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Supplemental cash flow information
 12 Months Ended
Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]  
Supplemental cash flow information

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Supplemental cash flow information

A summary of supplemental cash flow information for each of the three years ending December 31, 2021 is presented in the following table (in millions).

 

 

 

2021

 

 

2020

 

 

2019

 

Cash paid during the year for:

 

 

 

 

 

 

 

 

 

 

 

 

Income taxes

 

$

5,412

 

 

$

5,001

 

 

$

5,415

 

Interest:

 

 

 

 

 

 

 

 

 

 

 

 

Insurance and other

 

 

1,227

 

 

 

1,001

 

 

 

1,011

 

Railroad, utilities and energy

 

 

3,162

 

 

 

3,006

 

 

 

2,879

 

Non-cash investing and financing activities:

 

 

 

 

 

 

 

 

 

 

 

 

Liabilities assumed in connection with business acquisitions

 

 

102

 

 

 

6,981

 

 

 

766

 

Operating lease liabilities arising from obtaining right-of-use assets

 

 

687

 

 

 

729

 

 

 

782