Business Combinations and Asset Acquisitions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Jan. 30, 2025	Dec. 02, 2024	Jun. 30, 2024	Mar. 18, 2024
Business Combination [Line Items]
Net Intangible	$ 2,095		$ 2,095				$ 1,713
Goodwill	$ 8,906		$ 8,906				$ 4,725
Weighted- Average Remaining Amortization Period (Years)	10 years		10 years
ION
Business Combination [Line Items]
Payments to Acquire Businesses, Gross	$ 1,100
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived						$ 313
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent						8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities						(3)
Business Combination, Recognized Asset Acquired, Receivable, Current						59
Business Combination, Recognized Asset Acquired, Inventory, Current						4
Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current						5
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment						32
Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent						45
Business Combination, Recognized Liability Assumed, Accounts Payable, Current						(10)
Business Combination, Recognized Liability Assumed, Other Liability, Current						(38)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities						(14)
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent						(88)
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)						313
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value						(151)
Goodwill						908
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net						1,070
Business Combination, Acquisition-Related Cost, Expense	$ 6		$ 25
ION | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow
Business Combination [Line Items]
Intangible Assets Measurement Input	9.50%
Specialty Networks
Business Combination [Line Items]
Payments to Acquire Businesses, Gross		$ 1,200
Goodwill								$ 784
Business Combination, Acquisition-Related Cost, Expense	$ 2	$ 15	6	$ 15
ADSG [Member]
Business Combination [Line Items]
Business Combination, Price of Acquisition, Expected	1,100
GIA [Member]
Business Combination [Line Items]
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived					$ 280
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent					76
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities					(1)
Business Combination, Recognized Asset Acquired, Receivable, Current					195
Business Combination, Recognized Asset Acquired, Inventory, Current					21
Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current					13
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment					67
Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent					287
Business Combination, Recognized Liability Assumed, Accounts Payable, Current					(89)
Business Combination, Recognized Liability Assumed, Other Liability, Current					(171)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities					(15)
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent					(209)
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)					454
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value					(884)
Goodwill					3,241
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net					$ 2,811
Business Combination, Acquisition-Related Cost, Expense	59		69
Business Combination, Price of Acquisition, Expected	$ 2,800
Business Combination, Voting Equity Interest Acquired, Percentage					73.00%
GIA [Member] | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow
Business Combination [Line Items]
Intangible Assets Measurement Input	10.00%
Customer Contracts
Business Combination [Line Items]
Net Intangible	$ 231		$ 231
Weighted- Average Remaining Amortization Period (Years)	16 years		16 years
Customer Contracts | ION
Business Combination [Line Items]
Net Intangible						$ 235
Weighted- Average Remaining Amortization Period (Years)						20 years
Customer Contracts | GIA [Member]
Business Combination [Line Items]
Net Intangible					$ 0
Trademarks and Trade Names | ION
Business Combination [Line Items]
Net Intangible						$ 78
Weighted- Average Remaining Amortization Period (Years)						10 years
Trademarks and Trade Names | GIA [Member]
Business Combination [Line Items]
Net Intangible					$ 256
Weighted- Average Remaining Amortization Period (Years)					10 years
Noncompete Agreements
Business Combination [Line Items]
Net Intangible	$ 25		$ 25
Weighted- Average Remaining Amortization Period (Years)	4 years		4 years
Noncompete Agreements | ION
Business Combination [Line Items]
Net Intangible						$ 0
Noncompete Agreements | GIA [Member]
Business Combination [Line Items]
Net Intangible					$ 24
Weighted- Average Remaining Amortization Period (Years)					4 years