CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Millions	Total	Common Shares ($1 par value)	Paid-In Capital	Retained Deficit	Accumulated Other Comprehensive Loss	Noncontrolling Interest
Balance at Dec. 31, 2015	$ 58	$ 330	$ 0	$ (300)	$ (165)	$ 193
Increase (Decrease) in Stockholders' Equity
Total comprehensive income (loss)	279			259	(5)	25
Shares issued	(11)	2	(13)
Shares retired:
Repurchased	(174)	(6)	(10)	(158)
Surrendered (non-cash)	(11)			(11)
Cash dividends declared	(63)			(63)
Dividends paid to noncontrolling interest	(31)					(31)
Stock-based compensation	23		23
Balance at Jun. 30, 2016	70	326	0	(273)	(170)	187
Balance at Dec. 31, 2016	(103)	318	0	(381)	(235)	195
Increase (Decrease) in Stockholders' Equity
Total comprehensive income (loss)	416			298	77	41
Shares issued	(13)	2	(15)
Shares retired:
Repurchased	(134)	(4)	(1)	(129)
Surrendered (non-cash)	(13)	(1)		(12)
Cash dividends declared	(64)			(64)
Dividends paid to noncontrolling interest	(35)					(35)
Stock-based compensation	16		16
Balance at Jun. 30, 2017	$ 70	$ 315	$ 0	$ (288)	$ (158)	$ 201