Non-Marketable Investments (Tables)

3 Months Ended

Mar. 31, 2017

Investments, All Other Investments [Abstract]

Investment in other assets

The following table presents a reconciliation for our non-marketable debt securities measured and recorded at fair value on a recurring basis, using significant unobservable inputs (Level 3) (in millions, unaudited):

	Three Months Ended
	March 31,
	2016			2017
Beginning balance	$	1,024		$	1,165
Total net gains (losses)
Included in other comprehensive income	90			65
Purchases	24			64
Sales	(6		)	(1		)
Settlements	0			(3		)
Ending balance	$	1,132		$	1,290