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)	427			393	(5)	39
Shares issued	(24)	3	(27)
Shares retired:
Repurchased	(252)	(8)	(8)	(236)
Surrendered (non-cash)	(14)			(14)
Cash dividends declared	(96)			(96)
Dividends paid to noncontrolling interest	(31)					(31)
Stock-based compensation	35		35
Balance at Sep. 30, 2016	103	325	0	(253)	(170)	201
Balance at Dec. 31, 2016	(103)	318	0	(381)	(235)	195
Increase (Decrease) in Stockholders' Equity
Total comprehensive income (loss)	613			446	108	59
Shares issued	(14)	2	(16)
Shares retired:
Repurchased	(312)	(8)	(6)	(298)
Surrendered (non-cash)	(15)	(1)		(14)
Cash dividends declared	(96)			(96)
Dividends paid to noncontrolling interest	(35)					(35)
Stock-based compensation	22		22
Balance at Sep. 30, 2017	$ 60	$ 311	$ 0	$ (343)	$ (127)	$ 219