Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING ACTIVITIES:
Net Income	$ 1,675.2	$ 521.7	$ 1,604.0
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization, Property, plant and equipment	321.4	302.4	292.2
Depreciation and amortization, Equipment on operating leases and other	786.1	690.7	614.9
Provision for losses on financial services receivables	22.3	18.4	12.4
Deferred taxes	(173.9)	30.9	(55.2)
Other, net	43.6	30.3	46.6
Pension contributions	(70.6)	(185.7)	(62.9)
(Increase) decrease in assets other than cash and cash equivalents:
Trade and other receivables	(207.2)	(61.8)	105.3
Wholesale receivables on new trucks	(272.0)	401.6	(273.4)
Sales-type finance leases and dealer direct loans on new trucks	71.9	116.1	(6.6)
Inventories	(149.9)	64.1	64.3
Other assets, net	131.4	41.0	(125.1)
Increase (decrease) in liabilities:
Accounts payable and accrued expenses	333.6	(8.6)	(162.6)
Residual value guarantees and deferred revenues	166.3	155.9	242.0
Other liabilities, net	37.6	183.8	260.1
Net Cash Provided by Operating Activities	2,715.8	2,300.8	2,556.0
INVESTING ACTIVITIES:
Originations of retail loans and direct financing leases	(3,116.8)	(2,825.9)	(3,064.5)
Collections on retail loans and direct financing leases	2,713.7	2,509.8	2,681.9
Net decrease (increase) in wholesale receivables on used equipment	5.2	9.5	(24.7)
Purchases of marketable debt securities	(970.3)	(1,031.9)	(1,329.8)
Proceeds from sales and maturities of marketable debt securities	779.5	1,304.8	1,035.5
Payments for property, plant and equipment	(423.4)	(375.2)	(286.7)
Acquisitions of equipment for operating leases	(1,423.2)	(1,589.7)	(1,438.5)
Proceeds from asset disposals	470.7	433.8	448.8
Other, net		0.5	3.1
Net Cash Used in Investing Activities	(1,964.6)	(1,564.3)	(1,974.9)
FINANCING ACTIVITIES:
Payments of cash dividends	(558.3)	(829.3)	(680.5)
Purchases of treasury stock		(70.5)	(201.6)
Proceeds from stock compensation transactions	39.3	29.4	21.8
Net increase (decrease) in commercial paper and short-term bank loans	352.1	(322.8)	250.7
Proceeds from term debt	1,670.2	1,994.8	1,993.2
Payments on term debt	(1,897.1)	(1,625.1)	(1,580.1)
Net Cash Used in Financing Activities	(393.8)	(823.5)	(196.5)
Effect of exchange rate changes on cash	91.6	(13.7)	(105.8)
Net Increase (Decrease) in Cash and Cash Equivalents	449.0	(100.7)	278.8
Cash and cash equivalents at beginning of year	1,915.7	2,016.4	1,737.6
Cash and cash equivalents at end of year	$ 2,364.7	$ 1,915.7	$ 2,016.4