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	419			301	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)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(35)					(35)
Stock-based compensation	16		16
Balance at Jun. 30, 2017	79	315	0	(279)	(158)	201
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of new revenue recognition accounting standard \| Accounting Standards Update 2018-02	0			59	(59)
Balance at Dec. 31, 2017	183	310	0	(298)	(65)	236
Increase (Decrease) in Stockholders' Equity
Total comprehensive income	379			360	6	13
Shares issued	(14)	2	(8)	(8)
Shares retired:
Repurchased	(265)	(7)	(8)	(250)
Surrendered (non-cash)	(19)			(19)
Cash dividends declared	(65)			(65)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(89)					(89)
Stock-based compensation	16		16
Balance at Jun. 30, 2018	$ 126	$ 305	$ 0	$ (221)	$ (118)	$ 160

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Surrendered non cash.

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Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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