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Equity (Dividends and Stock Repurchase Program) (Details) (USD $) | 0 Months Ended | 3 Months Ended | 12 Months Ended | 42 Months Ended
--- | --- | --- | --- | ---
Dec. 18, 2013 | Dec. 11, 2013 | Nov. 04, 2013 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared on common stock (per share amount) |  |  | $ 0.05 | $ 0.09 | $ 0 | $ 0.08 | $ 0 | $ 0.04 | $ 0.04 | $ 0 | $ 0 | $ 0.17 | $ 0.08 | $ 0 |
Stock repurchase program, authorized amount |  | $ 211,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, remaining authorized repurchase amount |  | 450,000,000 |  |  |  |  |  |  |  |  |  | 191,000,000 |  |  |
Stock issued during period, new issues | 46,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price | $ 13.45 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, new issues underwriters option | 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of treasury stock (shares) | 20,000,000 |  |  |  |  |  |  |  |  |  |  | 25,297,042 |  |  | 94,728,430
Treasury stock acquired, average price per share | $ 12.912 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12.10
Purchase of treasury stock | $ 258,000,000 |  |  |  |  |  |  |  |  |  |  | $ 322,000,000 | $ 301,000,000 | $ 279,000,000 | $ 1,100,000,000
Treasury stock, shares (in shares) |  |  |  | 90,808,168 |  |  |  | 66,415,984 |  |  |  | 90,808,168 | 66,415,984 |  | 90,808,168

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: 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 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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