v2.4.0.6

Long-Term Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Class of Stock [Line Items] |
Share option activity |
|  | Options Outstanding |  |  | Options Exercisable |
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Life (in years) |
Balance at January 1, 2011 |  |  | 1,438,514 |  |  | $ | 66.89 |  |  |  |  |  |  |  |  |  |  |  |  |
Options acquired in Merger |  |  | 9,052,566 |  |  |  | 30.66 |  |  |  |  |  |  |  |  |  |  |  |  |
Settled |  |  | (124,278) |  |  |  | 71.64 |  |  |  |  |  |  |  |  |  |  |  |  |
Exercised |  |  | (249,813) |  |  |  | 22.01 |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited/Expired |  |  | (237,029) |  |  |  | 59.88 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2011 |  |  | 9,879,960 |  |  | $ | 34.93 |  |  |  | 8,239,656 |  |  | $ | 37.13 |  |  |  | 4.4 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
Expected volatility |  | 25-55%
Weighted average volatility |  | 45.8%
Expected dividends |  | 3.73%
Expected term (in years) |  | 1-6
Risk-free rate |  | 0.19-1.92%
Restricted Stock [Member] |
Class of Stock [Line Items] |
Non-vested share options |
|  | Number of Shares |  |  | Weighted Average Grant-Date Fair Value |
Balance at January 1, 2011 |  |  | - |  |  | $ | - |
Awards acquired in Merger |  |  | 1,228,944 |  |  |  | 34.07 |
Granted |  |  | 15,500 |  |  |  | 33.82 |
Vested |  |  | (44,060) |  |  |  | 34.07 |
Forfeited |  |  | (7,402) |  |  |  | 34.07 |
Balance at December 31, 2011 |  |  | 1,192,982 |  |  | $ | 34.07 |
Rsu and Psa [Member] |
Class of Stock [Line Items] |
Non-vested share options |
|  | Number of Shares |  |  | Weighted Average Grant-Date Fair Value |  |  | Number of Shares Vested |
Balance at January 1, 2011 |  |  | 1,863,420 |  |  | $ | 31.00 |  |  |  | 87,935 |
Awards acquired in Merger |  |  | 89,864 |  |  |  | 34.07 |  |  |  |  |
Granted |  |  | 1,027,960 |  |  |  | 34.13 |  |  |  |  |
Settled |  |  | (149,053) |  |  |  | 58.51 |  |  |  |  |
Distributed |  |  | (976,185) |  |  |  | 29.66 |  |  |  |  |
Forfeited |  |  | (171,293) |  |  |  | 58.29 |  |  |  |  |
Balance at December 31, 2011 |  |  | 1,684,713 |  |  | $ | 30.43 |  |  |  | 48,735 |

X
- Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration