Rendering

Component: (Network and Table)
Network
41802 - Disclosure - Fair Value of Financial Instruments (Changes In Fair Value Of Plan's Level 3 Assets) (Details)
(http://frontier.com/role/DisclosureFairValueOfFinancialInstrumentsChangesInFairValueOfPlanSLevel3AssetsDetails)
TableFair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000020520 (http://www.sec.gov/CIK)
Investment Type [Axis]Interest in Limited Partnerships and Limited Liability Companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Balance, beginning of year
92,000,000  
103,000,000  
Realized gains
7,000,000  
8,000,000  
Unrealized (losses)
13,000,000  
(11,000,000) 
Purchases
15,000,000  
 
Sales and distributions
(9,000,000) 
(8,000,000) 
Balance, end of year
118,000,000  
 
92,000,000