Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt, Principal Balance	$ 5,122.6	$ 5,044.2
Current maturities of long-term debt, Principal Balance	136.6	138.9
Long-term debt, Principal Balance	4,986.0	4,905.3
Current maturities of long-term debt, Carrying Value	135.0	136.5
Convertible senior notes
Debt Instrument [Line Items]
Total debt, Principal Balance	49.4	49.4
Capital leases for equipment
Debt Instrument [Line Items]
Total debt, Principal Balance	107.0	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	534.6	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	12.8	12.6
Asset financing
Debt Instrument [Line Items]
Total debt, Principal Balance	124.0	145.0
Level 1
Debt Instrument [Line Items]
Total debt	3,616.7	3,586.2
Level 1 | Convertible senior notes
Debt Instrument [Line Items]
Total debt	144.0	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	557.7	560.4
Level 1 | Senior notes due 2022
Debt Instrument [Line Items]
Total debt	1,677.0	1,689.4
Level 1 | Senior notes due 2021
Debt Instrument [Line Items]
Total debt	562.6	546.0
Level 1 | Senior notes due 2018
Debt Instrument [Line Items]
Total debt	272.5	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	278.9	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	124.0	145.0
Level 2
Debt Instrument [Line Items]
Total debt	1,724.0	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	107.0	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	1,503.8	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	13.2	14.0
Level 2 | Asset financing
Debt Instrument [Line Items]
Total debt	0.0	0.0
Carrying Value
Debt Instrument [Line Items]
Total debt	4,945.9	4,868.0
Current maturities of long-term debt, Carrying Value	135.0	136.5
Long-term debt, Carrying Value	4,810.9	4,731.5
Carrying Value | Convertible senior notes
Debt Instrument [Line Items]
Total debt	47.8	47.1
Carrying Value | Capital leases for equipment
Debt Instrument [Line Items]
Total debt	107.0	97.4
Carrying Value | Senior notes due 2023
Debt Instrument [Line Items]
Total debt	527.2	527.1
Carrying Value | Senior notes due 2022
Debt Instrument [Line Items]
Total debt	1,580.7	1,579.9
Carrying Value | Senior notes due 2021
Debt Instrument [Line Items]
Total debt	528.4	520.7
Carrying Value | Senior notes due 2018
Debt Instrument [Line Items]
Total debt	266.8	267.1
Carrying Value | Term loan facility
Debt Instrument [Line Items]
Total debt	1,448.8	1,439.2
Carrying Value | Senior debentures due 2034
Debt Instrument [Line Items]
Total debt	201.3	200.8
Carrying Value | Euro private placement notes due 2020
Debt Instrument [Line Items]
Total debt	13.9	13.7
Carrying Value | Asset financing
Debt Instrument [Line Items]
Total debt	124.0	145.0
ABL facility
Debt Instrument [Line Items]
Total debt, Principal Balance	100.0	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	100.0	30.0
ABL facility | Carrying Value
Debt Instrument [Line Items]
Total debt	$ 100.0	$ 30.0