CONSOLIDATED INCOME STATEMENTS (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020		Sep. 30, 2021	Sep. 30, 2020
Income Statement
Revenue		$ 3,292	$ 2,648		$ 9,095	$ 7,758
Expense
Labor and Fringe		631	574		1,847	1,687
Purchased Services and Other	[1]	577	382		1,490	1,272
Depreciation		367	348		1,060	1,036
Fuel		247	119		631	402
Equipment and Other Rents		94	88		269	247
Gains on Property Dispositions		(60)	(4)		(430)	(33)
Total Expense		1,856	1,507		4,867	4,611
Operating Income		1,436	1,141		4,228	3,147
Interest Expense		(177)	(187)		(542)	(565)
Other Income - Net		20	14		60	51
Earnings Before Income Taxes		1,279	968		3,746	2,633
Income Tax Expense		(311)	(232)		(899)	(628)
Net Earnings		$ 968	$ 736		$ 2,847	$ 2,005
Per Common Share
Net Earnings Per Share, Basic (in dollars per share)		$ 0.43	$ 0.32	[2]	$ 1.26	$ 0.87	[2]
Net Earnings Per Share, Assuming Dilution (in dollars per share)		$ 0.43	$ 0.32	[2]	$ 1.26	$ 0.87	[2]
Average Shares Outstanding (in shares)		2,237	2,295	[2]	2,263	2,302	[2]
Average Shares Outstanding, Assuming Dilution (in shares)		2,242	2,300	[2]	2,268	2,307	[2]

[1] Beginning third quarter 2021, the Company changed the name of Materials, Supplies and Other expense to Purchased Services and Other, which better describes the composition of this expense amount. This change in naming convention does not impact previously reported results.

[2] All prior period share and per share data has been retroactively adjusted to reflect the stock split effective June 28, 2021. Certain prior year data has been reclassified to conform to the current presentation.