ADT (ADT) 10-Q 8 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2018	Nov. 02, 2018
Entity [Abstract]
Entity Registrant Name	ADT Inc.
Entity Central Index Key	1,703,056
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		756,587,893

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 256,917	$ 122,899
Accounts receivable trade, less allowance for doubtful accounts of $41,144 and $34,042, respectively	154,629	148,822
Inventories	79,332	85,672
Work-in-progress	28,481	21,252
Prepaid expenses and other current assets	107,364	77,241
Total current assets	626,723	455,886
Property and equipment, net	308,671	332,445
Subscriber system assets, net	2,906,559	2,892,683
Intangible assets, net	7,488,118	7,856,775
Goodwill	5,088,325	5,070,586
Deferred subscriber acquisition costs, net	400,946	282,478
Other assets	148,242	123,967
Total assets	16,967,584	17,014,820
Current liabilities:
Current maturities of long-term debt	48,327	48,060
Accounts payable	206,135	187,695
Deferred revenue	310,766	309,157
Accrued expenses and other current liabilities	444,572	351,340
Total current liabilities	1,009,800	896,252
Long-term debt	9,519,504	10,121,126
Mandatorily redeemable preferred securities—authorized 1,000,000 shares Series A of $0.01 par value; issued and outstanding 750,000 shares as of December 31, 2017	0	682,449
Deferred subscriber acquisition revenue	505,188	368,669
Deferred tax liabilities	1,370,142	1,376,708
Other liabilities	126,956	136,504
Total liabilities	12,531,590	13,581,708
Commitments and contingencies (See Note 8)
Stockholders' equity:
Common stock—authorized 3,999,000,000 shares of $0.01 par value; issued and outstanding shares of 766,772,382 and 641,118,571 as of September 30, 2018 and December 31, 2017, respectively	7,668	2
Additional paid-in capital	5,947,280	4,435,329
Accumulated deficit	(1,504,054)	(998,212)
Accumulated other comprehensive loss	(14,900)	(4,007)
Total stockholders' equity	4,435,994	3,433,112
Total liabilities and stockholders' equity	$ 16,967,584	$ 17,014,820

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Allowance for doubtful accounts receivable, current	$ 41,144	$ 34,042
Common stock authorized (in shares)	3,999,000,000	3,999,000,000
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock issued (in shares)	766,772,382	641,118,571
Common stock outstanding (in shares)	766,772,382	641,118,571
Mandatorily Redeemable Preferred Stock
Mandatorily redeemable preferred securities authorized (in shares)		1,000,000
Mandatorily redeemable preferred securities par value (in dollars per share)		$ 0.01
Mandatorily redeemable preferred securities issued (in shares)		750,000
Mandatorily redeemable preferred securities outstanding (in shares)		750,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	Aug. 08, 2018	May 09, 2018	Mar. 15, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue				$ 1,148,316	$ 1,082,962	$ 3,396,223	$ 3,209,970
Cost of revenue (exclusive of depreciation and amortization shown separately below)				263,286	224,140	757,905	658,095
Selling, general and administrative expenses				295,119	284,137	922,627	923,048
Depreciation and intangible asset amortization				474,772	467,929	1,446,768	1,387,245
Merger, restructuring, integration, and other				(6,708)	14,505	1,770	54,170
Operating income				121,847	92,251	267,153	187,412
Interest expense, net				(152,405)	(184,369)	(501,217)	(553,529)
Loss on extinguishment of debt				(213,239)	0	(274,836)	(4,331)
Other income				552	22,960	29,374	35,965
Loss before income taxes				(243,245)	(69,158)	(479,526)	(334,483)
Income tax benefit				7,701	7,128	19,840	38,922
Net loss				$ (235,544)	$ (62,030)	$ (459,686)	$ (295,561)
Net loss per share:
Basic and diluted (in dollars per share)				$ (0.31)	$ (0.10)	$ (0.62)	$ (0.46)
Weighted-average number of shares:
Basic and diluted (in shares)				755,277	641,088	744,720	641,061
Cash dividends declared per common share (in dollars per share)	$ 0.035	$ 0.035	$ 0.035	$ 0.035	$ 0	$ 0.105	$ 1.170
Monitoring and Related Services
Revenue				$ 1,029,399	$ 1,012,292	$ 3,069,817	$ 3,017,026
Installation and Other
Revenue				$ 118,917	$ 70,670	$ 326,406	$ 192,944

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (235,544)	$ (62,030)	$ (459,686)	$ (295,561)
Other comprehensive income (loss), net of tax:
Change in fair value of cash flow hedges	8,621	0	6,332	0
Foreign currency translation and other	9,427	15,420	(17,225)	29,008
Total other comprehensive income (loss), net of tax	18,048	15,420	(10,893)	29,008
Comprehensive loss	$ (217,496)	$ (46,610)	$ (470,579)	$ (266,553)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of accounting standard, net of tax	$ 34,430			$ 34,430
Beginning balance (in shares) at Dec. 31, 2017	641,118,571	641,119,000
Beginning balance at Dec. 31, 2017	$ 3,433,112	$ 2	$ 4,435,329	(998,212)	$ (4,007)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued for initial public offering proceeds, net of related fees and tax benefit (in shares)		105,000,000
Common stock issued for initial public offering proceeds, net of related fees and tax benefit	1,406,706	$ 1,050	1,405,656
Other comprehensive loss, net of tax	(10,893)				(10,893)
Net loss	(459,686)			(459,686)
Dividends	(80,511)			(80,511)
Share-based compensation expense (in shares)		20,655,000
Share-based compensation expense	112,905		112,905
Other (in shares)		(2,000)
Other	$ (69)	$ 6,616	(6,610)	(75)
Ending balance (in shares) at Sep. 30, 2018	766,772,382	766,772,000
Ending balance at Sep. 30, 2018	$ 4,435,994	$ 7,668	$ 5,947,280	$ (1,504,054)	$ (14,900)

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss	$ (459,686)	$ (295,561)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and intangible asset amortization	1,446,768	1,387,245
Amortization of deferred subscriber acquisition costs	42,876	35,457
Amortization of deferred subscriber acquisition revenue	(56,381)	(31,470)
Share-based compensation expense	112,905	8,498
Deferred income taxes	(18,883)	(46,133)
Provision for losses on accounts receivable and inventory	43,948	42,322
Loss on extinguishment of debt	274,836	4,331
Other non-cash items, net	(1,920)	36,804
Changes in operating assets and liabilities, net of the effects of acquisitions:
Deferred subscriber acquisition costs	(135,777)	(122,225)
Deferred subscriber acquisition revenue	193,357	188,345
Other, net	(36,079)	54,727
Net cash provided by operating activities	1,405,964	1,262,340
Cash flows from investing activities:
Dealer generated customer accounts and bulk account purchases	(526,654)	(486,037)
Subscriber system assets	(428,292)	(445,201)
Capital expenditures	(94,151)	(102,671)
Acquisition of businesses, net of cash acquired	(48,473)	(31,810)
Other investing, net	13,550	16,549
Net cash used in investing activities	(1,084,020)	(1,049,170)
Cash flows from financing activities:
Proceeds from initial public offering, net of related fees	1,406,019	0
Proceeds from long-term borrowings	0	1,344,126
Repayment of long-term borrowings, including call premiums	(686,333)	(712,690)
Repayment of mandatorily redeemable preferred securities, including redemption premium	(852,769)	0
Dividends on common stock	(52,959)	(749,999)
Other financing	(1,441)	(11,023)
Net cash used in financing activities	(187,483)	(129,586)
Effect of currency translation on cash	(441)	61
Net increase in cash and cash equivalents and restricted cash and cash equivalents	134,020	83,645
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	126,782	90,893
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 260,802	$ 174,538

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Nature of Business —ADT Inc. (“ADT Inc.”), a company incorporated in the state of Delaware, and its wholly owned subsidiaries (collectively, the “Company”), are principally engaged in the sale, installation, servicing, and monitoring of electronic security and automation solutions for homes and businesses in the United States (or “U.S.”) and Canada. Prior to September 2017, ADT Inc. was named Prime Security Services Parent, Inc. ADT Inc. is majority-owned by Prime Security Services TopCo Parent, L.P. (“Ultimate Parent”). Ultimate Parent is owned by Apollo Investment Fund VIII, L.P. and related funds that are directly or indirectly managed by Apollo Global Management, LLC, its subsidiaries, and its affiliates (“Apollo” or the “Sponsor”), and management investors. Basis of Presentation —The condensed consolidated financial statements include the accounts of ADT Inc. and its wholly owned subsidiaries and have been prepared in U.S. dollars in accordance with generally accepted accounting principles in the United States of America (“GAAP”). The condensed consolidated financial statements included herein are unaudited, but in the opinion of management, such financial statements include all adjustments, consisting of normal recurring adjustments, necessary to summarize fairly the Company’s financial position, results of operations, and cash flows for the interim periods presented. The interim results reported in these condensed consolidated financial statements should not be taken as indicative of results that may be expected for future interim periods or the full year. For a more comprehensive understanding of the Company and its interim results, these condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2017 , which was filed with the U.S. Securities and Exchange Commission (“SEC”) on March 15, 2018. The Condensed Consolidated Balance Sheet as of December 31, 2017 included herein was derived from the audited consolidated financial statements as of that date but does not include all the footnote disclosures from the annual financial statements. The Company conducts business through its operating entities and reports financial and operating information in one segment. All intercompany transactions have been eliminated. The results of companies acquired are included in the condensed consolidated financial statements from the effective dates of the acquisitions. Reclassifications— Certain prior period amounts have been reclassified to conform with the current period presentation. Use of Estimates —The preparation of financial statements in accordance with GAAP requires management to make estimates and judgments that affect the reported amount of assets and liabilities, disclosure of contingent assets and liabilities, and reported amounts of revenue and expenses. Significant estimates and judgments inherent in the preparation of the condensed consolidated financial statements include, but are not limited to, estimates of future cash flows and valuation-related assumptions associated with asset impairment testing and the valuation of certain intangible and tangible assets and liabilities in connection with the acquisition of businesses, useful lives and methods for depreciation and amortization, loss contingencies, and income taxes and tax valuation allowances. Actual results could differ materially from these estimates. Stock Split —On January 4, 2018 , the board of directors of the Company declared a 1.681 -for-1 stock split (“Stock Split”) of the Company’s common stock issued and outstanding as of January 4, 2018 . Unless otherwise noted, all share and per-share data included in these condensed consolidated financial statements have been adjusted to give effect to the Stock Split. In addition, the number of shares subject to, and the exercise price of, the Company’s outstanding options were adjusted to reflect the Stock Split. Initial Public Offering —In January 2018, the Company completed its initial public offering (“IPO”) in which the Company issued and sold 105,000,000 shares of common stock at an initial public offering price of $14.00 per share. The Company received net proceeds of $1,406 million , after deducting underwriting discounts, commissions, and offering expenses, from the sale of its shares in the IPO. Upon consummation of the IPO, the Company’s common stock began trading on the New York Stock Exchange under the symbol “ADT.” On February 21, 2018, the Company used approximately $649 million of the net proceeds from the IPO to voluntarily redeem $594 million aggregate principal amount of 9.250% Second-Priority Senior Secured Notes due 2023 (“Prime Notes”) and pay the related call premium. The aggregate principal amount of Prime Notes outstanding after the repayment was $2,546 million . Refer to Note 5 “ Debt ” for further discussion. In connection with the IPO, the Company deposited $750 million of the net proceeds from the IPO into a segregated account (“Segregated Account”) for the purpose of redeeming the 750,000 shares of Series A $0.01 par value preferred securities (“Koch Preferred Securities”) at a future date. On July 2, 2018 , the Company redeemed in full the original stated value of $750 million of the Koch Preferred Securities for total consideration of approximately $949 million , which included $103 million related to the payment of the redemption premium, including tax reimbursements, and $96 million related to the accumulated dividend obligation on the Koch Preferred Securities (“Koch Redemption”). The Koch Redemption was funded with amounts in the Segregated Account and cash on hand. Refer to Note 6 “ Mandatorily Redeemable Preferred Securities ” for further discussion. Merger, Restructuring, Integration, and Other —Included in merger, restructuring, integration, and other in the Condensed Consolidated Statements of Operations are certain direct and incremental costs resulting from acquisitions made by the Company, certain related integration efforts as a result of those acquisitions, costs related to the Company’s restructuring efforts, as well as fair value remeasurements and impairment charges on certain of the Company’s strategic investments. Loss on Extinguishment of Debt —Included in loss on extinguishment of debt in the Condensed Consolidated Statements of Operations for the quarter and nine months ended September 30, 2018 is approximately $213 million associated with the Koch Redemption in July 2018 primarily related to the payment of the redemption premium and tax reimbursements, as well as the write-off of unamortized discount and deferred financing costs. Loss on extinguishment of debt for the nine months ended September 30, 2018 also includes approximately $62 million associated with the partial redemption of the Prime Notes in February 2018 primarily related to the payment of the call premium, as well as the write-off of a portion of the unamortized deferred financing costs. For the quarter and nine months ended September 30, 2017 , loss on extinguishment of debt was not material. Refer to Note 6 “ Mandatorily Redeemable Preferred Securities ” and Note 5 “ Debt ” for further discussion. Other Income —Included in other income for the nine months ended September 30, 2018 is approximately $22 million of licensing fees, as well as a gain of $7.5 million from the sale of equity in a third party that the Company received as part of a settlement, as described below. Other income for the quarter ended September 30, 2018 was not material. For the quarter and nine months ended September 30, 2017 , other income primarily includes foreign currency gains and losses from the translation of monetary assets and liabilities that are denominated in Canadian dollars related to intercompany loans. During the first quarter of 2018, the Company designated certain of these intercompany loans to be of a long-term-investment nature and began recognizing the related foreign currency gains and losses in accumulated other comprehensive loss in the Condensed Consolidated Balance Sheet. Subscriber System Assets, Net —Capitalized equipment and installation costs incurred in connection with transactions in which the Company retains ownership of the security systems are included in subscriber system assets, net in the Condensed Consolidated Balance Sheets. Depreciation expense relating to subscriber system assets is included in depreciation and intangible asset amortization in the Condensed Consolidated Statements of Operations. The following tables set forth the gross carrying amounts, accumulated depreciation, and depreciation expense relating to subscriber system assets for the periods presented. (in thousands) September 30, December 31, Gross carrying amount $ 4,170,741 $ 3,762,905 Accumulated depreciation (1,264,182 ) (870,222 ) Subscriber system assets, net $ 2,906,559 $ 2,892,683 For the Quarters Ended For the Nine Months Ended (in thousands) September 30, September 30, September 30, September 30, Subscriber system assets depreciation expense $ 137,488 $ 135,055 $ 410,236 $ 401,275 Accrued Expenses and Other Current Liabilities —Accrued expenses and other current liabilities as of September 30, 2018 and December 31, 2017 consist of the following: (in thousands) September 30, December 31, Accrued interest $ 144,886 $ 91,592 Payroll-related accruals 77,944 94,501 Other accrued liabilities 221,742 165,247 Accrued expenses and other current liabilities $ 444,572 $ 351,340 Financial Instruments —The Company’s financial instruments primarily consist of cash and cash equivalents, restricted cash and cash equivalents, accounts receivable, accounts payable, debt, preferred securities, and derivative financial instruments. Due to their short-term and/or liquid nature, the fair values of cash and cash equivalents, restricted cash and cash equivalents, accounts receivable, and accounts payable approximated their respective carrying values. Cash Equivalents —Included in cash and cash equivalents are investments in money market mutual funds, which totaled $136 million and $51 million as of September 30, 2018 and December 31, 2017 , respectively. These investments are classified as Level 1 for purposes of fair value measurement. Restricted Cash and Cash Equivalents —Restricted cash and cash equivalents are restricted for a specific purpose and cannot be included in the general cash account. Restricted cash and cash equivalents are included in prepaid expenses and other current assets in the Condensed Consolidated Balance Sheets and were not material as of September 30, 2018 and December 31, 2017 . Long-Term Debt Instruments —The fair values of the Company’s long-term debt instruments are determined using broker-quoted market prices, which are considered Level 2 inputs. The carrying amount of debt outstanding, if any, under the Company’s revolving credit facilities approximates fair value as interest rates on these borrowings approximate current market rates and are considered Level 2 inputs. The carrying value and fair value of the Company’s long-term debt instruments that are subject to fair value disclosures as of September 30, 2018 and December 31, 2017 are as follows: September 30, 2018 December 31, 2017 (in thousands) Carrying Fair Carrying Fair Debt instruments, excluding capital lease obligations $ 9,532,794 $ 9,840,892 $ 10,128,020 $ 10,868,626 Koch Preferred Securities— As stated above, the Company redeemed the Koch Preferred Securities in full on July 2, 2018. As of December 31, 2017, the Koch Preferred Securities had a carrying value and fair value of $682 million and $925 million , respectively. The fair value was estimated using a discounted cash-flow approach in conjunction with a binomial lattice interest rate model to incorporate the contractual dividends and the Company’s ability to redeem the Koch Preferred Securities. Key input assumptions to the valuation analysis included the credit spread, yield volatility, and expected time to redemption, which are considered Level 3 inputs. The credit spread was estimated using the credit spread at issuance of the Koch Preferred Securities and adjusted for the change in observed publicly traded debt of the Company between the issuance date and the measurement date. The yield volatility estimate was based on the historical yield volatility observed from comparable public high yield debt. The expected time to redemption was based on the Company’s expectations. Refer to Note 6 “ Mandatorily Redeemable Preferred Securities ” for further discussion. Derivative Financial Instruments —Derivative financial instruments are reported at fair value as either assets or liabilities in the Condensed Consolidated Balance Sheets. For derivative instruments that qualify for hedge accounting, changes in fair values are recognized in accumulated other comprehensive loss in the Condensed Consolidated Balance Sheets. For derivative instruments for which the Company does not apply hedge accounting, changes in fair values are recognized in the Condensed Consolidated Statements of Operations according to the nature of the hedged items. During the quarters and nine months ended September 30, 2018 and 2017 , changes in fair values of the Company’s derivative instruments were not material. Refer to Note 9 “ Derivative Financial Instruments ” for further discussion. Guarantees —In the normal course of business, the Company is liable for contract completion and product performance. The Company does not believe such obligations will significantly affect its financial position, results of operations, or cash flows. As of September 30, 2018 and December 31, 2017 , the Company had no material guarantees other than $55 million and $54 million , respectively, primarily in standby letters of credit related to its insurance programs. Settlements —In January 2018, the Company received $10 million in connection with a litigation settlement, which is reflected as a benefit to selling, general and administrative expenses in the Condensed Consolidated Statement of Operations for the nine months ended September 30, 2018 . In February 2018, the Company entered into a settlement agreement (“February 2018 Settlement Agreement”), the terms of which entitled the Company to receive $7.5 million of non-cash compensation in the form of an equity interest in the counterparty to the agreement (“Counterparty”), which the Company reflected as a benefit to selling, general and administrative expenses during the first quarter of 2018. Additionally, the February 2018 Settlement Agreement entitled the Company to receive $24 million in licensing fees over a forty-eight -month period. In the second quarter of 2018, the Counterparty was acquired by a third party. The terms of the acquisition entitled the Company to approximately $15 million in exchange for the Company’s equity interest in the Counterparty. The Company received approximately $12 million in cash associated with the sale of this equity interest during the second quarter of 2018, and recognized a gain of $7.5 million , which is reflected in other income in the Condensed Consolidated Statements of Operations. Additionally, as a result of the Counterparty’s acquisition, the Company concluded that amounts due under the license arrangement were probable to be collected. Therefore, the Company recognized a benefit of $22 million associated with the license arrangement, which is discounted to reflect a significant financing component and is reflected in other income in the Condensed Consolidated Statements of Operations. Hurricanes —The Company evaluates the potential financial and business impacts that hurricanes or other natural disasters may have on its business and operations. In the second half of 2017, there were three hurricanes impacting areas in which the Company operates that resulted in power outages and service disruptions to certain customers of the Company. As of September 30, 2018 , the Company determined that the financial impact from these hurricanes, as well as others that occurred during 2018, was not material. Recently Adopted Accounting Pronouncements —In May 2014, the Financial Accounting Standards Board (“FASB”) issued authoritative guidance that sets forth a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The Company adopted this new standard and its related amendments effective on January 1, 2018 using the modified retrospective transition method, whereby the cumulative effect of initially applying the new standard is recognized as an adjustment to the opening balance of stockholders’ equity. Results for reporting periods beginning on or after January 1, 2018 are presented under this new standard, while prior period amounts are not adjusted and continue to be reported under the accounting standards in effect for the prior period. The largest impact from the new standard relates to the timing of recognition of certain incremental selling costs associated with acquiring new customers. Under the new standard, certain costs previously amortized over the initial contract term will now be amortized in pools based on the expected life of a customer relationship using an accelerated method over 15 years. To a lesser extent, the adoption of the new standard impacted the identification of performance obligations and the allocation of transaction price to those performance obligations for certain sales of security systems sold outright to customers. As of January 1, 2018, due to the cumulative impact of adopting this new standard, the Company recorded a net increase to the opening balance of stockholders’ equity of $34 million , which is net of tax of $12 million . The impact to the line items in the Condensed Consolidated Balance Sheet was as follows: Balance at December 31, 2017 Revenue Standard Adoption Adjustment Balance at January 1, 2018 (in thousands) Assets Prepaid expenses and other current assets $ 77,241 $ 6,615 $ 83,856 Deferred subscriber acquisition costs, net 282,478 33,380 315,858 Other assets 123,967 6,321 130,288 Liabilities Deferred tax liabilities 1,376,708 11,886 1,388,594 Stockholders' equity Accumulated deficit (998,212 ) 34,430 (963,782 ) Refer to Note 2 “ Revenue ” for further discussion related to the impact of adopting this standard. In January 2016, the FASB issued authoritative guidance related to the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. Under the new guidance, equity investments with readily determinable fair values, except those accounted for under the equity method, will be measured at fair value with changes in fair value recognized in earnings. Equity investments that do not have readily determinable fair values may be measured at cost, less any impairment, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar investments of the same issuer. In addition, this update clarifies the guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from the unrealized losses on certain debt securities. The Company adopted this guidance effective on January 1, 2018. Fair value remeasurements on strategic investments and other equity investments are reflected in operating expenses and other income/expense, respectively, in the Condensed Consolidated Statements of Operations. The adoption of this guidance did not have a material impact to the condensed consolidated financial statements. In November 2016, the FASB issued authoritative guidance amending the presentation of restricted cash within the statement of cash flows. The new guidance requires amounts generally described as restricted cash and restricted cash equivalents to be included with cash and cash equivalents when reconciling beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The Company adopted this guidance effective on January 1, 2018 using the retrospective transition method for all periods presented in the Condensed Consolidated Statements of Cash Flows. The following table provides a reconciliation of the amount of cash and cash equivalents and restricted cash and cash equivalents reported within the Condensed Consolidated Balance Sheets to the total of the same such amounts shown in the Condensed Consolidated Statements of Cash Flows: (in thousands) September 30, 2018 December 31, 2017 Cash and cash equivalents $ 256,917 $ 122,899 Restricted cash and cash equivalents in prepaid expenses and other current assets 3,885 3,883 Cash and cash equivalents and restricted cash and cash equivalents at end of period $ 260,802 $ 126,782 In May 2017, the FASB issued authoritative guidance that addresses changes to the terms or conditions of a share-based payment award, specifically regarding which changes to the terms or conditions of a share-based payment award would require modification accounting. This guidance does not change the accounting for modifications but clarifies that an entity should apply modification accounting except when the fair value, vesting conditions, and classification of the modified award are the same as the original award immediately before the modification. The Company adopted this guidance effective on January 1, 2018 and applied the guidance prospectively to share-based payment award modifications subsequent to the date of adoption. The adoption of this guidance did not have a material impact to the condensed consolidated financial statements. Refer to Note 10 “ Share-based Compensation ” for further discussion. In August 2017, the FASB issued authoritative guidance which simplifies the application of hedge accounting standards to better portray the economic results of risk management activities in the financial statements. The guidance aligns the recognition and presentation of the effects of hedging instruments with the hedged items in the financial statements and includes certain targeted improvements to ease the application of current guidance related to the assessment of hedge effectiveness at inception and on an ongoing basis. The guidance also eliminates the requirement to measure and disclose the ineffective portion of the change in fair value of cash flow hedges. The Company elected to early adopt this guidance in the second quarter of 2018, and applied the guidance to qualified hedging instruments entered into subsequent to the date of adoption. The Company did not have any derivative instruments classified as hedging instruments prior to the date of adoption. The adoption of this guidance did not have a material impact to the condensed consolidated financial statements. Refer to Note 9 “ Derivative Financial Instruments ” for further discussion. In June 2018, the FASB issued authoritative guidance related to the accounting for non-employee share-based compensation transactions, which aligns the guidance for share-based payment transactions for acquiring goods and services from non-employees, with certain exceptions, with the guidance for share-based compensation for employees. The Company elected to early adopt this guidance in the third quarter of 2018. The adoption of this guidance did not have a material impact to the condensed consolidated financial statements. Recently Issued Accounting Pronouncements —In February 2016, the FASB issued authoritative guidance on accounting for leases. This new guidance, and related amendments, requires lessees to recognize a right-to-use asset and a lease liability for substantially all leases, and to disclose key information about leasing arrangements. The recognition, measurement, and presentation of expenses and cash flows for lessees will remain significantly unchanged from current guidance. This guidance is effective for all public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and will be effective for the Company in the first quarter of 2019. Early adoption is permitted. The guidance requires that a company adopt the standard using a modified retrospective approach, however, recent amendments allow for an alternative transition method whereby a company can apply this new guidance at the adoption date and recognize the cumulative effect of adoption as an adjustment to the opening balance of stockholders’ equity. The Company is currently evaluating the transition method, use of practical expedients, and impact of this guidance. In January 2017, the FASB issued authoritative guidance to simplify the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. This guidance will be effective for the Company for annual or any interim goodwill impairment tests beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests.

Revenue

Revenue	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue	Revenue The Company generates revenue primarily through contractual monthly recurring fees received for monitoring and related services provided to customers. In transactions in which the Company provides monitoring and related services but maintains ownership of the security systems, the Company’s performance obligations primarily include monitoring, related services (such as maintenance agreements), and a material right associated with the non-refundable fees received in connection with the initiation of a monitoring contract (referred to as deferred subscriber acquisition revenue) that the customer will not need to pay upon a renewal of the contract. The portion of the transaction price associated with monitoring and related services revenue is recognized as those services are provided and is reflected in monitoring and related services revenue in the Condensed Consolidated Statements of Operations. Deferred subscriber acquisition revenue is deferred and reported as deferred subscriber acquisition revenue in the Condensed Consolidated Balance Sheets upon initiation of a monitoring contract. Deferred subscriber acquisition revenue is amortized into installation and other revenue in the Condensed Consolidated Statements of Operations over the estimated life of the customer relationship using an accelerated method. Amortization of deferred subscriber acquisition revenue was $21 million and $56 million for the quarter and nine months ended September 30, 2018 , respectively. In transactions involving security systems that are sold outright to customers, the Company’s performance obligations include monitoring, related services, and the sale and installation of the security systems. For such arrangements, the Company allocates a portion of the transaction price to each performance obligation based on a relative standalone selling price. Revenue associated with the sale and installation of security systems is recognized once installation is complete and is reflected in installation and other revenue in the Condensed Consolidated Statements of Operations. Revenue associated with monitoring and related services is recognized as those services are provided and is reflected in monitoring and related services revenue in the Condensed Consolidated Statements of Operations. Early termination of the contract by the customer results in a termination charge in accordance with the contract terms. Contract termination charges are recognized in monitoring and related services revenue in the Condensed Consolidated Statements of Operations when collectability is probable. Amounts collected from customers for sales and other taxes are reported net of the related amounts remitted. The Company incurs certain incremental contract costs (referred to as deferred subscriber acquisition costs), including selling expenses (primarily commissions), related to acquiring customers, which are included in deferred subscriber acquisition costs, net in the Condensed Consolidated Balance Sheets. Commissions paid in connection with acquiring customers are determined based on the value of the contractual fees. Amortization of deferred subscriber acquisition costs was $16 million and $43 million for the quarter and nine months ended September 30, 2018 , respectively. Contract assets associated with outright sales are not material. Customer billings for services not yet rendered are deferred and recognized as revenue as services are provided. These fees are recorded as current deferred revenue in the Condensed Consolidated Balance Sheets as the Company expects to satisfy any remaining performance obligations, as well as recognize the related revenue, within twelve months. Accordingly, the Company has applied the practical expedient regarding deferred revenue to exclude the value of remaining performance obligations if (i) the contract has an original expected term of one year or less or (ii) the Company recognizes revenue in proportion to the amount it has the right to invoice for services performed. The impact from the adoption of the new revenue standard on the Company’s condensed consolidated financial statements as of and for the quarter and nine months ended September 30, 2018 was as follows: For the Quarter Ended September 30, 2018 For the Nine Months Ended September 30, 2018 As Reported Balances without Adoption of Standard Effect of Adoption As Reported Balances without Adoption of Standard Effect of Adoption Statements of Operations (in thousands) Monitoring and related services $ 1,029,399 $ 1,031,006 $ (1,607 ) $ 3,069,817 $ 3,074,260 $ (4,443 ) Installation and other 118,917 117,288 1,629 326,406 320,635 5,771 Total revenue 1,148,316 1,148,294 22 3,396,223 3,394,895 1,328 Cost of revenue (exclusive of depreciation and amortization shown separately below) 263,286 263,286 — 757,905 757,905 — Selling, general and administrative expenses (1) 295,119 302,039 (6,920 ) 922,627 943,010 (20,383 ) Depreciation and intangible asset amortization 474,772 474,772 — 1,446,768 1,446,768 — Merger, restructuring, integration, and other (6,708 ) (6,708 ) — 1,770 1,770 — Operating income 121,847 114,905 6,942 267,153 245,442 21,711 Interest expense, net (152,405 ) (152,405 ) — (501,217 ) (501,217 ) — Loss on extinguishment of debt (213,239 ) (213,239 ) — (274,836 ) (274,836 ) — Other income 552 552 — 29,374 29,374 — Loss before income taxes (243,245 ) (250,187 ) 6,942 (479,526 ) (501,237 ) 21,711 Income tax benefit 7,701 9,123 (1,422 ) 19,840 24,703 (4,863 ) Net loss $ (235,544 ) $ (241,064 ) $ 5,520 $ (459,686 ) $ (476,534 ) $ 16,848 _________________ (1) For the quarter and nine months ended September 30, 2018 , the effect of adoption includes approximately $5 million and $14 million , respectively, associated with non-cash amortization expense of deferred subscriber acquisition costs. As Reported Balances without Effect of Adoption Balance Sheet (in thousands) Assets Prepaid expenses and other current assets $ 107,364 $ 98,851 $ 8,513 Deferred subscriber acquisition costs, net 400,946 346,067 54,879 Other assets 148,242 143,607 4,635 Liabilities Deferred tax liabilities 1,370,142 1,353,393 16,749 Stockholders' equity Accumulated deficit (1,504,054 ) (1,555,332 ) 51,278 Disaggregated Revenue The following table sets forth the Company’s revenues disaggregated by source: (in thousands) For the Quarter Ended September 30, 2018 For the Nine Months Ended September 30, 2018 Monitoring and related services $ 1,029,399 $ 3,069,817 Installation and other 118,917 326,406 Total revenue $ 1,148,316 $ 3,396,223

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Acquisitions	Acquisitions From time to time, the Company may pursue acquisitions of companies that either strategically fit with the Company’s existing core business or expand the Company’s electronic security and automation solutions in new and attractive adjacent markets. The Company acquired four businesses during the nine months ended September 30, 2018 , and paid $48 million , net of cash acquired. In addition, the Company recorded preliminary amounts of approximately $23 million of goodwill and approximately $20 million of customer relationships in the Condensed Consolidated Balance Sheet related to these acquisitions. Dealer Generated Customer Accounts and Bulk Account Purchases The Company paid $527 million and $486 million for customer contracts for electronic security services generated through the Company’s network of authorized dealers (“ADT Authorized Dealer Program”) and bulk account purchases during the nine months ended September 30, 2018 and 2017

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill There were no material changes in the carrying amount of goodwill during the nine months ended September 30, 2018 . Other Intangible Assets The following table sets forth the gross carrying amounts, accumulated amortization, and net carrying amounts of the Company’s other intangible assets as of September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 (in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived intangible assets: Contracts and related customer relationships $ 7,284,196 $ (2,545,113 ) $ 4,739,083 $ 6,748,355 $ (1,749,327 ) $ 4,999,028 Dealer relationships 1,603,490 (209,915 ) 1,393,575 1,605,910 (146,299 ) 1,459,611 Other 196,898 (174,438 ) 22,460 195,363 (130,227 ) 65,136 Total definite-lived intangible assets 9,084,584 (2,929,466 ) 6,155,118 8,549,628 (2,025,853 ) 6,523,775 Indefinite-lived intangible assets: Trade name 1,333,000 — 1,333,000 1,333,000 — 1,333,000 Intangible assets $ 10,417,584 $ (2,929,466 ) $ 7,488,118 $ 9,882,628 $ (2,025,853 ) $ 7,856,775 For the nine months ended September 30, 2018 , the changes in the net carrying amount of contracts and related customer relationships were as follows: (in thousands) Balance as of December 31, 2017 $ 4,999,028 Acquisition of customer relationships 20,246 Customer contract additions, net of dealer charge-backs 525,729 Amortization (798,267 ) Currency translation and other (7,653 ) Balance as of September 30, 2018 $ 4,739,083 During the nine months ended September 30, 2018 , the weighted-average amortization period for customer contract additions primarily purchased through the ADT Authorized Dealer Program was 15 years . Amortization expense for definite-lived intangible assets for the periods presented was as follows: For the Quarters Ended For the Nine Months Ended (in thousands) September 30, September 30, September 30, September 30, Definite-lived intangible asset amortization expense $ 293,535 $ 292,023 $ 906,233 $ 864,918 The estimated aggregate amortization expense for definite-lived intangible assets is expected to be as follows: (in thousands) Remainder of 2018 $ 295,632 2019 1,143,309 2020 1,089,492 2021 987,260 2022 640,412 2023 284,929

Debt

Debt	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Debt	Debt First Lien Credit Agreement Amendment On March 16, 2018 , the Company entered into an Incremental Assumption and Amendment Agreement No. 6 (“2018 First Lien Credit Agreement Amendment”), which further amended and restated the First Lien Credit Agreement (the First Lien Credit Agreement, as amended, restated, supplemented, or otherwise waived prior to the effective date of the 2018 First Lien Credit Agreement Amendment (“Existing Credit Agreement”) and, as amended by the 2018 First Lien Credit Agreement Amendment (“Amended and Restated Credit Agreement”)). Prior to the effectiveness of the 2018 First Lien Credit Agreement Amendment, the Existing Credit Agreement included a revolving credit facility of $255 million maturing on May 2, 2021, and a revolving credit facility of $95 million maturing on July 1, 2020. In connection with the 2018 First Lien Credit Agreement Amendment, the existing revolving credit facilities were replaced with a first lien revolving credit facility with an aggregate commitment of up to $350 million maturing on March 16, 2023 , subject to the repayment, extension, or refinancing with longer maturity debt of certain of the Company’s other indebtedness (“2023 Revolving Credit Facility”). Borrowings under the 2023 Revolving Credit Facility will bear interest at a rate equal to, at the Company’s option, either (a) a London Interbank Offered Rate (“LIBOR”) determined by reference to the costs of funds for Eurodollar deposits for the interest period relevant to such borrowing, adjusted for certain additional costs, or (b) a base rate determined by reference to the highest of (i) the federal funds rate plus 0.50% per annum, (ii) the prime rate of Barclays Bank PLC, and (iii) one-month adjusted LIBOR plus 1.00% per annum, in each case, plus the applicable margin of 2.75% for LIBOR loans and 1.75% for base rate loans. The applicable margin for borrowings under the 2023 Revolving Credit Facility is subject to one step-down based on a certain specified net first lien leverage ratio. In addition, the Amended and Restated Credit Agreement requires the Company to pay a commitment fee between 0.375% and 0.50% (determined based on a net first lien leverage ratio) in respect of the unused commitments under the 2023 Revolving Credit Facility. The term loan facilities under the Amended and Restated Credit Agreement continue to have the same terms as provided under the Existing Credit Agreement. Additionally, the parties to the Amended and Restated Credit Agreement continue to have the same obligations set forth in the Existing Credit Agreement. The impact to the condensed consolidated financial statements as a result of the 2018 First Lien Credit Agreement Amendment was not material. As of September 30, 2018 , the Company had $350 million in available borrowing capacity under its 2023 Revolving Credit Facility. Prime Notes On February 21, 2018 , the Company used approximately $649 million of the net proceeds from the IPO to voluntarily redeem $594 million aggregate principal amount of the Prime Notes and pay the related call premium. The Company recognized a loss on extinguishment of debt of approximately $62 million related to the call premium and the write-off of a portion of the unamortized deferred financing costs. The aggregate principal amount of Prime Notes outstanding after the repayment was $2,546 million . See Note 1 “ Basis of Presentation and Summary of Significant Accounting Policies

Mandatorily Redeemable Preferre

Mandatorily Redeemable Preferred Securities	9 Months Ended
	Sep. 30, 2018
Other Liabilities Disclosure [Abstract]
Mandatorily Redeemable Preferred Securities	Mandatorily Redeemable Preferred Securities In connection with the acquisition of The ADT Security Corporation (formerly named The ADT Corporation) (“The ADT Corporation”), the Company issued 750,000 shares of the Koch Preferred Securities to an affiliate of Koch Industries, Inc. (“Koch Investor”). In January 2018, in connection with the IPO, the Company deposited $750 million of the net proceeds from the IPO into the Segregated Account for the purpose of redeeming the Koch Preferred Securities at a future date. In May 2018, the Company entered into a written consent with the Koch Investor (“May 2018 Consent”), whereby the Company agreed to redeem all of the outstanding Koch Preferred Securities, which occurred on July 2, 2018. Prior to redemption, the Koch Preferred Securities accrued and accumulated preferential cumulative dividends in arrears on the then current stated value of the Koch Preferred Securities. Dividends were payable quarterly, in cash, at a rate equal to the daily five-year treasury rate plus 9.00% per annum. In the event that dividends for any quarter were not paid in cash, dividends for such quarter would accrue and accumulate at a rate equal to the daily five-year treasury rate plus 9.75% per annum and would be added to the then current stated value of the Koch Preferred Securities at the end of such quarter. The quarterly dividend obligation on the Koch Preferred Securities is reflected in interest expense, net in the Condensed Consolidated Statements of Operations. Beginning in the third quarter of 2017, in lieu of declaring and paying the dividend obligation on the Koch Preferred Securities, the Company elected to increase the accumulated stated value of such securities, which increased the reported balance of mandatorily redeemable preferred securities on the Condensed Consolidated Balance Sheet. Prior to the Koch Redemption, the reported balance of mandatorily redeemable preferred securities on the Condensed Consolidated Balance Sheet reflected approximately $96 million associated with the dividend obligation on the Koch Preferred Securities, of which approximately $51 million related to the dividend obligation on the Koch Preferred Securities for the nine months ended September 30, 2018 . For the quarter and nine months ended September 30, 2017 , the dividend obligation on the Koch Preferred Securities was $22 million and $63 million , respectively. On July 2, 2018 , the Company redeemed in full the original stated value of $750 million of the Koch Preferred Securities for total consideration of approximately $949 million , which included approximately $103 million related to the redemption premium and tax reimbursements, as well as $96 million related to the accumulated dividend obligation on the Koch Preferred Securities. The Koch Redemption was funded with amounts in the Segregated Account and cash on hand. During the quarter and nine months ended September 30, 2018 , the Company recognized a loss on extinguishment of debt of $213 million associated with the payment of the redemption premium, including tax reimbursements, and the write-off of unamortized discount and deferred financing costs. Refer to Note 1 “ Basis of Presentation and Summary of Significant Accounting Policies ” for further discussion on the fair value of the Koch Preferred Securities. Koch Agreements Prior to the consummation of the IPO, the Company, Prime Security Services TopCo Parent GP, LLC, as the general partner of Ultimate Parent, Ultimate Parent, and the Koch Investor entered into an Amended and Restated Series A Investor Rights Agreement, which was amended and restated by the Second Amended and Restated Series A Investor Rights Agreement (“Investor Rights Agreement”), which contained certain designations, rights, preferences, powers, restrictions, and limitations that could require the Company to redeem all or a portion of the Koch Preferred Securities or require that the Company obtain the consent of the holders of a majority of the Koch Preferred Securities before taking certain actions or entering into certain transactions. While the certificate of designation of the Koch Preferred Securities restricted the Company from paying dividends on its common stock, the Koch Investor consented in January 2018 to a one-time distribution on or before June 30, 2018, not to exceed $50 million , which the Company used to declare a dividend on its common stock on March 15, 2018. Further, in the May 2018 Consent, the Koch Investor consented to an additional one-time distribution in an aggregate amount not to exceed $27 million , which the Company used to declare a dividend on its common stock on May 9, 2018.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Unrecognized Tax Benefits During the quarter ended September 30, 2018 , the Company had a net increase to its unrecognized tax benefits of $13 million primarily related to tax attributes from the Company’s pre-Separation from Tyco (as defined in Note 8 ) tax returns. The Company’s unrecognized tax benefits relate to tax years that remain subject to audit by the taxing authorities in the U.S. federal, state and local, and foreign jurisdictions. Based on the current status of its income tax audits, the Company does not believe that a significant portion of its unrecognized tax benefits will be resolved in the next twelve months. Effective Tax Rate The Company’s income tax benefit for the quarter and nine months ended September 30, 2018 was $8 million and $20 million , respectively, resulting in an effective tax rate of 3.2% and 4.1% , respectively. The effective tax rates for the quarter and nine months ended September 30, 2018 reflect the reduced federal income tax rate of 21.0% as a result of the Tax Cuts and Jobs Act (“Tax Reform”). The effective tax rate for the quarter ended September 30, 2018 also reflects an 11.2% unfavorable impact of permanent non-deductible expenses primarily associated with the Koch Preferred Securities, a 5.6% unfavorable impact from an increase in the Company’s unrecognized tax benefits, and a 4.9% unfavorable impact from state legislative changes. The effective tax rate for the nine months ended September 30, 2018 also reflects an 11.6% unfavorable impact of permanent non-deductible expenses primarily associated with the Koch Preferred Securities, a 7.3% unfavorable impact of future non-deductible share-based compensation, and a 4.2% unfavorable impact from state legislative changes, offset by a 5.6% favorable impact from tax adjustments related to prior year state returns filed in the first quarter of 2018. The Company’s income tax benefit for the quarter and nine months ended September 30, 2017 was $7 million and $39 million , respectively, resulting in an effective tax rate of 10.3% and 11.6% , respectively. The effective tax rates for the quarter and nine months ended September 30, 2017 primarily reflect the impact of an increase in the Company’s unrecognized tax benefits related to income tax positions primarily associated with prior years, including pre-Separation from Tyco tax years, the impact of legislative changes, an increase in the Company’s valuation allowance for certain deferred tax assets, and the impact of permanent non-deductible expenses. The effective tax rates reflect the tax impact of permanent items, state tax expense, changes in tax laws, and non-U.S. net earnings. The effective tax rate can vary from period to period due to permanent tax adjustments, discrete items such as the settlement of income tax audits and changes in tax laws, as well as recurring factors such as changes in the overall effective state tax rate. Tax Reform In connection with Tax Reform, the SEC issued Staff Accounting Bulletin No. 118 that allows companies to record provisional estimates of the effects of the legislative change and a one-year measurement period to finalize the accounting of those effects. During the quarter and nine months ended September 30, 2018 , the Company did not record any significant measurement period adjustments to the provisional amounts recorded in the 2017 consolidated financial statements. The Company expects to complete the accounting for the impact of Tax Reform by the end of 2018.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Purchase Obligations As of September 30, 2018 , there have been no material changes to the Company’s purchase obligations outside the ordinary course of business as compared to December 31, 2017 . Legal Proceedings The Company is subject to various claims and lawsuits in the ordinary course of business, including from time to time, contractual disputes, employment matters, product and general liability claims, claims that the Company has infringed on the intellectual property rights of others, claims related to alleged security system failures, and consumer and employment class actions. In the ordinary course of business, the Company is also subject to regulatory and governmental examinations, information requests and subpoenas, inquiries, investigations, and threatened legal actions and proceedings. In connection with such formal and informal inquiries, the Company receives numerous requests, subpoenas, and orders for documents, testimony, and information in connection with various aspects of its activities. The Company has recorded accruals for losses that it believes are probable to occur and are reasonably estimable. While the ultimate outcome of these matters cannot be predicted with certainty, the Company believes that the resolution of any such proceedings (other than matters specifically identified below), will not have a material adverse effect on its financial position, results of operations, or cash flows. Environmental Matters On October 25, 2013, ADT was notified by subpoena that the Office of the Attorney General of California, in conjunction with the Alameda County District Attorney, is investigating whether certain of ADT’s electronic waste disposal policies, procedures, and practices are in violation of the California Business and Professions Code and the California Health and Safety Code. During 2016, Protection One was also notified by the same parties that it was subject to a similar investigation. Both the Protection One and ADT investigations are ongoing and the Company is attempting to coordinate joint handling of both investigations and is cooperating fully with the respective authorities. Wireless Encryption Litigation The Company is subject to five class action claims regarding wireless encryption in certain ADT security systems. Jurisdictionally, three of the five cases are in Federal Court (in districts within Illinois, Arizona, and California), and both of the remaining two cases are in Florida State Court (both in Palm Beach County Circuit Court). Each of the five plaintiffs brought a claim under the respective state’s consumer fraud statute alleging that The ADT Corporation and each of its consolidated subsidiaries prior to the consummation of the ADT Acquisition made misrepresentations and material omissions in its advertising regarding the unencrypted wireless signal pathways in certain security systems monitored by The ADT Corporation. The complaints in all five cases further allege that certain security systems monitored by The ADT Corporation are not secure because the wireless signal pathways are unencrypted and can be easily hacked. On January 10, 2017, the parties agreed to settle all five class action lawsuits. On October 16, 2017, the U.S. District Court for the Northern District of California entered an order granting preliminary approval of the settlement. Notice to class members was issued November 16, 2017, and the settlement is currently in the administration process. A fairness hearing regarding the settlement was conducted on February 1, 2018. The Court took the matter under advisement and subsequently stayed the settlement proceedings pending an appellate ruling on a related legal issue. The deadline for filing claims expired on February 26, 2018. The settlement administrator will not pay any claims until the Court enters an order granting final approval of the settlement. TCPA Class Action relating to 2G-3G Radio Conversion Project In August 2016, the Company was served with a class action complaint pending in the United States District Court for the Northern District of Georgia filed by a customer alleging that The ADT Corporation violated the Telephone Consumer Protection Act of 1991 (“TCPA”) by calling his cell phone, which was the only telephone number he provided to The ADT Corporation for his customer account, as part of The ADT Corporation’s efforts to communicate with customers affected by the Federal Communications Commission order allowing wireless carriers to sunset 2G wireless networks. Plaintiff seeks to represent a nationwide class of all The ADT Corporation customers who received such calls to their cell phones from 2013 to present. The premise of the plaintiff’s claim is that The ADT Corporation’s calls were telemarketing calls, which require a higher level of consent, and not transactional/business relationship calls because The ADT Corporation used the 2G transactional calls in an attempt to sell additional products and services. Plaintiff filed a motion for class certification. The ADT Corporation filed its opposition to class certification and further filed a motion for summary judgment in September 2017. The case settled for a nominal value in May 2018 prior to the Court ruling on the motions. Shareholder Litigation Five substantially similar shareholder class action lawsuits related to the January 2018 IPO of ADT Inc. common stock were filed in the Circuit Court of the Fifteenth Judicial Circuit in and for Palm Beach County, Florida in March, April, and May 2018. The actions are entitled Goldstrand Investments Inc. v. ADT Inc ., Krebsbach v. ADT Inc ., Katz v. ADT Inc ., Sweet v. ADT Inc., and Lowinger v. ADT Inc . These cases have been consolidated for discovery and trial and are now entitled In re ADT Inc. Shareholder Litigation . The Lead Plaintiffs seek to represent a class of similarly situated shareholders and assert claims for alleged violations of the Securities Act of 1933, as amended (“Securities Act”). Plaintiffs allege that the ADT Inc. defendants violated the Securities Act because the registration statement and prospectus used to effectuate the IPO were false and misleading in that they allegedly misled investors with respect to litigation involving ADT Inc., ADT Inc.’s efforts to protect its intellectual property, and the competitive pressures faced by ADT Inc. Defendants moved to dismiss the consolidated complaint on October 23, 2018. Briefing on the motion is in progress. A similar shareholder class action lawsuit also related to the January 2018 IPO was filed in the United States District Court for the Southern District of Florida in May 2018. The action is entitled Perdomo v. ADT Inc. In September and October 2018, four substantially similar shareholder derivative complaints were also filed against various ADT Inc. officers, directors and controlling shareholders in the United States District Court for the Southern District of Florida. The actions are entitled, Velasco v. Whall; Myung v. Whall; Scheel v. Whall ; and Bradel v. Whall . Plaintiffs allege breaches of fiduciary duties as directors, officers, and/or controlling shareholders of ADT Inc., unjust enrichment, and violations of the federal securities laws for alleged misrepresentations regarding competitive pressures in the marketplace, litigation involving ADT Inc. intellectual property, and certain financial and operational metrics. On November 1, 2018, the Velasco action was transferred to the judge presiding over the earlier filed Perdomo action. California Independent Contractor Litigation In August 2017, Jabra Shuheiber filed civil litigation in Marin County Superior Court on behalf of himself and two other individuals asserting wage and hour violations against the Company. The action is entitled Jabra Shuheiber v. ADT, LLC (Case Number CV 1702912, Superior Court, Marin County). Mr. Shuheiber was the owner/operator of a sub-contractor, Maximum Protection, Inc. (“MPI”), who employed the other two plaintiffs in the litigation. In August 2018, in response to the California Supreme Court’s decision in Dynamex Operations West, Inc. v. Superior Court of Los Angeles County , counsel for Mr. Shuheiber provided the Company with a proposed amended complaint that modified the wage and hour claims such that they were brought on a class basis. The proposed class is not clearly defined but appears to be two groups of individuals: 1) individual owners of sub-contractors who performed services for the sub-contractor; and 2) individuals with no ownership interest in a sub-contractor who were employed by the sub-contractor and provided services pursuant to a contract between the sub-contractor and the Company. The Company has not been served with the proposed amended complaint. Income Tax Matters On September 28, 2012, Johnson Controls International plc (as successor to Tyco International Ltd., “Tyco”) distributed to its public stockholders The ADT Corporation’s common stock (“Separation from Tyco”), and The ADT Corporation became an independent public company. In connection with the Separation from Tyco in September 2012, The ADT Corporation entered into the 2012 Tax Sharing Agreement that governs the rights and obligations of The ADT Corporation, Tyco, and Pentair Ltd. for certain pre-Separation from Tyco tax liabilities, including Tyco’s obligations under the 2007 Tax Sharing Agreement among Tyco, Covidien, now operating as a subsidiary of Medtronic, and TE Connectivity. The ADT Corporation is responsible for all of its own taxes that are not shared pursuant to the 2012 Tax Sharing Agreement’s sharing formulae. Tyco and Pentair Ltd. are likewise responsible for their tax liabilities that are not subject to the 2012 Tax Sharing Agreement’s sharing formulae. Tyco has the right to administer, control, and settle all U.S. income tax audits for the periods prior to and including the Separation from Tyco. In accordance with the 2012 Tax Sharing Agreement, Tyco is responsible for the first $500 million of tax, interest, and penalties assessed against pre-2013 tax years including its 27% share of the tax, interest, and penalties assessed for periods prior to Tyco’s 2007 spin-off transaction. In addition to the Company’s share of cash taxes pursuant to the 2012 Tax Sharing Agreement, the Company’s net operating loss (“NOL”) and credit carryforwards may be significantly reduced or eliminated by audit adjustments to pre-2013 tax periods. NOL and credit carryforwards may be reduced prior to incurring any cash tax liability and will not be compensated for under the tax sharing agreement. The Company believes that its income tax reserves and the liabilities recorded for the 2012 Tax Sharing Agreement continue to be appropriate. The ultimate resolution of any matters challenged by the tax authorities is uncertain, and if the tax authorities were to prevail, it could have a material adverse impact on the Company’s financial position, results of operations, and cash flows, potentially including a significant reduction in or the elimination of the Company’s available NOL and credit carryforwards generated in pre-Separation from Tyco periods. Further, to the extent The ADT Corporation is responsible for any liability under the 2012 Tax Sharing Agreement, there could be a material impact on its financial position, results of operations, cash flows, or its effective tax rate in future reporting periods. During the third quarter of 2017, the Company was notified by the IRS of its intent to disallow amortization deductions claimed on the Company’s $987 million trademark (value as of 2012) and the Notice of Proposed Adjustment was received from the IRS in April 2018. The Company strongly disagreed with the IRS’s position and maintained that the deductions claimed were appropriate. During the third quarter of 2018, the Company successfully defended its originally filed tax return position, and the IRS notified the Company of its withdrawal of the proposed adjustments disallowing amortization deductions claimed on the Company’s trademark. The IRS also officially closed the fiscal year 2010-2012 audit cycle with no additional adjustments to The ADT Corporation. Accordingly, as of the third quarter of 2018, all tax years through 2012 have been audited and resolved with the IRS, with the only remaining item being the finalization of the Company’s carryforward attributes. The IRS and the Company are currently working to reconcile differences on the carry forward attributes. Other liabilities in the Company’s Condensed Consolidated Balance Sheets related to The ADT Corporation’s obligations under certain tax related agreements entered into in conjunction with the Separation from Tyco were not material as of September 30, 2018 and December 31, 2017

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company holds interest rate swap contracts with the objective of managing exposure to variability in interest rates on the Company’s debt. As of September 30, 2018 , the Company had interest rate swap contracts outstanding with an aggregate notional amount of $3.5 billion , which consist of notional amounts of $1.5 billion and $1.0 billion entered into in June 2018 and August 2018, respectively, both maturing in April 2022, that are designated as cash flow hedges (“2018 Derivatives”), and notional amounts of $1.0 billion entered into in April 2017 maturing in April 2020, that are not designated as hedging instruments (“2017 Derivatives”). The 2018 Derivatives consist of a series of LIBOR-based interest rate swap contracts. Changes in fair value of the 2018 Derivatives are recorded in accumulated other comprehensive loss in the Condensed Consolidated Balance Sheets and are reclassified into interest expense in the same period in which the related interest on the debt obligations affects earnings. As of September 30, 2018 , the 2018 Derivatives were highly effective. The impact to the condensed consolidated financial statements as a result of the 2018 Derivatives was not material. Further, amounts expected to be reclassified from accumulated other comprehensive loss into interest expense during the next twelve months is not material. Changes in fair value of the 2017 Derivatives are reflected in interest expense, net in the Condensed Consolidated Statements of Operations, and were not material for the quarters and nine months ended September 30, 2018 and 2017

Share-based Compensation

Share-based Compensation	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation	Share-based Compensation 2016 Equity Incentive Plan Awards In 2016, the Company approved the 2016 Equity Incentive Plan, which provides for the issuance of non-qualified stock options to various employees of the Company. The Company records share-based compensation expense on options subject to time-based vesting, and subsequent to the consummation of the IPO, on options subject to vesting based upon the achievement of certain investment return thresholds by Apollo. The Company does not expect to issue additional share-based compensation awards under the 2016 Equity Incentive Plan. For the quarters and nine months ended September 30, 2018 and 2017 , share-based compensation expense for awards under the 2016 Equity Incentive Plan was not material. Class B Unit Redemption The Company records share-based compensation expense on certain Class B Unit awards granted to employees by Ultimate Parent (“Class B Units”). The Class B Units have two separate tranches, one of which is subject to time-based vesting over a five -year period (“Class B Unit Service Tranche”), and the other subject to vesting based upon the achievement of certain investment return thresholds by Apollo (“Class B Unit Performance Tranche”). Prior to the IPO, the Company recorded share-based compensation expense on the Class B Unit Service Tranche, whereas no share-based compensation expense was recorded on the Class B Unit Performance Tranche as the vesting of these awards was not deemed probable. During the first quarter of 2018 and in connection with the IPO, each holder of Class B Units in Ultimate Parent had his or her entire Class B interest in Ultimate Parent redeemed for the number of shares of the Company’s common stock (“Distributed Shares”) that would have been distributed to such holder under the terms of Ultimate Parent’s operating agreement in a hypothetical liquidation on the date of the IPO at the initial public offering price (“Class B Unit Redemption”). All vesting conditions for the Distributed Shares remain the same as the vesting conditions that existed under the terms of the Class B Units. The Distributed Shares also have certain other restrictions pursuant to the terms and conditions of the Company’s Amended and Restated Management Investor Rights Agreement (“MIRA”). Furthermore, as part of the Class B Unit Redemption, each holder received both vested and unvested Distributed Shares in the same proportion as the holder’s vested and unvested Class B Units held immediately prior to the IPO. As a result of the Class B Unit Redemption, holders of Class B Units received a total of 20.6 million shares of the Company’s common stock ( 17.8 million of which were unvested at the time of redemption). Of the Distributed Shares issued upon the Class B Unit Redemption, 50% were subject to the vesting conditions that existed for the Class B Unit Service Tranche (“Distributed Shares Service Tranche”) and 50% were subject to the vesting conditions that existed for the Class B Unit Performance Tranche (“Distributed Shares Performance Tranche”). As discussed below, all remaining unvested shares in the Distributed Shares Service Tranche became fully vested in July 2018. As of September 30, 2018 , there were 10.2 million unvested and outstanding shares in the Distributed Shares Performance Tranche. The Class B Unit Redemption resulted in a modification of the Class B Units. In connection with the modification, the Company utilized a Monte Carlo simulation to estimate the fair value of the Distributed Shares, as well as the derived service period for the Distributed Shares Performance Tranche. Significant assumptions included in the simulation were the risk-free interest rate and the expected volatility of the Company’s stock price. The Company selected a risk-free interest rate of 2.43% , which was based on a five-year U.S. Treasury with a zero-coupon rate. The Company also selected a stock price volatility of 30% , which was implied based upon an average of historical volatilities of publicly traded companies in industries similar to the Company, as the Company did not have sufficient history to use as a basis for actual stock price volatility. Additionally, because holders of unvested Distributed Shares are entitled to receive previously declared accrued dividends once the shares vest, a dividend yield assumption was not included in the simulation. The Class B Unit Redemption resulted in weighted-average fair values of $14.00 and $12.97 for the Distributed Shares Service Tranche and Performance Tranche, respectively. The fair values also incorporate the estimated impact of post-vesting selling restrictions pursuant to the MIRA. During the first quarter of 2018, the Company began recording share-based compensation expense on the Distributed Shares Performance Tranche on a straight-line basis over the derived service period of approximately three years from the IPO date, as the vesting conditions were deemed probable following the consummation of the IPO. For the Distributed Shares Service Tranche, incremental compensation expense recorded as a result of the modification was not material. Additionally, the IPO triggered an acceleration of vesting of the unvested shares in the Distributed Shares Service Tranche, causing such Distributed Shares to become fully vested six months from the date of the IPO, which occurred in July 2018. Share-based compensation expense associated with the Distributed Shares Service Tranche was $2 million and $28 million for the quarter and nine months ended September 30, 2018 , respectively. Share-based compensation expense associated with the Distributed Shares Performance Tranche was $6 million and $29 million for the quarter and nine months ended September 30, 2018 , respectively. Top-up Options In January 2018, the Company approved its 2018 Omnibus Incentive Plan (“2018 Omnibus Incentive Plan”), which became effective upon consummation of the IPO. Under the 2018 Omnibus Incentive Plan, and in connection with the Class B Unit Redemption, the Company granted 12.7 million options to holders of Class B Units (“Top-up Options”). The Top-up Options have an exercise price equal to the initial public offering price per share of the Company’s common stock and a contractual term of ten years from the grant date. Similar to the vesting conditions outlined above for the Distributed Shares, the Top-up Options contain a tranche subject to time-based vesting (“Top-up Options Service Tranche”) and a tranche subject to vesting based upon the achievement of certain investment return thresholds by Apollo (“Top-up Options Performance Tranche”). Recipients of the Top-up Options received both vested and unvested Top-up Options in the same proportion as the vested and unvested Class B Units held immediately prior to the IPO and Class B Unit Redemption. These vesting conditions are the same vesting conditions as those attributable to the Distributed Shares, including the condition that accelerated vesting of the unvested options in the Top-up Options Service Tranche, causing such options to become fully vested six months from the date of the IPO, which occurred in July 2018. Any shares of the Company’s common stock acquired upon exercise of the Top-up Options will be subject to the terms of the MIRA. The Company used a Monte Carlo simulation to estimate the fair value of the Top-up Options, as well as the derived service period for the Top-up Options Performance Tranche. Significant assumptions included in the simulation were the risk-free interest rate, the expected volatility, and the expected dividend yield. The Company selected a risk-free interest rate of 2.43% , which was based on a five-year U.S. Treasury with a zero-coupon rate. The Company selected a stock price volatility of 30% , which was implied based upon an average of historical volatilities of publicly traded companies in industries similar to the Company, as the Company did not have sufficient history to use as a basis for actual stock price volatility. The Company also assumed a 1% dividend yield. The expected average exercise term was derived based on an average of the outcomes of various scenarios performed under the Monte Carlo simulation. For the nine months ended September 30, 2018 , the weighted-average grant date fair values of the Top-up Options Service Tranche and Top-up Options Performance Tranche were $5.02 and $5.04 , respectively. The fair values also incorporate the estimated impact of post-vesting selling restrictions pursuant to the MIRA. In July 2018, all remaining unvested options in the Top-up Options Service Tranche became fully vested. As of September 30, 2018 , there were 6.3 million unvested and outstanding options in the Top-up Options Performance Tranche. The Company recorded share-based compensation expense associated with the Top-up Options Service Tranche on a straight-line basis over the requisite service period of six months from the IPO date. Share-based compensation expense associated with the Top-up Options Service Tranche was $2 million and $32 million for the quarter and nine months ended September 30, 2018 , respectively. The Company records share-based compensation expense associated with the Top-up Options Performance Tranche on a straight-line basis over the derived service period of approximately three years from the IPO date. Share-based compensation expense associated with the Top-up Options Performance Tranche was $2 million and $7 million for the quarter and nine months ended September 30, 2018 , respectively. Other 2018 Share-Based Compensation Awards During the first quarter of 2018, in connection with the IPO, the Company granted 4.0 million options (“2018 Options”) and 1.1 million restricted stock units (“RSUs”) (“2018 RSUs”) under the 2018 Omnibus Incentive Plan. The 2018 Options and 2018 RSUs will cliff vest over a three -year period. For the 2018 Options, the contractual term is ten years . Other options and RSUs granted during the quarter and nine months ended September 30, 2018 were not material. The Company used a Black-Scholes pricing model to estimate the fair value of the 2018 Options granted in the first quarter of 2018. Significant assumptions included in the model were the risk-free interest rate, the expected volatility, the expected dividend yield, and the expected exercise term. The Company selected a risk-free interest rate of 2.52% , which was based on a six-year U.S. Treasury with a zero-coupon rate. The Company selected a stock price volatility of 30% , which was implied based upon an average of historical volatilities of publicly traded companies in industries similar to the Company, as the Company did not have sufficient history to use as a basis for actual stock price volatility. The Company also assumed a 1% dividend yield. The expected average exercise term of 6.5 years was calculated using the simplified method, as the Company did not have sufficient historical exercise data to provide a reasonable basis to estimate future exercise patterns. The grant date fair values of the 2018 Options and 2018 RSUs granted in connection with the IPO were $4.35 and $14.00 , respectively. The Company records share-based compensation expense associated with the 2018 Options and 2018 RSUs on a straight-line basis over the requisite service period. For the quarter and nine months ended September 30, 2018 , share-based compensation expense associated with the 2018 Options and 2018 RSUs was not material. As of September 30, 2018 , the number of 2018 Options and 2018 RSUs granted in connection with the IPO that were unvested and outstanding were 3.8 million and 1.0 million , respectively. For all share-based compensation awards, the Company recognizes forfeitures as they occur. Share-based compensation expense is included in selling, general and administrative expenses in the Condensed Consolidated Statements of Operations. For the quarter and nine months ended September 30, 2018 , share-based compensation expense on all awards was $18 million and $113 million , respectively. For the quarter and nine months ended September 30, 2017 , share-based compensation expense on all awards was $4 million and $8 million

Equity

Equity	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Equity	Equity Stock Split and Initial Public Offering Refer to Note 1 “ Basis of Presentation and Summary of Significant Accounting Policies ” for a discussion regarding the Stock Split and the Company’s completion of an IPO in January 2018. Common Stock Dividends During the nine months ended September 30, 2018 , the Company’s board of directors declared the following cash dividends on common stock: Declared Date Dividend per Share Record Date Payment Date March 15, 2018 $0.035 March 26, 2018 April 5, 2018 May 9, 2018 $0.035 June 25, 2018 July 10, 2018 August 8, 2018 $0.035 September 18, 2018 October 2, 2018 During the nine months ended September 30, 2017 , the Company paid dividends in an aggregate amount of $750 million in February and April 2017 to the Company’s equity holders and Ultimate Parent, which primarily included distributions to the Company’s Sponsor (“Special Dividend”). Accumulated Other Comprehensive Loss During the quarters and nine months ended September 30, 2018 and 2017 , the Company did not record any material reclassifications out of accumulated other comprehensive loss. Other As discussed in Note 1 “ Basis of Presentation and Summary of Significant Accounting Policies ,” the opening balance of stockholders’ equity for the nine months ended September 30, 2018 includes $34 million

Net Loss per Share

Net Loss per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Net Loss per Share	Net Loss per Share Basic net loss per share is computed by dividing net loss available to common stockholders by the weighted average number of common shares outstanding for the period, without consideration for common stock equivalents. Diluted net loss per share is calculated by dividing net loss available to common stockholders by the diluted weighted average number of common shares outstanding for the period. Diluted net loss per share would reflect the potential dilutive effect of common stock equivalents outstanding for the period determined using the treasury-stock method. For purposes of the diluted net loss per share calculation, all awards that potentially could be dilutive were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive, therefore, basic net loss per share is equal to diluted net loss per share for each period presented. The following table includes the computations of basic and diluted net loss per share for the periods presented. For the Quarters Ended For the Nine Months Ended (in thousands, except per share amounts) September 30, September 30, September 30, September 30, Numerator: Net loss $ (235,544 ) $ (62,030 ) $ (459,686 ) $ (295,561 ) Denominator: Weighted-average number of shares outstanding, 755,277 641,088 744,720 641,061 Net loss per share: Basic and diluted $ (0.31 ) $ (0.10 ) $ (0.62 ) $ (0.46 )

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Management Consulting Agreement In May 2016, in connection with the acquisition of The ADT Corporation, Apollo Management Holdings, L.P., an affiliate of the Company’s Sponsor (“Management Service Provider”) entered into a management consulting agreement with the Company (“Management Consulting Agreement”) relating to the provision of certain management consulting and advisory services to the Company following this acquisition. The Management Consulting Agreement terminated in accordance with its terms in January 2018 upon consummation of the IPO. Prior to the termination of the Management Consulting Agreement, the Company paid approximately $1 million to the Management Service Provider during the nine months ended September 30, 2018 . During the quarter and nine months ended September 30, 2017 , fees under the Management Consulting Agreement were $5 million and $15 million , respectively. These fees are included in selling, general and administrative expenses in the Condensed Consolidated Statements of Operations. Koch Preferred Securities The Company identified the Koch Investor as a related party. Refer to Note 6 “ Mandatorily Redeemable Preferred Securities ” for further discussion of transactions related to the Koch Preferred Securities. Apollo Global Securities, LLC An affiliate of Apollo, Apollo Global Securities, LLC (“AGS”), served as an underwriter in the Company’s IPO. As part of the IPO, AGS agreed to purchase, and the Company agreed to sell, 4,200,000 shares of common stock. The Company paid $2 million in commissions to AGS in connection with its role as an underwriter in the IPO. The net amount of this transaction is included in common stock issued for initial public offering proceeds in the Condensed Consolidated Statement of Stockholders’ Equity for the nine months ended September 30, 2018 . During the nine months ended September 30, 2017 , the Company paid approximately $1 million to AGS related to amendments and restatements to the Company’s first lien credit facilities. These expenses are included in selling, general and administrative expenses in the Condensed Consolidated Statements of Operations. Other Transactions During the nine months ended September 30, 2017 , the Company paid $750 million of the Special Dividend to the Company’s equity holders and Ultimate Parent, which primarily included distributions to its Sponsor. In connection with the Special Dividend, the Company also paid $45 million of structuring fees to the Koch Investor, which is included in selling, general and administrative expenses in the Condensed Consolidated Statements of Operations for the nine months ended September 30, 2017

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Common Stock Dividend On November 7, 2018 , the Company’s board of directors declared a cash dividend of $0.035 per share to common stockholders of record as of December 14, 2018 . This dividend will be paid on January 4, 2019 . Acquisition of Red Hawk Fire & Security On October 24, 2018, the Company entered into a Purchase Agreement and Plan of Merger (“Merger Agreement”) to acquire Red Hawk Fire & Security (“Red Hawk”), a nationwide leader in commercial fire, life safety, and security services, for total consideration of approximately $317.5 million in cash. Under the terms of the Merger Agreement, Red Hawk will become a wholly-owned indirect subsidiary of the Company (“Merger”). The consummation of the Merger is subject to customary closing conditions and is expected to occur in the fourth quarter of 2018. The Company will account for this transaction as a business combination using the acquisition method of accounting. In connection with the Merger, the Company has obtained debt financing commitments for up to an additional $317.5 million

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation —The condensed consolidated financial statements include the accounts of ADT Inc. and its wholly owned subsidiaries and have been prepared in U.S. dollars in accordance with generally accepted accounting principles in the United States of America (“GAAP”). The condensed consolidated financial statements included herein are unaudited, but in the opinion of management, such financial statements include all adjustments, consisting of normal recurring adjustments, necessary to summarize fairly the Company’s financial position, results of operations, and cash flows for the interim periods presented. The interim results reported in these condensed consolidated financial statements should not be taken as indicative of results that may be expected for future interim periods or the full year. For a more comprehensive understanding of the Company and its interim results, these condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2017 , which was filed with the U.S. Securities and Exchange Commission (“SEC”) on March 15, 2018. The Condensed Consolidated Balance Sheet as of December 31, 2017 included herein was derived from the audited consolidated financial statements as of that date but does not include all the footnote disclosures from the annual financial statements. The Company conducts business through its operating entities and reports financial and operating information in one
Reclassifications	Reclassifications—Certain prior period amounts have been reclassified to conform with the current period presentation.
Use of Estimates	Use of Estimates—The preparation of financial statements in accordance with GAAP requires management to make estimates and judgments that affect the reported amount of assets and liabilities, disclosure of contingent assets and liabilities, and reported amounts of revenue and expenses. Significant estimates and judgments inherent in the preparation of the condensed consolidated financial statements include, but are not limited to, estimates of future cash flows and valuation-related assumptions associated with asset impairment testing and the valuation of certain intangible and tangible assets and liabilities in connection with the acquisition of businesses, useful lives and methods for depreciation and amortization, loss contingencies, and income taxes and tax valuation allowances. Actual results could differ materially from these estimates.
Merger, Restructuring, Integration, and Other	Merger, Restructuring, Integration, and Other—Included in merger, restructuring, integration, and other in the Condensed Consolidated Statements of Operations are certain direct and incremental costs resulting from acquisitions made by the Company, certain related integration efforts as a result of those acquisitions, costs related to the Company’s restructuring efforts, as well as fair value remeasurements and impairment charges on certain of the Company’s strategic investments.
Subscriber System Assets, Net	Subscriber System Assets, Net—Capitalized equipment and installation costs incurred in connection with transactions in which the Company retains ownership of the security systems are included in subscriber system assets, net in the Condensed Consolidated Balance Sheets. Depreciation expense relating to subscriber system assets is included in depreciation and intangible asset amortization in the Condensed Consolidated Statements of Operations.
Financial Instruments	Financial Instruments—The Company’s financial instruments primarily consist of cash and cash equivalents, restricted cash and cash equivalents, accounts receivable, accounts payable, debt, preferred securities, and derivative financial instruments.
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents	Cash Equivalents —Included in cash and cash equivalents are investments in money market mutual funds, which totaled $136 million and $51 million as of September 30, 2018 and December 31, 2017 , respectively. These investments are classified as Level 1 for purposes of fair value measurement. Restricted Cash and Cash Equivalents —Restricted cash and cash equivalents are restricted for a specific purpose and cannot be included in the general cash account. Restricted cash and cash equivalents are included in prepaid expenses and other current assets in the Condensed Consolidated Balance Sheets and were not material as of September 30, 2018 and December 31, 2017
Long-Term Debt Instruments and Preferred Securities	Long-Term Debt Instruments —The fair values of the Company’s long-term debt instruments are determined using broker-quoted market prices, which are considered Level 2 inputs. The carrying amount of debt outstanding, if any, under the Company’s revolving credit facilities approximates fair value as interest rates on these borrowings approximate current market rates and are considered Level 2 inputs. The carrying value and fair value of the Company’s long-term debt instruments that are subject to fair value disclosures as of September 30, 2018 and December 31, 2017 are as follows: September 30, 2018 December 31, 2017 (in thousands) Carrying Fair Carrying Fair Debt instruments, excluding capital lease obligations $ 9,532,794 $ 9,840,892 $ 10,128,020 $ 10,868,626 Koch Preferred Securities— As stated above, the Company redeemed the Koch Preferred Securities in full on July 2, 2018. As of December 31, 2017, the Koch Preferred Securities had a carrying value and fair value of $682 million and $925 million
Derivative Financial Instruments	Derivative Financial Instruments—Derivative financial instruments are reported at fair value as either assets or liabilities in the Condensed Consolidated Balance Sheets. For derivative instruments that qualify for hedge accounting, changes in fair values are recognized in accumulated other comprehensive loss in the Condensed Consolidated Balance Sheets. For derivative instruments for which the Company does not apply hedge accounting, changes in fair values are recognized in the Condensed Consolidated Statements of Operations according to the nature of the hedged items.
Guarantees	Guarantees—In the normal course of business, the Company is liable for contract completion and product performance. The Company does not believe such obligations will significantly affect its financial position, results of operations, or cash flows.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements —In May 2014, the Financial Accounting Standards Board (“FASB”) issued authoritative guidance that sets forth a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The Company adopted this new standard and its related amendments effective on January 1, 2018 using the modified retrospective transition method, whereby the cumulative effect of initially applying the new standard is recognized as an adjustment to the opening balance of stockholders’ equity. Results for reporting periods beginning on or after January 1, 2018 are presented under this new standard, while prior period amounts are not adjusted and continue to be reported under the accounting standards in effect for the prior period. The largest impact from the new standard relates to the timing of recognition of certain incremental selling costs associated with acquiring new customers. Under the new standard, certain costs previously amortized over the initial contract term will now be amortized in pools based on the expected life of a customer relationship using an accelerated method over 15 years. To a lesser extent, the adoption of the new standard impacted the identification of performance obligations and the allocation of transaction price to those performance obligations for certain sales of security systems sold outright to customers. As of January 1, 2018, due to the cumulative impact of adopting this new standard, the Company recorded a net increase to the opening balance of stockholders’ equity of $34 million , which is net of tax of $12 million . The impact to the line items in the Condensed Consolidated Balance Sheet was as follows: Balance at December 31, 2017 Revenue Standard Adoption Adjustment Balance at January 1, 2018 (in thousands) Assets Prepaid expenses and other current assets $ 77,241 $ 6,615 $ 83,856 Deferred subscriber acquisition costs, net 282,478 33,380 315,858 Other assets 123,967 6,321 130,288 Liabilities Deferred tax liabilities 1,376,708 11,886 1,388,594 Stockholders' equity Accumulated deficit (998,212 ) 34,430 (963,782 ) Refer to Note 2 “ Revenue ” for further discussion related to the impact of adopting this standard. In January 2016, the FASB issued authoritative guidance related to the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. Under the new guidance, equity investments with readily determinable fair values, except those accounted for under the equity method, will be measured at fair value with changes in fair value recognized in earnings. Equity investments that do not have readily determinable fair values may be measured at cost, less any impairment, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar investments of the same issuer. In addition, this update clarifies the guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from the unrealized losses on certain debt securities. The Company adopted this guidance effective on January 1, 2018. Fair value remeasurements on strategic investments and other equity investments are reflected in operating expenses and other income/expense, respectively, in the Condensed Consolidated Statements of Operations. The adoption of this guidance did not have a material impact to the condensed consolidated financial statements. In November 2016, the FASB issued authoritative guidance amending the presentation of restricted cash within the statement of cash flows. The new guidance requires amounts generally described as restricted cash and restricted cash equivalents to be included with cash and cash equivalents when reconciling beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The Company adopted this guidance effective on January 1, 2018 using the retrospective transition method for all periods presented in the Condensed Consolidated Statements of Cash Flows. The following table provides a reconciliation of the amount of cash and cash equivalents and restricted cash and cash equivalents reported within the Condensed Consolidated Balance Sheets to the total of the same such amounts shown in the Condensed Consolidated Statements of Cash Flows: (in thousands) September 30, 2018 December 31, 2017 Cash and cash equivalents $ 256,917 $ 122,899 Restricted cash and cash equivalents in prepaid expenses and other current assets 3,885 3,883 Cash and cash equivalents and restricted cash and cash equivalents at end of period $ 260,802 $ 126,782 In May 2017, the FASB issued authoritative guidance that addresses changes to the terms or conditions of a share-based payment award, specifically regarding which changes to the terms or conditions of a share-based payment award would require modification accounting. This guidance does not change the accounting for modifications but clarifies that an entity should apply modification accounting except when the fair value, vesting conditions, and classification of the modified award are the same as the original award immediately before the modification. The Company adopted this guidance effective on January 1, 2018 and applied the guidance prospectively to share-based payment award modifications subsequent to the date of adoption. The adoption of this guidance did not have a material impact to the condensed consolidated financial statements. Refer to Note 10 “ Share-based Compensation ” for further discussion. In August 2017, the FASB issued authoritative guidance which simplifies the application of hedge accounting standards to better portray the economic results of risk management activities in the financial statements. The guidance aligns the recognition and presentation of the effects of hedging instruments with the hedged items in the financial statements and includes certain targeted improvements to ease the application of current guidance related to the assessment of hedge effectiveness at inception and on an ongoing basis. The guidance also eliminates the requirement to measure and disclose the ineffective portion of the change in fair value of cash flow hedges. The Company elected to early adopt this guidance in the second quarter of 2018, and applied the guidance to qualified hedging instruments entered into subsequent to the date of adoption. The Company did not have any derivative instruments classified as hedging instruments prior to the date of adoption. The adoption of this guidance did not have a material impact to the condensed consolidated financial statements. Refer to Note 9 “ Derivative Financial Instruments ” for further discussion. In June 2018, the FASB issued authoritative guidance related to the accounting for non-employee share-based compensation transactions, which aligns the guidance for share-based payment transactions for acquiring goods and services from non-employees, with certain exceptions, with the guidance for share-based compensation for employees. The Company elected to early adopt this guidance in the third quarter of 2018. The adoption of this guidance did not have a material impact to the condensed consolidated financial statements. Recently Issued Accounting Pronouncements —In February 2016, the FASB issued authoritative guidance on accounting for leases. This new guidance, and related amendments, requires lessees to recognize a right-to-use asset and a lease liability for substantially all leases, and to disclose key information about leasing arrangements. The recognition, measurement, and presentation of expenses and cash flows for lessees will remain significantly unchanged from current guidance. This guidance is effective for all public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and will be effective for the Company in the first quarter of 2019. Early adoption is permitted. The guidance requires that a company adopt the standard using a modified retrospective approach, however, recent amendments allow for an alternative transition method whereby a company can apply this new guidance at the adoption date and recognize the cumulative effect of adoption as an adjustment to the opening balance of stockholders’ equity. The Company is currently evaluating the transition method, use of practical expedients, and impact of this guidance. In January 2017, the FASB issued authoritative guidance to simplify the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. This guidance will be effective for the Company for annual or any interim goodwill impairment tests beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests.

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Components of System Assets	The following tables set forth the gross carrying amounts, accumulated depreciation, and depreciation expense relating to subscriber system assets for the periods presented. (in thousands) September 30, December 31, Gross carrying amount $ 4,170,741 $ 3,762,905 Accumulated depreciation (1,264,182 ) (870,222 ) Subscriber system assets, net $ 2,906,559 $ 2,892,683 For the Quarters Ended For the Nine Months Ended (in thousands) September 30, September 30, September 30, September 30, Subscriber system assets depreciation expense $ 137,488 $ 135,055 $ 410,236 $ 401,275
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities as of September 30, 2018 and December 31, 2017 consist of the following: (in thousands) September 30, December 31, Accrued interest $ 144,886 $ 91,592 Payroll-related accruals 77,944 94,501 Other accrued liabilities 221,742 165,247 Accrued expenses and other current liabilities $ 444,572 $ 351,340
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments and Securities	The carrying value and fair value of the Company’s long-term debt instruments that are subject to fair value disclosures as of September 30, 2018 and December 31, 2017 are as follows: September 30, 2018 December 31, 2017 (in thousands) Carrying Fair Carrying Fair Debt instruments, excluding capital lease obligations $ 9,532,794 $ 9,840,892 $ 10,128,020 $ 10,868,626
Impact of New Accounting Pronouncements on Financial Statements	The impact to the line items in the Condensed Consolidated Balance Sheet was as follows: Balance at December 31, 2017 Revenue Standard Adoption Adjustment Balance at January 1, 2018 (in thousands) Assets Prepaid expenses and other current assets $ 77,241 $ 6,615 $ 83,856 Deferred subscriber acquisition costs, net 282,478 33,380 315,858 Other assets 123,967 6,321 130,288 Liabilities Deferred tax liabilities 1,376,708 11,886 1,388,594 Stockholders' equity Accumulated deficit (998,212 ) 34,430 (963,782 ) nine months ended September 30, 2018 was as follows: For the Quarter Ended September 30, 2018 For the Nine Months Ended September 30, 2018 As Reported Balances without Adoption of Standard Effect of Adoption As Reported Balances without Adoption of Standard Effect of Adoption Statements of Operations (in thousands) Monitoring and related services $ 1,029,399 $ 1,031,006 $ (1,607 ) $ 3,069,817 $ 3,074,260 $ (4,443 ) Installation and other 118,917 117,288 1,629 326,406 320,635 5,771 Total revenue 1,148,316 1,148,294 22 3,396,223 3,394,895 1,328 Cost of revenue (exclusive of depreciation and amortization shown separately below) 263,286 263,286 — 757,905 757,905 — Selling, general and administrative expenses (1) 295,119 302,039 (6,920 ) 922,627 943,010 (20,383 ) Depreciation and intangible asset amortization 474,772 474,772 — 1,446,768 1,446,768 — Merger, restructuring, integration, and other (6,708 ) (6,708 ) — 1,770 1,770 — Operating income 121,847 114,905 6,942 267,153 245,442 21,711 Interest expense, net (152,405 ) (152,405 ) — (501,217 ) (501,217 ) — Loss on extinguishment of debt (213,239 ) (213,239 ) — (274,836 ) (274,836 ) — Other income 552 552 — 29,374 29,374 — Loss before income taxes (243,245 ) (250,187 ) 6,942 (479,526 ) (501,237 ) 21,711 Income tax benefit 7,701 9,123 (1,422 ) 19,840 24,703 (4,863 ) Net loss $ (235,544 ) $ (241,064 ) $ 5,520 $ (459,686 ) $ (476,534 ) $ 16,848 _________________ (1) For the quarter and nine months ended September 30, 2018 , the effect of adoption includes approximately $5 million and $14 million , respectively, associated with non-cash amortization expense of deferred subscriber acquisition costs. As Reported Balances without Effect of Adoption Balance Sheet (in thousands) Assets Prepaid expenses and other current assets $ 107,364 $ 98,851 $ 8,513 Deferred subscriber acquisition costs, net 400,946 346,067 54,879 Other assets 148,242 143,607 4,635 Liabilities Deferred tax liabilities 1,370,142 1,353,393 16,749 Stockholders' equity Accumulated deficit (1,504,054 ) (1,555,332 ) 51,278
Schedule of Restrictions on Cash and Cash Equivalents	The following table provides a reconciliation of the amount of cash and cash equivalents and restricted cash and cash equivalents reported within the Condensed Consolidated Balance Sheets to the total of the same such amounts shown in the Condensed Consolidated Statements of Cash Flows: (in thousands) September 30, 2018 December 31, 2017 Cash and cash equivalents $ 256,917 $ 122,899 Restricted cash and cash equivalents in prepaid expenses and other current assets 3,885 3,883 Cash and cash equivalents and restricted cash and cash equivalents at end of period $ 260,802 $ 126,782
Schedule of Cash and Cash Equivalents	The following table provides a reconciliation of the amount of cash and cash equivalents and restricted cash and cash equivalents reported within the Condensed Consolidated Balance Sheets to the total of the same such amounts shown in the Condensed Consolidated Statements of Cash Flows: (in thousands) September 30, 2018 December 31, 2017 Cash and cash equivalents $ 256,917 $ 122,899 Restricted cash and cash equivalents in prepaid expenses and other current assets 3,885 3,883 Cash and cash equivalents and restricted cash and cash equivalents at end of period $ 260,802 $ 126,782

Revenues (Tables)

Revenues (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Impact of New Accounting Pronouncements on Financial Statements	The impact to the line items in the Condensed Consolidated Balance Sheet was as follows: Balance at December 31, 2017 Revenue Standard Adoption Adjustment Balance at January 1, 2018 (in thousands) Assets Prepaid expenses and other current assets $ 77,241 $ 6,615 $ 83,856 Deferred subscriber acquisition costs, net 282,478 33,380 315,858 Other assets 123,967 6,321 130,288 Liabilities Deferred tax liabilities 1,376,708 11,886 1,388,594 Stockholders' equity Accumulated deficit (998,212 ) 34,430 (963,782 ) nine months ended September 30, 2018 was as follows: For the Quarter Ended September 30, 2018 For the Nine Months Ended September 30, 2018 As Reported Balances without Adoption of Standard Effect of Adoption As Reported Balances without Adoption of Standard Effect of Adoption Statements of Operations (in thousands) Monitoring and related services $ 1,029,399 $ 1,031,006 $ (1,607 ) $ 3,069,817 $ 3,074,260 $ (4,443 ) Installation and other 118,917 117,288 1,629 326,406 320,635 5,771 Total revenue 1,148,316 1,148,294 22 3,396,223 3,394,895 1,328 Cost of revenue (exclusive of depreciation and amortization shown separately below) 263,286 263,286 — 757,905 757,905 — Selling, general and administrative expenses (1) 295,119 302,039 (6,920 ) 922,627 943,010 (20,383 ) Depreciation and intangible asset amortization 474,772 474,772 — 1,446,768 1,446,768 — Merger, restructuring, integration, and other (6,708 ) (6,708 ) — 1,770 1,770 — Operating income 121,847 114,905 6,942 267,153 245,442 21,711 Interest expense, net (152,405 ) (152,405 ) — (501,217 ) (501,217 ) — Loss on extinguishment of debt (213,239 ) (213,239 ) — (274,836 ) (274,836 ) — Other income 552 552 — 29,374 29,374 — Loss before income taxes (243,245 ) (250,187 ) 6,942 (479,526 ) (501,237 ) 21,711 Income tax benefit 7,701 9,123 (1,422 ) 19,840 24,703 (4,863 ) Net loss $ (235,544 ) $ (241,064 ) $ 5,520 $ (459,686 ) $ (476,534 ) $ 16,848 _________________ (1) For the quarter and nine months ended September 30, 2018 , the effect of adoption includes approximately $5 million and $14 million , respectively, associated with non-cash amortization expense of deferred subscriber acquisition costs. As Reported Balances without Effect of Adoption Balance Sheet (in thousands) Assets Prepaid expenses and other current assets $ 107,364 $ 98,851 $ 8,513 Deferred subscriber acquisition costs, net 400,946 346,067 54,879 Other assets 148,242 143,607 4,635 Liabilities Deferred tax liabilities 1,370,142 1,353,393 16,749 Stockholders' equity Accumulated deficit (1,504,054 ) (1,555,332 ) 51,278
Disaggregation of Revenue	The following table sets forth the Company’s revenues disaggregated by source: (in thousands) For the Quarter Ended September 30, 2018 For the Nine Months Ended September 30, 2018 Monitoring and related services $ 1,029,399 $ 3,069,817 Installation and other 118,917 326,406 Total revenue $ 1,148,316 $ 3,396,223

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Indefinite-Lived Intangible Assets	The following table sets forth the gross carrying amounts, accumulated amortization, and net carrying amounts of the Company’s other intangible assets as of September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 (in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived intangible assets: Contracts and related customer relationships $ 7,284,196 $ (2,545,113 ) $ 4,739,083 $ 6,748,355 $ (1,749,327 ) $ 4,999,028 Dealer relationships 1,603,490 (209,915 ) 1,393,575 1,605,910 (146,299 ) 1,459,611 Other 196,898 (174,438 ) 22,460 195,363 (130,227 ) 65,136 Total definite-lived intangible assets 9,084,584 (2,929,466 ) 6,155,118 8,549,628 (2,025,853 ) 6,523,775 Indefinite-lived intangible assets: Trade name 1,333,000 — 1,333,000 1,333,000 — 1,333,000 Intangible assets $ 10,417,584 $ (2,929,466 ) $ 7,488,118 $ 9,882,628 $ (2,025,853 ) $ 7,856,775
Schedule of Finite-Lived Intangible Assets	The following table sets forth the gross carrying amounts, accumulated amortization, and net carrying amounts of the Company’s other intangible assets as of September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 (in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived intangible assets: Contracts and related customer relationships $ 7,284,196 $ (2,545,113 ) $ 4,739,083 $ 6,748,355 $ (1,749,327 ) $ 4,999,028 Dealer relationships 1,603,490 (209,915 ) 1,393,575 1,605,910 (146,299 ) 1,459,611 Other 196,898 (174,438 ) 22,460 195,363 (130,227 ) 65,136 Total definite-lived intangible assets 9,084,584 (2,929,466 ) 6,155,118 8,549,628 (2,025,853 ) 6,523,775 Indefinite-lived intangible assets: Trade name 1,333,000 — 1,333,000 1,333,000 — 1,333,000 Intangible assets $ 10,417,584 $ (2,929,466 ) $ 7,488,118 $ 9,882,628 $ (2,025,853 ) $ 7,856,775 nine months ended September 30, 2018 , the changes in the net carrying amount of contracts and related customer relationships were as follows: (in thousands) Balance as of December 31, 2017 $ 4,999,028 Acquisition of customer relationships 20,246 Customer contract additions, net of dealer charge-backs 525,729 Amortization (798,267 ) Currency translation and other (7,653 ) Balance as of September 30, 2018 $ 4,739,083
Finite-lived Intangible Assets Amortization Expense	Amortization expense for definite-lived intangible assets for the periods presented was as follows: For the Quarters Ended For the Nine Months Ended (in thousands) September 30, September 30, September 30, September 30, Definite-lived intangible asset amortization expense $ 293,535 $ 292,023 $ 906,233 $ 864,918
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The estimated aggregate amortization expense for definite-lived intangible assets is expected to be as follows: (in thousands) Remainder of 2018 $ 295,632 2019 1,143,309 2020 1,089,492 2021 987,260 2022 640,412 2023 284,929

Equity (Tables)

Equity (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Schedule of Dividends Declared	During the nine months ended September 30, 2018 , the Company’s board of directors declared the following cash dividends on common stock: Declared Date Dividend per Share Record Date Payment Date March 15, 2018 $0.035 March 26, 2018 April 5, 2018 May 9, 2018 $0.035 June 25, 2018 July 10, 2018 August 8, 2018 $0.035 September 18, 2018 October 2, 2018

Net Loss per Share (Tables)

Net Loss per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table includes the computations of basic and diluted net loss per share for the periods presented. For the Quarters Ended For the Nine Months Ended (in thousands, except per share amounts) September 30, September 30, September 30, September 30, Numerator: Net loss $ (235,544 ) $ (62,030 ) $ (459,686 ) $ (295,561 ) Denominator: Weighted-average number of shares outstanding, 755,277 641,088 744,720 641,061 Net loss per share: Basic and diluted $ (0.31 ) $ (0.10 ) $ (0.62 ) $ (0.46 )

Basis of Presentation and Sum_4

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Thousands	Jul. 02, 2018USD ($)	Feb. 21, 2018USD ($)	Jan. 04, 2018	Feb. 28, 2018USD ($)	Jan. 31, 2018USD ($)$ / sharesshares	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)segment	Sep. 30, 2017USD ($)	Feb. 22, 2018USD ($)	Jan. 01, 2018USD ($)	Dec. 31, 2017USD ($)$ / sharesshares
Debt Instrument [Line Items]
Number of operating segments | segment									1
Stock split, conversion ratio			1.681
Noncurrent restricted cash and cash equivalents					$ 750,000
Mandatorily redeemable preferred securities par value (in dollars per share) | $ / shares					$ 0.01
Loss on extinguishment of debt						$ 213,239		$ 0	$ 274,836	$ 4,331
Revenue							$ 22,000		22,000
Gain (loss) related to litigation settlement							7,500
Money market funds						136,000			136,000				$ 51,000
Guarantor obligations, current carrying value						55,000			$ 55,000				54,000
Amount awarded from other party				$ 7,500	$ 10,000
Settlement cash amount				$ 24,000
Payment term				48 months
Amount expected from sale							15,000
Proceeds from sale of equity method investments							$ 12,000
Term of customer relationship									15 years
Retained earnings (accumulated deficit)						(1,504,054)			$ (1,504,054)			$ (963,782)	(998,212)
Deferred tax liabilities						1,370,142			1,370,142			1,388,594	1,376,708
Reported Value Measurement
Debt Instrument [Line Items]
Koch Preferred Securities													682,000
Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Koch Preferred Securities													$ 925,000
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Debt Instrument [Line Items]
Loss on extinguishment of debt						0			0
Retained earnings (accumulated deficit)						51,278			51,278			34,430
Deferred tax liabilities						16,749			16,749			$ 11,886
Mandatorily Redeemable Preferred Stock
Debt Instrument [Line Items]
Mandatorily redeemable preferred securities outstanding (in shares) | shares					750,000								750,000
Mandatorily redeemable preferred securities par value (in dollars per share) | $ / shares													$ 0.01
Mandatorily Redeemable Preferred Stock | Koch
Debt Instrument [Line Items]
Payments for repurchase of trust preferred securities	$ 949,000
Payment for repurchase of trust preferred securities, premiums	103,000
Loss on extinguishment of debt						$ 213,000			213,000
Prime Notes | Senior Notes
Debt Instrument [Line Items]
Repayments of senior debt		$ 649,000
Repurchased face amount		$ 594,000
Interest rate		9.25%
Long-term debt, gross											$ 2,546,000
Loss on extinguishment of debt		$ 62,000
Affiliated Entity | Mandatorily Redeemable Preferred Stock | Koch
Debt Instrument [Line Items]
Payments of dividends	$ 96,000							$ 22,000	$ 51,000	$ 63,000
IPO
Debt Instrument [Line Items]
Shares issued in public offering (in shares) | shares					105,000,000
Shares issued, price per share (in dollars per share) | $ / shares					$ 14
Proceeds from initial public offering					$ 1,406,000

Basis of Presentation and Sum_5

Basis of Presentation and Summary of Significant Accounting Policies - Subscriber System Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Gross carrying amount	$ 4,170,741	$ 3,762,905
Accumulated depreciation	(1,264,182)	(870,222)
Subscriber system assets, net	$ 2,906,559	$ 2,892,683

Basis of Presentation and Sum_6

Basis of Presentation and Summary of Significant Accounting Policies - Subscriber System Depreciation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Subscriber system assets, depreciation expense	$ 137,488	$ 135,055	$ 410,236	$ 401,275

Basis of Presentation and Sum_7

Basis of Presentation and Summary of Significant Accounting Policies - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued interest	$ 144,886	$ 91,592
Payroll-related accruals	77,944	94,501
Other accrued liabilities	221,742	165,247
Accrued expenses and other current liabilities	$ 444,572	$ 351,340

Basis of Presentation and Sum_8

Basis of Presentation and Summary of Significant Accounting Policies - Carrying Values and Fair Values of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Reported Value Measurement
Debt Instrument [Line Items]
Debt instruments, excluding capital lease obligations	$ 9,532,794	$ 10,128,020
Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Debt instruments, excluding capital lease obligations	$ 9,840,892	$ 10,868,626

Basis of Presentation and Sum_9

Basis of Presentation and Summary of Significant Accounting Policies - Impact of New Accounting Standard on Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets
Prepaid expenses and other current assets	$ 107,364	$ 83,856	$ 77,241
Deferred subscriber acquisition costs, net		315,858
Other assets	148,242	130,288	123,967
Liabilities
Deferred tax liabilities	1,370,142	1,388,594	1,376,708
Stockholders' equity
Accumulated deficit	(1,504,054)	(963,782)	(998,212)
Calculated under Revenue Guidance in Effect before Topic 606
Assets
Prepaid expenses and other current assets	98,851		77,241
Deferred subscriber acquisition costs, net			282,478
Other assets	143,607		123,967
Liabilities
Deferred tax liabilities	1,353,393		1,376,708
Stockholders' equity
Accumulated deficit	(1,555,332)		$ (998,212)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Assets
Prepaid expenses and other current assets	8,513	6,615
Deferred subscriber acquisition costs, net		33,380
Other assets	4,635	6,321
Liabilities
Deferred tax liabilities	16,749	11,886
Stockholders' equity
Accumulated deficit	$ 51,278	$ 34,430

Basis of Presentation and Su_10

Basis of Presentation and Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 256,917	$ 122,899
Restricted cash and cash equivalents in prepaid expenses and other current assets	3,885	3,883
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 260,802	$ 126,782	$ 174,538	$ 90,893

Revenue - Additional Informatio

Revenue - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017
Revenue from Contract with Customer [Abstract]
Amortization of deferred subscriber acquisition revenue	$ 21,000	$ 56,381	$ 31,470
Amortization of deferred subscriber acquisition costs	$ 16,000	$ 42,876	$ 35,457

Revenue - Impact of New Account

Revenue - Impact of New Accounting Pronouncement on Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 1,148,316	$ 1,082,962	$ 3,396,223	$ 3,209,970
Cost of revenue (exclusive of depreciation and amortization shown separately below)	263,286	224,140	757,905	658,095
Selling, general and administrative expenses	295,119	284,137	922,627	923,048
Depreciation and intangible asset amortization	474,772	467,929	1,446,768	1,387,245
Merger, restructuring, integration, and other	(6,708)	14,505	1,770	54,170
Operating income	121,847	92,251	267,153	187,412
Interest expense, net	(152,405)	(184,369)	(501,217)	(553,529)
Loss on extinguishment of debt	(213,239)	0	(274,836)	(4,331)
Other income	552	22,960	29,374	35,965
Loss before income taxes	(243,245)	(69,158)	(479,526)	(334,483)
Income tax benefit	7,701	7,128	19,840	38,922
Net loss	(235,544)	(62,030)	(459,686)	(295,561)
Amortization of deferred subscriber acquisition costs	16,000		42,876	35,457
Calculated under Revenue Guidance in Effect before Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,148,294		3,394,895
Cost of revenue (exclusive of depreciation and amortization shown separately below)	263,286		757,905
Selling, general and administrative expenses	302,039		943,010
Depreciation and intangible asset amortization	474,772		1,446,768
Merger, restructuring, integration, and other	(6,708)		1,770
Operating income	114,905		245,442
Interest expense, net	(152,405)		(501,217)
Loss on extinguishment of debt	(213,239)		(274,836)
Other income	552		29,374
Loss before income taxes	(250,187)		(501,237)
Income tax benefit	9,123		24,703
Net loss	(241,064)		(476,534)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	22		1,328
Cost of revenue (exclusive of depreciation and amortization shown separately below)	0		0
Selling, general and administrative expenses	(6,920)		(20,383)
Depreciation and intangible asset amortization	0		0
Merger, restructuring, integration, and other	0		0
Operating income	6,942		21,711
Interest expense, net	0		0
Loss on extinguishment of debt	0		0
Other income	0		0
Loss before income taxes	6,942		21,711
Income tax benefit	(1,422)		(4,863)
Net loss	5,520		16,848
Amortization of deferred subscriber acquisition costs	5,000		14,000
Monitoring and Related Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,029,399	1,012,292	3,069,817	3,017,026
Monitoring and Related Services | Calculated under Revenue Guidance in Effect before Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,031,006		3,074,260
Monitoring and Related Services | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	(1,607)		(4,443)
Installation and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	118,917	$ 70,670	326,406	$ 192,944
Installation and Other | Calculated under Revenue Guidance in Effect before Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	117,288		320,635
Installation and Other | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 1,629		$ 5,771

Revenue - Effect of New Account

Revenue - Effect of New Accounting Pronouncement on Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets
Prepaid expenses and other current assets	$ 107,364	$ 83,856	$ 77,241
Deferred subscriber acquisition costs, net	400,946		282,478
Other assets	148,242	130,288	123,967
Liabilities
Deferred tax liabilities	1,370,142	1,388,594	1,376,708
Stockholders' equity
Accumulated deficit	(1,504,054)	(963,782)	(998,212)
Calculated under Revenue Guidance in Effect before Topic 606
Assets
Prepaid expenses and other current assets	98,851		77,241
Deferred subscriber acquisition costs, net	346,067
Other assets	143,607		123,967
Liabilities
Deferred tax liabilities	1,353,393		1,376,708
Stockholders' equity
Accumulated deficit	(1,555,332)		$ (998,212)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Assets
Prepaid expenses and other current assets	8,513	6,615
Deferred subscriber acquisition costs, net	54,879
Other assets	4,635	6,321
Liabilities
Deferred tax liabilities	16,749	11,886
Stockholders' equity
Accumulated deficit	$ 51,278	$ 34,430

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 1,148,316	$ 1,082,962	$ 3,396,223	$ 3,209,970
Monitoring and Related Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,029,399	1,012,292	3,069,817	3,017,026
Installation and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 118,917	$ 70,670	$ 326,406	$ 192,944

Acquisitions (Details)

Acquisitions (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)business	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired	$ 48,473	$ 31,810
Goodwill	5,088,325		$ 5,070,586
Dealer generated customer accounts and bulk account purchases	$ 526,654	$ 486,037
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Number of businesses acquired | business	4
Acquisition of businesses, net of cash acquired	$ 48,000
Goodwill	23,000
Series of Individually Immaterial Business Acquisitions | Customer Relationships
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 20,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Gross Carrying Amounts and Accumulated Amortization of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 9,084,584	$ 8,549,628
Accumulated Amortization	(2,929,466)	(2,025,853)
Net Carrying Amount	6,155,118	6,523,775
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	10,417,584	9,882,628
Net Carrying Amount	7,488,118	7,856,775
Trade name
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	1,333,000	1,333,000
Customer-Related Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,284,196	6,748,355
Accumulated Amortization	(2,545,113)	(1,749,327)
Net Carrying Amount	4,739,083	4,999,028
Dealer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,603,490	1,605,910
Accumulated Amortization	(209,915)	(146,299)
Net Carrying Amount	1,393,575	1,459,611
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	196,898	195,363
Accumulated Amortization	(174,438)	(130,227)
Net Carrying Amount	$ 22,460	$ 65,136

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Additional Information (Details)	9 Months Ended
	Sep. 30, 2018
Customer-Related Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	15 years

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Changes in Net Carrying Amount of Contracts and Related Customer Relationships (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Finite-lived Intangible Assets [Roll Forward]
Balance as of beginning of period			$ 6,523,775
Amortization	$ (293,535)	$ (292,023)	(906,233)	$ (864,918)
Balance as of end of period	6,155,118		6,155,118
Customer-Related Intangible Assets
Finite-lived Intangible Assets [Roll Forward]
Balance as of beginning of period			4,999,028
Amortization			(798,267)
Currency translation and other			(7,653)
Balance as of end of period	$ 4,739,083		4,739,083
Customer Relationships
Finite-lived Intangible Assets [Roll Forward]
Customer contract additions, net of dealer charge-backs			20,246
Contract-Based Intangible Assets
Finite-lived Intangible Assets [Roll Forward]
Customer contract additions, net of dealer charge-backs			$ 525,729

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Finite-lived Intangible Assets Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Definite-lived intangible asset amortization expense	$ 293,535	$ 292,023	$ 906,233	$ 864,918

Goodwill and Other Intangible_7

Goodwill and Other Intangible Assets - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) $ in Thousands	Sep. 30, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2018	$ 295,632
2,019	1,143,309
2,020	1,089,492
2,021	987,260
2,022	640,412
2,023	$ 284,929

Debt (Details)

Debt (Details) - USD ($)	Feb. 21, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Mar. 15, 2018	Feb. 22, 2018
Debt Instrument [Line Items]
Loss on extinguishment of debt		$ 213,239,000	$ 0	$ 274,836,000	$ 4,331,000
2021 Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 255,000,000
2020 Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 95,000,000
2023 Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		350,000,000		350,000,000
Remaining borrowing capacity		$ 350,000,000		$ 350,000,000
2023 Revolving Credit Facility | Revolving Credit Facility | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Variable rate on which basis spread is calculated				0.50%
2023 Revolving Credit Facility | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Variable rate on which basis spread is calculated				1.00%
Basis spread on variable rate				2.75%
2023 Revolving Credit Facility | Revolving Credit Facility | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.75%
2023 Revolving Credit Facility | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Commitment fee percentage				0.375%
2023 Revolving Credit Facility | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Commitment fee percentage				0.50%
Prime Notes | Senior Notes
Debt Instrument [Line Items]
Repayments of senior debt	$ 649,000,000
Repurchased face amount	594,000,000
Loss on extinguishment of debt	$ 62,000,000
Long-term debt, gross							$ 2,546,000,000

Mandatorily Redeemable Prefer_2

Mandatorily Redeemable Preferred Securities (Details) - USD ($) $ in Thousands	Jul. 02, 2018	May 08, 2018	Jan. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Loss on extinguishment of debt				$ 213,239	$ 0	$ 274,836	$ 4,331
Mandatorily Redeemable Preferred Stock
Related Party Transaction [Line Items]
Financial instruments subject to mandatory redemption, settlement terms, number of shares (in shares)								750,000
Increase (decrease) in restricted cash			$ 750,000
Dividend rate plus 5-year treasury rate						9.00%
Dividend rate plus 5-year treasury rate if dividend is not paid						9.75%
Mandatorily Redeemable Preferred Stock | Koch
Related Party Transaction [Line Items]
Face amount	$ 750,000
Payments for repurchase of trust preferred securities	949,000
Payment for Repurchase of Trust Preferred Securities, Premiums and Tax	103,000
Loss on extinguishment of debt				$ 213,000		$ 213,000
Maximum distribution amount in event of common stock dividend		$ 27,000	$ 50,000
Mandatorily Redeemable Preferred Stock | Koch | Affiliated Entity
Related Party Transaction [Line Items]
Payments of dividends	$ 96,000				$ 22,000	$ 51,000	$ 63,000

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, increase	$ 13,000
Income tax benefit	$ 7,701	$ 7,128	$ 19,840	$ 38,922
Effective tax rate	3.20%	10.30%	4.10%	11.60%
Preferred securities, tax impact	11.20%		11.60%
State and local income taxes, tax impact	4.90%		4.20%
Change in unrecognized tax benefits, tax impact	5.60%
Share-based compensation cost, tax impact			7.30%
Prior year taxes, tax impact			5.60%

Commitments and Contingencies (

Commitments and Contingencies (Details)	9 Months Ended
	Sep. 30, 2018USD ($)claim	Jan. 19, 2018claim	Sep. 30, 2017USD ($)
Loss Contingencies [Line Items]
Indefinite-lived trademarks | $			$ 987,000,000
Wireless Encryption Litigation
Loss Contingencies [Line Items]
Number of claims	5
Wireless Encryption Litigation, Federal
Loss Contingencies [Line Items]
Number of claims	3
Wireless Encryption Litigation, State
Loss Contingencies [Line Items]
Number of claims	2
Shareholder Litigation
Loss Contingencies [Line Items]
Number of claims		5
Tyco International
Loss Contingencies [Line Items]
Liability threshold | $	$ 500,000,000
Tax liability sharing percent	27.00%

Derivative Financial Instrume_2

Derivative Financial Instruments (Details) - USD ($) $ in Billions	Sep. 30, 2018	Aug. 31, 2018	Jun. 30, 2018	Apr. 30, 2017
Derivative [Line Items]
Derivative, notional amount	$ 3.5
Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount		$ 1	$ 1.5
Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount				$ 1

Share-based Compensation - Addi

Share-based Compensation - Additional Information (Details) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended			9 Months Ended
	Jan. 31, 2018shares	Sep. 30, 2018USD ($)shares	Mar. 31, 2018$ / sharesshares	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)tranche$ / sharesshares	Sep. 30, 2017USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $		$ 18,000		$ 4,000	$ 112,905	$ 8,498
Common Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of tranches | tranche					2
Shares issued (in shares)			20.6
Number of nonvested shares (in shares)			17.8
Percent with service award vesting conditions			50.00%
Percent with performance award vesting conditions			50.00%
Risk free interest rate			2.43%
Expected volatility rate			30.00%
2016 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $		$ 0		0	$ 0	0
Initial Public Offering, Performance Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of nonvested shares (in shares)		10.2			10.2
Grant date fair value (in dollars per share) | $ / shares			$ 12.97
Service period			3 years
Share-based compensation expense | $		$ 6,000			$ 29,000
Initial Public Offering, Performance Tranche | Common Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					5 years
Top-up Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	2.43%
Expected volatility rate	30.00%
Service period	3 years
Options, granted in period (in shares)	12.7
Contractual term	10 years
Expected dividend yield	1.00%
Initial Public Offering, Service Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value (in dollars per share) | $ / shares			$ 14
Share-based compensation expense | $		2,000			$ 28,000
Top-up Options, Service-based
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $		2,000			$ 32,000
Weighted average fair value (in dollars per share) | $ / shares					$ 5.02
Top-up Options, Performance-based
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $		$ 2,000			$ 7,000
Weighted average fair value (in dollars per share) | $ / shares					$ 5.04
Nonvested options outstanding (in shares)		6.3			6.3
2018 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					3 years
Share-based compensation expense | $		$ 0		$ 0	$ 0	$ 0
Contractual term			10 years
2018 Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate			2.52%
Expected volatility rate			30.00%
Options, granted in period (in shares)			4
Expected dividend yield			1.00%
Weighted average fair value (in dollars per share) | $ / shares			$ 4.35
Nonvested options outstanding (in shares)		3.8			3.8
Expected average exercise term			6 years 6 months
2018 RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of nonvested shares (in shares)		1			1
Grant date fair value (in dollars per share) | $ / shares			$ 14
RSUs granted in period (in shares)			1.1

Equity - Schedule of Dividends

Equity - Schedule of Dividends Declared (Details) - $ / shares	Aug. 08, 2018	May 09, 2018	Mar. 15, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Equity [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 0.035	$ 0.035	$ 0.035	$ 0.035	$ 0	$ 0.105	$ 1.170

Equity - Additional Information

Equity - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Payments of dividends	$ 52,959	$ 749,999
Accumulated deficit	(1,504,054)		$ (963,782)	$ (998,212)
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	$ 51,278		$ 34,430

Net Loss per Share - Computatio

Net Loss per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net loss	$ (235,544)	$ (62,030)	$ (459,686)	$ (295,561)
Denominator:
Weighted-average number of shares outstanding, basic and diluted (in shares)	755,277	641,088	744,720	641,061
Net loss per share, basic and diluted (in dollars per share)	$ (0.31)	$ (0.10)	$ (0.62)	$ (0.46)

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Related Party Transaction [Line Items]
Payments of dividends		$ 52,959	$ 749,999
Management | Apollo Management Holdings, L.P.
Related Party Transaction [Line Items]
Management fee expense	$ 5,000	1,000	15,000
Management | Prime Security Services TopCo Parent, LP [Member]
Related Party Transaction [Line Items]
Payments of dividends			750,000
Affiliated Entity | Koch | Structuring Fees
Related Party Transaction [Line Items]
Amounts of transaction			45,000
Affiliated Entity | Apollo Global Securities, LLC
Related Party Transaction [Line Items]
Payments of stock issuance costs		$ 2,000
Amounts of transaction			$ 1,000
Affiliated Entity | Apollo Global Securities, LLC | Over-Allotment Option
Related Party Transaction [Line Items]
Shares issued in public offering (in shares)		4,200,000

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	Nov. 07, 2018	Oct. 24, 2018	Aug. 08, 2018	May 09, 2018	Mar. 15, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Subsequent Event [Line Items]
Cash dividends declared per common share (in dollars per share)			$ 0.035	$ 0.035	$ 0.035	$ 0.035	$ 0	$ 0.105	$ 1.170
Subsequent Event
Subsequent Event [Line Items]
Cash dividends declared per common share (in dollars per share)	$ 0.035
Red Hawk Fire & Security | Subsequent Event
Subsequent Event [Line Items]
Payments to acquire businesses, gross		$ 317,500,000
First Lien Credit Agreement | Subsequent Event
Subsequent Event [Line Items]
Maximum borrowing capacity		$ 317,500,000