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Acquisitions (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2025 USD ($) business	Dec. 31, 2024 USD ($) business
Business Combination
Business combination, recognized identifiable assets acquired and liabilities assumed, goodwill	$ 17,577	$ 17,260
2024 Business Combinations
Business Combination
Number of businesses acquired | business	2	3
Total cash consideration, net of cash acquired		$ 515
Business combination, recognized identifiable assets acquired and liabilities assumed, equipment	$ 139
Business combination, recognized identifiable assets acquired and liabilities assumed, goodwill	345
2024 Business Combinations | Customer Relationships
Business Combination
Business combination, recognized identifiable assets acquired and liabilities assumed, goodwill	$ 87

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