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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Millions	Total	Common Shares ($1 par value)	Paid-In Capital	Retained (Deficit) Earnings	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of new revenue recognition accounting standard | Accounting Standards Update 2014-09	$ 6			$ 6
Balance at Dec. 31, 2016	(103)	$ 318	$ 0	(381)	$ (235)	$ 195
Balance (Accounting Standards Update 2014-09) at Dec. 31, 2016	(97)	318	0	(375)	(235)	195
Increase (Decrease) in Stockholders' Equity
Total comprehensive income	173			138	21	14
Shares issued	(1)	1	(2)
Shares retired:
Repurchased	(92)	(3)	(5)	(84)
Surrendered (non-cash)	(13)			(13)
Cash dividends declared	(32)			(32)
Stock-based compensation	7		7
Balance at Mar. 31, 2017	(55)	316	0	(366)	(214)	209
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of new revenue recognition accounting standard | Accounting Standards Update 2018-02 [Member]	0			59	(59)
Balance at Dec. 31, 2017	183	310	0	(298)	(65)	236
Increase (Decrease) in Stockholders' Equity
Total comprehensive income	208			149	40	19
Shares issued	(13)	2	(7)	(8)
Shares retired:
Repurchased	(150)	(4)		(146)
Surrendered (non-cash)	(19)			(19)
Cash dividends declared	(33)			(33)
Stock-based compensation	7		7
Balance at Mar. 31, 2018	$ 183	$ 308	$ 0	$ (296)	$ (84)	$ 255

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