CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Millions	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]	Total
Beginning balance at Dec. 31, 2016	$ 6	$ 4,850	$ 7,388	$ (80)	$ (6,867)	$ 23	$ 5,320
Beginning balance, shares at Dec. 31, 2016	630,282				(190,967)
Equity roll forward
Consolidated net income			1,949				1,949
Other comprehensive income (loss), net of tax				88			88
Cash dividends declared			(750)				(750)
Equity-based compensation transactions, net		38	1		$ 146		185
Equity-based compensation transaction, shares					4,064
Common stock repurchase program		45			$ (795)		$ (750)
Common stock repurchase program, shares					(10,058)		(10,058,000)
Other, net, shares					(3)
Ending balance at Dec. 31, 2017	$ 6	4,933	8,588	8	$ (7,516)	23	$ 6,042
Ending balance, shares at Dec. 31, 2017	630,282				(196,964)
Equity roll forward
Consolidated net income			1,925			(2)	1,923
Other comprehensive income (loss), net of tax				(90)			(90)
Cash dividends declared			(802)				(802)
Equity-based compensation transactions, net		60	1		$ 90		151
Equity-based compensation transaction, shares					2,345
Common stock repurchase program					$ (1,008)		$ (1,008)
Common stock repurchase program, shares					(11,673)		(11,673,000)
Adoption of new accounting standards			85	(5)			$ 80
Divestiture of noncontrolling interest						(19)	(19)
Other, net						(1)	(1)
Other, net, shares					(7)
Ending balance at Dec. 31, 2018	$ 6	4,993	9,797	(87)	$ (8,434)	1	6,276
Ending balance, shares at Dec. 31, 2018	630,282				(206,299)
Equity roll forward
Consolidated net income			1,670			1	1,671
Other comprehensive income (loss), net of tax				79			79
Cash dividends declared			(876)				(876)
Equity-based compensation transactions, net		56	1		$ 107		164
Equity-based compensation transaction, shares					2,585
Common stock repurchase program					$ (244)		$ (244)
Common stock repurchase program, shares					(2,247)		(2,247,000)
Other, net, shares					5
Ending balance at Dec. 31, 2019	$ 6	$ 5,049	$ 10,592	$ (8)	$ (8,571)	$ 2	$ 7,070
Ending balance, shares at Dec. 31, 2019	630,282				(205,956)