Debt (Vendor Financing Obligations) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Vendor Financing Obligation [Roll Forward]
Balance at January 1	$ 14,398.8
Principal payments on operating-related vendor financing	(208.4)	$ (655.3)
Principal payments on capital-related vendor financing	(35.9)	(434.6)
Balance at March 31	14,190.5
Vendor financing
Vendor Financing Obligation [Roll Forward]
Balance at January 1	843.2	1,099.6
Balance at January 1, including amounts classified as held for sale	843.2	3,905.4
Operating-related vendor financing additions	133.7	849.0
Capital-related vendor financing additions	66.7	320.0
Foreign currency, acquisitions and other	(9.7)	26.4
Total vendor financing obligations	789.6	4,010.9
Balance at March 31	789.6	1,035.6
Vendor financing | U.K. J.V. Entities
Vendor Financing Obligation [Roll Forward]
Balance at January 1	0.0	2,805.8
Balance at March 31	$ 0.0	$ 2,975.3