CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Shares ($1 par value)	Paid-In Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Balance at Dec. 31, 2016	$ (96)	$ 318	$ 0	$ (374)	$ (235)	$ 195
Increase (Decrease) in Stockholders' Equity
Total comprehensive income (loss)	779			533	170	76
Shares issued	(19)	2	(21)
Shares retired:
Repurchased	(331)	(9)	(8)	(314)
Surrendered (non-cash)	(15)	(1)		(14)
Cash dividends declared	(129)			(129)
Dividends paid to noncontrolling interest	(35)					(35)
Stock-based compensation	29		29
Balance at Dec. 31, 2017	183	310	0	(298)	(65)	236
Increase (Decrease) in Stockholders' Equity
Reclassification of disproportionate tax effects (Refer to Note O)	0			59	(59)
Total comprehensive income (loss)	764			734	(3)	33
Shares issued	(9)	3	(4)	(8)
Shares retired:
Repurchased	(654)	(19)	(26)	(609)
Surrendered (non-cash)	(19)			(19)
Cash dividends declared	(137)			(137)
Dividends paid to noncontrolling interest	(89)					(89)
Stock-based compensation	30		30
Balance at Dec. 31, 2018	69	294	0	(278)	(127)	180
Increase (Decrease) in Stockholders' Equity
Total comprehensive income (loss)	924			935	(52)	41
Shares issued	15	3	12
Shares retired:
Repurchased	(896)	(20)	(42)	(834)
Surrendered (non-cash)	(10)	(1)		(9)
Cash dividends declared	(146)			(146)
Dividends paid to noncontrolling interest	(42)					(42)
Stock-based compensation	30		30
Balance at Dec. 31, 2019	$ (56)	$ 276	$ 0	$ (332)	$ (179)	$ 179