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Supplemental Financial Information (Cash Flows Information) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Supplemental Financial Information [Abstract] |  |  |
(Increase) decrease in other assets | $ (76.4)us-gaap_IncreaseDecreaseInOtherOperatingAssets | $ (94.1)us-gaap_IncreaseDecreaseInOtherOperatingAssets | $ 67.8 us-gaap_IncreaseDecreaseInOtherOperatingAssets
Increase (decrease) in liabilities | 208.2 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | (10.3)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | 312.3 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
(Increase) decrease in accounts receivable | (38.5)us-gaap_IncreaseDecreaseInAccountsReceivable | (46.7)us-gaap_IncreaseDecreaseInAccountsReceivable | 59.1 us-gaap_IncreaseDecreaseInAccountsReceivable
Changes in operating assets and liabilities | $ (93.3)us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet | $ 151.1 us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet | $ (439.2)us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet

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- Definition The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. + 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=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in other assets used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets, other noncurrent assets, or a combination of other current and noncurrent assets. + 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=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in other assets used in operating activities less other operating liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets and liabilities, other noncurrent assets and liabilities, or a combination of other current and noncurrent assets and liabilities. + 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=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in other liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current liabilities, other noncurrent liabilities, or a combination of other current and noncurrent liabilities. + 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=31042434&loc=d3e3602-108585 + Details
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