Segment Reporting Total Assets (Details) - USD ($) shares in Millions, $ in Millions	Jul. 07, 2016	Feb. 03, 2016	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total assets			$ 22,196.8	$ 12,276.3
Stock Issued During Period, Value, New Issues		$ 2,500.0
Stock Issued During Period, Shares, New Issues		29.9
Canada [Member]
Segment Reporting Information [Line Items]
Total assets			5,121.4	4,560.6
U.S. [Member]
Segment Reporting Information [Line Items]
Total assets			2,643.6	2,441.0
Europe [Member]
Segment Reporting Information [Line Items]
Total assets			4,784.9	4,807.5
MCI [Member]
Segment Reporting Information [Line Items]
Total assets			115.1	133.7
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets			$ 9,531.8	$ 333.5
2016 Notes [Member]
Segment Reporting Information [Line Items]
Proceeds from Debt, Net of Issuance Costs	$ 6,900.0