Supplemental Cash Flow Data (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Change in Operating Capital [Abstract]
(Increase) decrease in accounts receivable	$ 343.6	$ 1,435.6
(Increase) decrease in work in process and other current assets	(308.6)	121.0
Increase (decrease) in accounts payable	(1,071.3)	(3,110.7)
Increase (decrease) in customer advances, taxes payable and other current liabilities	(86.2)	(216.8)
Change in other assets and liabilities, net	111.8	(25.8)
Increase (decrease)	(1,010.7)	(1,796.7)
Income taxes paid	320.2	249.4
Interest paid	157.4	116.5
Operating leases, Net increase in lease liability	111.2	114.7
Finance leases, Net increase in lease liability	$ 47.9	$ 23.5