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Debt (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2021	Jan. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jul. 31, 2021	Jul. 02, 2021	Dec. 31, 2020	Feb. 01, 2020
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount (Premium), Net				$ (18,318)			$ (18,318)				$ (19,993)
Debt Issuance Costs, Net				(60,017)			(60,017)				(64,638)
Accretion of Purchase Accounting, Fair Value Adjustment, Debt				(175,698)			(175,698)				(188,740)
Long-term Debt and Lease Obligation, Including Current Maturities				9,561,972			9,561,972				9,492,544
Long-term Debt, Current Maturities				(90,777)			(90,777)				(44,764)
Long-term Debt, Excluding Current Maturities				9,471,195			9,471,195				9,447,780
ReceivablesFacilityMaximumLimit				200,000			200,000
Loss on extinguishment of debt				0		$ 0	156	$ 65,843
Variable Interest Entity, Primary Beneficiary [Member]
Debt Instrument [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount				193,000			193,000				109,000
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount				193,000			193,000				109,000
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Capital Lease Obligations				63,783			63,783				61,328
2023 Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Month-end Outstanding Amount	$ 0
Line of Credit Facility, Remaining Borrowing Capacity				$ 400,000			$ 400,000
Prime Notes | Secured Debt
Debt Instrument [Line Items]
Repurchased face amount												$ 1,200,000
ADT Notes due 2022 [Member] | Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest rate				3.50%			3.50%
Aggregate principal amount				$ 1,000,000			$ 1,000,000
ADT Notes due 2022 [Member] | Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross				$ 1,000,000			$ 1,000,000				1,000,000
ADT Notes due 2023 [Member] | Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest rate				4.125%			4.125%
ADT Notes due 2023 [Member] | Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross				$ 700,000			$ 700,000				700,000
ADT Notes due 2032 [Member] | Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest rate				4.875%			4.875%
ADT Notes due 2032 [Member] | Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross				$ 728,016			$ 728,016				728,016
ADT Notes due 2042 [Member] | Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest rate				4.875%			4.875%
ADT Notes due 2042 [Member] | Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross				$ 21,896			$ 21,896				21,896
First Priority Senior Secured Notes due 2024 [Member] | Secured Debt
Debt Instrument [Line Items]
Interest rate				5.25%			5.25%
Long-term debt, gross				$ 750,000			$ 750,000				750,000
First Priority Senior Secured Notes due 2026 [Member] | Secured Debt
Debt Instrument [Line Items]
Interest rate				5.75%			5.75%
Long-term debt, gross				$ 1,350,000			$ 1,350,000				1,350,000
First Lien Term Loan due 2026 [Member] [Member] | Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross				$ 2,771,953			2,771,953				2,778,900
Debt Instrument, Periodic Payment							$ 7,000
Prepayment premium percentage			1.00%
Second Lien Notes Due 2028 | Secured Debt
Debt Instrument [Line Items]
Interest rate				6.25%			6.25%
Long-term debt, gross				$ 1,300,000			$ 1,300,000				1,300,000
Receivables Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity				70,000			$ 70,000
Debt Instrument, Maturity Date							Mar. 04, 2022
Long-term Debt				130,000			$ 130,000				76,000
Receivables Facility [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Month-end Outstanding Amount					$ 76,000		130,000
Receivables Facility [Member] | Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross				$ 130,357			$ 130,357				75,775
Receivables Facility [Member] | London Interbank Offered Rate (LIBOR) | Secured Debt
Debt Instrument [Line Items]
Basis spread on variable rate		0.85%			1.00%
First Lien Notes due 2027 [Member] | Secured Debt
Debt Instrument [Line Items]
Interest rate				3.375%			3.375%
Long-term debt, gross				$ 1,000,000			$ 1,000,000				$ 1,000,000
First Lien Credit Agreement | Line of Credit
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Percent			0.25%
Variable rate basis, floor			0.75%		1.00%
First Lien Credit Agreement | London Interbank Offered Rate (LIBOR) | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate			2.75%		3.25%
Subsequent Event | 2023 Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity										$ 575,000
Line of Credit Facility, Description										$ 175,000
Subsequent Event | ADT Notes due 2022 [Member] | Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest rate									3.50%
Subsequent Event | 4.125% First-Priority Senior Secured Notes | Secured Debt
Debt Instrument [Line Items]
Interest rate									4.125%
Aggregate principal amount									$ 1,000,000

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