Revenue Recognition - Schedule of ASC 606 Impact on Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Assets
Inventories	$ 883.8	$ 806.9
Prepaid expenses and other current assets	238.4	203.2
Total current assets	2,778.5	2,819.6
Total assets	11,225.6	11,628.8
Liabilities and Shareholders’ Equity
Other non-current liabilities	414.6	429.5
Total non-current liabilities	3,790.7	4,022.2
Total liabilities	5,328.3	5,458.2
Accumulated deficit
Accumulated deficit	(1,852.2)	(1,975.5)
Total controlling interest	5,897.1	6,170.5
Total shareholders’ equity	5,897.3	6,170.6
Total liabilities and shareholders' equity	11,225.6	$ 11,628.8
Adjustments | Accounting Standards Update 2014-09
Assets
Inventories	13.7
Prepaid expenses and other current assets	(19.2)
Total current assets	(5.5)
Total assets	(5.5)
Liabilities and Shareholders’ Equity
Other non-current liabilities	(0.4)
Total non-current liabilities	(0.4)
Total liabilities	(0.4)
Accumulated deficit
Accumulated deficit	(5.1)
Total controlling interest	(5.1)
Total shareholders’ equity	(5.1)
Total liabilities and shareholders' equity	(5.5)
Balances without adoption of ASC 606
Assets
Inventories	897.5
Prepaid expenses and other current assets	219.2
Total current assets	2,773.0
Total assets	11,220.1
Liabilities and Shareholders’ Equity
Other non-current liabilities	414.2
Total non-current liabilities	3,790.3
Total liabilities	5,327.9
Accumulated deficit
Accumulated deficit	(1,857.3)
Total controlling interest	5,892.0
Total shareholders’ equity	5,892.2
Total liabilities and shareholders' equity	$ 11,220.1