Capital structure and noncontrolling interests - Summary of Redeemable Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning of period	$ 256	$ 349	$ 311	$ 298
Distributions		(1)
Redemption of redeemable noncontrolling interests		(6)
Expiration of redemption option		(92)
Redeemable noncontrolling interest adjustment	4			4
Accretion of redeemable noncontrolling interests	2	6	9	9
Balance, end of period	262	256	320	311
Operating Partnership Units
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning of period	27	120	94	85
Distributions		(1)
Redemption of redeemable noncontrolling interests		(6)
Expiration of redemption option		(92)
Redeemable noncontrolling interest adjustment	0			0
Accretion of redeemable noncontrolling interests	1	6	9	9
Balance, end of period	28	27	103	94
Preference Shares
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning of period	221	221	217	213
Distributions		0
Redemption of redeemable noncontrolling interests		0
Expiration of redemption option		0
Redeemable noncontrolling interest adjustment	4			4
Accretion of redeemable noncontrolling interests	0	0	0	0
Balance, end of period	225	221	$ 217	$ 217
Operating Subsidiaries
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning of period	8	8
Distributions		0
Redemption of redeemable noncontrolling interests		0
Expiration of redemption option		0
Redeemable noncontrolling interest adjustment	0
Accretion of redeemable noncontrolling interests	1	0
Balance, end of period	$ 9	$ 8

Temporary Equity, Decrease From Distributions To Noncontrolling Interest Holders

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- Definition

Temporary Equity, Expiration Of Redemption Option

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No definition available.

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- Definition

Temporary Equity, Redeemable Noncontrolling Interest Adjustment

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- Definition

Temporary Equity, Redemption Of Redeemable Noncontrolling Interest

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Value of accretion of temporary equity to its redemption value during the period.

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- Definition

Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

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