Leases Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	1 Months Ended
Jan. 01, 2015	Dec. 26, 2013	Dec. 27, 2012	Dec. 31, 1995 Property
Operating Leased Assets [Line Items]
Period that must be exceeded to qualify for disclosure as a noncancelable operating lease (in years)	1 year
Sale and leaseback rentals	$ 15.2	$ 15.1	$ 15.1
Minimum rental expense	33.2	34.9	35.6
Contingent rent expense	0.8	1.1	1.0
UATC
Operating Leased Assets [Line Items]
Number of properties				31
Number of theatres	11
Pass through certificates, principal outstanding	$ 7.7

Represent the period that must be exceeded to qualify for disclosure as a noncancelable operating lease.

No definition available.

Name:	uatc_OperatingLeasesPeriodToBeExceeded
Namespace Prefix:	uatc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of properties sold under the sale and leaseback transaction to an unaffiliated third party.

+ References

No definition available.

+ Details

Name:	uatc_SaleLeasebackTransactionNumberOfProperties
Namespace Prefix:	uatc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of theatres subject to the sale leaseback transaction as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	uatc_SaleLeasebackTransactionNumberOfTheatres
Namespace Prefix:	uatc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The principal amount of pass-through certificates outstanding as of the balance sheet date, held in conjunction with the sales and leaseback transaction.

+ References

No definition available.

+ Details

Name:	uatc_SaleLeasebackTransactionPassThroughCertificatesPrincipalOutstanding
Namespace Prefix:	uatc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_OperatingLeasedAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The increases or decreases in lease payments that result from changes occurring after the inception of the lease in the factors (other than the passage of time) on which lease payments are based, except that any escalation of minimum lease payments relating to increases in construction or acquisition cost of the leased property or for increases in some measure of cost or value during the construction or preconstruction period, are excluded from contingent rentals. Contingent rentals also may include amounts for which the triggering events have not yet occurred or the specified targets for which have not yet been achieved (such as sales based percentage rent), but which events are considered probable of occurring or which specified targets are considered probable of being achieved.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Rentals

-URI http://asc.fasb.org/extlink&oid=6508509

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6452660&loc=d3e36991-112694

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 40

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6452616&loc=d3e36728-112689

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 25

-Paragraph 35

-URI http://asc.fasb.org/extlink&oid=7579899&loc=d3e35050-112683

+ Details

Name:	us-gaap_OperatingLeasesRentExpenseContingentRentals
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 25

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=7661868&loc=d3e34039-112682

+ Details

Name:	us-gaap_OperatingLeasesRentExpenseMinimumRentals
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the current period expense recorded for use of the property in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

+ Details

Name:	us-gaap_SaleLeasebackTransactionRentExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=uatc_UnitedArtistsTheatreCircuitIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: