Condensed Consolidated Statement of Changes in Equity (Unaudited) - 6 months ended Jun. 30, 2017 - USD ($) shares in Thousands, $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]
Accumulated Other Comprehensive Income (Loss), Beginning balance at Dec. 31, 2016	$ 5,320	$ 6	$ 4,850	$ 7,388	$ (80)	$ (6,867)	$ 23
Beginning balance, shares at Dec. 31, 2016		630,282				(190,967)
Consolidated net income	658			660			(2)
Other comprehensive income, net of tax expense	47				47
Cash dividends	(381)			(381)
Equity-based compensation transactions, net	114		(16)	4		$ 126
Equity-based compensation transaction, shares						3,519
Common stock repurchase program	(250)		(5)			$ (245)
Common stock repurchase program, shares						(3,125)
Other, net	(1)		(1)
Other, net, shares						2
Accumulated Other Comprehensive Income (Loss), Ending balance at Jun. 30, 2017	$ 5,507	$ 6	$ 4,828	$ 7,671	$ (33)	$ (6,986)	$ 21
Ending balance, shares at Jun. 30, 2017		630,282				(190,571)