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Debt (Summary of Loss on Extinguishment of Debt) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015
Extinguishment of Debt [Line Items] |  |  |  |
Loss on extinguishment of debt | $ 28 | $ 0 | $ 28 | $ 0
Revolving Credit Facility |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Loss on extinguishment of debt |  |  | 1 |
Term Loan Due 2022 & 5.25% Senior Notes |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Loss on extinguishment of debt |  |  | 24 |
Starz credit facility & Starz Senior Notes |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Loss on extinguishment of debt |  |  | $ 3 |

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
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