CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions	Total	Common Stock Shares	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2018		1,174
Beginning balance at Dec. 31, 2018	$ 15,386,000,000		$ (5,511,000,000)	$ 14,939,000,000	$ 78,000,000	$ 5,880,000,000	$ 0
Increase (Decrease) in Stockholders' Equity
Net income	667,000,000					667,000,000
Foreign CTA	(67,000,000)				(67,000,000)
Net investment hedge CTA gain	0
Unrealized gains on cash flow hedges, net	(46,000,000)				(46,000,000)
Tax expense on unrealized gains on cash flow hedges, net	1,000,000				1,000,000
Unrealized gains on investments, net	11,000,000				11,000,000
Tax expense on unrealized gains on investments, net	(2,000,000)				(2,000,000)
Common stock and stock-based awards issued and assumed, net of shares withheld for employee taxes (in shares)		6
Common stock and stock-based awards issued and assumed, net of shares withheld for employee taxes	(302,000,000)			(302,000,000)
Common stock repurchased (in shares)		(8)
Common stock repurchased	(750,000,000)		(705,000,000)	(45,000,000)
Stock-based compensation	256,000,000			256,000,000
Ending balance (in shares) at Mar. 31, 2019		1,172
Ending balance at Mar. 31, 2019	$ 15,157,000,000		(6,216,000,000)	14,848,000,000	(25,000,000)	6,550,000,000	0
Beginning balance (in shares) at Dec. 31, 2019	1,173	1,173
Beginning balance at Dec. 31, 2019	$ 16,929,000,000		(6,872,000,000)	15,588,000,000	(173,000,000)	8,342,000,000	44,000,000
Increase (Decrease) in Stockholders' Equity
Net income	84,000,000					84,000,000
Foreign CTA	(171,000,000)				(171,000,000)
Net investment hedge CTA gain	71,000,000				71,000,000
Unrealized gains on cash flow hedges, net	144,000,000				144,000,000
Tax expense on unrealized gains on cash flow hedges, net	(2,000,000)				(2,000,000)
Unrealized gains on investments, net	15,000,000				15,000,000
Tax expense on unrealized gains on investments, net	(4,000,000)				(4,000,000)
Common stock and stock-based awards issued and assumed, net of shares withheld for employee taxes (in shares)		8
Common stock and stock-based awards issued and assumed, net of shares withheld for employee taxes	$ (382,000,000)			(382,000,000)
Common stock repurchased (in shares)	(8)	(8)
Common stock repurchased	$ (800,000,000)		(800,000,000)
Stock-based compensation	$ 295,000,000			295,000,000
Ending balance (in shares) at Mar. 31, 2020	1,173	1,173
Ending balance at Mar. 31, 2020	$ 16,011,000,000		$ (7,672,000,000)	$ 15,501,000,000	$ (120,000,000)	$ 8,258,000,000	$ 44,000,000