Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Data [Abstract]

Quarterly Financial Information

($ in millions, except per share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total Year
2016
Revenue	$	1,355	$	2,608	$	2,524	$	2,409	$	8,896
Operating income		58		311		264		255		888
Net loss attributable to Frontier
common shareholders		(240)		(80)		(134)		(133)		(587)
Basic net loss per share attributable
to Frontier common shareholders	$	(0.21)	$	(0.07)	$	(0.12)	$	(0.12)	$	(0.51)

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total Year
2015
Revenue	$	1,371	$	1,368	$	1,424	$	1,413	$	5,576
Operating income		163		193		207		182		745
Net loss attributable to Frontier
common shareholders		(51)		(28)		(81)		(156)		(316)
Basic net loss per share attributable
to Frontier common shareholders	$	(0.05)	$	(0.03)	$	(0.07)	$	(0.14)	$	(0.29)