Debt (Vendor Financing Obligations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Roll Forward]
Balance at January 1	$ 14,516.3
Principal payments on operating-related vendor financing	(1,408.0)	$ (2,381.7)	$ (1,821.9)
Principal payments on capital-related vendor financing	(964.4)	(2,088.8)	(2,085.9)
Balance at December 31	14,398.8	14,516.3
Vendor financing
Debt Instrument [Roll Forward]
Balance at January 1	1,099.6	1,344.9
Balance at January 1, including amounts classified as held for sale	3,905.4	3,727.3
Operating-related vendor financing additions	1,781.6	2,754.5
Capital-related vendor financing additions	661.1	1,339.6
Principal payments on operating-related vendor financing	(1,408.0)	(2,381.7)
Principal payments on capital-related vendor financing	(964.4)	(2,088.8)
Foreign currency, acquisitions and other	108.8	554.5
Total vendor financing obligations	4,084.5	3,905.4	3,727.3
Balance at December 31	843.2	1,099.6	1,344.9
Vendor financing | U.K. J.V. Entities
Debt Instrument [Roll Forward]
Balance at January 1	2,805.8	2,382.4
Balance at December 31	$ 3,241.3	$ 2,805.8	$ 2,382.4