Fair Value of Financial Instruments - Hierarchy (Details) - Recurring basis - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Assets:
Time deposits and money market funds	$ 12.4	$ 183.2
Short-term investments	96.8	50.0
Interest rate and cross currency swap agreements	7.1	7.6
Forward currency contracts		2.1
Embedded derivatives in purchase and delivery contracts		0.1
Fixed price commodity contracts	0.8	3.1
Debt securities available for sale	1.2	1.2
Total assets recorded at fair value	118.3	247.3
Liabilities:
Contingent consideration	5.6	4.3
Hybrid instrument liability	14.3	13.9
Interest rate and cross currency swap agreements	29.0	61.5
Embedded derivatives in purchase and delivery contracts	0.1
Forward currency contracts	0.7	0.4
Long-term fixed interest rate debt	535.1	549.8
Total liabilities recorded at fair value	584.8	629.9
Significant Other Observable Inputs (Level 2)
Assets:
Time deposits and money market funds	12.4	183.2
Short-term investments	96.8	50.0
Interest rate and cross currency swap agreements	7.1	7.6
Forward currency contracts		2.1
Embedded derivatives in purchase and delivery contracts		0.1
Fixed price commodity contracts	0.8	3.1
Total assets recorded at fair value	117.1	246.1
Liabilities:
Interest rate and cross currency swap agreements	29.0	61.5
Embedded derivatives in purchase and delivery contracts	0.1
Forward currency contracts	0.7	0.4
Long-term fixed interest rate debt	535.1	549.8
Total liabilities recorded at fair value	564.9	611.7
Significant Unobservable Inputs (Level 3)
Assets:
Debt securities available for sale	1.2	1.2
Total assets recorded at fair value	1.2	1.2
Liabilities:
Contingent consideration	5.6	4.3
Hybrid instrument liability	14.3	13.9
Total liabilities recorded at fair value	$ 19.9	$ 18.2