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Stock Incentive Compensation and Employee Benefit Plans (Narrative) (Details) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 01, 2013 | May. 31, 2010 d shares | Dec. 31, 2015 USD ($) shares | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2010 | Aug. 31, 2004 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares available for grant | shares |  |  | 3,000,000 |  |  |  |
Total fair value of shares and share units vested |  |  | $ 34,000,000 | $ 48,700,000 | $ 47,000,000 |  |
Cash received from exercises of stock options during the period |  |  | 100,000 | 500,000 | 1,600,000 |  |
Excess windfall tax benefit realized by the Company due to its net operating loss position in the taxable jurisdictions in which it operates |  |  | 0 |  |  |  |
Total stock compensation expense recognized |  |  | 38,300,000 | 37,600,000 | 43,400,000 |  |
Contributions to defined contribution pension plans |  |  | $ 4,300,000 | $ 3,600,000 | $ 3,500,000 |  |
Premium Option Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares reserved for issuance | shares |  |  |  |  |  |  | 6,000,000
Performance Shares |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock incentive compensation, vesting period | 4 years | 3 years |  |  |  |  |
Number of shares available for grant | shares |  | 750,000 |  |  |  |  |
Vesting maximum as a percentage of target if performance goal are achieved |  | 250.00% |  |  |  |  |
Period for average closing share price to determine total shareholder return | d |  | 20 |  |  |  |  |
Employee Stock Option | 2001 Stock Incentive Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares reserved for issuance | shares |  |  | 5,400,000 |  |  |  |
Employee Stock Option | Non-Employee Director Stock Incentive Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares reserved for issuance | shares |  |  | 1,050,000 |  |  |  |
Employee Stock Option | 2001 Stock Incentive Plans and Nonemployee Directors |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock incentive compensation, vesting period |  |  | 4 years |  |  |  |
Share-based payment award, Expiration period |  |  | 10 years |  |  |  |
Restricted Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Expected forfeiture rate |  |  | 0.00% | 2.00% |  |  |
Unrecognized compensation costs related to restricted stock awards |  |  | $ 34,200,000 |  |  |  |
Periods for recognition of compensation costs not yet recognized |  |  | 1 year 8 months 12 days |  |  |  |
Restricted Stock | 2001 Stock Incentive Plans and Nonemployee Directors |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock incentive compensation, vesting period |  |  | 4 years |  |  |  |
Cash Settled Restricted Stock Unit (CSRSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock incentive compensation, vesting period |  |  |  |  |  | 4 years |
Expected forfeiture rate |  |  | 13.00% | 11.00% |  |  |
Performance Shares |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Expected forfeiture rate |  |  | 0.00% | 0.00% |  |  |
Unrecognized compensation costs related to restricted stock awards |  |  | $ 5,000,000 |  |  |  |
Periods for recognition of compensation costs not yet recognized |  |  | 1 year 8 months 12 days |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Unrecognized compensation costs related to restricted stock awards |  |  | $ 24,600,000 |  |  |  |
Periods for recognition of compensation costs not yet recognized |  |  | 1 year 8 months 12 days |  |  |  |

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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