Debt instruments maturity year.

No definition available.

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Namespace Prefix:	cot_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13476-108611

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Amount, after accumulated amortization, of debt premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Details

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Data Type:	na
Balance Type:
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- Details

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Balance Type:
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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

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Debt - Components of Debt (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Apr. 01, 2017	Dec. 31, 2016	Mar. 22, 2017	Dec. 12, 2014
Debt Instrument [Line Items]
Outstanding aggregate principal amount	$ 2,718.2	$ 2,227.1
6.750% Senior Notes Due in 2020 [Member]
Debt Instrument [Line Items]
Interest rate on notes	6.75%
Debt instrument maturity year	2020	2020
Outstanding aggregate principal amount	$ 422.7	$ 625.0
10.000% Senior Notes Due in 2021 [Member]
Debt Instrument [Line Items]
Interest rate on notes	10.00%
Debt instrument maturity year	2021	2011
Outstanding aggregate principal amount	$ 382.6	$ 384.2
10.000% Senior Notes Due in 2021 [Member] \| DSS Group Inc [Member]
Debt Instrument [Line Items]
Interest rate on notes	10.00%
Outstanding aggregate principal amount	$ 350.0
Debt instrument fair value				$ 406.0
Debt instrument, amortization of premium	$ 32.6	$ 34.2		$ 56.0
Debt Instrument effective interest rate	7.515%
5.375% Senior Notes Due in 2022 [Member]
Debt Instrument [Line Items]
Interest rate on notes	5.375%
Debt instrument maturity year	2022	2022
Outstanding aggregate principal amount	$ 525.0	$ 525.0
5.500% Senior Notes Due in 2024 [Member]
Debt Instrument [Line Items]
Interest rate on notes	5.50%
Debt instrument maturity year	2024	2024
Outstanding aggregate principal amount	$ 480.7	$ 474.1
5.500% Senior Notes Due in 2025 [Member]
Debt Instrument [Line Items]
Interest rate on notes	5.50%
Debt instrument maturity year	2025	2025
Outstanding aggregate principal amount	$ 750.0		$ 750.0