Credit commitments (Details) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) quarter facilities
Credit commitments
Credit lines available		$ 14,664
Consolidated net worth		19,550
Minimum consolidated net worth required under credit facilities		9,000
Long-term line of credit outstanding		$ 853
Number of consecutive quarters | quarter		4
Machinery, Energy & Transportation
Credit commitments
Credit lines available		$ 3,375
Long-term line of credit outstanding		0
Financial Products
Credit commitments
Credit lines available		$ 11,289
Interest coverage ratio, numerator		1.73
Interest coverage ratio, denominator		1
Minimum interest coverage ratio required under credit facilities, numerator		1.15
Minimum interest coverage ratio required under credit facilities, denominator		1
Six-month leverage ratio, numerator		6.88
Six month leverage ratio, denominator		1
Year-end leverage ratio, numerator		6.95
Year-end leverage ratio denominator		1
Maximum leverage ratio permissible under credit facility, numerator		10
Maximum leverage ratio permissible under credit facility, denominator		1
Long-term line of credit outstanding		$ 853
Global credit facilities
Credit commitments
Number of global credit facilities | facilities		3
Credit lines available		$ 10,500
Long-term line of credit outstanding		0
Global credit facilities | Machinery, Energy & Transportation
Credit commitments
Credit lines available		2,750
Global credit facilities | Financial Products
Credit commitments
Credit lines available		7,750
Other external
Credit commitments
Credit lines available		4,164
Other external | Machinery, Energy & Transportation
Credit commitments
Credit lines available		625
Other external | Financial Products
Credit commitments
Credit lines available		$ 3,539
364-day credit facility | Global credit facilities
Credit commitments
Credit lines available	$ 3,150
Duration of credit facility (in years or days)	364 days
364-day credit facility | Global credit facilities | Machinery, Energy & Transportation
Credit commitments
Credit lines available	$ 825
Three-year facility | Global credit facilities
Credit commitments
Credit lines available	$ 2,730
Duration of credit facility (in years or days)	3 years
Three-year facility | Global credit facilities | Machinery, Energy & Transportation
Credit commitments
Credit lines available	$ 715
Five-year facility | Global credit facilities
Credit commitments
Credit lines available	$ 4,620
Duration of credit facility (in years or days)	5 years
Five-year facility | Global credit facilities | Machinery, Energy & Transportation
Credit commitments
Credit lines available	$ 1,210