Borrowings (Narrative) (Details) | 3 Months Ended | 9 Months Ended | | | | | | | | | | | | |
Sep. 29, 2022 USD ($) | Sep. 30, 2021 USD ($) | Sep. 29, 2022 USD ($) | Sep. 30, 2021 USD ($) | Dec. 28, 2023 | Sep. 28, 2023 | Jun. 29, 2023 | Mar. 30, 2023 | Jun. 30, 2022 USD ($) | Jan. 05, 2022 USD ($) | Dec. 30, 2021 USD ($) | Mar. 08, 2021 USD ($) | Dec. 31, 2020 USD ($) | Mar. 18, 2020 USD ($) | Oct. 08, 2019 USD ($) | Aug. 19, 2016 USD ($) |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Document Period End Date | | | Sep. 29, 2022 | | | | | | | | | | | | | |
Line of Credit, Covenant, Maximum Senior Secured Leverage Ratio | | | $ 39,000,000 | | | | | | | | | | | | | |
Term Loan - Second Tranche, net | | | | | | | | | | | | $ 43,000,000 | | | | |
Term Loan - Second Tranche, Discount Value | | | | | | | | | | | | 2,300,000 | | | | |
Term Loan - Second Tranche, Debt Issuance Costs | | | | | | | | | | | | 3,900,000 | | | | |
Term Loan - Second Tranche Loss on Debt Modification | | | | | | | | | | | | $ 800,000 | | | | |
Carrying value of long-term debt | $ 901,000,000 | | 901,000,000 | | | | | | | | $ 1,094,300,000 | | | | | |
Gain on re-measurement of the payable to founding members under the tax receivable agreement | 2,200,000 | $ 1,800,000 | (4,000,000) | $ 3,200,000 | | | | | | | | | | | | |
Unrestricted Cash and Cash Equivalent | 100,000,000 | | 100,000,000 | | | | | | | | | | | | | |
Revolving Credit Facility, Debt Draw | | | | | | | | | | | | | | $ 110,000,000 | | |
Gain (Loss) on Extinguishment of Debt | | | 6 | | | | | | | | | | | | | |
Credit Agreement Third Agreement | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Issuance Costs, Line of Credit Arrangements, Gross | | | | | | | | | | $ 6.4 | | | | | | |
Loss on the Modification of Debt | | | | | | | | | | $ 0.4 | | | | | | |
Senior secured notes due 2028 | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt instrument face amount | | | | | | | | | | | | | | | $ 400,000,000 | |
Stated interest rate | | | | | | | | | | | | | | | 5.875% | |
Debt instrument issued percentage of face value | | | | | | | | | | | | | | | 100% | |
NCM, LLC. | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, carrying value | 1,129,800,000 | | 1,129,800,000 | | | | | | | | 1,108,000,000 | | | | | |
Carrying value of long-term debt | 901,000,000 | | 901,000,000 | | | | | | | | 1,094,300,000 | | | | | |
Long-term Debt | $ 1,121,200,000 | | 1,121,200,000 | | | | | | | | 1,097,500,000 | | | | | |
NCM, LLC. | Senior secured notes due 2022 | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt instrument, frequency of periodic payment | The Notes due 2022 pay interest semi-annually in arrears on April 15 and October 15 of each year, which commenced on October 15, 2012. | | | | | | | | | | | | | | | |
NCM, LLC. | Senior secured notes due 2028 | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, carrying value | $ 230,000,000 | | $ 230,000,000 | | | | | | | | 230,000,000 | | | | | |
Debt instrument face amount | | | | | | | | | | | | | | | | $ 250,000,000 |
Stated interest rate | 5.75% | | 5.75% | | | | | | | | | | | | | 5.75% |
Debt instrument, frequency of periodic payment | The Notes due 2026 pay interest semi-annually in arrears on February 15 and August 15 of each year, which commenced on February 15, 2017. | | | | | | | | | | | | | | | |
Debt instrument issued percentage of face value | | | | | | | | | | | | | | | | 100% |
Debt instrument, repurchase amount | | | | | | | | | | | | | $ 20,000,000 | | | |
NCM, LLC. | Senior secured notes due 2028 | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, carrying value | $ 374,200,000 | | $ 374,200,000 | | | | | | | | 400,000,000 | | | | | |
NCM, LLC. | Senior unsecured notes due 2026 | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Stated interest rate | 5.875% | | 5.875% | | | | | | | | | | | | | |
Debt instrument, repurchase amount | | | | | | | | | $ 25.8 | | | | | | | |
NCM, LLC. | Term loans - first tranche | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, carrying value | | | | | | | | | | | 261,200,000 | | | | | |
Weighted-average interest rate | 6.56% | | 6.56% | | | | | | | | | | | | | |
Carrying value of long-term debt | $ 259,200,000 | | $ 259,200,000 | | | | | | | | | | | | | |
Repayments of Debt, Maturing in More than Three Months | | | 600,000 | | | | | | | | | | | | | |
NCM, LLC. | Term loans - first tranche | LIBOR | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Basis spread on variable rate, percent | 3% | | | | | | | | | | | | | | | |
NCM, LLC. | Term loans - first tranche | Base Rate | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Basis spread on variable rate, percent | 2% | | | | | | | | | | | | | | | |
NCM, LLC. | Term Loan -Second Tranche | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, carrying value | $ 49,400,000 | | $ 49,400,000 | | | | | | | | $ 49,800,000 | | | | | |
Weighted-average interest rate | 10.56% | | 10.56% | | | | | | | | | | | | | |
Amortization rate | 1% | | | | | | | | | | | | | | | |
Repayments of Debt, Maturing in More than Three Months | | | $ 10,800,000 | | | | | | | | | | | | | |
Other Long-Term Debt | $ 50,000,000 | | 50,000,000 | | | | | | | | | | | | | |
NCM, LLC. | Term Loan -Second Tranche | LIBOR | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Basis spread on variable rate, percent | 8% | | | | | | | | | | | | | | | |
NCM, LLC. | Revolving credit facility 2018 | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Unused line fee, percent | 0.50% | | | | | | | | | | | | | | | |
NCM, LLC. | Covenant During Waiver Min [Member] | Senior Secured Credit Facility | Credit Agreement Third Agreement | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Net total leverage ratio, covenant | | | | | 6.25 | 8 | 8.50 | 9.25 | | | | | | | | |
Net senior secured leverage ratio | | | | | 4.50 | 6 | 6.50 | 7.25 | | | | | | | | |
NCM, LLC. | Initial Credit Agreement | LIBOR | Minimum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | 1.75% | | | | | |
NCM, LLC. | Initial Credit Agreement | LIBOR | Maximum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | 2.25% | | | | | |
NCM, LLC. | Initial Credit Agreement | Base Rate | Minimum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | 0.75% | | | | | |
NCM, LLC. | Initial Credit Agreement | Base Rate | Maximum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | 1.25% | | | | | |
NCM, LLC. | Credit Agreement Second Amendment | LIBOR | Minimum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | | 2.75% | | | | |
NCM, LLC. | Credit Agreement Second Amendment | Base Rate | Minimum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | | 1.75% | | | | |
NCM, LLC. | RevolvingCreditFacilityMember2018 | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Borrowing amount of credit facility | $ 175,000,000 | | 175,000,000 | | | | | | | | | | | | | |
Debt Instrument, carrying value | 167,000,000 | | 167,000,000 | | | | | | | | $ 167,000,000 | | | | | |
Remaining borrowing capacity of credit facility | $ 6,800,000 | | $ 6,800,000 | | | | | | | | | | | | | |
Weighted-average interest rate | 6.18% | | 6.18% | | | | | | | | | | | | | |
NCM, LLC. | RevolvingCreditFacilityMember2018 | Letter of Credit | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Outstanding letters of credit | $ 1,200,000 | | $ 1,200,000 | | | | | | | | | | | | | |
NCM, LLC. | Covenant During Waiver Max | Senior Secured Credit Facility | Credit Agreement Third Agreement | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Net total leverage ratio, covenant | | | | | 1 | 1 | 1 | 1 | | | | | | | | |
Net senior secured leverage ratio | | | | | 1 | 1 | 1 | 1 | | | | | | | | |
NCM, LLC. | Credit Agreement Third Agreement | LIBOR | Minimum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | | 2% | | | | |
NCM, LLC. | Credit Agreement Third Agreement | Base Rate | Minimum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | | 1% | | | | |
NCM, LLC. | RevolvingCreditFacilityMember2022 | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Borrowing amount of credit facility | 50,000,000 | | 50,000,000 | | | | | | | | | | | | | |
Debt Instrument, carrying value | 50,000,000 | | 50,000,000 | | | | | | | | $ 0 | | | | | |
Remaining borrowing capacity of credit facility | $ 0 | | $ 0 | | | | | | | | | | | | | |
Weighted-average interest rate | 10.86% | | 10.86% | | | | | | | | | | | | | |
NCM, LLC. | RevolvingCreditFacilityMember2022 | Base Rate | Minimum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | | 1% | | | | |
NCM, LLC. | RevolvingCreditFacilityMember2022 | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | | | | 8% | | | | |
NCM, LLC. | Financial Ratio Requirement | Senior Secured Credit Facility | Credit Agreement Third Agreement | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Net total leverage ratio, covenant | | | | | | | | 6.25 | | | | | | | | |
Net senior secured leverage ratio | | | | | | | | 4.50 | | | | | | | | |
NCM, LLC. | Available Cash Requirement, Covenant During Waiver Min | Senior Secured Credit Facility | Credit Agreement Third Agreement | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Net senior secured leverage ratio | | | | | | | | 4 | | | | | | | | |
NCM, LLC. | Available Cash Requirement, Covenant During Waiver Max | Senior Secured Credit Facility | Credit Agreement Third Agreement | | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | | |
Net senior secured leverage ratio | | | | | | | | 1 | | | | | | | | |