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New Accounting Pronouncement and Changes in Accounting or Estimates (Tables)
 9 Months Ended
Sep. 30, 2016
Change in Accounting Estimate [Line Items]  
Schedule of New Changes in Accounting Principles - Chase Agreement
The estimated impacts on revenue and earnings associated with the Agreement and this change in accounting principle for the nine months ended September 30, 2016, which only include amounts through June 30, 2016 as the impact of the accounting change for third quarter 2016 was comparable to that recognized in third quarter 2015, are as follows:

(in millions, except per share amounts)
Nine months ended September 30, 2016
Passenger revenue
$
(120
)
Other revenue
381

Operating revenues
$
261

Net income
$
139

Net income per basic share
$
0.22

Net income per diluted share
$
0.22
Schedule of Change in Accounting Estimate - Depreciation
The estimated impacts on expense and earnings from this change in assumption for the three and nine months ended September 30, 2016 are as follows:

(in millions, except per share amounts)
Three months ended September 30, 2016
 
Nine months ended September 30, 2016
Depreciation and amortization expense
$
31

 
$
94

Net income
$
(17
)
 
$
(50
)
Net income per basic share
$
(0.03
)
 
$
(0.08
)
Net income per diluted share
$
(0.03
)
 
$
(0.08
)