cash consideration per each issued and outstanding share of common stock

No definition available.

Name:	lvlt_Cashconsiderationpershare
Namespace Prefix:	lvlt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

percentage of ownership of common stock

+ References

No definition available.

+ Details

Name:	lvlt_Percentageofownershipofcommonstock
Namespace Prefix:	lvlt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

ratio of conversion of each issued and outstanding share of common stock of an acquiree company to shares of the acquirer company common stock

+ References

No definition available.

+ Details

Name:	lvlt_Stockconversionratio
Namespace Prefix:	lvlt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the business acquisition agreement was executed, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Definition

Face amount or stated value per share of common stock.

+ 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(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_BusinessAcquisitionAxis=lvlt_CenturyLinkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

CenturyLink Merger (Details) - USD ($)	3 Months Ended
CenturyLink Merger (Details) - USD ($)	Dec. 31, 2016	Oct. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Common stock, par value	$ 0.01		$ 0.01
CenturyLink [Member]
Business Acquisition [Line Items]
Business Acquisition, Date of Acquisition Agreement	Oct. 31, 2016
stock conversion ratio		1.4286
Common stock, par value		$ 1.00
cash consideration per share		$ 26.50
percentage of ownership of common stock		18.00%