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Defined Contribution Plan, Employer Matching Contribution, Percent of Match above 50% from Annual Bonus

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Defined Contribution Plan, Employer Matching Contribution, Percent of Match up to 50% from Annual Bonus

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested but were not issued.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. The equity award is vested but not issued.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Change in units based on approved performance factors

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Change in units based on approved performance factors, Weighted Average Grant Date Fair Value

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Percentage of vesting of share-based compensation awards.

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Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Stock-Based Compensation - U.S. Cellular, Nonvested shares and other stock compensation disclosures (Details) - Common Shares - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S. Cellular Long-Term Incentive Plans \| Restricted Stock Units
Stock based compensation, Nonvested shares rollforward, number of shares
Nonvested stock units, beginning of period - Number of shares (in shares)	1,483,000
Granted number of shares (in shares)	559,000
Vested number of shares (in shares)	(395,000)
Forfeited number of shares (in shares)	(78,000)
Nonvested stock units, end of period - Number of shares (in shares)	1,569,000	1,483,000
Stock based compensation, Nonvested shares weighted average grant date fair value
Nonvested stock units - beginning of period weighted average grant date fair value (USD per share)	$ 39.67
Granted weighted average grant date fair value (USD per share)	38.19	$ 38.04	$ 43.32
Vested weighted average grant date fair value (USD per share)	37.30
Forfeited weighted average grant date fair value (USD per share)	39.78
Nonvested stock units - end of period weighted average grant date fair value (USD per share)	$ 39.74	$ 39.67
Shares issued and granted under stock compensation plans
Fair value of vested stock units	$ 16,000,000	$ 11,000,000	$ 15,000,000
Award vesting period	3 years
U.S. Cellular Long-Term Incentive Plans \| Performance Shares
Stock based compensation, Nonvested shares rollforward, number of shares
Nonvested stock units, beginning of period - Number of shares (in shares)	342,000
Granted number of shares (in shares)	357,000
Change in units based on approved performance factors number of shares	111,000
Forfeited number of shares (in shares)	(42,000)
Nonvested stock units, end of period - Number of shares (in shares)	768,000	342,000
Stock based compensation, Nonvested shares weighted average grant date fair value
Nonvested stock units - beginning of period weighted average grant date fair value (USD per share)	$ 36.92
Granted weighted average grant date fair value (USD per share)	38.81	$ 36.92
Change in units based on approved performance factors weighted average grant date fair value	36.92
Forfeited weighted average grant date fair value (USD per share)	37.37
Nonvested stock units - end of period weighted average grant date fair value (USD per share)	$ 37.78	$ 36.92
Shares issued and granted under stock compensation plans
Fair value of vested stock units	$ 0	$ 0
U.S. Cellular Long-Term Incentive Plans \| Performance Shares \| Minimum
Shares issued and granted under stock compensation plans
Performance share awards target	50.00%
U.S. Cellular Long-Term Incentive Plans \| Performance Shares \| Maximum
Shares issued and granted under stock compensation plans
Performance share awards target	200.00%
U.S. Cellular Long-Term Incentive Plans \| Deferred Compensation Stock Units
Stock based compensation, Nonvested shares weighted average grant date fair value
Granted weighted average grant date fair value (USD per share)	$ 40.72	$ 36.02	$ 41.31
Shares issued and granted under stock compensation plans
Percent of match up to 50% from annual bonus	25.00%
Percent of employee contribution to get 33 percent match	50.00%
Percent of match above 50% from annual bonus	33.00%
Award vesting period	3 years
Vested number of shares, unissued	33,000
Vested number of shares, unissued, fair value	$ 2,000,000
U.S. Cellular Long-Term Incentive Plans \| Deferred Compensation Stock Units \| Maximum
Shares issued and granted under stock compensation plans
Fair value of vested stock units	$ 1,000,000	$ 1,000,000	$ 1,000,000
Non-Employee Directors' Plan \| U.S. Cellular
Shares issued and granted under stock compensation plans
Shares issued	18,000	15,000	13,000