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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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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

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