Accounts Payable And Other Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Accounts Payable and Other Current Liabilities Details [Abstract]
Income and other taxes payable	$ 744	$ 635
Accounts payable	683	612
Accrued wages and vacation	342	340
Current liabilities operating leases	306	321
Interest payable	234	326
Accrued casualty costs	182	177
Equipment rents payable	96	101
Other	689	592
Total accounts payable and other current liabilities	$ 3,276	$ 3,104