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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table presents the changes in Accumulated other comprehensive income (loss), excluding noncontrolling interests:
|  | Foreign Currency Translation Adjustment and Other |  | Unrealized Gain (loss) on Investment Securities, Net |  | Unrealized Gain (Loss) on Interest Rate Swaps Designated as Cash Flow Hedges, Net |  | Employee Benefit Plan Items, Net |  | Total
Balance as of December 31, 2015 |  | $ | (241,326 | ) |  | $ | 8,533 |  |  | $ | (3,320 | ) |  | $ | (48,593 | ) |  | $ | (284,706 | )
Other comprehensive income (loss) before reclassifications (a) |  | (103,254 | ) |  | (2,439 | ) |  | — |  |  | (737 | ) |  | (106,430 | )
Amounts reclassified into income (loss) |  | (3,976 | ) |  | — |  |  | 373 |  |  | 10,885 |  |  | 7,282 |
Net change in accumulated other comprehensive income (loss) for the year ended December 31, 2016 |  | (107,230 | ) |  | (2,439 | ) |  | 373 |  |  | 10,148 |  |  | (99,148 | )
Balance as of December 31, 2016 |  | (348,556 | ) |  | 6,094 |  |  | (2,947 | ) |  | (38,445 | ) |  | (383,854 | )
Other comprehensive income (loss) before reclassifications (a) |  | 253,259 |  |  | 8,852 |  |  | (2,870 | ) |  | (3,812 | ) |  | 255,429 |
Amounts reclassified into income (loss) |  | (9,756 | ) |  | — |  |  | 511 |  |  | 12,665 |  |  | 3,420 |
Net change in accumulated other comprehensive income (loss) for the year ended December 31, 2017 |  | 243,503 |  |  | 8,852 |  |  | (2,359 | ) |  | 8,853 |  |  | 258,849 |
Balance as of December 31, 2017 |  | $ | (105,053 | ) |  | $ | 14,946 |  |  | $ | (5,306 | ) |  | $ | (29,592 | ) |  | $ | (125,005 | )
(a) | Foreign currency translation adjustment includes intra-entity foreign currency transactions that are of a long-term investment nature of $(64,610) and $(12,852) for 2017 and 2016, respectively.
Schedule of Stock by Class [Table Text Block] | The following table sets forth the activity in the number of shares outstanding (in thousands):
|  | Common Stock Issued |  | Treasury Stock |  | Common Stock Outstanding
Common stock outstanding at December 31, 2014 |  | 125,424 |  |  | 29,529 |  |  | 95,895 |
Shares issued for stock-based compensation awards |  | — |  |  | (1,155 | ) |  | 1,155 |
Repurchases of common stock |  | — |  |  | 6,127 |  |  | (6,127 | )
Common stock outstanding at December 31, 2015 |  | 125,424 |  |  | 34,501 |  |  | 90,923 |
Shares issued for stock-based compensation awards |  | — |  |  | (1,372 | ) |  | 1,372 |
Repurchases of common stock |  | — |  |  | 3,382 |  |  | (3,382 | )
Common stock outstanding at December 31, 2016 |  | 125,424 |  |  | 36,511 |  |  | 88,913 |
Shares issued for stock-based compensation awards |  | — |  |  | (1,097 | ) |  | 1,097 |
Repurchases of common stock |  | — |  |  | 2,319 |  |  | (2,319 | )
Common stock outstanding at December 31, 2017 |  | 125,424 |  |  | 37,733 |  |  | 87,691 |
Share-Repurchase Programs [Table Text Block] | The following table shows the company's share-repurchase programs with activity in the years ended December 31, 2017, 2016, and 2015:
Month of Board Approval |  | Dollar Value Approved for Repurchase |  | Dollar Value of Shares Repurchased |  | Approximate Dollar Value of Shares that May Yet be Purchased Under the Program
May 2014 |  | $ | 200,000 |  |  | $ | 200,000 |  |  | $ | — |
December 2014 |  | 200,000 |  |  | 200,000 |  |  | — |
September 2015 |  | 400,000 |  |  | 400,000 |  |  | — |
December 2016 |  | 400,000 |  |  | 41,079 |  |  | 358,921 |
Total |  | $ | 1,200,000 |  |  | $ | 841,079 |  |  | $ | 358,921 |

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- Definition Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65877616&loc=d3e177068-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21553-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65888546&loc=d3e21300-112643 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 + Details
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