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Earnings Per Share and Equity (Narrative) (Details) - USD ($) |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 01, 2012 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Nov. 17, 2016 | Jun. 08, 2015 | Dec. 01, 2014 | Mar. 22, 2013
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Anti-dilutive shares (in shares) |  | 1,700,000 | 1,300,000 | 6,100,000 |  |  |  |
Amount remaining to be repurchased under the stock repurchase program |  | $ 628,200,000 | $ 628,200,000 | $ 976,000,000 |  |  |  |
Number of repurchased shares |  | 0 | 30,400,000 | 13,900,000 |  |  |  |
Payments of tax withholding for restricted shares |  | $ 12,300,000 | $ 14,700,000 | $ 9,100,000 |  |  |  |
Shares reissued or retired |  | 0 |  |  |  |  |  |
Non-controlling interest in consolidated subsidiary |  | $ 21,800,000 | 23,700,000 |  |  |  |  |
Income attributable to non-controlling interests |  | 2,400,000 | 2,800,000 | 2,400,000 |  |  |  |
Dividend to non-controlling shareholder of consolidated subsidiary |  | $ 4,300,000 | $ 0 | 4,200,000 |  |  |  |
Noncontrolling Interest, increase from Acquisition of Noncontrolling Interest |  |  |  | $ 20,400,000 |  |  |  |
Leshan [Member] |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Ownership percentage |  | 80.00% |  |  |  |  |  |
Amount of non-controlling interest acquired in the period (as a percent) |  |  | 10.00% |  |  |  |  |
Treasury Stock [Member] |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Number of repurchased shares |  |  | 30,352,607 | 13,900,105 |  |  |  |
Shares withheld for payment of taxes (in shares) |  | (1,281,159) | (1,226,764) | (976,786) |  |  |  |
Noncontrolling Interest [Member] | Leshan [Member] |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Non-controlling interest in consolidated subsidiary |  |  |  | $ 20,900,000 |  |  |  |
Income attributable to non-controlling interests |  |  |  | 2,400,000 |  |  |  |
Dividend to non-controlling shareholder of consolidated subsidiary |  |  |  | 4,200,000 |  |  |  |
Purchase price |  |  |  | 20,400,000 |  |  |  |
Noncontrolling Interest, increase from Acquisition of Noncontrolling Interest |  |  |  | 10,100,000 |  |  |  |
Noncontrolling interest, period increase |  |  |  | $ 10,300,000 |  |  |  |
2.625% Notes, Series B [Member] |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Debt instrument, interest rate (as a percent) |  | 2.625% |  |  | 2.625% |  |  |
Conversion price per share (in dollars per share) |  | $ 10.50 |  |  |  |  |  |
2012 Program [Member] |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Amount authorized under the stock repurchase program | $ 300,000,000.0 |  |  |  |  |  |  |
Period in which the company intends to repurchase the shares | 3 years |  |  |  |  |  |  |
Amount remaining to be repurchased under the stock repurchase program |  |  |  |  |  |  | $ 46,300,000 |
2014 Program [Member] |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Period in which the company intends to repurchase the shares |  | 4 years |  |  |  |  |  |
Amount remaining to be repurchased under the stock repurchase program |  | $ 1,000,000,000 |  |  |  |  |  |
Cash allocation policy, target percentage to return to shareholders |  | 80.00% |  |  |  |  |  |
Debt Exchange - 2013 [Member] | 2.625% Notes, Series B [Member] |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Debt instrument, interest rate (as a percent) |  | 2.625% |  |  |  |  |  | 2.625%
1.00% Notes [Member] |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Debt instrument, interest rate (as a percent) |  | 1.00% | 1.00% |  |  |  |  |
1.00% Notes [Member] | Convertible Debt [Member] |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Debt instrument, interest rate (as a percent) |  | 1.00% |  |  |  | 1.00% |  |
Average price of common stock to exceed to include effect of additional potential shares |  | $ 25.96 |  |  |  |  |  |
Conversion price per share (in dollars per share) |  | $ 18.50 |  |  |  |  |  |
Number of repurchased shares |  |  | 5,400,000 |  |  |  |  |

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