Supplemental cash flow information (Tables)

3 Months Ended

Mar. 31, 2022

Supplemental Cash Flow Elements [Abstract]

Schedule of supplemental cash flow information

A summary of supplemental cash flow information is presented in the following table (in millions).

	First Quarter
	2022		2021
Cash paid during the period for:
Income taxes	$	336	$	256
Interest:
Insurance and other		365		400
Railroad, utilities and energy		708		740