Financing - Minimum Principal Payments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
2022	$ 2,156.5
2023	0.0
2024	0.0
2025	0.0
2026	900.0
Thereafter	550.0
Total principal payments	3,606.5
Debt discounts, premiums and issuance costs	13.0	$ 57.0
Commercial Paper
Debt Instrument [Line Items]
Debt discounts, premiums and issuance costs	13.0
Carrying value	364.9
Term Loans
Debt Instrument [Line Items]
2022	1,000.0
2023	0.0
2024	0.0
2025	0.0
2026	0.0
Thereafter	0.0
Total principal payments	1,000.0
Convertible and Registered Notes
Debt Instrument [Line Items]
2022	1,156.5
2023	0.0
2024	0.0
2025	0.0
2026	900.0
Thereafter	550.0
Total principal payments	$ 2,606.5

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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