Capital structure and noncontrolling interests - Summary of Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Noncontrolling Interest [Abstract]
Common stock, dividends declared (in dollars per share)	$ 0.5275	$ 0.5275	$ 0.5275
Dividend Payment (in millions)	$ 121	$ 120	$ 120

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-SubTopic 405
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477787/942-405-45-2

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration