Debt (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Commercial Paper and Borrowings Under Bank Credit Facilities
Balance	$ 11.0	$ 17.3
Weighted average interest rate	3.86%	2.74%
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	$ (7,450.6)	$ (6,492.2)
Debt discount, net	(54.5)	(49.1)
Debt adjustment for fair value hedges	(8.0)	(11.6)
Total Debt	7,388.1	6,431.5
Rail Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	250.0
4.35% Notes due February 2024
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	300.0	300.0
3.25% Notes due March 2025
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	300.0	300.0
3.25% Notes due September 2026
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	350.0	350.0
3.85% Notes due March 2027
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	300.0	300.0
3.50% Notes due March 2028
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	300.0	300.0
4.55% Notes due November 2028
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	300.0	300.0
4.70% Notes due April 2029
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	500.0	500.0
4.00% Notes due June 2030
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	500.0	500.0
1.90% Notes due June 2031
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	400.0	400.0
3.50% Notes due June 2032
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	400.0	400.0
4.90% Notes due March 2033
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	400.0	400.0
5.45% Notes due September 2033
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	400.0	0.0
6.05% Notes due March 2034
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	300.0	0.0
6.90% Notes due May 2034
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	400.0	0.0
5.20% Notes due March 2044
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	300.0	300.0
4.50% Notes due March 2045
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	250.0	250.0
3.10% Notes due June 2051
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	550.0	550.0
3.90% Notes due March 2023
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	0.0	250.0
0.85% Notes due May 2024
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	115.8	112.4
0.96% Notes due November 2024
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	110.4	107.1
1.00% Notes due March 2025
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	110.4	107.1
1.13% Notes due August 2025
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	110.4	107.1
0.90% Schuldschein loan due October 2026
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	25.4	24.6
1.07% Notes due November 2026
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	82.8	80.2
5.23% Schuldschein loan due November 2026
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	41.4	0.0
1.17% Schuldschein loan due October 2028
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	57.4	55.6
1.56% Schuldschein loan due October 2031
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	82.8	80.3
8.39% - 8.83% Delayed draw term loan due June 2027 (3)
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	49.4	0.0
8.13% - 8.53% Delayed draw term loan due February 2028 (3)
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	27.6	0.0
8.74% - 8.94% Delayed draw term loan due February 2029 (3)
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	24.0	0.0
Total unsecured fixed rate debt
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	7,087.8	6,074.4
7.08% Notes due January 2026
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	(100.0)	0.0
6.73% Notes due January 2028
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	(50.0)	0.0
7.58% Notes due September 2029
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	(50.0)	(50.0)
5.10% Delayed draw term loan due December 2023
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	0.0	(250.0)
Total Recourse Floating Rate Debt [Member]
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	362.8	417.8
Total Recourse Floating Rate Debt [Member] | Rail North America [Member]
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	200.0	300.0
5.42% Notes due December 2027
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	(121.4)	(117.8)
6.33% Schuldschein loan due November 2030
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	(41.4)	0.0
UNITED STATES
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	6,250.0	5,400.0
Europe
Outstanding balances of debt obligations and the applicable interest rates
Total debt principal	(162.8)	(117.8)
Total Debt	736.8	674.4
INDIA
Outstanding balances of debt obligations and the applicable interest rates
Total Debt	101.0	$ 0.0
Line of Credit US [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 600.0