Consolidated Statements of Comprehensive Income (Loss) € in Millions, shares in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2016 EUR (€) shares	Jun. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) $ / shares shares
Investment income	$ 8.7	$ 6.4		$ 16.8	$ 12.1
Provision for losses on receivables				12.7	9.4
European Commission charge		(109.6)		0.0	833.0
Income before income taxes	539.0	646.2		987.2	216.6
Income taxes	166.0	164.9		303.9	329.9
Net Income (Loss)	$ 373.0	$ 481.3		$ 683.3	$ (113.3)
Net Income (Loss) Per Share
Basic | $ / shares	$ 1.06	$ 1.37		$ 1.94	$ (0.32)
Diluted | $ / shares	$ 1.06	$ 1.37		$ 1.94	$ (0.32)
Weighted Average Number of Common Shares Outstanding
Basic | shares	351.8	350.9	350.9	351.7	351.1
Diluted | shares	352.7	351.6	351.6	352.7	351.1
Dividends declared per share | $ / shares	$ 0.25	$ 0.24		$ 0.49	$ 0.48
Comprehensive Income (Loss)	$ 505.8	$ 443.4		$ 886.2	$ (23.4)
Truck, Parts and Other
Net sales and revenues	4,397.9	4,115.8		8,333.6	8,126.4
Cost of sales and revenues	3,755.2	3,489.4		7,137.4	6,903.0
Research and development	66.1	60.8		127.1	120.4
Selling, general and administrative	107.8	110.2		219.1	220.5
European Commission charge	0.0	(109.6)	€ (97.3)	0.0	833.0
Interest and other expense,(income), net	1.5	2.5		(0.1)	2.6
Costs and Expenses, Total	3,930.6	3,553.3		7,483.5	8,079.5
Income before income taxes	467.3	562.5		850.1	46.9
Financial Services
Interest and fees	104.2	107.1		206.4	214.5
Operating lease, rental and other revenues	202.1	190.3		402.1	372.3
Revenues	306.3	297.4		608.5	586.8
Interest and other borrowing expenses	37.4	32.6		71.5	62.9
Depreciation and other expenses	172.8	156.4		352.5	307.3
Selling, general and administrative	26.3	25.1		51.5	49.6
Provision for losses on receivables	6.8	6.0		12.7	9.4
Costs and Expenses, Total	243.3	220.1		488.2	429.2
Income before income taxes	$ 63.0	$ 77.3		$ 120.3	$ 157.6