction [Line Items]
Total net transfers to parent		6.6
W.R. Grace & Co. | Corporate costs allocations
Related Party Transaction [Line Items]
Total net transfers to parent		2
W.R. Grace & Co. | Provision for income taxes
Related Party Transaction [Line Items]
Total net transfers to parent		$ 4.3
W.R. Grace & Co. | Net pension liabilities
Related Party Transaction [Line Items]
Other, net			$ (44)
Other, net			44
W.R. Grace & Co. | Fixed assets
Related Party Transaction [Line Items]
Other, net			(23)
Other, net			23
W.R. Grace & Co. | Related party debt, deferred tax, and other
Related Party Transaction [Line Items]
Other, net			(36)
Other, net			$ 36

Operating Segment Information -

Operating Segment Information - Narrative (Details)	3 Months Ended
	Mar. 31, 2017segment
Segment Reporting [Abstract]
Number of operating segments	2

Operating Segment Information67

Operating Segment Information - Schedule of Operating Segment Data (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net Sales
Net sales	$ 225.3	$ 237.7
Segment Operating Income
Operating income	23.8	37.7
Operating Segments
Segment Operating Income
Operating income	23.8	37.7
Operating Segments | Specialty Construction Chemicals
Net Sales
Net sales	134	137
Segment Operating Income
Operating income	8.6	9.9
Operating Segments | Specialty Building Materials
Net Sales
Net sales	91.3	100.7
Segment Operating Income
Operating income	$ 15.2	$ 27.8

Operating Segment Information68

Operating Segment Information - Reconciliation of Operating Segment Data to Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Operating income	$ 23.8	$ 37.7
Corporate costs	(72.8)	(63.4)
Net income attributable to noncontrolling interests	0	0.4
(Loss) income from continuing operations before income taxes	(13.4)	8.1
Repositioning
Segment Reporting Information [Line Items]
Restructuring expenses	(2)	(4.3)
Changes in Business Environment and Structure
Segment Reporting Information [Line Items]
Restructuring expenses	(1.1)	(0.9)
Corporate
Segment Reporting Information [Line Items]
Corporate costs	(10.2)	(7.7)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Certain pension costs	(2.6)	(1.9)
Pension MTM adjustment and other related costs, net	0	(2.7)
Third-party acquisition-related costs	(0.4)	0
Amortization of acquired inventory fair value adjustment	(1.5)	0
Tax indemnification adjustments	(2.4)	0
Net income attributable to noncontrolling interests	0	0.4
Interest expense, net	(17)	(12.5)
Segment Reconciling Items | Repositioning
Segment Reporting Information [Line Items]
Restructuring expenses	(2)	(4.3)
Segment Reconciling Items | Changes in Business Environment and Structure
Segment Reporting Information [Line Items]
Restructuring expenses	(1.1)	(0.9)
Prior Segment - Darex | Corporate
Segment Reporting Information [Line Items]
Corporate costs	$ 3	$ 1.6

Operating Segment Information69

Operating Segment Information - Geographic Area Data (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 225.3	$ 237.7
Total North America
Segment Reporting Information [Line Items]
Net sales	111.9	112.6
United States
Segment Reporting Information [Line Items]
Net sales	106.8	106
Canada and Puerto Rico
Segment Reporting Information [Line Items]
Net sales	5.1	6.6
Europe Middle East Africa
Segment Reporting Information [Line Items]
Net sales	45.5	55.1
Asia Pacific
Segment Reporting Information [Line Items]
Net sales	51.2	54.9
Latin America
Segment Reporting Information [Line Items]
Net sales	$ 16.7	$ 15.1

Discontinued Operations - Narra

Discontinued Operations - Narrative (Details) - Darex - Held-for-sale - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 02, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received		$ 1,050
Term of Transition Services Agreement	24 months
Term of Master Tolling Agreement	24 months

Discontinued Operations - Incom

Discontinued Operations - Income (Loss) From Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of income taxes	$ 8.1	$ 11.8
Darex | Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	71.8	76.4
Cost of goods sold	45.2	48.4
Selling, general and administrative expenses	14.8	7.9
Research and development expenses	1.1	1.2
Other non-operating income, net	0.8	1.2
Provision for income taxes	(1.8)	(5.9)
Income from discontinued operations, net of income taxes	$ 8.1	$ 11.8

Discontinued Operations - Carry

Discontinued Operations - Carrying Amounts of Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 22.3		$ 15.9
Current assets held for sale	120.3	$ 108.9
Noncurrent assets held for sale	61.8	55.8
Current liabilities held for sale	54.8	48.7
Noncurrent liabilities held for sale	21.6	20.9
Darex | Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	22.3	17.2
Trade accounts receivable	48.1	50.5
Inventories	38.7	32.3
Other current assets	9.2	8.9
Current assets held for sale	118.3	108.9
Properties and equipment, net	41	40
Goodwill	4.7	4.4
Technology and other intangible assets, net	0.4	0.4
Deferred income taxes	7.9	6.4
Other assets	4.6	4.6
Noncurrent assets held for sale	58.6	55.8
Accounts payable	33.3	27.2
Other current liabilities	19.4	21.5
Current liabilities held for sale	52.7	48.7
Deferred income taxes	2.4	2.3
Underfunded and unfunded defined benefit pension plans	15.6	14.8
Other liabilities	3.5	3.8
Noncurrent liabilities held for sale	$ 21.5	$ 20.9

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Millions	2 Months Ended	3 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Subsequent Event [Line Items]
Net sales		$ 225.3	$ 237.7
Stirling Lloyd
Subsequent Event [Line Items]
Net sales					$ 40
Forecast | Stirling Lloyd | Subsequent Event
Subsequent Event [Line Items]
Cash payment for business acquisition	$ 94
Minimum | U.S. Pension Plan | Forecast
Subsequent Event [Line Items]
Curtailment gain				$ 4
Maximum | U.S. Pension Plan | Forecast
Subsequent Event [Line Items]
Curtailment gain				$ 6