Equity and Redeemable Noncontrolling Interests - Noncontrolling Interests Narrative (Details) shares in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) interest entity shares	Dec. 31, 2020 USD ($)
Noncontrolling Interest [Line Items]
Number of redeemable noncontrolling interest redemptions | interest	1
Payments for redeemable noncontrolling interest	$ 60,000,000
Number of redeemable noncontrolling interests, redeemable over time | interest	3
Redeemable noncontrolling interest, equity, exercisable		$ 0
Non-managing member unitholders	$ 201,056,000	199,158,000
Noncontrolling Interests
Noncontrolling Interest [Line Items]
Non-managing members DownREIT units outstanding (in shares) | shares	5
Conversion of DownREIT units (in shares) | shares	7
Number of DownREIT LLCs (in entities) | entity	7,000,000
Non-managing member unitholders	$ 201,000,000	199,000,000
DownREIT unit, fair value	$ 264,000,000	$ 221,000,000