Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Jan. 01, 2024
Goodwill [Line Items]
Goodwill			$ 4,725.0	$ 4,613.0	$ 5,856.0
Goodwill impairment loss			675.0	1,227.0
Disposal Group, Including Discontinued Operation, Goodwill				24.0
Amortization of Intangible Assets			264.0	281.0	311.0
Estimated annual amortization of intangible assets - 2025			255.0
Estimated annual amortization of intangible assets - 2026			244.0
Estimated annual amortization of intangible assets - 2027			217.0
Estimated annual amortization of intangible assets - 2028			190.0
Estimated annual amortization of intangible assets - 2029			186.0
GMPD
Goodwill [Line Items]
Goodwill						$ 90.0
OptiFreight Logistics
Goodwill [Line Items]
Goodwill			48.0
GMPD
Goodwill [Line Items]
Goodwill			0.0	681.0	1,899.0
Accumulated goodwill impairment loss			5,400.0	4,700.0
Goodwill impairment loss	$ 90.0	$ 585.0	675.0	1,227.0	2,100.0
Terminal Growth Rate, Fair Value Input	11.00%
Discount Rate, fair value inputs	2.00%
Disposal Group, Including Discontinued Operation, Goodwill				0.0
Other Operating Segment
Goodwill [Line Items]
Goodwill			1,170.0	1,170.0	1,170.0
Accumulated goodwill impairment loss			829.0	829.0
Goodwill impairment loss			0.0	0.0
Disposal Group, Including Discontinued Operation, Goodwill				0.0
Other Operating Segment | OptiFreight Logistics
Goodwill [Line Items]
Goodwill						$ 48.0
Pharmaceutical and Specialty Solutions
Goodwill [Line Items]
Goodwill			3,555.0	2,762.0	$ 2,787.0
Goodwill impairment loss			$ 0.0	0.0
Disposal Group, Including Discontinued Operation, Goodwill				24.0
Pharmaceutical and Specialty Solutions | Outcomes Divestiture
Goodwill [Line Items]
Disposal Group, Including Discontinued Operation, Goodwill				$ 24.0