Equity and Redeemable Noncontrolling Interests - Share Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Aug. 01, 2022
Equity [Abstract]
Stock repurchase program, authorized amount				$ 500,000,000
Common stock repurchased (in shares)	5.8
Average cost per share (in dollars per share)	$ 17.11
Stock repurchase program, total value	$ 100,000,000	$ 0	$ 56,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 344,000,000

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-2

Reference 2: 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 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481549/505-30-45-1

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration