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Debt - Schedule of Long-term Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Total debt, Principal Balance $ 5,043.5 $ 5,044.2
Current maturities of long-term debt, Principal Balance 136.6 138.9
Long-term debt, Principal Balance 4,906.9 4,905.3
Current maturities of long-term debt, Carrying Value 117.0 136.5
Convertible senior notes    
Debt Instrument [Line Items]    
Total debt, Principal Balance 38.4 49.4
Capital leases for equipment    
Debt Instrument [Line Items]    
Total debt, Principal Balance 120.5 97.4
Senior notes due 2023    
Debt Instrument [Line Items]    
Total debt, Principal Balance 535.0 535.0
Senior notes due 2022    
Debt Instrument [Line Items]    
Total debt, Principal Balance 1,600.0 1,600.0
Senior notes due 2021    
Debt Instrument [Line Items]    
Total debt, Principal Balance 570.6 527.1
Senior notes due 2018    
Debt Instrument [Line Items]    
Total debt, Principal Balance 265.8 265.8
Term loan facility    
Debt Instrument [Line Items]    
Total debt, Principal Balance 1,494.0 1,481.9
Senior debentures due 2034    
Debt Instrument [Line Items]    
Total debt, Principal Balance 300.0 300.0
Euro private placement notes due 2020    
Debt Instrument [Line Items]    
Total debt, Principal Balance 13.7 12.6
Asset financing    
Debt Instrument [Line Items]    
Total debt, Principal Balance 105.5 145.0
Level 1    
Debt Instrument [Line Items]    
Total debt 3,675.6 3,586.2
Level 1 | Convertible senior notes    
Debt Instrument [Line Items]    
Total debt 150.9 129.8
Level 1 | Capital leases for equipment    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Level 1 | Senior notes due 2023    
Debt Instrument [Line Items]    
Total debt 561.8 560.4
Level 1 | Senior notes due 2022    
Debt Instrument [Line Items]    
Total debt 1,682.0 1,689.4
Level 1 | Senior notes due 2021    
Debt Instrument [Line Items]    
Total debt 602.0 546.0
Level 1 | Senior notes due 2018    
Debt Instrument [Line Items]    
Total debt 272.0 274.0
Level 1 | Term loan facility    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Level 1 | Senior debentures due 2034    
Debt Instrument [Line Items]    
Total debt 301.4 241.6
Level 1 | Euro private placement notes due 2020    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Level 1 | Asset financing    
Debt Instrument [Line Items]    
Total debt 105.5 145.0
Level 2    
Debt Instrument [Line Items]    
Total debt 1,637.5 1,648.5
Level 2 | Convertible senior notes    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Level 2 | Capital leases for equipment    
Debt Instrument [Line Items]    
Total debt 120.5 97.4
Level 2 | Senior notes due 2023    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Level 2 | Senior notes due 2022    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Level 2 | Senior notes due 2021    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Level 2 | Senior notes due 2018    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Level 2 | Term loan facility    
Debt Instrument [Line Items]    
Total debt 1,502.9 1,507.1
Level 2 | Senior debentures due 2034    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Level 2 | Euro private placement notes due 2020    
Debt Instrument [Line Items]    
Total debt 14.1 14.0
Level 2 | Asset financing    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
Carrying Value    
Debt Instrument [Line Items]    
Total debt 4,871.3 4,868.0
Current maturities of long-term debt, Carrying Value 117.0 136.5
Long-term debt, Carrying Value 4,754.3 4,731.5
Carrying Value | Convertible senior notes    
Debt Instrument [Line Items]    
Total debt 37.8 47.1
Carrying Value | Capital leases for equipment    
Debt Instrument [Line Items]    
Total debt 120.5 97.4
Carrying Value | Senior notes due 2023    
Debt Instrument [Line Items]    
Total debt 527.5 527.1
Carrying Value | Senior notes due 2022    
Debt Instrument [Line Items]    
Total debt 1,581.5 1,579.9
Carrying Value | Senior notes due 2021    
Debt Instrument [Line Items]    
Total debt 564.5 520.7
Carrying Value | Senior notes due 2018    
Debt Instrument [Line Items]    
Total debt 266.5 267.1
Carrying Value | Term loan facility    
Debt Instrument [Line Items]    
Total debt 1,451.0 1,439.2
Carrying Value | Senior debentures due 2034    
Debt Instrument [Line Items]    
Total debt 201.8 200.8
Carrying Value | Euro private placement notes due 2020    
Debt Instrument [Line Items]    
Total debt 14.7 13.7
Carrying Value | Asset financing    
Debt Instrument [Line Items]    
Total debt 105.5 145.0
ABL facility    
Debt Instrument [Line Items]    
Total debt, Principal Balance 0.0 30.0
ABL facility | Level 1    
Debt Instrument [Line Items]    
Total debt 0.0 0.0
ABL facility | Level 2    
Debt Instrument [Line Items]    
Total debt 0.0 30.0
ABL facility | Carrying Value    
Debt Instrument [Line Items]    
Total debt $ 0.0 $ 30.0