Fair Value Measurements (Details 3) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Assets
Cash and short-term investments	$ 5,345	$ 6,081	$ 5,982	$ 5,490
Available-for-sale securities	1,562	1,570
Carrying Amount
Assets
Cash and short-term investments	5,345	6,081
Restricted cash and short-term investments	86	53
Available-for-sale securities	1,562	1,570
Finance receivables-net (excluding finance leases)	16,394	16,049
Wholesale inventory receivables-net (excluding finance leases)	1,428	1,529
Foreign currency contracts-net	34	45
Interest rate swaps-net	64	116
Liabilities
Short-term borrowings	4,515	3,679
Commodity contracts-net	1	0
Guarantees	13	13
Carrying Amount | Machinery, Energy & Transportation
Liabilities
Long-term debt (including amounts due within one year)	8,757	8,759
Carrying Amount | Financial Products
Liabilities
Long-term debt (including amounts due within one year)	24,819	25,312
Carrying amount of assets excluded from measurement at fair value
Assets
Finance leases	8,093	8,053
Level 1 | Fair Value
Assets
Cash and short-term investments	5,345	6,081
Restricted cash and short-term investments	86	53
Liabilities
Short-term borrowings	4,515	3,679
Level 1 & 2 | Fair Value
Assets
Available-for-sale securities	1,562	1,570
Level 2 | Fair Value
Assets
Finance receivables-net (excluding finance leases)	16,113	15,913
Wholesale inventory receivables-net (excluding finance leases)	1,361	1,467
Foreign currency contracts-net	34	45
Interest rate swaps-net	64	116
Liabilities
Commodity contracts-net	1	0
Level 2 | Fair Value | Machinery, Energy & Transportation
Liabilities
Long-term debt (including amounts due within one year)	10,136	9,905
Level 2 | Fair Value | Financial Products
Liabilities
Long-term debt (including amounts due within one year)	25,399	25,849
Level 3 | Fair Value
Liabilities
Guarantees	$ 13	$ 13