Operating Segments and Related Disclosures (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Operating revenues by geographic region

Operating revenues by geographic region as defined by the Department of Transportation ("DOT") area are summarized below:

	2020		2019		2018
	(in millions)
DOT—Domestic	$	1,660.7	$	3,462.8	$	2,990.7
DOT—Latin America and Caribbean	149.3		367.7		332.3
Total	$	1,810.0	$	3,830.5	$	3,323.0