Equity Method Investees - Combination of Operations and Financial Position (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Condensed Income Statement Information
Gross profit	$ 1,243.8	$ 1,299.6	$ 1,352.2	$ 1,321.4	$ 1,313.1	$ 1,293.5	$ 1,316.2	$ 1,294.3	$ 5,217.0	$ 5,217.1	$ 5,147.4
Net income	186.7	$ 225.3	$ 267.5	$ 258.4	250.2	$ 239.1	$ 256.5	$ 227.6	937.9	973.4	1,114.2
Condensed Balance Sheet Information
Current assets	6,192.6				6,046.3				6,192.6	6,046.3
Total assets	17,597.7				17,120.9				17,597.7	17,120.9
Current liabilities	6,279.1				6,580.6				6,279.1	6,580.6
Equity	5,580.9				5,418.5				5,580.9	5,418.5	4,933.4	$ 4,351.7
Total liabilities and equity	17,597.7				17,120.9				17,597.7	17,120.9
Equity method investees
Condensed Income Statement Information
Revenues									13,215.4	13,967.4	13,884.1
Gross profit									2,953.4	2,960.9	2,917.3
Net income									667.1	691.9	$ 1,008.3
Condensed Balance Sheet Information
Current assets	2,191.5				2,272.2				2,191.5	2,272.2
Noncurrent assets	20,626.0				21,564.1				20,626.0	21,564.1
Total assets	22,817.5				23,836.3				22,817.5	23,836.3
Current liabilities	6,475.5				5,971.8				6,475.5	5,971.8
Noncurrent liabilities	11,103.0				13,004.9				11,103.0	13,004.9
Equity	5,239.0				4,859.6				5,239.0	4,859.6
Total liabilities and equity	$ 22,817.5				$ 23,836.3				$ 22,817.5	$ 23,836.3