Business Segment Information - Segment reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net Sales	$ 3,160,603	$ 3,702,432	$ 3,497,974	$ 3,334,511	$ 3,681,467	$ 3,687,518	$ 3,472,045	$ 3,479,294	$ 13,695,520	$ 14,320,324	$ 14,302,392
Segment Operating Income									1,966,704	2,236,239	2,038,278
Corporate administration									1,656,553	1,543,939	1,639,989
Interest expense									308,161	190,138	213,873
Other expense									145,916	112,676	122,128
Income before income taxes									1,512,627	1,933,425	1,702,277
Assets	19,738,189				17,576,690				19,738,189	17,576,690	15,320,087
Property Additions									232,591	195,089	247,667
Depreciation									252,899	225,675	237,806
Amortization									284,632	199,752	215,681
Long-Lived Assets	2,292,735				1,768,287				2,292,735	1,768,287	1,856,237
Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income									2,137,607	2,431,233	2,239,179
Corporate
Segment Reporting Information [Line Items]
Corporate administration									170,903	194,994	200,901
Assets	513,091				2,841,433				513,091	2,841,433	504,723
Property Additions									4,064	1,993	35,973
Depreciation									7,058	6,263	9,421
Diversified Industrial
Segment Reporting Information [Line Items]
Net Sales									10,960,885	11,809,547
Diversified Industrial | Operating Segments
Segment Reporting Information [Line Items]
Assets	15,973,576				13,189,204				15,973,576	13,189,204	13,368,619
Property Additions									183,981	172,348	196,469
Depreciation									218,092	203,144	211,648
Amortization									243,714	196,680	212,742
Aerospace Systems
Segment Reporting Information [Line Items]
Net Sales									2,734,635	2,510,777	2,315,699
Aerospace Systems | Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income									476,900	487,757	397,970
Assets	3,251,522				1,546,053				3,251,522	1,546,053	1,446,745
Property Additions									44,546	20,748	15,225
Depreciation									27,749	16,268	16,737
Amortization									40,918	3,072	2,939
North America
Segment Reporting Information [Line Items]
Net Sales									9,166,773	9,318,195	8,978,490
Long-Lived Assets	1,494,858				1,052,263				1,494,858	1,052,263	1,103,308
North America | Diversified Industrial
Segment Reporting Information [Line Items]
Net Sales									6,456,298	6,808,948	6,726,900
North America | Diversified Industrial | Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income									985,944	1,138,586	1,076,021
International
Segment Reporting Information [Line Items]
Net Sales									4,528,747	5,002,129	5,323,902
Long-Lived Assets	$ 797,877				$ 716,024				797,877	716,024	752,929
International | Diversified Industrial
Segment Reporting Information [Line Items]
Net Sales									4,504,587	5,000,599	5,259,793
International | Diversified Industrial | Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income									$ 674,763	$ 804,890	$ 765,188