Supplemental cash flow information (Tables)

9 Months Ended

Sep. 30, 2017

Supplemental Cash Flow Elements [Abstract]

Schedule of supplemental cash flow information

Supplemental cash flow information follows (in millions).

	First Nine Months
	2017		2016
Cash paid during the period for:
Income taxes	$	1,774	$	2,237
Interest:
Insurance and other businesses		747		499
Railroad, utilities and energy businesses		2,111		2,130
Finance and financial products businesses		296		263
Non-cash investing and financing activities:
Liabilities assumed in connection with business acquisitions		685		17,319
Equity securities exchanged in connection with business acquisition		—		4,239
Equity securities surrendered in connection with warrant exercise		4,965		—