Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended						12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020		Jun. 30, 2019
Segment Reporting Information [Line Items]
Net Sales							$ 14,347,640	$ 13,695,520	[1]	$ 14,320,324	[1]
Segment Operating Income							2,459,941	1,966,704		2,236,239
Corporate administration							1,527,302	1,656,553	[1]	1,543,939	[1]
Interest expense							250,036	308,161	[1]	190,138	[1]
Other (income) expense							(37,052)	151,689		96,626
Income before income taxes	$ 599,340	$ 577,892	$ 413,174	$ 461,213	$ 251,380	$ 431,905	2,246,957	1,506,854	[1]	1,949,475	[1]
Assets							20,341,200	19,887,753	[2]	17,732,028
Property Additions							209,957	232,591		195,089
Depreciation							269,943	252,899	[3]	225,675	[3]
Amortization							325,447	284,632		199,752
Long-Lived Assets							2,266,476	2,292,735		1,768,287
Investment in a joint venture							$ 292,217	317,975
Maximum
Segment Reporting Information [Line Items]
Ownership percentage (or less)							50.00%
Operating Segments
Segment Reporting Information [Line Items]
Net Sales							$ 14,347,640	13,695,520		14,320,324
Segment Operating Income							2,638,368	2,137,607		2,431,233
Corporate
Segment Reporting Information [Line Items]
Corporate administration							178,427	170,903		194,994
Assets							745,117	662,655		2,996,771
Property Additions							3,019	4,064		1,993
Depreciation							7,901	7,058		6,263
Diversified Industrial
Segment Reporting Information [Line Items]
Net Sales							11,960,159	10,960,885
Diversified Industrial | Operating Segments
Segment Reporting Information [Line Items]
Assets							16,518,688	15,973,576		13,189,204
Property Additions							186,233	183,981		172,348
Depreciation							229,891	218,092		203,144
Amortization							274,368	243,714		196,680
Aerospace Systems
Segment Reporting Information [Line Items]
Net Sales							2,387,481	2,734,635
Investment in a joint venture							219,081	237,911		234,703
Aerospace Systems | Operating Segments
Segment Reporting Information [Line Items]
Net Sales							2,387,481	2,734,635		2,510,777
Segment Operating Income							402,895	476,900		487,757
Assets							3,077,395	3,251,522		1,546,053
Property Additions							20,705	44,546		20,748
Depreciation							32,151	27,749		16,268
Amortization							51,079	40,918		3,072
North America
Segment Reporting Information [Line Items]
Net Sales							9,046,162	9,166,773		9,318,195
Long-Lived Assets							1,448,109	1,494,858		1,052,263
North America | Diversified Industrial | Operating Segments
Segment Reporting Information [Line Items]
Net Sales							6,676,449	6,456,298		6,808,948
Segment Operating Income							1,247,419	985,944		1,138,586
International
Segment Reporting Information [Line Items]
Net Sales							5,301,478	4,528,747		5,002,129
Long-Lived Assets							818,367	797,877		716,024
International | Diversified Industrial | Operating Segments
Segment Reporting Information [Line Items]
Net Sales							5,283,710	4,504,587		5,000,599
Segment Operating Income							$ 988,054	$ 674,763		$ 804,890

[1] *Years ended June 30, 2020 and 2019 amounts have been adjusted to reflect the change in inventory accounting method, as described in Notes 1 and 7 to the Consolidated Financial Statements.

[2] *Year ended June 30, 2020 amounts have been adjusted to reflect the change in inventory accounting method, as described in Notes 1 and 7 to the Consolidated Financial Statements.

[3] *Years ended June 30, 2020 and 2019 amounts have been adjusted to reflect the change in inventory accounting method, as described in Notes 1 and 7 to the Consolidated Financial Statements.