Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

Quarterly Financial Data (Unaudited)

Pursuant to Article 3 of the SEC’s Regulation S-X, the following are selected quarterly financial data:

Fiscal Year Ended December 2017 (a)	Quarters
(Dollars in Millions, Except Per Share Amounts)	1st		2nd		3rd		4th		Full Year
Revenue	$	2,869	$	2,933	$	2,743	$	2,863	$	11,408
Operating Income	712		958		876		1,121		3,667
Net Earnings (b)	362		510		459		4,140		5,471
Earnings Per Share, Basic (b)	$	0.39	$	0.55	$	0.51	$	4.63	$	6.01
Earnings Per Share, Assuming Dilution (b)	0.39		0.55		0.51		4.62		5.99
Fiscal Year Ended December 2016 (a)
Revenue	$	2,618	$	2,704	$	2,710	$	3,037	$	11,069
Operating Income	704		840		841		1,004		3,389
Net Earnings	356		445		455		458		1,714
Earnings Per Share, Basic	$	0.37	$	0.47	$	0.48	$	0.49	$	1.81
Earnings Per Share, Assuming Dilution	0.37		0.47		0.48		0.49		1.81

(a) Prior to third quarter 2017, CSX followed a 52/53 week fiscal reporting calendar and 2016 included 53 weeks. All 2016 information presented in Results of Operations is on a 53-week basis, under Generally Accepted Accounting Principles ("GAAP"). See Note 1, Nature of Operations and Significant Accounting Policies for details regarding the number of days in each quarterly period presented.

(b) These results for fourth quarter and full year 2017 include a $3.6 billion, or $3.91 per share, net tax reform benefit. See further discussion in Note 11, Income Taxes.