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Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Shares | Non-Controlling Interests
--- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of year at Dec. 31, 2017 |  | $ 561 | $ 784 | $ 13,140 | $ (4,043) | $ (3,083) | $ 83
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Change in accrued stock compensation costs |  |  | (26) |  |  |  |
Issuance of shares under stock compensation plans and employee stock purchase plans |  |  | (26) |  |  | 140 |
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2014-09 |  |  |  | 364 |  |  |
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2016-01 |  |  |  |  | (14) |  |
Net income attributable to the Company | $ 1,232 |  |  | 1,221 |  |  | 11
Dividend equivalents declared |  |  |  | (3) |  |  |
Dividends declared |  |  |  | (591) |  |  |
Other comprehensive income (loss), net of tax | (208) |  |  |  | (208) |  |
Purchase of treasury shares |  |  |  |  |  | (500) |
Net non-controlling interests acquired |  |  |  |  |  |  | 0
Distributions and other changes |  |  |  |  |  |  | (13)
Balance, end of period at Jun. 30, 2018 | $ 7,797 |  | 732 | 14,131 | (4,265) | (3,443) | 81
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Dividends declared per share (in dollars per share) | $ 1.165 |  |  |  |  |  |
Balance, beginning of year at Mar. 31, 2018 |  | 561 | 682 | 13,812 | (3,905) | (3,210) | 81
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Change in accrued stock compensation costs |  |  | 49 |  |  |  |
Issuance of shares under stock compensation plans and employee stock purchase plans |  |  | 1 |  |  | 17 |
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2014-09 |  |  |  | 0 |  |  |
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2016-01 |  |  |  |  | 0 |  |
Net income attributable to the Company | $ 536 |  |  | 531 |  |  | 5
Dividend equivalents declared |  |  |  | (2) |  |  |
Dividends declared |  |  |  | (210) |  |  |
Other comprehensive income (loss), net of tax | (360) |  |  |  | (360) |  |
Purchase of treasury shares |  |  |  |  |  | (250) |
Net non-controlling interests acquired |  |  |  |  |  |  | 0
Distributions and other changes |  |  |  |  |  |  | (5)
Balance, end of period at Jun. 30, 2018 | $ 7,797 |  | 732 | 14,131 | (4,265) | (3,443) | 81
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Dividends declared per share (in dollars per share) | $ 0.415 |  |  |  |  |  |
Balance, beginning of year at Dec. 31, 2018 | $ 7,584 | 561 | 817 | 14,347 | (4,647) | (3,567) | 73
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Change in accrued stock compensation costs |  |  | (42) |  |  |  |
Issuance of shares under stock compensation plans and employee stock purchase plans |  |  | (39) |  |  | 221 |
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2014-09 |  |  |  | 0 |  |  |
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2016-01 |  |  |  |  | 0 |  |
Net income attributable to the Company | 1,071 |  |  | 1,048 |  |  | 23
Dividend equivalents declared |  |  |  | (4) |  |  |
Dividends declared |  |  |  | (650) |  |  |
Other comprehensive income (loss), net of tax | 120 |  |  |  | 120 |  |
Purchase of treasury shares |  |  |  |  |  | (100) |
Net non-controlling interests acquired |  |  |  |  |  |  | 195
Distributions and other changes |  |  |  |  |  |  | (19)
Balance, end of period at Jun. 30, 2019 | $ 8,337 |  | 736 | 14,741 | (4,527) | (3,446) | 272
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Dividends declared per share (in dollars per share) | $ 1.285 |  |  |  |  |  |
Balance, beginning of year at Mar. 31, 2019 |  | $ 561 | 681 | 14,642 | (4,590) | (3,385) | 77
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Change in accrued stock compensation costs |  |  | 59 |  |  |  |
Issuance of shares under stock compensation plans and employee stock purchase plans |  |  | (4) |  |  | 39 |
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2014-09 |  |  |  | 0 |  |  |
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2016-01 |  |  |  |  | 0 |  |
Net income attributable to the Company | $ 344 |  |  | 332 |  |  | 12
Dividend equivalents declared |  |  |  | (2) |  |  |
Dividends declared |  |  |  | (231) |  |  |
Other comprehensive income (loss), net of tax | 63 |  |  |  | 63 |  |
Purchase of treasury shares |  |  |  |  |  | (100) |
Net non-controlling interests acquired |  |  |  |  |  |  | 195
Distributions and other changes |  |  |  |  |  |  | (12)
Balance, end of period at Jun. 30, 2019 | $ 8,337 |  | $ 736 | $ 14,741 | $ (4,527) | $ (3,446) | $ 272
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Dividends declared per share (in dollars per share) | $ 0.455 |  |  |  |  |  |

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