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Segment Information (Revenue and Tangible Assets by Geographic Location) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 1,256.1 | $ 752.3 | $ 639.5 | $ 553.6 | $ 791.2 | $ 670.5 | $ 476.8 | $ 408.9 | $ 3,201.5 | $ 2,347.4 | $ 2,399.6
Tangible Assets | 4,429.7 |  |  |  | 3,153.6 |  |  |  | 4,429.7 | 3,153.6 |
Canada |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 56.0 | 55.1 | 69.0
Tangible Assets | 55.9 |  |  |  | 165.7 |  |  |  | 55.9 | 165.7 |
United States |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,431.9 | 1,550.2 | 1,712.1
Tangible Assets | 4,155.7 |  |  |  | 2,848.6 |  |  |  | 4,155.7 | 2,848.6 |
Other Foreign |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 713.6 | 742.1 | $ 618.5
Tangible Assets | $ 218.1 |  |  |  | $ 139.3 |  |  |  | $ 218.1 | $ 139.3 |

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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