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Note 3 - Operations and Segmentation - Summary of Freight and Other Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from Contract with Customer, Excluding Assessed Tax	$ 6,269	$ 5,504	$ 12,129	$ 10,505
Bulk [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	1,813	1,648	3,645	3,160
Industrial [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	2,091	1,859	4,012	3,515
Premium [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	1,938	1,625	3,625	3,106
Cargo and Freight [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	5,842	5,132	11,282	9,781
Other Subsidiary Revenues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	233	180	438	357
Accessorial Revenues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	183	176	384	337
Other Miscellaneous Product and Service Revenues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 11	$ 16	$ 25	$ 30

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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-Publisher FASB
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