Other investments (Tables)

12 Months Ended

Dec. 31, 2016

Investments, All Other Investments [Abstract]

Schedule of other investments

Other investments are classified as available-for-sale, and carried at fair value and are shown in our Consolidated Balance Sheets as follows (in millions).

	Cost				Fair Value
	December 31,				December 31,
	2016		2015		2016		2015
Insurance and other	$	6,720	$	9,690	$	14,364	$	15,683
Finance and financial products		1,000		3,052		2,892		5,719
	$	7,720	$	12,742	$	17,256	$	21,402